HEWLETT PACKARD - materias.fi.uba.armaterias.fi.uba.ar/6644/info/varios/distorsimetro/hp331a.pdfThe...

HEWLETT PACKARD

CERTIFICATION

The Hewlett-Pacmkard C’ompany certilies that Ibis instrunwni was

thoroughly tested and inspected and found lo meet ils published

specifications roben it ruas shipped fronl the factor>*. The Hewlett-

Packard Cornpany further certifies Ihat z?s calibralion nwmurements

are traceable to the U.S. National Uureau of Standards to thc exlent

allouxd by the Uureau’s calihration facility.

WARRANTY AND ASSISTANCE

Al1 Hewlett-Packard products are warranted against defecto in

materials and workn~hip. This warranty applies for one year from

the date of delivery, or, in the c88e of certnin majar compr)nents listed

in the operating manual. for the specitied periud. We will repair or

replace producta which prove to be defect.ive during the warrant.y

periad. No other warranty is expi or implied. 1% are not. liable

for cqnsequential damages.

For any assistance contact. your near&. Hewlet.t.-Packard Sales and

Service Ofice. Addw are provi&d at. t.he back of this manual.

,

u B . . B, B B a. B II B re B B- B 1..

1 1

1. ll L c

OPERATING AND SERVICE MANUAL

(HP PART NO. 00331-90001)

MODEL 33lA/332A ‘\

DISTORTION ANALYZER

SERIALS PREFIXED: 331A - 536- 332A- 536-

Appendix C, Manual Bachiating Ctmnges, adapte thle manual to Seriale Preflxd:

427- (33lA); 617- pnd 504- (332A)

Copyright Hewlett-Packard Company 1965 P. 0. Box 301, Lovelad Colorado, 60537 U. 8. k

Printod: NOV 1965

. . 3 d

Li ,. . . M

H

Model 33IA/332A

TABLt Of CONTCNTS

Sectlon Page 1 GENERAL INFORMATION. ........ l-3

l-l. Descrlptlon ............. l-3 l-6. Accessorlee AvaflabIe. ....... l-3 l-g. Optlons AvallabIe .......... l-3 l-ll. Inetrument Identlflcatlon ...... l-3

S&iOll Page II INSTALLATION .............. 2-l

2-l. InapectIon. ............. 2-r 2-3. Power Requlrementa ........ 2-l 2- 5. Three-Conductor Power Cable ... 2-l 2-5. Installatlon. ............. 2-l 2-10. Rack/Bench InstallaHon .... 2-l 2-12. Repackaglng Lor Shlpment ... 2-l

Sectlon Page III OPERATING INSTRUCTIONS ....... S- 1

3-l. Introduction ............. 3-l 3-4. Control8 and Indlcatore ....... 3-l 3-6. Adjustment of Mechanlcal Zero. .. 3-l 3-8. General Operatlng Informatlon ... 3-l 3-Q. Input Connectlone ........ 3-I 3-11. Voltmeter Characterlstlca ... 3-l 3-14. Uee of Output Terminal8 .... 3-2 3-15. OperaHng Procedures. ....... 3-2 S-18. Dletortlon Mode. ........ 3-2 3-19. Dletortlon Measuremenle ln

Percent ............ 3-2 3-22. Voltmeter Mode. . . . . . . . . 3-3 3-24. IUgh Gain Wlde Band Amplifler . 3-3

Sectlon Pape Iv THEORY OF OPERATfON. . . . . . . . . 4-l

4-l. OveraIl DescrlpHon . . . . . . . . . 4-l 4-3. Block Dlagram Deecríption . . . . . 4-l 4-4. Dletortlon Measurlng Mode. . . 4-l 4-6. Dletortlon Measurement ln

AM Carriers . . . . . . . . . 4-I 4-8. Voltmeter Mode. . . . . . . . . 4-l 4-10. SchemaHc Theory . . . . . . . . . . 4-l 4-11. Imp&fmce Converter Clrcult. . 4-l 4-14. RejecHon Ampllfler Clrcult . . 4-2 4-20. Meter Clrcult. . . . . . . . . . 4-3 4-25. Power Supply Clrcult . . . . . . 4-3 4-30. RFDetector Clrcuit (332Aonly). 4-3

Sectlon Page V MAINTENANCE . . . . . . . . . . . . . . 5- 1

5-1. Introductlon . . . . . . . . . . . . . 5-l 5-3. Te8t Equlpment Requlred . . . . . . 5-l 5-5. Performance Che&3 . . . . . . . . 5-l

Table of Content8 Lalat of Tablrs

Sectlon V (Cont’d) -Q. - Fundamenta1 Rejectlon Check

(331Aj332A). . . . . . . . . . 5-l 5-10. S&nd Harmkc Accuracy

Check (331A’332A) . . . . . . 5-2 5-11. Dlstortion Introduced by In-

strument Check (33111’332A) . 5-2 5-12. Frequency Calibratlon Accuracy

Check (331A’332A) . . . . . . 5-3 5-13. Input ResIstance Check (331A./

332A2............. 5-4 5-14. Input Shunt Capacitance Check

(331A/332A). . . . . . . . . . 5-4 5-15. Mlnimum Input Leve1 Check

(3314/332A). . . . . . . . . . 5- 5 5-16. DCIsolation Check(331A/332A). 5-5 5-17. Voltmeter Accurary Check

(331Ai332A). . . . . . . . , . 5-5 5-18. Voltmeter Frcquency Response

Check (33IA!332A) . . . . . . 5-g 5-19. Residual Nolee Check (331A/

332A) . . . . . . . . . . . . . 5-0 5-20. AM Detector Check (Mcdel

332A only) . . . . . . . . . . . 5-7 5-21. Adjustmenl and Callbratlon Pro-

ccdure. . . . . . . . . . . . . . . 5-7 5-24. Meter Mechanical Zero Set. . . 5-7 5-20. Power Supply Adjustmentn . . . 5-7 5-27. Voltmeter Gain Adjuetments . . 5-7 5-28. Voltmeter Frequency Response

Adjuetment . . . . . . . . . . 5-g S-29. Sensltlvlty Swltch Calibratlon . 5-Q 5-30. C3 Bridge Balance Adjust . . . 5-9 I-31. Trcubleshooting Prr>cedure. . . . . 5-Q 5-37. Bottom Shleld Removal . . . . 5-11 5-39. Serviclng Etched Clrcult

Boarde . . . . . . . . . . . . 5-11 5-42. Serviclng Rotary Swltchee . . . 5-11

Sectlon Page VI SCHEMATIC DIAGRAhIS. . . . . . . . 6-1.‘6-2

6-1. Schematlc Diagrama. . . . . . . 6-I/6-2

sectton Page VII REPLACEABLE PARTS. . . . . . . . . . 7-l

7-1. Intr9duct10n . . . . . , . . . . . . . 7-l 7-4. Orderlng Informatlon . . . . . . . . 7-l 7-0. Non-Listed Parta. . , . . . . . 7-l

pedix CODE LIST OF MANUFACTURERS SALES AND SERVICE OFFICES MANUAL BACKDATING CHANGES

LIS1 ot TABLCS Number Page l-l. Speciflcatl~8 . . . . . . . . . . . . . . . l-l l-2. Acceeeories Awllable. . . . . . . . . . . l-3 3-l. Effect of Rarmonlcs on Voltage Meaeure-

Number Page 5-4. Frequency Calibrathm Accuracy Check. . 5-4 5-5. Voltmeter Frequency Response Check . . 5-6 5-6. Power Supply Adjuetments. . . . . . . . . 6-g 1 c mente. . . . . . . . . . . . . . . . . . . 3-l 5-7. Senaitlvlty Swltch Callbratlon . . . . . . . 5-9

5-l. Test Equlpment Requlred . . . . . . . . . 5-O 5-8. Truubleshooting Ald . . . . . . . . . . . . 5-10 5-2. Second Iiarmonic Accuracy Check. . . . . 5-2 5-Q. Normal Troubleshootlng Indlcatlone. . . . 5-12 5-3. Dlstorthm Introduced by hstrument 7-l. Referente Dealgnatton Index. , . . . . . . 7-2

Check................... 5-3 7-2. Replaceable Parta. . . . . . . . . . . . . 7-11

01772-2 iii

List of IHuetraHone Model 33lA/332A

LIST OF ILLUSTRATIONS Number me Number Page

Model 331A Dletortlon Analvxer. . . . . . l-l 6-3. Test Setup for Frequency mlbratlon l l-l. 3-l. 4-l. 4-a.

4-3. 4-4.

4- 5. 5-l.

5-2.

Front and Rear Panel De13&Ha . . . . 3-O Model 331A and 332A Block Dlagram . . . 4-O Wlen Bridge Clrcult and RejecHon

Characteristlcs. . . . . . . . . . . . . . 4-2 Bandwidth verBus Null Depth . . . . . . . 4-4 Rejectlon Ampllfler Block Diagram and

Typical Frequency Rejectlon Charac- terlstlc . . . . . . . . . . . . . . . . . 4- 5

Slmpllfled Meterlng Clrcuit . . . . . . . . 4-5 Teet Setup for Fundamental RejecHon

check. . . . . . . . . . . . . . . . . . . 5-l Test Setup for MstorHar Introduced by

Inetrument Check. . . . . . . . . . . . . 6-2

b4.

5-5. 5-6.

5-7. 5-8. 0-1. B-2. B-3. 0-4.

Accurac) Chect 1 . . -. . . . . . . . . . 5-3 Tcst Setup for Input Shunt CPpacltance

Check. . . . . . . . . . . . . . . . . . . 5-4 Teti Setup for DC IsolaHon Che&. . . . . 5-5 Test Setup for Voltmeter Frequency

Response Check ami SenslHvlty Swltch CallbraHon . . . . . . . . . . . . . . . . 5-6

Stdelded Load. . . . . . . , . . . . . . . . 5-7 Tr<lubleeh&-lng Loglc . . . . . . . . . . . 5-13 Lmpedance Converter SchemaHc . . . . . . 6-3 RejecHon Ampllfler SchemaHc. . . . . . . 6-4 Mcterlng Clrcult Diagram . . . . . . . . . 6-S Power Supply Schematlc . . . . . . . . . . 6-6

IV

I Model 3314/332A Sectlon 1

Flp~ro l-l nnd Tnblc l-1

Figure l-l. Malel 331A Mslortion Analyzer

Table l-l. Swctflcatlons

MODEL 331A

DISTORTION MEASUREMENT RANGE: Any fundamental frquency, 5 cps to 600 Kc. I~stortlon levels of 0. 1%100% are meaeured full scale In 7 ranges.

DISTCWI’ION MEASUFtEMENT ACCUFWCY: Har- monlc frequency measurement accuracy:

Funckmental Inplt Less Than 30 v

11

Fundamental Input Greater than 30 v

RANGE *3x +6% *12%

lOO”~O. 3% 10 cps- 10 cps- 10 cpe- F. 8. 300 Kc 500 Kc 3 Mc

I 0.1% F. S. I

Ellmlnation Characteristics: Fundamental Re]ectlon > Kl db Second Harmonic Accuracy for a functamental Of:

5 to 20 cps: better than +l db 20 cps to 20 Kc : better than l O. 6 CR, 20 Kc to 100 Kc : better than -1 db

100 Kc to 300 Kc : better than -2 db 3OOKc to 600 Kc : better than -3 db

Mstortlon Intrûduced by Inetrument: <O. 03% from 5 cpe to 200 Kc <O. 06% from 200 Kc to 600 Kc

Meter tndlcatlon 1s proportlcmal to the average value of a wave form.

FREQUENCY CALIBRATION ACCURACY: Better than &2’$ from 10 cps to 200 K.c Better than -3’.F; from 5 to 10 cps Detter than +S% from 200 to 600 Kc

INPUT IMPEDANCE: Dlstortion Mûde: 1 megohm shunted by less than 60 (*tIO) pf (10 megohms shunted by 1Opf with + 10001A divlder probe). Voltmcter Mode: 1 mcgohm shunted by 30 J# (*So), 110300 v rms; 1 megohm shtmkd by 60 pf (+60), 300 /Iv to 0. 3 v rms. l OPTION: 02

INPUT LEVEL FOR DISTORTION MEASUREMENTS: 0.3 v rms for lOO’$ set leve1 (up to 300 v may be attcnuated to set leve1 referente).

DC ISOLATION: Slgnal grwnd may be i400 vck from externa1 chassls.

VOLTMETER RANGE: 300 pv to 300 v rms ful1 scale (13 ranges) 10 db per range.

VOLTMETER FREQUENCY RANGE: 5cps lo 3 Mc (300 pv range: 20 cps-500 Kc).

VOLTMETER ACCUHACY:

I RANGE 1 *2(X I *5% I 300 pv 30 cps-300 Kc 20 cps-500 Kc

1 mV-30 v 10 cps-1 Mc 5 cps-3 Mc

100 v-300 v 10 cps-300 Kc 5 cps-500 Kc

NOISE MEASUREMENTS: Voltmeter resl&al nolse on the 300 /IY range: <25 /IV rms termlnated In 600 Il; < 30 IJV rms termlrmled w1t.h a shlelded 100 K reslstor.

OUTPUT: Approxlmately 0. 1 v rms output for ful1 scale meter deflactíon. Output Impedance: 2 K

01772-2 l-l

I

sectlon 1 Table l-l (Cont’d)

Model 33 lA/ssaa

Tablc l-l. Speclflcatione (Cont’d)

POWER SUPPLY: 113or 230 +lO%, 50 to 1000 cpn, approxtmately 4 watta. Terminaln are provided for external battery supply. Poaltivc arnl negatlve voltageta ktnecn 28 v and 50 v are required. Current draln from each voltage ie 40 ma

WEIGHT: Net 17-3/4 lbe. (7,98 kg), Shipplng 23 Iba. (lo,35 kg. )

MODEL 332A Same IIB Model 331A cxcept M lndlcded below:

AM DETECTOR: High lmpedance dc restorlng peak detector nlth seml-conductor dIale operates from 500 Kc to greater than 65Mc. Broadband input. Haximum lnput; 4 v p-p ac or 40 v peak tranalenl.

CARIUER FRBQUENCY: 1.6 Mc to 65 Mc: Dlatortion introduced by detector i.0 < 1% for 3 to 8 volt rme carriers modulated 30%

NOTB

Distortlon meaeurement at carrier levels ae low ae 1 volt may be made with reduced accuracp.

OPTION: 01

Micatlngmeter ku3 W cha~cteristics conform- ing to FCC Requiremento for AM, FM, anfl TV broadcaotlng.

CARRIER FFUQUENCY: 550 Kc to 1.6 Mc: Distortion introduced by detector ln <O. 3% for 3 to 8 volt carrlers modula- t-Pd 30%.

OPTION: 02

Rear termínala In parallel

1-a 01772-2 !

Sect Ion 1 Rtragraphs l-l to 1-13 and Table l-l

SCCTION I

GENERAL INFORMATION

l-l DESCRIPTION. 1-6. ACCESSORIES AVAILABLE.

l-2. The Bewlett-Packard Modela 331Aand 332A Dls- tortlonAna$ccrs are eolld state lnstruments for measurlng dietortlon and ac voltagee. The Model 332A lncludes a hlgh lmpedance AM detector whlch operates from 500 Kc to greater than 65 Mc.

1-7. Table l-2 contalns a llst of accessorles avallable to lncrease the usefulness of your Dlstortlon Analyzer.

1-3. Distortion levels of 0.1% to 100% ful1 scale are measured ln seven ranges for any fun&mental frequency of 5 cps to 600 Kc; harmonlcs are lndlcatedup to 3 Mc. The hlgh densltlvlty of these lnãtruments requlres only0.3 v rmsfor the 100% eet leve1 referente. A 1~ dletortlcmoutput leprovldedatthe OUTPUTconneclors for monítorlngwlth an oeclllcacope, a true rms voltmeter, or a wave armlyzer. The Instrumenta areca- pable ofan isolatlon voltage d400volts above clmssls grmd.

1-8. OPTIONS AVAILABLE.

l-9. optlon 01 1s a etanckard ti Malel 331A or 332A wlth a speclal meter and meter ampllfler. compen- aated topermlt response to VU (volume unlts) ckrac- terlstlcs.

l-10. O#lon 02 1s a stanckd ,$J Model 331A or 332A wtth the INPUT termlnals dupllcated onthe rear panel, and connected In parallel wlth the front pancl INPUT terminals. Shunt capcltance Is Increased by 20 pf.

l-4. The translstorlzed voltmeter contalned In the Mc&l 33lAond 332Acan be ueed separately for general-e voltage and galo measurements. Tbe voltmeter has a frequency range of 5 cps to 3 Mc (20 cpsto 500 Kc for 300 pv range)anda voltage range of 300 pv to 300 v rms full scale.

l-ll. INSTRUMENT IDENTIFICATION.

l-5. TheAM detector íncludedln the Model 332A 1s a

1-12. Hewlett-Packard uses a two-aectlon elght-dlglt serlalnumber (000-OOOOO). II the flrst three dlglte of the serlal number on yarr lnstrument do not agree wlth those on the title page of thls manual, change sheets supplledwlth the manualwlll deflne dífíerences between your lnstrument and the 331A and 332A ckscrlbed ln thls manual.

brca&and dc restorlng peab detector conslstlng of a semlcomktor dlode and fllter clrcuit. AM dletortlon ¡&elsaslaraasO.3~canbemeasuredona3vto8v rms carrler modulated 30% In the standard br<xzdcast band, and lower than 1% dlstortion can be measured at the eame leve1 cd the carrler up to 65 Mc.

1-13. Lfan E or G preflxes the serial number, the ln- strumentwas manufacturedln Europe (E for England, G for Germany).

n Table l-2. Accessorlee Avallable ,

I Model No. I Use ! Featurrs

9 lOOOlA Vokage Dlvlder Probe 10 megohm shunted by 10 pf, 1O:l attenuatlon, dc to 30 Mc bandwidth, 2% dlvlslon accuracy, 600 peak lnput volta, 5 nsec rlse-tlme.

01772-a l-3

Modcl 331A;‘332A Secllon II Pnrn~r:cph 2-l Lo 2-13

SCCTION II

INSTALLATION

2-l. INSPECTION.

2-2. Thls lnelrument wns rarcfully lnspected t>olh mechanlcalIy and electrlcally kfore ahipmenl. Il shtrJld be physlcally Iree of mars or scratchcs and In perfcct electrlcal ordcr upon recclpt. To corl[irm 1hl.s. lhc lnstrument Ahrmld I>r 111~l~r.lrd for physlcal

B

ctamage III trnnslt. hlsochcckfor suppllcdacceaflorieR. and test the electrlcal prformance oi lhe lnslrument unlng lhe procedure Mtllned In Scctlon V. II there 1s damahT or dtiflclency, aee the warranly on lhe lnalde

I

rear cover of thls manual.

2-3. POWER REOUIREMENTS.

I

2-4. Thr Model 331A and 332A wlll opcrale from eilher 115 or 230 vac. 50 - 1000 cps. The iuatru- ments can bc eaally convertcd from 115 to 230 volt c~penllon by changlnp lhe posltlon of lhe sllde awltch,

0

lccaledon rear panel, so that the deslgnatlon appcnr- Ing on the mltch matches the nomIna vollngc of the pnwer source. A 11’15 nmpre, alow-hlow IURC 1s used Ior 11%volt operatlon: a 1/32 ampcre sluw-blow fuae la uaetl for 230-volt mratlon. Thc instrumenta

)E

can be baltery operated by connectlnl: lwn2R - 50 v Istterles (ratedñt 40 mlUlam1xxes) to llir bntlery ter- m1nal.a on lhe rear panel

I

2-5. THREE-CONDUCTOR POWER CABLE.

2-8. To prcticcl operallng personnel, lhe N;1llo1~71 El~lrlcalManuIa~turer~’ As~c.~lall~ln (NEMA) rccom-

I

menda that the inslrumenl Ir;lnel am-l cablnel br grmnded. Thle Instrument le equlppcd wlth n threc- conductor power cable wldch. when plugged into an approprlate receptacle. grounda the inslrument. The

1

offset pln on the power cable three-prong connector le the ground wlre.

2-7. To preserve the prc4ecllonfealure when operal-

I

lng the lnatrument from a lwo-conlacl tlutlet. uee a three-prong a&plcr and connect thc green pl~$aIl on thc ac$pter to g-rcnmd

2-8. INSTALLATION.

I 2-9. The 331A and 332A are fully translstorlzed: therelore, IIO speclnl coollng le requlrcd. However.

I

the Instrumenta should nd be oseratea where the amblent lemperature r.xceeds 55 C (131 F).

2-10. RACK,‘BENCII INSTAUTION.

2-11. The 331h and 332A are Inltlally shlpped as bench-type lnstrurnents (unless ordcred speclflcally ns a rack-type) wlth pIastIc feet and a tllt stand In pIace. Converalon lo a rack-mounted lnstrument crin Ile nrcnmplíRhed hy ualng LIIP rark mruntlng klt and Inslrucllons furnlshed wllh ytnlr lnslrumenl.

2-12. REPACKAGING FOR SIIIPMENT.

2-13. Thr followinp 1s a generalgulde for repackaglng for shtpmenl. TI ynu have any questlona, contact yfmr local + Sales and Servlce Office.

NOTE

II lhe lnatrument 1s to Ix. shlpped to Hewlett- Wckard for serrlce or for rrplr, allach a tag lo the tnelru- ment ldcnllfylnglhe owncr and lndlcate lhr scrrlce or repalr lo be ac- compllshed: lnclude the model number andfuIleerlalnumber of the ln- mtrument. III any correspondence, Identlfy thc lnstrumenl by model numbcr, serlal number and serial numbcr preflx.

a. Place lnstrument In orlglnal conlalner lf avallable. LI original contatner 1s not avallable, it can be plrchased from your ncarcst + Salee and Servlce Oflllce.

If orlgllnl contatner 1s not used,

Wrap Inetrument In heavy paper or plastlc before placlng ln an lnner contalner.

URC plenly of packlng materlalaround nll eldes uf Inslrument and protect panel facerr wlth cnrd- bcard slrlps.

Placr Instrumcnt ami lnner contalner In a heavy carton or wooden box and sea1 wlth atrong tape or metal lxmds.

Mark shlppíng contalnrr wlth “Iklicate Inetru- nient”, “Fragtle” etc.

I c I

0 1772-2 2-l

Sectlon III Figure S-1

Model 331A ‘332A

ó 18

1 1 MECHANICAL ZEROADJUST mechanlcally zero- control provldee flne adjust- eets meter prior to turnlng instrument on. ment of FREQUENCY dlnl.

0 12 COARSE BALANCE control provldee coarae adjuatment for balpnclng the Wlen bridge clrcult.

ON ewltchturna lnetrument ac power on. PIlot lamp glowe when lnetrument is turned ON.

3 NORM-RF DET ewltch (Model 332A only) selects front panel INPUT connectors or rearpane! RF INPUT connector.

3 FUNCTION eelector selecta mode of operatlon of the lnetrument.

0 13 FINE BALANCE control provldes a vernler adjustment for balnnclng the Wlen bridge clrcult.

0 14 DISTORTION/VOLTMETER lndlcates dietortlon leve1 and voltage levels of lnput elgnals.

9 SENSITIVITY selector provldes 0 to 50 dbattenu- atlon of lnput slgnal ln 10 db eteps !nSET LEVEL and DISTORTION posltlona of FUNCTION eelector.

9 SEMITMTY VERNIER control provldes fine adjustment of attenuatlon levelselected bySEN- SITIVITY selector.

3 METER RANGE selector selecta ful1 ecale rango of meter ln percentage, db, and rms volta.

9 FREQUENCY RANGE eelector selecta frequency range to correspond to fundamental frequency of lnput 8lgnal.

9 INPUT terminal8 provlde connectlone for lnput elgnall3.

3 10 FRWUENCY dial selecte functamental frequency of lnput slgnal.

0 15 OUTPUT connectore provlde meane of monltor- lng the output of the meter clrcult wlth an os- cllloscope, a true rme voltmeter, or a wave analyzer.

0 18 RF INPUT connector (Model 332A only) provldee lnput connectlon for AM RF carrler lnput elgna!.

0 1’7 LINE VOLTAGE (116V/23OV) swltch sets lnatrument to operPte from 115V or 23OV ac.

0 18 FUSE provldeeprotectlon for lnstrumcnt clrculte

0 10 AC power connector provldee lnput connectlone for ac power.

0 20 BATTERY VOLTAGE (t28 to +50 VDC and -28 to -50 VDC) terminals provide connectlone for externa1 trntterlee.

3-o

Figure 3-l. Front and Rear Panel Descrlptlon

01772-a

Section III Paragraphe 3-l to 3-13

SECTION III

OPERATINO INSTRUCTIONS

P I I I % l I by the instrument: thus, low leve1 harmonic content

In the input slgnal can be measured accurately. The 331A and 332A can be used in conjunction with a wave analyzer for extremely sensitive (> 80 db down in the

I

audlo frequency range) measurements oí oddharmonlcs.

3-4. CONTROLS AND INDICATORS.

1

3-5. Figure 3-l illuetratee and descrlln?a the functlon of al1 front and rear panel controls, connectora. and IndIcatora. The description of each component is keyed to a drawing included withln the fthwre.

I 3-6. ADJUSTMENT OF MECHANICAL ZERO.

3-1. INTRODUCTION.

3-2. The Modela 331.4 aad 332A DtstortionAnalyzers have two mcdes of operation. the distortion mode and the voltmetcr mode. Total harmonic distortion mca- surements from 5 cps to 600 Kc are possible and harmonice are indlcated up to 3 Mc when thc instru-. mente are used in the dlstortion mode. Dietortlon measurement accuracy 1s determined by the ovcrall effect of harmonic Irequency meaeurement accuracy, eliminatlon chrtracterletics, dlstortion introduced by the Instrument, and meter accuracy (refer to Table 1-1, Specificatlons). In the voltmeter mode. the translstorized voltmeter provides a ful1 scale sensltlvity of 300 MV rme (residual noise < 25 pv). The voltmeter frequency range 1s 5 cps to 3 Mc (20 cpe to 500 Kc on the 300 MV range).

3-3. The distortion measurement accuracy oí the 331A and 332A la a result of the sharp eliminatlon characteristic of the retjection amplifier circuit and the low leve1 oí distortion lntroduced by the instrumcnt. The fundamental rejectlon 1s at Icast 80 db. whlch is small compred to the dlstortion lntroduced

I

3-7. The procedure for adjustment of mechanical zero ía given in Sectlon V.

3-8. GENERAL OPERATINO 1 INFORMATION.

c

3-g. INPUT CONNECTIONS.

3-10. A elgnal source can be connectsd to the 331A and 332A through twlsted palr leads or a shlelded cable wlth banana plug connectore. Keep al1 test leads as short as possible to avoldextraneous pickup from stray ac flelds. When measurlng low-lcvpl sig- nale. avoid ground loop currente by connectlng only one instrument in a test eetup directly to power-llne ground through a NEMA (three-prong) connector.

,.Connect al1 other instrumente to the power Bource through a three-prong to two-prnngadapterandleave the pigtaildieconnected. Both the 331A and 332A have a dc Ieolatlon of *400 vdc from the externa1 chassls.

3-11. VOLTMETER CHARACTEFUSTICS.

3-12. The RMS VOLTS mnrklngu on the meter fare are based on the ratlo between the average and effectlve (rms) valuee of a pure sine wave. The ratlo of avrrage to effectlve values in a true elne wave 1s approxlmately 0. fl tu 1. When the meter LS used to mesure complex waves. the voltnge lndlcnted may tmt be the rms value of the q tgnal applled. This de- viation of meter indication exista because the ratlos of ave-e to effectlvs values are usually not the same ln a complex wave ae In a sine wave. The amount of devtatton depende on mngnltudeandphase relatlon between harmonics and fundamental frequency of the elgnal applled. Table 3-l showe the devlatlon of the meter indicntlon of a sine wave partly distorted by hnrmonice. As lndicated in the table. harmonlc content nf lese than approxlmately la reeults ln very ama11 errors.

Table 3-l Effect of Barmonic

Input Vnltñge C’hnractcrlstIcs

Fundamental = 100

Fundamental +l(rk 2nd harmonlc

Fundamental +2fi 2nd harmonlc

Fundamental +5U$ 2nd harmonlc

Fundamental +lm Srd harmonlc

Fundnmerrtal +%Y% 3rd harmonlc

Fundamental +50? 3rd harmonlc

on Voltage 1

Tl-lle iMS Value

100

100.5

102

11a

100.5

102

112

nsuremente

Meter lndlcation

100

100

100 - 102

100 - 110

00 - 104

04 - 108

00 - 116

NOTE

Thls chart 1s unlvereal In appllca- tlon slnce these errore are lnherent ln al1 average-respondlng tppe voltage-meaaeurlng lnstruments.

3-13. In dlstortlon measurements where the Iundamen- tal Irequency le suppreesed and the remalnder of the s&nal la measured, the reading obtained on an average-respondlng meter may deviate from the true total rms value. When residual wave contalns many lnharmonlcally related sinueolds, the maximum error ln the dlstortion readlng is nbout 11% 10~ for dlstortion levele below la.

Measured Máximum Error Total Dlstortion in Meter Indlcatlon Dlstortlon T +o. 11 x 0.025 - 0.025 -l 0.0037 =

0.00027 0.0277 or 2. VS

3-l 01772-l

Section DI 1 Mo&1 33lA/332A , Paragrapba 3-14 to 3-19

Thie example repreeents tbe maximum possible error and in moet codee the error LS leee. In distortloa meaeuremente, the reading of an average-responding meter le sufílcicntly cloue to the rms value to be eatisfactory under moet memurement condltlons.

3-14. USE OF OUTPUT TERMINAL&

d. Connect test leadn from devlce unckr test to INPIJT termlnals.

B

S-16. The OUTPUT terminala provide a 0.1 v rme wtput for ful1 scale meter deflection. Theee tenni- nala can be u~ed to monitor thc cutplt sigual nith an oecilloucope, a truc rms voltmeter, or a wave analyr.er. The combinatlon of thc dlstortion meter andoacilloecopc provides more elgniflcant infonnation abad the dcvlce wzier test thun the exprssslon of dlstortlon magnitude alone. Information obtained from tbe oscfllorcope pattern ia apeciflc and reveala the nature of the diatortlon that sometimes occura at such low lcvelr timt it ia difflcult to detect in the presente of hum and noise. The imp&ance at the OUTPUT termbmla in 2000 ohms, therefore capacltive loada greatsr timn 50 pf should be avoided to main- tain the accuracy of meter readlrtgs.

REHOVE SHORTlNG 6MAP BETWEEN POWER-LINE GROUND (4) AND CHA9818 GROUND (a I-ERMINALB ON FRONT PANELINPUT TERMINALS WHEN MEA- SURlNG DISTORTION BETWEEN TWO POINTS WHICHARE BOTH ABOVE GROUND POTENTlAL

e. PosltionSENStTIVTTY selector for meter indlcatlon greater than 1,‘s ful1 scale.

NOTE

Posltlon SENSITIVITY selector wlth the SENSlTlVlTY VERNIER control turned CCW, taklng ae much attenuatlonaa poa- eiblc with the SENSITIVITY selector.

3-16. OPERATINO PROCEDURES.

3-17. Tbe 33lA and 332A dlatortion analyxera can be operatedfroman ac poaer scurce (115/230 volt) or a dc poner source (ta6 to +50 and -28 to -50 volt source).

f. Adjust SENSITIVlTY VERNIER control for full oc-ale deflection

g. Posttlon FREQUENCY RANGE selector andfre- quenq dial to fundamental frequency of input W-l.

NOTE

NOTE

Lf 28volt dc eourcea are used, the -26 volt power supply may requlre adjustment. Referto Section V Power Sup- ply Adjumtment.

Select a frequency range by the FRE- QUENCY RANGE selector such that the frequency dial con be ueed on the low end of the diaL Thie procedure in- sures maxlmum accuracy in dietortlon meaaurements.

3-16. DTBTORTSON MODE. h Poultlon FU?JCTION selector to DISTORTION.

NOTE

Accuracy of distortion mcanure- ments in affectecl by frequency sta- billty of the input signe& An in- accumq In titortlon indicatloons

.

J. Adjuot METER RANGE selector and frequenq dial vernier control for mínimum meter iIKllcatíon

k Adjuat COARSE ond FINE BALANCE controla for further reductlon of meter Mlcatlon

occura wbere the frequenq drift of the input sigrral exceeda the bami- wldth of the rejectioa curve.

S- 19. DLSTORTION MEASUREMENTS IN PERCENI’.

m. Repeat stepe J and k untll no further reductlcm in meter indlcatlon can be obtalnd.

NOTE

o. Position FLJNCTION selector to SET LEVEL

b. Rotate SENSl’lTVITY selector to HIN poaltlon.

NUI%

The bandwidth of tbe SENSlTfVITY selector is reduced in the two ex- treme CCW poultlonm (poeltionr used wlth an hput slgnal greater ttmn 30 V).

c. Posltion METER RANGE selector to SET LEVEL (100%).

NOTE

Becawe of the high sensitlvity and nar- row rejectlon notch, pressure applled to the top cover may cauw the null to shift. Thb shiít in causedby emall capacltlve changes belmeen the bridge and case. Hoaever, accuracy of reading is not degraded ifpreswre in constant and the bridge is rebalanced.

n. Observe percentage oí dlstortion indicated on meler. Meter Micaklon 1s in conjunction with METER RANGE selector. For examplc, LI * meter indlcates .4 and METER RANGE selector in on 1% posltlon, dinlortlon measured Is 0.4%.

When the in@ signal leve1 is below 0.3 v, poaltion METER FMNGE selector downacale (below 0.3 v poultion) rrad uae thio new pctaitlon aa the 100% set leve1 position, tbuus making the mxtrange 30% etc.

s-2

NOTE

RMS voltage of lnput slgnal belng analyzed for dlstortíon canbe measured by posltioning FUNCTION selector to VOLTMETERpoeltlon.

01772-a

i

Model 33lA/332A

S-20. DISTORTION MEASUREMENTS IN DB.

P 0 a Perform s!cps a through e preceding paragraph

(Dlstortion Mcaeurements ín Perccnt). Adjuet SENSITIVITY VERNIER control for 0 db meter indlcatlon.

b.

C. Perform rtepe g thmugh m in preceding wrrrgwh

d. Observe meter indicatlon for dlstortlon in db.

i 1

NOTE

Dlstortlon in db le obtatned’by alge- bralcally addlng meter indication to DB indlcated hy METER RANGE eelector. For ewmple, if meter lndica~em -2 and METER RANGE selector lm on -20 DBpwition, distortion meaaured Le -22 DB.

3-21. DISTORTION MEASUHEMENTS OF AM RF CARFUERB. (M&l 332A Only)

E

a.. Set NORM - RF DET eelector to RF DET.

b. Connect AM RF carrler elgnal to RF INPUT connector on rear panel of lnetrument.

.’ c. Perform eteps a through c and e through n of DistortlonMeaeurementn InPercent parol[raph.

01772-2

Section III Paragrapha 3-21 to 3-25

d. Refer toprcceding paragraph for distortion in db.

S-22. VOLTMETER MODE.

S-23. The 331A and 332A become general purpose voltmeters when the FUNCTTON selector is eet to VOLTMETER position.

NOTE The SENSITIVITY selector in dis- abled when the FUNCTION selector Is placed ln VOLTMETER positkm.

Perform the followtng stepe wkn maktng meaeurements:

&

b.

C.

d.

voltage

PoeitlonMETER RANGEselector to P range cx- cceding the value of the signa1 to be meamured.

Connect slgnal to INPUT terminals.

Select a METER RANGE to glve a reading ae cloee to full scale aa poselble.

Observe meter Mlcation and METER RANGE selector settlng to obtain elgnal level.

S-24. H-IGH GAJN WLDE BAND AMPLJFLGR-

3-26. The OUTPUT terminala provlde a 0.1 v rms output (for a full ecale meter deflection). This outplt voltage can be monitor4 wlth an oscil- loscope or a true nno voltmeter.

3-3

hIode1 331A 332h

r

.

l I

I l l I I

I , l l

;. . .

; ’ l ’

; I l ’ I l

; I

I I

l ’ l ’ I l- I ’ I 1. l m I I I 1

1- _*

l l 1 l I I

I I I l l

l I , l l 1 l 1 I I I l I I I l l I

I l-

01772- 1

Model 33lA/332A

SECTION IV

Sectlon IV Paragraphs 4-l to 4-12

THEORY OF

4-1. OVERA11 DESCRIPTION.

4-2. Models 331A and 332A Dlstortlon Analyser lnclude an lmpechnce converter clrcult, 0 re]ecttonam- pllfler, a meterlng clrcult, and a bcnaer aupply clrcult. Inaddltlon to these fax circults, the Model 332A contalns M AM detector clrcult. A block dls- grsm of the lnstrumsnt 1s shmn in Ftgure 4-l. Tbe lmpe&nce converter provldes a luw noise input clrcult nlth a hlgh sourcc lmpsdance lndependent of slg- nallmpeckmce placed at tbe ln@ termlnals. The re- jectlua ampllller relects the funamental Irequency dan lnplt signa1 nnd passes the remslning frequency componente on to the meterlng clrcult for measurlng dlstortlon. The meterlng clrcult provldes vlsusl ln- dlcatlons of dlstortlon and voltage levels on the front panel meter Ml. The AM detector clrcult (Mcdel 332A only) detecto the modulatlng signa1 from the RF carrler and fllters any RF components Irom the mtilatlng slgnaibefore lt 1s applled tothe lmpedance converter clrcult.

4-3. BLOCK DIAORAM DESCRIPTION.

4-4. DISTORTION MEASURINC MODE.

4-5. In the distortlon messurlng mode of cperatlon, the input signa1 la applled to the 1mpecBnce converter circult, Assembly A2, through the FUNCTION selector Sl and a one megohm attenustor. The attemtator is a voltage dlvlder network whlch provides 50 dbattenua- llon In 10 db steps. The deslred leve1 of attenuatlon la selected by the HENSITIVITY selector 82. The lm- pedence converter clrcult provldes an lmpedance con- verslon and unlty galn between tbe lnstrument lnplt termhmls and the lrqut of the rejectlonampllfler clrcult, Assembly A3. Ths rejectlon amplifler conslsts of a preampllfler, a Wlen bridge, ond a brl*e ampltfler clrcult. Ths SENSITIVITY VERNIER control, at the lnplt of the preampllfler clrcult, provldes a set levelslgnal to obtaln full scale readlngs on meter Ml for any voltage leve1 at lnput of the lnstrument. Wlth the FUNCTIONselector in the SET LEVEL posltlon, a grcund la applled to the Wlen bridge clrcult to al- lrrw a sl@lreference leve1 to be set up on the meter Ml In themeterlng clrcult. W1t.h the FUNCTION selector lnthe DISTORTION~ltlon, the Wlen brldge la usedas an Merstage ccupllng network between the preampllfler and brldge ampllfler círcults. The Wlen bridge la tuned and balanced to reject the fundamental frequency d the applled lnprt slgrtal. The remainlng frequency componen18 are lasacd on to Ihe IhAgc am- plífier circult and are measured as dlstortlon by the meterlng clrcult. Negatlve feedback from the bridge amplUler to the preampllfler narrows the rejectlon response d the Wlen bridge clrcult. The clutput of the rejectlon ampllfler (1 db galn) la applled to the meterlng clrcult ttumuph the mt-attenuator. The post-attenuator la used to llmit the lnplt slgrrdl leve1 applled to the meterlng clrcuit to 1 mv for full scale

01772-l

OPERATION

deflectlon The meter@ drcult sensltlvlty ts ln- cressed to 300 pv for full scale deflectlon on the 300 pv range. Ths metering drcult provldes a vlsual lndlcatlon of the dlstortlon leve1 ln the input slgnal In additlontothe vlaual lndlcatlon provided by the meter Ml, lhe OUTPUT terminals provtde a meana of moni- torlng the dlstortion wlth an cmcllloscope, a true rms voltmeter, or a wave analyzer.

4-6. DISTORTIONMEA.SUREMENT INAM CARRIERS.

4-7. The Modsl 33aA DlstortlonAnalyeer contalns an AM detector clrcult for measuríng envelope dlstortlon ln AM carrlers. The lnput slgnal ís applled to the lnput of theAM detector circuit where the modulatlng signalis recovered from the RF carrler. The signa1 la then applled to the lmpeckince converter circult through the one megohm attenustor. Ths signa1 then goes through the eame ctrcults previclusly descrltmd In the Dlstortlon Measurlng Mode.

4-8. VOLTMETER MODE.

4-9. In the voltmeter mode of operatlon, the lnput slgtral la applled to the tmpechulce converter clrcult through the 1: 1 and 1OOO:l attsnuator. The 1:l attenuatlon ratlo la usedln the . OO03 to . 3 VOLTSposl- tlon of the METER RANGE selector SS and the 1OOO:l . atterruatlon ratlo la used ln the 1 to 300 VOLTS pwl- tlcns. Wlth the FUNCTION selector In the VOLT- METER mltlon, the outplt cd the lmpeckuxe converter bypasses the rejectlon ampltiler and la applled to the meterlng clrcult thrcqh the post-attenuator and METER RANGE selector. In the voltmeter moda metering clrcult sensltlvlty la increased from 1 mv forfullscaledeflectlonto 300 pv onthe 300 pvrange, the mme as itwas in the dlstortlon mods d operatlon. The functlon d tho post-attenuator and meterlng circult la the same for the voltmeter mode asfor the dlstortlon mode.

4-10. SCHEMATIC THEORY.

4-11. IMPEDANCE CON-VERTER CIRCUIT.

4-12. The lnput slgnal to the dlstortlon analyzsr ts applled to the lmpedance converter clrcult (refer to Figure 6-l) throughthe 1: 1 and 1000: 1 attenuator SSR12 ln the voltmeter mode d operatlon and through the one megohm attenuator S2Rl through S2R6 In the dlstortlon mode of operatlon. Capacltlve dlvlders act ln co~~ju~atlot~ wllh the altcnuators to keep the frequency responseflat. The lmpeckmce converter le a lowdls- tortlon, hlgh In@ lmpedance ampltfler clrcult wlth gatn tndependent 01 the s<xlrce ImpectPnce placed at the MPUT termlnals. Mstortlon oí the slgnal belng medsured la prevented by keeplng the lnput lmpedance and the galn d the lmpe&nce converter linear. The lnput lmpe&nce is made llnesr by %oot strapplng? the protectlon dlodes A2CR2 and A2CR3 and the gate

4-l

Sectlon IV Paragraphe 4- 13 to 4- 18 and Figure 4-2

todrain capcltance of A2Ql w!th local posltlve feedback. By keeplng the Input Impedance linear, elgrmle havlng a hlgh acurcc !mpe&nce can be mearmred accurately and the SENSITNITY selector S2 can be ueed In the h!gh Impecànce mltlons wlthout dlstortlng the 111plt slgnal. In addltlon to havlng a hlgh lnput Im- pedante, the Impecktnce converter servea aa a linear ampl!.fier. The open loop galn of the clrcult le In- creased by “boom strapplng” lhe collector load lm- pedantes of A2Q2 and A2Q3 wlth local posltive feedback. Overa11 negatlve feedback from the emtttcr clrcult of A2Q4 tothe aource of A2Ql resulte ln unlty galn from the lmpedance converter clrcult and keepe Ihe dlstortlon genernted by the clrcult well wlthin th,e spcclflcatlons llsted ln Table l-l.

4-13. The blae polnte of the translstore !n the lmpedance converter clrcujt have been selected for optlmum dlstortlon performance. The voltage at teet polnt TPI 1s set for optlmum dlstortlon performance for each Indlvldual lnstrument and should not be chan@ from the set value unlese the fleld elfect tranelstor A2Ql la re!&aced. The fleld effect tranaletor, uaed In the lmpe&nce converter clrcull, provtdee an extremely lw nolse performance clrcult lndependent of the e!g- nal sclurce Impedance and al& In produclng the h!gh lm@ance Inpt to the lmpednce converter clrcult.

4-14. REJECTION AMPLIFIER CIRCUIT.

4-15. Thc rejectlon amplüler clrcult (refer to F!g- urc 6-2) consiste of tbe preamplU!er A3Ql through A3Q3, !he Wlen bridge clrcult, and the bridge amplifler A3Q4 throurrh A3Q0.

4-18. PREAMPLIRER CIRCUlT. The signa1 cmpled from the lmptince converter clrcult 1s appbed to the

- preampllfler ctrcultwhlchls oper¿tlonalln the SET LEVEL and DISTORTION modes of operatton. Nega- tlve fecdback from the junctlon of ASRlO and A3Rll 1s applled to the junctlon of A3R2 and A3C2 to eetabllsh the operatlnl(po!nl forA3Ql. Negallvc feedback frorn thc emltter of A3Q3 1s nppl!ed to the emltter of A3Ql

Mo&1 33lA/332A

to stablllee the whole preamplüler clrcult. The pre- ampllller clrcult,ltbthe lmpedance converter clrcuit, 1s dee!gned Ior hlgh cqen loop gain to lneure maxlmum dlstortlon performance.

4-17. WIEN BRIDGE CIRCUfT. TheWlenbrldge clrcult 1s used, In the dletortlon modc of oper&t!on, aa a rejectlonfllter for tbe func$mental frequency of tbe Input elgnal. Wlth the FUNCTION selector 91 In tbe DISTORTION posltlon, the Wlen bridge la connected ae an lnleratage cmpllng network betwsen the preampllfler clrcult and the bridge ampllfler clrcult. The bridge 1s tuned to the funcipmental frequency d the lnput s!gnal by varylng the frequency tunlng capa- cltors C4A thr<lugh C4Dafter the FREQUENCY RANGE eelector 54 la eet for the appllcnble frequencp finge. Tbe bridge clrcult le brought.!ntobalance by adJuetlng the COARSE RALANCE control R4 and tbe FINE BALANCE control R5. When the bridge clrcult le tuned and tulanced, the voltage and phase d hm&a- mental, ahtch appears at junctlon of the serles reactive arm (S4Rl-S4RlO and CIA/B and the ‘shunt reactlve arm IS4Rll-S4R20 andC4C ) D), le the aame ae at the mldpolnt of tbe resletlve branch (A3R12 and A3R14). When these two voltages are e&al and are tn plmee, no outprt ~1~1 wfll appear at the draln of the fleld effect tranalator ASQ4.. For frequenclea other than the fundamental, the reactive branch of the Wlen brldge offers varlous deveee of attenuatlon and phaae shlft. The dlfference voltagebetween the reactlve branch and resietlve branch 1s amplUled by A3Q4. Figure 4-2 Illuetrates a typlcal Wlen brlc&e clrcult and the rejectlon ctmracterlstlc for thls clrcult. The Wien brldge ctrcuit le deelgned to cover a conttnu<rus frequency range d 12 to 1 to lneure an overlap of the ccnrse tunlng range. Ccarse tunlngrangcsare eelected by the FREQUENCY RANGE selector 54 whlch changes the bridge circult con&ants !n flve decade steps.

4-18. When the FUNCTION aelector la settothe VOLT- METER or SET LEVEL posltlon, the junctlon oí the serles and shunt reactive arm d the Wten bridge iB

connectedLoclrcu!tgroundthroughS1BFwhlchdisablea

-o E OUT o

..Y TYPICAL WIEN BRIDGE

3 I k.

ti F

: d,

2 i. d .1 . . e

u

4-2 Figure 4-2. Wien Bridpe Clrcult and Rejection Chararteristics 01772-l

I ‘\

Ib

8 . . ll

Model 331A/332A

the frequency rejection characteristic of the bridge drcuit. Wlth the bridge c!rcu!t dtsabled, the rejectlon ampllfier clrcuit provides one db of gain for the functamental frequency, the harmcmics, andfor the reelduals to establish the set levelreference hr theSET LEVEL mode of operation. 4-19. BRIDGE AMPUFIEX CIRCUfT. The bridge aniphfler circult consiete of three stages of anipl!f!- cat!on,A3Q4 thrcugh A3Q6. The first stage d amplt- flcation A3Q4 !saf!eldeffecttrans!etor wh!champlif!es the dlfference signa1 between the gate and the scIIIrce. The field effect transistor 1s selected for maximum nolse performance with the hlgh lmpectances of the Wten bridge circuit. The signa1 from the draln 1s app!!ed to the two stag feedback amphfler A3Q5 ond A3Q8. The b!ae pc&ent!al at test pint TP2 ta set for max!mum d!stort!on performance for each indlvldual instrument and should not be changcd from the setvalue unlessthefleld effect tranststor h3Q4 la rc- placed. The outplt of A3Q8 la coupled to the meter circult througb the post attenuator S3Rl thr<ugh S3Rll. Negative fesdback from the output of the bridge ampl.!f!er le appl!ed to the preampltfler circult to nar- rowthefrequency rejectlon characteristlc. It can be noted from the rejection clmrncter!st!c (refer to Fig- ure4-2) for the brtdge that the rejection al harmonic voltages le not constant. Typically the second itar- monlc le attemrated severa1 db more than the third barmonlc and the thtrd more thanthe fourth. Thc result of the negative fe-k 1s illustrated by the rejection characterietic shown in ctashed lines on the amphtude and pbase c!mracter!stic of Figure 4-2. Refer to Figure 4-%Randwi&h versus N-uU Depth for further detall on the rejectlon characterlstic. Fiy- ure 4-4 ehows a s!mpl!f!ed block d!agram of the rejection ampl!f!er wlth the typical frequency-rejectlon ctmfncteriatic.

I-20. METER CIRCUIT.

4-21. The meter clrcuit (refer to F!gure 8-3) consists of thepost attenuator, the meter amplificr circuit, and the meter rectifier circuit. 4-22. Poãr ATTENUATCR. The post attenuator,KiRl through S3RlLls a series of resietor networks which provide attenuation d input etgrmls !.n 10 db steps. The attenuator le ueed tn conjunction with elther the input sensitlvity attenuator or the 1000: 1 attenuator to limlt the s!grml leve1 to the meter ampl!f!er to 1 mv for fullscaledeflection on allranges from 1 MV to 300 V fullscals. The meter clrcuit senslttvlty le increased to 300 PV for ful1 scale deflectlon on the 300 p V range by swltching resistora A2R29 and A2R30 into the callbration network Reslstor A2R41 andcapadtor A2C29 are also switched into the callbration nehvork cm the 300 !JV rsnge to extend the passband d the ampl!f!er.

4-23. METER AMPLJFIER CIRCUIT. The meter am- p!!f!er clrcult consiete of a flve stage ampltfier circuit, A2Q5 through A2QBwhlch develops the current forfull scale meter deflectlon. Negative dc feedback from the emltter clrcult of A2Q8 1s appl!ed Lo the hase d A2Q5 to staW!zethe dc cperating point d the meter ampllfler circult and to mintmlze the tenciency for dc dr!ft dueto amblent temperature clmnges. Nega- tlve ac feedback le applied from the collector clrcuit ’ of A2QQ tothe emltter clrcult of A2Q5. Thls feedback íe used to lnsure a flat frequency response, to lm-

01772-l

SPctlnn 1v Pnrngrnphs 4-19 11) 4-31

prove llneartty. and to reduce the effect of variation of transistor parameters wlth environmental changes. In this manner, the calibration of the lnstrument le made dependent on high quallty passive componenta.

4-24. METER RECTIFIER CIRCUIT. The meter rectiflcr IR connectrd In a bridge type of cmfigurntion wtthadtode tn cachupprr arm and a dc millinmmeter connected across thc mtdpolnts of the bridge. The simpltfted meter rertiftcr is illustrated In Figure 4-5. The generntor repreeented by A2Q5-AZQQ with the interna1 iml>e&nce R ,

¿ provider the meter hll wlth

current for ful1 scale eflcrtion and derelops a voltage ncrows the calihration network nhirh closes thr ar feedback 1~. CnpacitorsA2C27and A2CZP are used ae cmpllng capacitora for thc ñr feedbarkloopnnd the output s!gnaltothe OUTPUT connector. Thc mechanlcal inertla of the meter prevents the meter from respondtng to !nd!v!dual current pulses, therefore the meter polnter reading correspllnds tc~theavrmge value of the current pulses rathrr than the peak value. The meter caltbratlon la to the rms value of a sine wave. Reslstor A2R45 tmpresacs a Iixrd blas ucross diodes A2CR8 and A2CR7 (biasing them closc to the conlnct pc&ent!al) to make the meter circuit response linear to lorge varlatlons In sig~ral amplitude. The linearity of this type nf clrcult ts also increased hy cnclosing the meter clrcult In the overa11 feedback loop.

4-25. POWER SUPPLY CIRCUIT.

4-26. The power supply circuit (refcr lo Flqre O-4) coneists of a +25 volt series regulated supply and a -25 volt series regulated supply which is thr relcrencr supply for the I 25 volt supply.

4-27. The -25 volt regulated supply 1s of the convcn- tlonal serles regulator type. Thc amplifier AlQ5 IR used lo increase the loop gal11 of the clrcuit, thus im- provlng voltage regulation. The positlve Ieetilxxk applled to the junctlon of Al111 1 nnd AlR12 1s used lo further improve the llne frequency suppression of thc ctrcutt.

4-28. The t25 volt rc!gu!ated supply 1s of the conven- tlonal series [email protected](Jr type and operates the same as the -25 volt regulated supply.

4-29. Dlodes AlCR5 and A lCRf3 are cnupllng and protectlon dlodes for externa1 battery supplles. The dtcdes protect the series regulator circuits from ap- pllcatlon of Incorrect polarlty al the battery input terminals. The dtodes also protect externa1 bat- terles from belng charged in the wrong dlrectinn when the ac poner 1s being used wlth hattcrles connected to the battery terminals.

4-30. RF DETECTOR CIRCUIT (332A ONLY).

4-31. The RF detector circuit consiats nf a rectiflcr A4CRl andfllter clrcult shown on thc schematic dia&Tam of Figure 6-l. The RF signa1 1s applled to thc circuit through the RF INFJUT connector on the rear panel. The recllfler diodeA4CRl recovers the modulatlng signa1 from the RF carrler and the Iilter circult removes any RF components hefore the signa1 1s applled to the Impedance converter circult through the NORM-RF DET swltch S7.

4-3

Section lV Figure 4-3

Mockl 331A 332A

PERiENT BANDWlDTH

t .002x

.001X

0 -10

At APPROXIMTE PERCENT BANDWñ)TH= ‘iõ X DO

Ill., IU.-“0

-20 -30 -40

DEPTH OF NULL, DB

-0 -60 -70

.

.

c i I 4-4

Figure 4-3. Bandwldth versus Null Depth

01772- 1 I

Model 33lA/33¿?A Section IV Figures 4-4 to 4-5

Figure 4-4. Rejection Amplifier Block Diagram and Typical Frequency Rejection Characteristic

A2R45 I

A2R33

A2R32 A2R 34

v

40&fps

A2R35

, 331A/332A-8-0068

Figure 4- 5. Simplifíed Metering Circuit

01772-2 4-5

sectton v Table 5-l

Yfxkl 33lA,“332A

Table S-l. Test Equlpment Requtred

‘;

d

L

INSIRUMENT REQUIRED CMRACTERISTLCS USE RECOMMENDED

TYPE MODEL

Voltmeter CalI- ACVoltageRange: 300/lvt0300v Performance Chech @ Model 738BR Volt- brntor rme meter Callbrator

Frequency Re- Frequency Range: 5 epa to 5 Mc Performancc Checka @ Mcdel739AR Fre- oponse Teet Adfustment and Call- quency Rcsponee Test Set bratton Procetirc Set wtth ‘+ ModelZCQSR

Osctllator

Te& ticillator Frequency Ffnnge: 10 epa to 3 Mc PerformPncs Checka !@ Model 651A Test Cb- Aqutiment and Call- clllator

bratlon Prcceckre

Wnve Anmlymr Frequency: 1 Kc Performance Checkn @ Model 302A Wave Range: 6odh Amlyzer

Electronlc FuncttoM: parí* 1 aec. gate Performance Checka $ Model 5532.A Elec- Ccurtter Accuracy: 0.28 tronic Camter

DC Voltmeter Voltage Range: l 25 vdc AdJustment and Call- 1.9 Model412A DC Accuracy: kl. O’$ F. S. bratton Procedure Vacuum Tube Voltmeter

Functicll Frequency Ftange: 5 cpu to 5 Kc Pcrformance Cheche + Mo&1 203A Vartable Generator Dtotortim: <64 cb Phase Functlon Geneta-

Outprt System: Ilaotlng ground tor

FlYsr Ftltered (Mputs: 5 cpe, 5 Kc, PW Kc, Performunce Checka Whlte Ltutrumenl Lab 600 Kc Morle 2840 Flltcr

(Mput Dtstortton: <SO db

Poner Supply Chtput Voltage: 3400 vdc Performance Checka f Model 711A Poner SUPPlY

Stggnal Generntor Carrter Frequency: 1 Hc a/external Performance Checks ma.hthh cpppbulty (Makl332A only)

‘+ Modcl 606A Slgnal Generattrr

CapPcltance Meter

RaIlge: o-tlopf Performance Check Tektronlx Type 130, L - C Meter

Vartabfe Ltne Voltage Rawe: 103 - 128 vac TraMformer Power CapPbílity: 4 watts

Performance Checka Suprlor Typ VCIM

Shlelded Load

Shlelded Lond

Reeietor

Restatmce: 600 ohms Performance Checks Sec Figure 5-7

Reetatance: 100 K ohms Performance Checks See Figure S-7

Resletance: 100 K ohms *l. 0’6 ftxed Performance Checks’ + Part No. 0727-0208 carbon film

Wattage: 1/2 watt

Resletor ResistPnce: 300 ohms +l. 0% flxed carbcm film

Wattage: 1/2 watt

Performance Checka C pìrt No. 0727-0065

Reetator Realetance: 600 ohme kl. 0% ftxed carbon film

Wattage: 1/2 ratt

Performancc Checks ,+ Part No. 0727-0081

d I; L

*

L

. i

5-o 01772-a

bldel 33u/332A Sectlon V Pnragraphs 5-1 to 6-9 and Figure 5-1

SECTION V

MAINTENANCE

5-1. INTRODUCTION.

S-2. This wctlon contalnr maMenance Md servlce lnformatlonIorthe33lAand332ADLstortlonAnalyzers. Included PrePerfonnance Checka, Adjustmcnt and Cal- lbrntlm Procedures and Troubleshootlng Techniques. 5-3. TEST EOUIPMENT REOUIRED.

6-4. Test equlpment used In the callbratlon of the 331Aand 332A io glven In Table S-1, Teet Equlpment Requlnd. This table Ilata the type of equlpment to beused. requlred characterlstlcs. and recommendcd commerclally avatIable test equlpment. 5-5. PERFORMANCE CHECKS.

5-6. The Perforrnance Chechs are In-cablnet procedures that can be uaed lo verify lnetrument perform- ante. Tbeee procedures can be used for perlodlr molntenance, to cbeck speclflcatlone after a repalr or for 1ncomin.g quallty control fnapectlon.

6-7. PerformanceChecbs for both the 331A and 332A are provlded and the headlng of each paragraph indlcates whether the procedure 1s appllcable to one or to Mb lnatruments.

5-8. The Performance Checka are performed wlth the ac poner cord connected to nominal llne voltage (115 vi230 v) 50 tu 1000 cps. unleee otherwiee speclfied.

5-9. FUNDAMENTAL REJECTION CIIECK (33lAL- dar.--- -.----_----_-__---_ ---- -- -

a. Connect 331A/332A a.a shonn ln Figure 5-l.

b. Set Dlatorthm Analyzer controlo BB follows: F’UNCT’ION Selector . . . . . . VOLTMETER METER FM.NGE Selector. . . . 1 VOLT FRgQUENCY RANGE Selector X100 Frequency Dlal. . . . . . . . . 10

c. Set Tesl Oscillator (7 Model 05lA) frequenry to 1 Kc and adjunt amplltude for lndlcatlon of 1.0 volt on Dlatortlon Analpeer meter.

6 Swltch Dlstorllon Analyzer FUNCTION to SET LEVEL. SwltchMETER RANGE to 0.3 VOLTS. Adjust BENEITIVITY controlo for ful1 #cale meter lndicntlon.

e. Set Wnve Analyzcr controls (+ Model 302A) an Iollowe:

SCALE VALUE . . . . . . * . . . RELATIVE MAXINPUT VOLTAGE. . * . . . . 1 MGE . . . . . . . . . . . . . .O JJECmEu MODE SELECTOR . * . . . . . . NORMAL

1. Adjuet Wave Analyzer FREQUENCY controls for maxlmum meter readlng (approxlmately 1 Kc).

g. Adjust Wave Analyter REF ADJUBT Ior 0 db meter lndlcatlon.

NOTE

II tlw range of the REF ADJUST control le Insufflclent to set meter to 0 db referente, adjust the Dietortlon Analyeer SEZNffITIVfTY VERNIER control sllghtly to set referente.

h. Swltch DLstortlon Analyzer FUNCTION to DIE- TORTION. Adjuet BALANCE controls and FRFQUENCY dial for null lndlcatlon on Dls- tortlon Analyzer meter. Reduce Distortion Analyzer METER RANGE selector eetting PB neceseary to malntaln deflectlon on meter scale.

j, After achlevlng null lndlcatlon on Dletortlon Analyzer meter, observe Wave Analyzer meter and contlnue to adjuat for a null lndlcatlon. Re- duce Wave Analyzer RANGE settlngae necesspry to malntaln deflectlon on meter scale.

N(JTE

Tbe Díutortlon Analyzer OUTPUT Is a 0 to 0. 1 volt elgnal repreeentlng a percentage of ful1 scale, regardless

WAVE ANALYZER +302A

TEST OSCLLATOH

01772-2

Figure 5-I. Teet Setup for Fundamental Rejection Check

5-1

: sectlon v paragrapha S-10 to 6-11 mu-l Tablc S-2 ar~I Figure 5-2

of RANGE settlnng. Each decreose of the FUNGE uwítch represente 10 db fundnmental rejcction. Thercforc, the tckal fundnmental rcjection la the sum of the Wave Analyaer reodirg rnd the SSlA/SSZA Mlcatioh

Lr The Dtmtortbn Analyxer METER RANOE settlng plus the Wave Analyser RANGE settlng plus thc two meter Mlcatlons shaLl totnl more than -80 db.

Model SSl&~SSZA

S-10. BECOND HARbIONICACCURACYCBECK(33lA/ 33m-

--

a. Connect Test Oeclllator (lf Idc&1 65lA) SO0 0 outplt toDl&ortlonAnalycer INPUT termlnak

b. Set Distortlon Analyz-er controla aa follows:

FUNCTION Selector . . . . . . . 8ET LEVEL FRlZ&JZNCY RANGE Selector . . X1 FrequencyDlal.~~~..~~.~ 20 METER RANGE Selector. . . . . 0 DB

S-ll. DIf3I’ORTION INTRODUCED BY LNSTRUMENT c-rs3rrr7jsãA1:-- -----_ --_--- --.. -- -- ---_----

c. &tTest Om9.llator controla ($ Hodel 6SlA) M folloas:

FREQUENCY RANGE . . . ’ . . . X10 FRãQUENCYDtal.. *. . . . . . 2 OUTPUT ATTENUATOR . . . - . 1.0 VOLT8 mpfJTUf)E. . . . . . . . . * . . 1 Volt

a. Connect 33U~332A M shonn In Flgure S-2.

b. Set Distortlon Analyzer controla PI follows:

FUNCIION Yelector . * * * . * SET LEVEL SENt?fTfVITY Selector * * * m * Poaltlon 5 (1

step ccw from MAX. )

d. AdJuat Dlmtortion Analyz.er SENEfTfVITY controla for a meter readlng of 0 db.

l . SwltchDimtortlonAnalyzer FUNCTION selector to DLSTORTION. Adjuet Frequency dl.al and BALANCE controla for a null indlcatlon on meter.

SENSfTfVITY VERNIERControl ful1 CCW METER RANCIE Selector * * . * 0 db FREQUENCY MGE Selector * X1 Frequency Dial m * * . * . * . . 6

c. &t FunctlonGcnerator controlo (k Hodtl 203A) M follows:

t BwltchDLstortlonAnalyzer F’UNCTION selector to SET LEVEL.

FREQUENCY MULTlPLIER . . X. 1 FREQUENCY Dial . . . . . . . 50

d. Set Filter Whlte Instrument Lab ModeLaMU aa follows:

FFtEQUENCY . . . . . . . . . . 5 CPS

g. AdJust Test Oscillator frequency to 40 epa. Ad- e. Mjust Functlon Generalor RE FERENCE PHASE just AMPLITUDE control for a 0 db lndlcatlon m AMPLITUDE control for an indlcatlon of +2

db on the Dletortlon Anolyzer meter. on the Distortlon Analyzer meter.

h. SwltchDlstortlonAnalyzer FUNCTION selector to DIETORTION. The meter readlng shall not cbmge more than tO.6 db.

j. Repeat steps a thrcugh h at the frequency set- tlngr lndlcaled in Table S-2. The meter read- lngn shall change wlthln the limlts speclfied.

Table 6-2. Second Harmontc Accuracy Check

VARIABLE PHASE FUNCTION OENERATOR

@ 203A

TEST OSCILLATOR I

@65lA I I

FILTER SET WHITE 2640 $334A/332A

Figure S-2. Test Setup for Dlstortion fntroduced by Lnstrument Check

s-z 01772-Z

Model 33lA/332A Sectlon V

‘\.* . . . . .

Paragra@ 5-12 and Table ö-3 and Figure S-3

From 200 Kc tu oo0 Kr the din1 may be PO muchas 8% hlgh. Consequently, P low frequency readlw at null would indlcatc tm the dial in rrading hígh.

b. Set Dlstortlon Analyzer controla ao Iollows:

FUNCTION Selector . * . * . * . SET LEVEL METER RANGE Selector. . . . . 0 DB SENSITIYITY Selector * * * * . * MM. FRFQUENCY RANGE Selector * * X1 Frequency Dlal . * * . . . . . * . 5

c. Set Trst Oscillator controla (J$ Mcuiel 203A) an follown:

FREQUENCY RANGE. * . . . . . X1 FREQUENCYDIAL.......~ 5 OUTPUT ATTENUATOR * . . . . 1.0 VOLT5

d. Set Elcctronlc Counter controlr (-4 Yodo1 5532A) aa followae:

SENWTIVITY . . . . . .3 VOLTS RMS Function Switch. . . . 1 PERIOD AVERAGED DISPLAY....... FullCCW

e. Adjuet Test Oscillator AMPLJTUDE control for a ful1 scalc indlcatlon on the Dlstortlon Myzer meter.

f. SwltchDietortlonAnalyzer FUNCTION selector lo DISTORTION.

g. Adjuet Teat Oscfllator FFUZQTJENCYDIAL for a null Mlcallon on the Dlstortlon Analyzer meter. (lf readtng ta In lower 1’3 0I meter scale, decrease METER FMNGE selector eettlng. )

h. Adjuet Dletortion Analyzer BALANCE controla for a null indicatlon on the meter. Repeat steps g and h untll a null in reached.

J. The Electronlc Counter shall lndicate thc pericd of 5 cps -3%. L e. 194 to 200 msec.

k Repeat stepe a through h wlth controls set an lndlcated in Table 6-4. The Electro& Ccnmter ehall indlcate the Test Oscillator cutput fre- quencles wlthln the limite indlcated.

f. SwltchDletortlon Analyxpr FUNCTION nplrclor to DLSTORTION. Adjust Frequcncy Dial and BALANCE controla for a null meter indlcatlon (If readlng 1s In lower 113 of meter scale, decrease METER RANGE selector settlng. )

g. The meter tilcPtlon at “null” shall be at leant -8 db on the -60 db METER RANGE whlch ln equlvalent to -70 db.

h Repeat stepe a through g with controle set aa lruilcated 1nTable 5-3. Dletortlon shall be down from the referente leve1 pB Indlcated.

Table 5-3. DiatortlonIntralucedby Inetrument Check

BOURCE RLTER BOX

5cF4 5cW ( 4 203A)

5 Kc 5Kc t-f 203A)

60 Kc 5OKc (4 203A)

250 Kc 25OKc (4 651A)

MIO Kc 600 Kc (7 651A)

t;REu. UNGE

x1

x100

X10 K

X10 K

X10 K

F 1

1

m. DIAL

5

60

5

25

60

1

l

IIBTORTION

‘-70 db

b-70 db

ì-70 db

‘. -64 dh

:.-64 db

5- 12. FREQUENCY CALIBRATION ACCURACY il~~~~~73szarr-------- - ----- ------ --..-- -- ----

a. Connect 331A.‘332A an shown ln FLgxe 5-3.

NOTE

From 5 cpe lo 10 cpe the FREQUENCY dtal may be aa much aa 3% low. Inthl# teet thedlal Is held ccmBtanf, andthe In- put frequency Is varled andmonltored. Ifthedlal is low, the input frequency at null wfllbe high. If the perlod of the input frequency ia meaaured. tt wffl be low shen the dtal la low.

TEST OSCILLATOR + 65lA

II - II

ELECTRONIC COUNTER j 5532A

VARIABLE PI-LASE

FUNCTION (KNERATTOR

e 203A + 33lA/332A

DISTORTION ANALIZER

FYgure 5-S. Test kietup lar rrequency c;pImraUon Accuracy LWTK

sect1on v Model331A/33U ppragraphu 5-13 to 5-14 nnd Table 5-4 and Flgure 5-4

Table 5-4. Frequency Callbratlon Accuracy Check

33lA,'332A 203A or 65U 55326

FRGQ. FRGQ. FREQ. FREQ. FUNCTION RANGE DIAL RANGE DIAL SWITCII READINC

X1 5 Xl(203A) 5 1 per avg. 194 to 200 ms x1 20 X1 @OSA) 20 1 per avg. 49 to 51 ms X10 K 20 X100 K (651A) 2 1 SEC. 196 K to 204 K X10 K 60 X100 K (6SlA) 0 1 SEC. 552 K to 600 K

5-13. INPUT RESISTANCE CHECK (33IA:332A).

P. Connect Teãt O~clIlator (9 Model651A) 600 Ll attput toDletortlon Analyxer INPUT termlnale.

b. Set Dlatortlon Analyzer controla aa follaars:

FUNCTION Selector. . . . . . VOLTMETER SENSITIVITY Selector . . . . MAX. SENSITIVITYVERNIER Control WN. METER RANGE Selector . . . 1 VOLTS

c. Set Test Oscillator controla a8 follc~s:

FREQUENCY RANGE. . . . . x10 FREQUENCY DlaL . . . . . . 10 OUTPUT ATTENUATOR . . . 1.0 VOLTS

d. Adjust Teet Osclllalor AMPLITUDE control for an lndlcatlon d 1.0 volts (Ell,,) rma on lhe Dlstortlon Analyzer meter.

e. Connect alOOKG(R ) l l.O%, 1/2ratt, flxedcar- bon Illm reslstor lnaaerles wlth the Dlstortlorl Attalyzer INPUT. Nc4e the Dlstortlon Analyser meter readlng @J.

f. Calculatethe DletortlonArralyzer tnput reelatauce uslng the foltitng formula:

g. The ínplt reeletance shall be 1 M R +5x

h. Swltch FUNCTION selector to Dlstortlcm and calculate the lnplt resltance ln thls Fltlou. Itshallbe1MD*5~

5-14. INPUT SHUNT CAPACITANCE CHECK (331A’

332A).

a.

b.

C.

d.

e.

I.

h.

Set Mslortton Analyzer controla aa followe:

FUNCTION Selector. . . . . . VOLTMETER METER RANGE Selector . . . 1 VOLTS

Sel L - C Meter controle (Teklronlx Type 130) aa follme:

RANGE SELECTOR. . . . . . 30 JI \J F

Adjust L - C Meter COARSE ZERO sud FINE ZERO controla Ior eero meter lndlcatlon.

Connect 331A/‘332A aa shown In Figure 5-4.

The L - C Meter ehall lndlcate leas than 30 ~1~1 F.

Swttch L - C Meter RANGE SELECTOR to 100 pp F. Repeat steps c and d wlth the Dlstortlon Analyzer on the .3 VOLTS range. The L - C Meter shall lndlcate less than 00 /III F.

Set Dlslortlnn Analyxrr controla as Iollows:

FUNCTION &lector. . . . . . DISTORTION SENSITIVITY Selector . . . . MN. METER RANGE Selector . . . -3 VOLTS

Repeat steps c and d al ench SENSITIVITY selector setting. The L - C Meter shall Indl- cate less lhan 60 11~ Fon each oI theee settlngs.

L-C METER TEKTROHX TYPE 130

4933w332A OlSlMTK)N ANALYZER

rr

Figure 5-4. Test Setup Ior In@ Shunt Capclbnce Check

01772-a

hIodel 33lA/332A Section V Paragraphs 5-15 to 5-17 and Figure 5-5

Set Poner Supply controlr (F Mc&l 71lA) ao follame:

AC VOLTAGE. . . . . . . . . ON w: VOLTAGE. . . . . . . . . OFF DCVOLTSADJ.. . . . . . . 400 VOLT8

Set Function Generator controlo (9 Mcdel203.A) aa follows: FREQUENCY MULTIPLIER . 100 FREQUENCY DIAL. . . . . . 10

hdjust Functlon Generator RE FERENCE PHASE - AMPLITUDE control for an lndlcntlon of . 9 on the Distortlon Analyzer meter.

Swltch the Power Supply DC VOLTACE ewltch to ON. Tbere etmll be no citange ln the lndica- tlon on the Dlstortlon Analyzer meter.

Deprees the Powsr Supply 10 MA FULL SCALE button. There shall be no indlcatlon on the Power Supply Ammeter.

VOLTMETER ACCURACY CHECK (931A/332A).

Connect Voltmeter Callbrator # Model 738BR) to Metortlon Analyzer INPUT termlnalm. Re- move shortlng tar between poner line gramd and clrcult grcund termlnaln.

Set Dlstortlon Analyzer controle aa followe:

FUNCTION Selector. . . . . . VOLTMETER

Set Voltmeter Callbrator controle ao followe: OUTPUT SELECTa. . . . . 400 - RMS

5-15. MINIMUM INPUT LEVEL CHECK (33lA,‘332A).

P. Connect Teet Oeclllntor (9 Model 651A) 600 R cutput toMstort1on Analyzer INPUT tcrmlrrnla. Termlnate Test Oaclllator wlth 600 R al. O’$, 1/2 watt reslotor.

b. Set Dlstortlon ArrPlyser controle ae followo: FUNCTION Selector. . . . . . VOLTMETER METER RANGE Selector . . . 3 VOLTS SENSITIVITY Selector . . . . kIN.

c. Set Test Oscillator ctirols ae followe: FREQUENCY RANGE. . . . . x10 FREQUENCY DlaL . . . . . . 2 OUTPUT ATTENUATOR . . . 1.0 VOLTS

d. Adjust Temt Oeclllator AMPLJTUDE controlfor P Mot+on Analyzer meter lndlcation of 0.3 volto.

e. Swltch DietortlonAnalyeer FUNCTION eelcctor to SET LEV-EL

f. Swltch SENSITIVITY selector to MAX and VERNIER to full CW. The Senaltlvity controla sttall have sufficlent range to @ve a full scale meter readlng (100% eet level).

5-16. DC ISOLATION CHECK (331A/332A~.

a. Connect 33lA/332A ae ehawn In Figure 5-5.

m

REMOVE SHORTING BARS BElWEEN WER LINE GROUNDANDCIRCUIT GROUND TERMINA L¶ ON DISTm- TIONANALYZERLNPUTTERMINALS AND FUNCTION GENERATOR OUT- PUT TERMINAI&

C.

6

e.

f.

&

5-17.

P.

b.

C.

d. Check the Dlstortlon Analyzer voltmeter full scale readlnge on allrangee agalnstthe appro- @ate iqut voltages from the Voltmeter Cali- brator. The voltmeter accuracy elmll bewltb-

b. Set Dletortlon Analyeer controle ae follmws: In l 2%.

FUNCTION Selector. . . . . . VOLTMETER e. Set the Mstortlon Analyzer METER RANGE METER RANGE Selector . . . . 1 VOLTS selector to 1 VOLT range.

VARIARLE PHASE FUNCTION QENERATOR

+ 203A

Figure 5-5. Teet Setup Lor DC Isolatlon Check

Sect1on v Ruqraphs 6-19 to S-19 and Table 5-B and Figure S-8

f. ChecktheDIetortlonAnalyzer voltmetertrack- Ing at. 1 volt Incrementa from. 1 volt to 1 volt. The voltmeter trncklng accuracy shall be rlth- In +l%

Mo&1 33lA/332A

g. Repeat steps P through f nhlle operaMg the Di6tortlonAnalyser atlíne voltagea of 105 VAC and 126 VAC.

ã-18. VOLTMmER FREQUENCYRESPONSE CHECK

(33lAj33aA).

a Camect SSU/SSU aa shwn In Figure S-6.

b. Set Mstortlon Artalyzer controls M follcws: NNCTION Selector. . . . . . VOLTMETER METERMGESelector.. . .Ol VOLTS

c. Set Frequency Respmoe Teet Set coutrol (@ Model739AR) 80 IolLarr: FUNGE SELECTOR. . . . . . EXTERNAL CWTPUTA’ITENUATOR . . . . 01

d. Set Osclmtor controls @ Mocbl 2WSR) PI folluws:

FUNGE . . . . . . . . . . . . x10 Frequency DIal . . . . . . . . 40

e. AdJuot the Wlllator AMPIJTUDE control for an IndIcatIon of . 9 on the Mstortlar Amlymr meter.

f. Adjuut the Frequency Ftespo~s Test8et METER SET ctirol to SET LEVEL tidtcatlon on the meter.

g. Swltch the &cll.lntor RANGE snltch to X1 and oet the Frequency DlaI to 6.

h. Readjust the Oscllhtor AMPIJTUDE control untll the Frequency Response Test Set meter Indlcates SET LEVEL

1. Th Distortton ArrPlyrer meter ehnll Indlcate between .855 and .945 (+5x).

ir Set the CMclllator to the frequenclcs lleted In Table 6-6. Re-t step h after each settlng. Ths Mstortlon Analyzer meter shpll Indlcate .9 * the tolerances tndlcnted.

Tabla S-5. Voltmstcr Freqwncy Resporue Check I

OBCILIATOW FREQUENCY TOLERANCE

FREQUENCY I I

L 1 Mc 4% BI3 to.92 3 WC +S% :851to.945

m. Swltch tbs Frequsncy Rea-e Test Set RANOE SELECTm to the l-3 Mc posltlon Set t,he FREQ. TUNING dlal to the frcquencles Heded In Table 5-ã. Adjust the Frequcncy Response Tsat Set AMPLITUDE control untll the meter Micates SET LEVEL after each frequency aettlng. The Mstortlon Analyrer meter ehall lndlcate .9 f the tolerances IndIcated.

IL Reperrt stepa P through m nhlle cperatíng the DlstortlcmAnalyzer cmllne voltagee of 105 VAC and 125 VAC.

5-19. RESIDUAL NUSE CHECK (33L4/332A).

a Connect P shielded 600 n reslstor acroas the Mstortlon Armlyzer INPUT terminals. (See Figure 5-7 for detnll~ on ccmntructing shlelded lond) Secure the shortlng tmr between the poner llne groundandclrcult grcund termirmla.

b. Set Distortlcm Armlyzer ccmtroln PI follaas:

FUNCTION Selector. . . . . . VOLTMETER METER RAK;E Selector . . . .0003 VOLTS

c. Tbe meter shall Indícate less thnn 25 pvolta.

FREWEMCY RE- TEST SET c$$ 739AR

OSCILLATOR @ 2oosR

77 e $‘33lA/332A

OõTORTION ANALYZER

Figure 5-6. Test SetupIor Voltmeter Frequency Reeponse Checkand Adjutiment and Seneltlvíty SwltchCallbratlon

5-6 01772-2

M&l 331A/332A

d Removethe600 fl resletor. Connecta shlelded 100 K ohm reslstor acroba the LNPUT terminals. @ee Flgure 5-7 for cktalln on ccnetructlng ehlelded 1-d )

e. The meter shall lndtcate less ttmn 30 /ivolta.

6-10. AM DETECTOR CIIECK (M&l 332A only).

L Camect Stgml Oenerator (& Model BOBA) 50 n RF CXJTPUT toDistortlonA~lyzer RF INPUT.

b. Set Dlstortlon Armlyzer controla 98 follara:

FUNCTlON Selector. . . . . . am LEVEL NORM-RF DET Swltch . . . . RF DET METER RANGE Selector . . . 0 DB FREQUENCY RANGE Selector X100 FREQUENCY Dlal . . . . . . 10

c. Set Signal Genaator controlm ao follona: FREQULNCY . . . . . . . . . . . IMC YGDULATICIN BELPCTOR. . . . EXT ATTENUAT~R/VERNIER . . . . 3.0 VOLTS ModulateBignalGeneratora@ut30%witha1000 cPS ~lgnal uolng a 203A Functlon Generator or compurble odI.lator.

d. Adjust Distortlon Analyzer SENSITIVITY Se- lector and VERNIER controlfor 0 DB reíerence.

e. Swltch FUNCTION eelector to DLSTaRTION. Ad- juet BALANCE controle and Frequency Dial for null lndtcatlon

f. Dletortlw etmll be more ttmn -40 db down.

5-21. ADJUSTMENT AND

CALIBRATION PROCEDURE.

5-22. The followlng Is a canplete adjuntmedand caIl- bratlm procedure for the 33lA and 332A. Before proceedlng wltb theee adjuetmcnts, tbe Performance Check~ ohmId be performed to determlne wbethcr adjustmcnta are necesaary. II ycur lnetrument doee not meet the teet Ilmlts specllled In the follrxvlng stepe. refer to troubleshwting procecbxe fnragraph for poaelblc cauae and correctlve actlon.

5-23. Tbe Adjuatment and Callbratlon Procedure la performed wlth the ac power cord connected to noml- rml llne voltage (115 v/230 v) 50 to 1000 cpo, unte88 dherwlee speclfled

C

Sectlon V hm~rnpha 5-20 lo S-27 and Flgure ã-7

5-24. METER MECILANICAL ZERO SET.

5-25. The meter 1s prqxrlyzerc+aetwhenthe polnter reste over tbe zero callbratlon merk on the meter ecale and the meter LS In ita normal opcrptlng en- vhnmmt and turned off. ceoary, aa Iollowa:

AdJust tbe zero-z&, unec-

a. Rotote mechanlcnl zero-adJustment mcrew clockwlse untll meter polnter 1s to the left of zero and movlng upacale toward zero.

b. Contlnue to rc4ale adjustment Bcrew clockwlse; etop when polnter 1s exactly at zero. If the polnter overshtis zero, repeat eCep a.

c. Whenpolnter 1s exactly M zero, rotate adJuat- ment Bcrew approxlmately 2 degrees camter- clockwlse. Thle la encugh to free the zero adjuutment acrew from ti meter wpenmlon. Ifpolnter moveecbxlng thls etep, repeot stepa a thrwgh c.

5-26. -ER SUPPLY ADJUmMENT6.

a. Remove top and bottom covers.

b. Securethc shortlng hr belween the poner Ilne gramd and clrcull ground INPUT termlrmls.

c. Connect common lead d VTVM (5 Mcxbel412A) to elther INPUT ground termlnals.

d. The measurement polnte, adJustmente, voltage llmlts and llne regulatlon epeclflcatlona are glven ln Table 5-6.

5-27. VOLTMETER GAIN ADJU8TMENTS.

a. Connect Voltmeter Callbrator (4 Model 738BR) to Dlstortlon Atmlyzer INPUT terminola. Re- move ahnrtlng bar between earth ground and flmtlng gramd termlnals.

b. Set Dlstortlon Analyzer controle aa follmvs: FUNCTION Selector. . . . . . VOLTMETER METER RANGE Selector . . . . OO1 VOLT8

c. Set Voltmeter Callbrator to 400 s RMS, 1.0 mllllvolt output.

d. AdjuztA2R34 (400 cps CAL. 2) for a meter lndlcatlon d 1.0.

Connector, male, w/ln-

b%. metal fllm

0.5$, metal film 6 Washer, tnt. lock 6 Spcer, 6-32 threaded 7 Shleld 8 Screw, blnd head, B-32

x 1/4 In

Ftgure 5-7. Shlelded load

11772-2

3 port No. 1251-0174 1251-0175

0960-0042 0758-0053

owl- 1037

21KMoo7 0380-0058 1251-0173 2470-0001

sec11on v Paragraph 5-39 and Tabh 5-6

Mdel331Ai33M

Table 5-6. Power Suoolv Adiurrtmente

PWER MEASUREMENT SUPPLY PC8.NT

-25 volts Any vlolet nlre +25 volte Any red wlre -11.3 volte blas AZ, Tc& Polnt 1 +6.0 volts blas AZ, Te& Polnt 2 +2.6 volte blas A3, Te& Polnt 1 -20.3 volta blns AS, Test Polnt 2

l Referenced to -26 volt oupply: -25 v

VOLTAGE REGULATION bDJUSTMENT LIMITS (vary Hne voltage be-

tween 103.5 and 127.5 VAC)

AlR13 -25 volta Mo. 5 volta -25 volts *O. 5 volts Nme+ +25 volte hl. 0 volta +25 volta íl. 0 volt A2R3+* -11.3 volt8 i-O.1 volta ofoptlmum eettlng A2FUO +6.0 volts í0. 5 volls +6.0 volt.3 +O. 5 volts ASR4 +2. 6 volta +zO. 2 volt +2. 6 volta +o. 2 VON A3R16 1 -20.8 volts +O. 2 volt 1 -20. 3 volta l o. 2 volt

: supply mu& be ndjuated flrst. l * Th16 voltage hita been adusted for opllmum dletortlm performance. Do not readjust unlessA2Qlls changed.

thls capacltor are between 50 and 2W pf. Increaslng capacitance re- cbxes the meter readlng. and vlce veroa.

e. Set Voltmeter Callbrator to 400 w RMS. 0.3 mllllvolt out@. Set Dlelorllm Analyzer METER RANGE selector to . 0009 VOLTS.

f. Tbe meter ‘elmIl lndlcate 3.0 i 1/3 of a mlnor dlvlelon (ti. 5S’$). 11 necessary, change A2R30 to set readlng wlthln these limite.

NOTE

J. Swltch Dlslorllon Analyzer METER RANGE Selector to . 001 VOLTS. Repeat eteps d and e.

k. Change Ckxlltator frequency to 5 epa. Repeat dep f3.

LI tranaistore are replaccd ln the meter ampllfler, lt may be necee- sary to change A2R30. Typlcal values for thls resletor are between 140-280 ohme. Increaslng reelntance decreanes the meter readlng and vlce versa.

m. The Dletorllon Analyzer meter ehall lndlcalc 0.9 *sa

g. Perform the voltmeter accuracy checkul Ppra- graph 5-17. The meter l hnll lndlcate wlthln

‘the llmlts epeclfled.

5-29. VOLTMETER FREQUENCY RESPONSE AD-

JUSTMENT.

n. Swltch Dlnlortlon Analyzer METER RANtiE Seleclor to . 01 VOLTS. Rcpeat slcps d and e.

p. Swllch Frequency Reeponee Test Set RANtiE SELECTOR Lo 1 - 3 Mc range. Adjust FnEQ. TUNING dlal for 2 MC oulput. AdJuRl AMPLI- TUDE control untll meter lndlcatee SET LEVEL.

e

P. Cmnect lnetrumente am ehown In Figure 5-6.

NOTE

q. AdJuti A2R39 (GAIN AIXIUST) for a Disl~~rllon Analyeer meter lndlcatlon ol 0. 9 on the 1. 0 acale.

Fiange awltch cover muãt be ln place befors performlngthese odjuatmente.

b. Set Metortlon Armlyeer controle PI follows: FUNCTION Selector. . . . . . VOLTMETER METEiR RANGE Selector. . , . octos VOLTS

c. Set Frequency Response Teot Set controle (+ Mcdel 739AR) at3 follows: RANGE SELECTOR. . . . . . EXl-ERNAL

6 Set Oscillator (+ Model 2OOSR) frequency to 400 cpe. Adjust the Qxlllator AMPLITUDE control for an lndlcatlon of 0.9 m the 1.0 ecole.

r. Ctmnge the Frequency Response Test Set frequency to 3 Mc. Readjust lhe AMPLITUDE control until meter Indlcales SET LFJEL.

8. AdJuat A2C21 (3 MC CAL trlmmer) for a Dls- torlíon Amlyzer meter Indlcatlon of 0.9 on lhc 1. 0 scale.

NOTE

The frequency reswnee adjuetmente made thue lar lnteract. It ~111 be neceeaary to repeat ateps n through B untll al1 adjustmente are wlthln speclflcatlone.

e. Adjuet the Frequency Responee Test Set METER SET control to SET LEVEL lndlcatlm on the meter.

f. Ctmnge Oeclllator Lrequency to 10 cps.

g. Readjuat the Onclllaior AMPLITUDE control untll the Frequency Response Test Set meter lndlcates SET LEVEL.

h The Dlstortlm Amlyzer meter shall lndlcate 0.9, -10%

NOTE

t. Swltch Dletortlon Analyzer METER RANGE to . 3 VOLTS. Repeat stepa c through e.

U. ReFH?iit 8tep p. Adjuat S3C6 (VOLTAGE CAL. at 3 MC . 3 V RANGE trlmmcr) for a Dlstor- tlon Amlyzer meter Indlcation of 0.9 on the 1.0 scale.

v. Swltch Dlstortlon Amlyeer METER RANGE Selector to 3 VOLTS. Repeat steps c thrcugh e.

w. Change Oaclllator frequency to 200 Kc. Repeat step g.

If readlng exceeda these llmlts, x. Ad]ust 8x1 (200 KC CAL) for a Dlstortlon change A2C25. Typlcal values for Analyzer Indlcatlon of 0. 9 on the 1.0 ecale.

5-8 01772-2

P. Cunnect lnstrument~ al shown ln Flgure 5-6.

NOTE

b.

Selector positlono for th SENSITIVITY Selector wlll be referred to aa follora: MLN - Po?lltlon 1. next step - Poal- tlon 2. etc.. ta MAX - Posltlon 6.

Set Dlstortloa Analyeer controlar w follona:

FUNCTION Selector. . . - s . . SET LEVEL SENSITIYLTY Selector. . . . . . Poaltion õ sENslTIvITY VERNIER Control HAX METER RANGE Selector . . . . .Ol VOLTS

C. Set Frequcncy Heaponee Teet Set controls (4 Mo&.1 739AR) M follows:

RANGlz SELECTOR. . . . . . . . EXTERNAL OUTPUT A’ITENUATOR . . . . . .03

d. Set Oscfllator (+ Model2WSR) frequsncy to 400 cps. Adjurt AMPLITUDE control fur M ltxflco- tlon on Dlntortlon Anmlyser meter of 9.9 on the 1.0 scale.

e.

f.

Adjust Frequency Response Test Set METER SET for SET LEVEL lndlcatlon.

Chaqe Oscillator frequency to 100 Kc. Ftead- just Oscfllator AMPLITUDE control for SET LEVEL lndlcatlonon Frequency Response Test Set meter.

g.

h.

AdjustSX5for ameter lndlcation of 0.9 on the 1. 0 scale.

WlthMETER RANGE Selector on . 01 volts, repeat oteps d through f, callhrating aennltlvlty ti the settlngs indicated ln Table 6-7.

Model 331A/332A

5-29. SENSI’I’IWl-Y SWITCH CALIBRATION. _----- ----

NOTE When awltchlng the BENfilTIYITY Be- lector, be cnreful not to move SENSI- TIVITY VERNIER control from YAX poa1tloa

Table 5-7. SenWvlty Swltch Calíhratlun

I~~T~~~LFLR I t~:tg I

5-30. CS BRfDGE BALANCE ADJUm. - -- a Test qulpment requlred for CS. Brk& Balnncc

Mjuet: Teet Oscillator (Jr Model ZOOSR).

b. #et Dlmtortion myeer controlo ae follows:

FUNCTION Selector. . * . - SET LEVEL METER RANGE Saltch * * * SETLEVELRange FREQUE’NCY RANGE Selector XlK SENSITIWTY Selector * . * . Pwltlon 5

c. Connect tlw test oscillator to the Dlntortloo Ao- alyzer and set frequency to 5 Kc. Adjust the oaclllatur output amplltude atxl SENSlTIVITy VERNIERto gire a readlq of +2 dh on the Dis- tortlon Analyzer.

01771-a

Sectlon V Pfllagrapha s-29 to 5-34

Set tho Dímtortlon ArrPlyrrr FVNCTION Solactor to DLBMRTION. Adjunt the frequency dial and BALANCE controla for best null. (Mlnimum of 40 dh down from the +2 db refcrence. ) COARSE BALANCE control should be near center of ltr extremes.

PwltionMETER RANGE f3witch to SET LEVEL, FUNCTION Selector to SET LEVEL

Chango tost orclllator frequency to 60 Kc and adjuot Its output amplltude to glvc a +2 db readlng on ths Distortion myzer meter.

Set the Dlatortlon Anolyser FUNCTION Sslector to DISTORTION and FRgQUENCY EUNGE to

- )<4K

h Wlthout dlnturblng tk BALANCE controla, adjurt frequency dial and C3 for best null. (Malni- mum uf 40 db down from tbe +Z db referente. )

5-31. TROUBLE5HOOTINO PROCEDURE.

5-32. This sectlon containm procedures dcslgned toas- elet ln the laolatlonof mnlfunctlons. Theseprocectures are based m a mytiematlc analyole of the butrument clrcults In an effort to locallze the problem. Thsse operatlonm should be undertaken only after lt tm.a bcen establlahed thatthedlfflculty can not bc ellmlnat.4 by the Adjustment ami Calfbratlon Procedum. An ln- vestigatlon should alao be made to insure thut the trouble lm not P rermlt of condltlona extemal to the 33lA/s3aA.

THE SSlA!SSPA CONTAINS VERY IUGH IMPEDANCE, HIGH FREQUENCY CIR- curra, CONTAMINATION OF THE SWITCHES, ClRCUIT BOARDS OR TUN- MG CAPACITORS WILL CAUSE HIGH IMPEDANCE LEAKAGE PATHS AMI SUBSEQUENT DETERIORATION OF THE PERFKlRMANCE OF THE INmRU- MENT. AVOITI TC)IJCIlTNG ANY OF THESE CIRCUITS WlTH TBE BARE FMGERS, AS SKIN OILS ARE EXTREHE- LY CONTAMMATING. IF HANDLJNG ISNECESSARY, WEAR CLEAN COl’-TON OR RUBBER GLOVES. DO NOT USE A PENCIL TO TEUCE C- THE INEl-RUMENT. GRAPHITE PENCIL LEAD IS AN EXTREMELY GOOD CON- DUCTOR AND AN ACCIDENTLY lNTRO- DUCEDPATH OF TH18 TYPE 18 BOME- TIMES DIFFlCULT TO LOCATE. OBSERVE THE RULES RECOMMENDED FWR SERVICING THESE AESEMBLIES STRICTLY AND USE ONLY Tm RECoàd- HENDEDSOLUTIONS FORCLEANLNG.

5-33. Conduct a visual check of the 33lA/332A for posslhle burned or loose componen@ loose comtec- timm, or any other obvluus comiltlon nhlch mlght suggest a source of trouhle.

S-34. Table S-gcontalneasummary of the front panel oymptoms and lnternal ad]uetment symptoms that

5-B

Sectlon V Mude1 331Ai332A Table ã-8

Table 5-8. Troubleehooting Ald

SYMPTCM PROBABLE CAUSE

1. ERON’T PANEL SYMPTOMS

A. No meter deflectlon wlth slgnal at ln@; Check Fuse (Fl). ON lamp not llbunltmted (All FUNCTION McKke. )

B. No meter dsllectlm wlth stgnal at lnput (. 3 check Fuse (Fa). VOLT range); No outprt; ON lamp llluml- nated. (AH FUNCTION Modes.)

C. No meter deflectlon wlth slgnal al lnllut; Check APCRO. AZCR7 and Ml. Chtput normal. (Al1 FUNCTION Modes.)

D. Meter pega up-ocale wlth or rlthout lnplt Ckck AZC27 and A2C20. m all VS. (All FUNCTION Modes. )

E. Wlll not null; VOLTMETER and SET Check S4AF, CIA-D, C3, RI, R5. LEVEL mc&s norma1 (D~OR’ITON Male ollly.)

F. No SENSlTIVITY VERNIER control In SET Check R2, R3, S2R8 and A3Ql through A3Q6. LEVEL mods. VOLTMETER mode nor- maL (SET LEVELModeOnly.)

G. BAtiNCE controls erratlc. (DISTORTION Check R4 and R5. Mode only. )

2. INTERNAL ADJUSTMENT SYMFTOMS

A. Insufflclent -25 volta adJuetment rlth AlR13, Check AlCl, AlCll. AlCR3, AlCR4, AlCR7 and measured at any vlolet aire. (Refer to AlQ4 through arQ6. Paragraph 5-26. )

B. +25 volte eupplp out d apeca, meawed at Check -25 volta (see Symplom 2-A above), AlC2, any red wLre. (Refer to Ppragraph 5-28.) AlC6, AlCRl, AlCR2 and AlQl through AlQ3.

C. Inaufflctent btaa aqtiment wlth A2Ft3, Check -25 ~011s (eee Symplcm 2-A above). APC4. mmred at APTPl. (Refer to PPR- APC14 and A2Ql through AZQ4. grapb 5-26. )

D. Innufflclent blas adjustment wlth A2R20, Check -25 volta (see Symplom 2-A above). 125 meaeured at APTP2. (Refer to Pnra- voltR (see Symptom 2-B above), A2C15, h2Q5 graph 5-27. ) through AZQB.

E. Insufflclent 400 cps adjustment wlth A2R34. ChecktEvolts blas (sec Symptom 2-D atwve), check (Ftefer to Farpgraph 5-27. ) for -4 vdc al t Meter terminal. chunge AZR3O (see

Paragraph 5-27). and check Ml.

F. Inaufflclent galn adjustment wtth A2R39. Check AZQ5 thrrtxlgh A2QD. (Refer to PorograN 5-28. )

G. Ineuffíclent 3 Mc callbn-ttion adjustment Change AZC22. flncreaeing value oí C wllldecreasc wtth AZC21. (Refer to Ppragraph 5-28. ) meter readlng. )

H. Inaufficlent blas adjuetment wlth A3R4, Check-25 volta (see Symptom 2-A abve), 425 volts meaeured at A3TPl. (Refer to PPIP- (see Symplom 2-B above), A3C1, ASCB and A3Ql graph 5-26. ) thraqh A3Q3.

J. Ineufflclent blae adjuetment wlth A3R16, Check -25 volts (see Symptom 2-A ahove), A3C7, measured at AJTP2. (Refer to Para- A3C13 and A3Q4 through A3Q6. ChanRe A3R17. graph S-26. ) (fncrea~Ing~lueofRwllllncreasevoltageatA3TP2.)

5-10 01772-l

Model 33lA.‘33u

mlght be cncountcrcd It ahould be used ln lnltlaI eltorta to select P mtartlng point for tra&lsshwtlng procedures.

S-35. TobIe S-9, lnconjunctlon wlth Figure 5-Q. con- tnlns procedures rhlch may be used as a gulde ln lsolatlnu maUunctlons. The stepe ln Table 5-Q de- scrlbe thc normal condltlons whlch sbould countend durlng the checka (clrcled numbers N e)nln Flgurc S-8.

b -

S-36. The cbecks outllned ln Table 6-Q are not de- slgned lo measure al1 the clrcult parameters. rather, only tolocallxe a malfunctlon Therefore, lt ls qulte posslbIe tbat a&lltlonaI measurementa allI be requlred lo complctely lsolatc a problem. Circult parameters may vary sllghtly between instrumento: therefore. lt should nc be. necessary to pmclsely dupllcate the values @ven.

5-37. BOTTOH BliLELD REMOVAL.

5-38. Thebc4tom shleld ls attached by seven screws. Access to slx la obtalned by removlng th bdtom cover. Accese to the other ls obtalned by removlng thelefl (as vlened from the front of lnstrument) reirr slde cover.

5-39. ,SERVICINGETCBED CDUJJIT BOARDS.

5-40. TheModelSSfAL three etched clrcult bcards and theblodel SSZA, four. Use cautlon when removlng them to avold damaglng mounted components. The C Part Number for the aseembly ls marked on tbe clrcult board to klentlfy lt. Refer to Sectlon VB for parta replacement and & Part Number lnformatlon.

5-41. The etched clrcult boards are of the plaled- through type. The electrkal connection between the tao sldes of the board ls made by a layer of metal plated thrcugh the component bole. When worw on these boards. olmerve tbe followlng rules:

B

THE CIRCUIT BOARDS IN THE 33IA/332A CONTAIN VERY HIGH IMPEDANCE ANDHIGH FREQUENCY CIRCUITS. TO AVOID CONTAMI- NATION OFTHESE CIRCUIT BOARDB, AND SUBSEQUENT HIGH RESIS- TANCE LEAKAGE PATHS, lT IS IMPORTANT THAT THE FOLLC%‘ING RULES BE STRICTLY OBSERVED.

a. Use a low-hect (25 to 30 watts) emall-tlp sol- dertng Iron, and a emaU dlameter rosln corc solder.

b. Remove ctrcult componenta by placlng the col- derlng iron on the component lead on elther slde d the boclrd, and pulllng up ou the lead. If a component la obvimsly ctamaged, clip leads off as closc to the component as posslble and then remove leads wlth a solderlng lron.

B

EXCESSIVE HEAT CAN CAUSE THE CIRCUIT AND BOARDTOSEPARATE. ORCAUSE DAMAGE TO THE CCBi- PONEN-Z.

01772-2

Sectlon V Paragrapbs 5-35 to 6-43

Clean component lead hale by heatlng the hole wtth the íron and lnsertlng a wocden todhplck. Remove the toothplckafter the solder has cooled and lnsert the new component lead.

To replace componente, stmpe nsw Isads and lnsert them ln Isad holes. Rsheat wlth solderlng lron and add a emaI amount d new solder ao requlred to Imure a gûod electrlcal connectloh

Clean excesslve flux from tbs connectlon and adjoinlng ama.

TO AVOU)SlJRFACE CONTAMINATION OFTHE PFUNTEDCIRCUIT. CLEAN WITH A WEAKSOLUTION OFWARM WATER AND MILD DETERGENT AFTERREPAIR. RINSE THOROUGH- LYWJTHCLEANWATERANDALL0,V ITTODRYCOMPLETELY BEM)RE OPERATING. Do NOT USE AL- COI-IOLORAN- C LEANING SOLUTION EXCEPT DETERGENT AND WATER. DO NCYT APPLY ANY COMMERCIA Lm E SEALING SPRAY TO THE BOARDB. APPIJ- CATION OF THESE AGENTS WILL CAUSE LEAKAGE PATHS ANDSUB- SEQUENT DETERIORATION TOTHE. OPERATION OF THE INSTRUMENT.

Wear clean cotton or rubber gloves when ttandl- l.ng the clrcult boards. Avold tcnmhlng the board or componente wlth lure flngers as skln otIs can cause conlamtnatlonand leakage poths.

5-42. SERVICING ROTARY SWITCHES.

5-43. Thr 33IA/332A has four rotary type swltches FUNCTION. SENSITIVI’IY, FREQUENCY RANGE. andMETER RANGE. Whenworklngon these swltches, observe the folknvlng rules:

THE SWITCHES IN THE 331A/332A CONTAIN VERY HIGH IMPEDANCE AND HIGH FREQUENCY CIRCUI’l’S. TO AVOID CONTAMINATION OF THESE SWITCHES, AND SUBSE- QUENT HIGH IMPEDANCE LEAKAGE PATHS, IT IS IMPORTAN-I THAT THE FOLLCM’INGRULES BE STRICTLY OBSERVED.

a. Uee a low-heat (25 to 50 watts) amall-ttp solderlng irotl. and a ama11 dlameter rosln core solder.

b. When replaclng componenta. attempt to dress them as nearly to their orlglnal allgnment as p0.9slble.

c. Clean rxcessive flux from the connectlon and ndjolnlng area.

5-11

fkctbn v Tabla 1-9

Hc&l 33w332A

TOAVOlDSURFACE CONTAMINA- TION OF TKE SWlTCA, CLEAN WITHAWEAKSOLUTIONOPWARM WATER AND MILD DEI’ERGENT AFTER REPAlR. RINBE THOR- CXJGHLY WITR CLEANWATW AND ALLtXJ lTT0 DRY Ca6PLgTELY BEFCRE OPERATING. DO NOT USE CARBON TETRAC-, ALCOROL OR ANY COMMERCLAL TELEVISION AÑbRADIO SWITCH CLEANER ON THE SWX’CHES IN THIS LNtTlXUM.ENT. USE ONLY DETERGENT AND WATER. NOT APPLY ANY CCMMERCLAL

MCXSTURE SEAIJNGSPRAY TOTHE SWITCRES. THESE AGEN’lY ARE EXTREHELY CONTAMINATING ANDWILLCAUSE LEAKAGE PATHS ANDSUBSEQUENT DETERICXtATION Td TRE OPERATION OF TRE IN- STRUMENT.

d. Wenr cleuncdztcnor rubber glovesrhenlmndl- ing the snltch Avold tmchtng the mttch or compments aith lxue Hrqcrs II sktn olls can caune ctimtrmtion and leakage poths.

e. After cleaning the mwttch, PI above, opply P llght cont oí lubrlplate to the ewttch detent tmlls. DO NOT apply lubricant to the swttch contacta or allow lubrlcant to corkamlnute components.

Table 6-9. Normal Trcub1eshootin.g Indicattons

CHECK FUNCTION METER INPUT NUHBER BELECTOR RAMOE SIGNAL

0 VOLTMETER .3 VOLTS 0.3vrms, 1Kc

(z) VOLTMETER .3 VOLTS o.svrms. 1Kc

VOLTMETER .3 VOLT8 No Inplt

VOLTMETER .3 VOLTS o.svrms, 1 Kc

VOLTMETER .3 VOLTS 0.3vrms, 1Kc

VOLTMETER Vary FullScale, 1Kc

I

VOLTMETER . S VOLTS 0.3 vrms, 1 Kc

SET LEVEL .3 VOLTS 0.3 Vnnl, 1 Kc

DIBTORTION Vary O.QmmI, 1Kc

SET LEV-EL .3 VOLT8 0.3 vrms, 1 Kc

NORMAL INDICATION

0.1 vrms *lOs al OUTPUT terminals.

Meter shculd read 0. 3 vnna.

Apq~rox. -4 vdc at + Meter terminal.

Approx. 0.1 vnns at junctlon A2C20 - AZC2’7.

Approx. 1 mvrme ot APC15 for F. S. lnput cm al1 ranges exccpt .0003 Volt. Approx. 0.3 mvrms for F. 8. on . 0003 Volt range.

Aoorox. 0.3 vrma at ASCII.

Approx. aame as input slgnal on CtOG3 to .3 Volt rmges; appror

i/mo of input sigd on 1 to 900 volt nmges; meaaured at A2Rl

Approx. mme an hput voltage; mePsured at SlAR (10) on VOLT- METER mc&: measured at SlAR (2) on SET LEVEL and DISTORTION modes.

Meter ehwld read 0.3 vrms.

SENSITTYITY VERNIER ehould have > 10 db ranue. aa read on meter.

Adjustment of FREQUENCY and BALANCE controle ehould glve “null” lndlcatlon an outllned In Para- graph S-18.

WNSlTlVITY swltch ekld attenuate input ln ? 10 db stepe, measured at A2Rl.

5-13 01172-2

‘si?%! r

CIUXK i RFDET 1

(T

0 2 METER WECK

(F

0 I WTPUT MCK

(1

(F

(F

0 9 UETER MCK

(1

(Fl

0 5 POST ATTEN. CHECK

<

(TI

CHECU - POST

ATTEN

0 (F)

4 METER (TI

AMf’L. CWCK WECK +

(F) T%Y

3 3 YETER INPUT

(Tl

CHECK CHECK -m

A2ZRP;ND

(TI

0 10 !XNS.VERN. CHECK

NOTE : 1. (TI- TRUE, (F)=FALSE.

2. REFER TO TABLE 5-9 FOR TRLIE INWCATIONS.

F’ígure 5-8. Troubleahootirrg Lcgic

Model 33lA/332A sec.tloll VI

Pnrflgraph & 1

c SECllOi’l VI

SCHEMATIC DIAORAMS

6-1. SCHEMATIC DIAORAMS. dlngrume illustralc lhr! clrculls cwlaln& wlthln each asaembly aa uell as the assembly inter-

Thie scctlon contains the schematic dlagroms nec- corulertlons. Main sipal paths and elgnificant essary for operatic and maíntenance d the 3SlA feedback paths are Identtfied (refer to notes czn and 332A Mstortion AMlyzers. The schematíc the schematlc diagrama).

QL

01772-l 6-l/%-2

&-del 33lA/33aA

a SCCTION VII

RBPLACLABLI PARTS

Q

7-l. INTRODUCTION.

7-2. Thl.s sectlon contalna information Ior orderiug replacement parta. Table 7-l lísts parts In alpha- numerkal arder of thelr referente destgnators and hdkates the descripCion and @ part number d each part, together with any applkable näes. Table 7-2 llstn parta in alpha-numerlcal order d thelr * part numlxr and provldes the followlng lnformatlon on each part:

A B

Descrlptlon ofthe part (see list ofabbrevlations bel<m).

Typkal manufacturer of the part in a five-dlgit code (see Hst of manufacturers In AppendLx).

Manufacturer’s pprt number.

Tc&1 quantity usedin the instrument CrQ col- umn).

- asmembly = mutor

C = capcltor CR - dhdc DL = delay Ilne JIS - dbvlce slgnallng (lamp) E = mlr;c eleclrunlc part

? P i amwres

b = tJandpaYs bW0 = backward wnve

oscIlJnux

C = carbun cer L ceramlc cmo - cablnet mount only Clal - cobfríclent con, = common comp - comporltlon ccmn - connectlon Cl-t - calhode-rny tube

&P = depumted

EIA w Tubbr or trmslslur8 maetlny Elcctrunlc Intistrler’ Ass~lcla- rlon standurda ~111 nurmally rrnulr In Inatrumcnl u~~.ryL(nK wlthln aycclllcatlcmh: tutx-u and trantilstllrs arlected Ior bes1 pi4urnlanw wlll be supphd ir ~wdert-d

by $ stw’k ~nml~ra.

Section VII Pal%graplUl 7-l to 7-7

7-3. Mlscellanea parte are llsted at the end d Table 7-l.

7-4. ORDERINO INFORMATION.

7-S. To o&ain replacement prts, addrese arder or hqutry to yax local Hewlett-Packard F’ield Office (see Hsts at rear of this mamlfor addrseses). Iden- ttfy m by their Hewlett-FQcknrd part numbere.

7-6. NON-USTED PARTS.

7-7. To &ain a part tltat le not llsted, tnchdc:

0. Instrument model number.

b. Instrument serial number.

C. Description d the part.

d. Fimctton and location of the prt.

REFERENCE DESIGNATORS _ .-_.- ____. -- ____

F = Iuse P - PU FL = Hlter Q = transistor J : jack K = rrluy L q Inductor

li - renlslor In - thermlstor

h4 - metrr s : switch MP - meL’hanlca1 tmrt T - trar&xmcr

ADBREVIATIONS _- .._ ----

mtm w

NC Nc

NO NP0

nsr

pl

rcct

= mamtiny = mylar

- normully clt>ued A IWL>II

- n~lrmally IJpen - negatlve ptiltlve

zeru (zero temp- aturc coefficlent)

: nut sepsntely replnceable

- orckr by de- scripllon

-F--k 1 prlnied ctrcuit

buard - picolarada -

10-l’ rara& - pebktopak - pcak Invrrue

vultnge = poYILlurl (8)

- p,lystyrene = pllcntlnmeter

= rwtlrkr

V

W X XF XIM z

rc& rmr rmo

s-b tk scci SI nll 81

td TIO

m3 tal trlm tw1

v*r WV/ W WY W/O

.

- vacuum tube. neon bulb. phaocsll. etc.

= cable - socket = Iuseliol&r = lampholder = network

n ro(ary

- ro&-mean-quare = rnck mwnt rmly

= rlow-blow = selrnlum n sectlon(sl q slllcun - ellver = #Il&

= tlmc delay = titanium dIoxI&

- toeg1-z - tolerance - trlmmer = travellng wave tube

- variable = wlth - watts 1 wlrewound = w1thour

- c@lmum vulue ~k~ed at hctury, averngc vïlur shown (ps14 may be omltted)

01773-1 7-l

Serticm WI Table 7-l

Table 7-l. Relerence Deslgnatlon Index

HEFERENCE DESIGNATION

Al OO331-66501 Board, etched circult aaa’y, power eupply includes:

AlCl and AlC

AICS AlC AlCS AlC

0180-0308

otflo-0001 0170-0021 0180-0058 0160-0050

AlC OlEO-0098 AlC 0170-0021 ALCQ 0160-0061 AlClO 0180-0058 AlCll 0160-0050

AlCRl thru AlCR6

AlCR7

AlQl thru AlQ3

AlQ4 and AlQ5

AlQ0

AlRl 0667-3331 AlR2 0766-0029 AlR3 0686-1026 AlR4 0086-7525 AlR5 0686-6625

AlRtl AlR7 AIRE AlR9 AlRlO and

AlRll

0757-0755 0757-0661 0686-1025 D766-002s 0666-6625

lt fxd, 33K ohms +lO%. 1!2 w R: fxd, met flm, 10 ohms l 2%, 3 w, T!C LEO PPM:OC R: fxd, comp, 1000 ohme &$, 1!2 w R: fxd, comp, 7500 ohme *5’K, 112 w R: fxd, comp, 61300 ohms &$, 1/2 w

R: fxd, met flm, 12. LK ohms l l%, 1/4 w R: fxd, met flm, 12.7K ohms *l%, 1/4 w R: fxd, comp, 1000 ohms iS%, 1.‘2 w R: fxd, met f’lm. 10 ohms *2%, 3 w, T.‘C *250 PPM:oC R: fxd, comp, 6800 ohms A%, 112 w

AlR12 0666-7525 R: fxd, comp, 7500 ohms *5%, 1:2 w AlR13 2100-1434 R: var, lln taper, 1K ohm &UJ% AlFU 0666-1525 R: fxd, comp, 1500 ohme *5?, 1/2 w AlR15 0666-5125 R: úd, comp, 5100 ohme l 5?. 1/2 w

A2 D0331-66502

A2 90331-66504

@ PART NO. DESCRIPTION

lQOl-0026

1902-0045

1654~0038

1650-0111 Transistor. germantum, PNP

1654-0039 Traneletor, NPN

Cl thru Cl1 Ql thru QS CR1 thru CR7 Rl thru R15

C: fxd, elect alum, 200 pf -la +lOO%, 60 vdcw

C: Lxd, elert, 100 ~1 +lOIT$ -lO’k, 15 vdcw C: fxd, my die. 0.0047 pf *llY& 400 vdcw C: fxd, elect, 50 pi -lO’f# +lOC& 25 vdcw C: fxd, alum elect, 40 pf -15% +lOO’%, 50 vdcw

C: fxd. elect, 100 pf, 12 vdcw C: fxd, my dle, 0.0047 pf l le, 400 vdcw C: fxd, elect. 100 pf +lOO% -lO%, 15 vdcw C: fxd, elect, 10 pf -1oLfi +lOU%, 25 vdcw C: fxd, alum elect, 40 pf -15% +lOm, 50 vdcw

Dlode, si, rectlfler. lN31Q3. 0.5 amp, 200 plv

Dlode, breakdown, 7.2 v +a”,, 400 mw

Transistor, NPN

Board, etched ckt aa6’y meter amp and lmpd conv lncludes:

Cl thru C2Q Ql thru QQ CR1 thru CR7 Rl thru R4Q

Board, etched ckt aae’y meter amp and lmpd conv (optlon 01 only) lncludes:

Cl thru C25 Ql thruQ9 C27 thru C2Q Rl thru R4Q CR1 thru CR7

# See introductlon to MS section

7-2 01772-2

C

Model 331A/332A Sectton VII Talrle 7-l

Tahle 7-l. Referente Ikslgnatlon Index (Cont’d)

RE FERENCE nI;: PART NO. DESCRIPTION NOTE 1ESIGNATION

A2Cl A2C2 and

A2C3

0140-0201 C: fxd, dípped mica, 12 pf *5% 0140-0200 C: fxd, dlpped mica, 390 pf *5q.

A2C4 0180-0101 A2C5 01 fWoo33

AI03 0180-0060 A2C7 0140-0145 A2C8 0180-0224 A2CB 0140-0193 A2ClO oleo-0104

A2Cll 0140-0200 A2C12 0150-0084 A2C13 0180-0059 A2Cl4 0180-0307 A2C15 0180-0305

A2C16 0100-0195 A2C17 0140-0218 A2Cltl 0180-0061 A2C19 0140-0208 A2C20 0150-0084

A2C21 0130-0017 A2C22’ 0140-0190 A2C23 0140-0206 A2C24 0150-0084 A2C25+ 0180-0061

A2C26 0180-0033

C: fxd, solid tanta die, 1.8 pf *lO%, 35 vdcw C: fxd, elect, 50 PI -10% tlO@., 6 vdcw

C: fxd, elect, 200 pi -10% +lOO%, 3 vdcw C: fxd, dipped mica, 22 pf k5’x C: fxd, elect alum, 10 ,uf -10% +7%, 15 vdcw C: fxd, dipped mica, 82 pf ~5% C: fxd, alum elect, 200 ,uf -lo(h +lOO%, 15 vdcw

C: fxd, dlpped mica, 390 pf *5’& C: fxd, rer die, 0.1 pi +EiO$ -2O%, 50 vdcw C: fxd, elect, 10 pf -lW% +lOO%, 25 vdcw C: fxd, elect alum, 500 pf -.lO’$ +lOO%, 15 vdcw C: fxd, elect alum, 1000 pf -103% +lOO%, 2.5 vdcw

C: fxd, cer díe. 1000 pi í20%, 250 vacw C: fxd, dipped mica, 160 pf ifi. C: fxd, elect, 100 111 +lOO% -lO$!, 15 vdcw C: fxd, dipped mica, tWO pf *5% C: fxd! cer die, 0.1 PI +80% -2O%, 50 vdcw

C: var, cer, 8 - 50 pf C: fxd, dlpped mlca, 39 pf *5% C: fxd, dipped mica, 270 pf &i’% C: fxd, cer die, 0.1 pf +l30% -2O%, 50 vdcw C: fxd, elect, 100 pf +lOO% -lO%, 15 vdcw

C: fxd, elect 50 pf -la +lM%, 6 vdcw (omltted on Optton 01)

A2C27 and A2C28

A2C2fP

A2CRl thru A2CR4

A2CR5 AICRB and

A2CR7

0160-0058 C: fxd, elect, 50 pi -ll% +lOO’& 25 vdcw

0140-0195 C: fxd, dll)ped mica, 130 pf ~5%

1901-0044 Dtode, rectlfler, si, 20 ma +l v

1901-0025 Dícde, rectlfler, 81, 50 ma *l v, 100 plv, 12 pi 1910-0022 Diode, germanium, 5 wiv, 3.5 ns, 2 pf at 1 v

A2Ql KW A2Q3 AzQ4

A2Q5 AaQs A2Q7 A2Q8 and

AaQe A2Rl A2f-U A2R3 A2R4 A2Fl5 A2RB

1855-0004 Transistor, P channel, FET 1650-0158 Transistor, PNP, germanlum 1854-0042 Transistor, al, NPN 1850-0158 Transistor, PNP, germanium 1205-0037 Heat slnk for A2Q4 (marwbtorp) 1654-0042 Trunsit;Lor, el. NPN 1853-0009 Transistor, el, PNY 1854-0042 Translslur. si, NPN 1853-0009 Transistor, si, PNP

06El3-3015 R: fxd, comp, 300 ohms &%, 1/4 w 0083-9135 R: fxd, comp, 91 K ohms ~5%. 1,‘4 w 2100-0094 R: var, comp, Hn taper, 50K ohme í30%, 0.10 w 0683-3635 R: Ixd, comp, 36K ohms f5’$> 1.‘4 w otlaa-6145 R: fxd, comp, 510K ohms í5%, 1/4 w 0683-1025 R: fxd, comp, 1000 ohms &5%, 11’4 w

l Avorage value shown, optlmum value eelected Pt factory ti Sce Inkoduction tu thts sectlon

01772- 2 l-3

Section VII Table 7-l

Model 33lA/332A

Table 7-1. Referente Deeignatlon Index (Cont’d)

REF’ERENCE DESIGNATION ‘@ PART No* DESCRIPTION NOTE

A2R7 A2R8 A2RO AIRlO ABRll

AZR12 AZR13 AZR14 A2R15 A2R18

A2R17 A2R18 and

AaRlO ABFC40 A2R21 A2R22

A2R23 A2R24 ABR26 AOR28 A2R27

ABRPE A2R29 A2R30* A2R31 A2R32

A2R33 A2R34

A2R35 A2R38

A2R37 A2R38* A2R39 A2R40 A2R41

A2R42 A2R43 A2R44 A2R45 A2R48

A2R47 ond A2R48

A2R49

A3

A3Cl A3C2 A3C3

0683-3025 R: fxd. comp, 3000 ohme +5%, 1/4 w 0883-1025 R: fxd. comp, 1000 ohme +5%. 1!4 w 0883-7515 R fxd, comp, 750 ohme *5%, 1/4 w 0883-1535 R: fxd, comp, 15K ohms *5% 114 w 0883-4335 R: fxd, comp, 43K ohma *58, 114 w

0883-8215 R: fxd, comp, 820 ohms l 5’%. 1/4 w 0883-8815 R: fxd, comp, 880 ohme i5%, 1/4 w 0883-1515 Fk fxd, comp, 160 ohms *5%, 1.‘4 w 0883-4715 R bd, comp, 470 ohms +6%, 1/4 w 0883-1005 R: M. comp, 10 ohme *SS, 1/4 w

0883-8215 R: fxd, comp, 820 ohms *5%, 1/4 w Not Assigned

2100-0092 R: var, comp, lin taper, 1OK ohme &O%, 0.15 w 0883-3025 R: Ixd, comp, 3000 ohme l 5%, 1/4 w 0883-6116 R: fxd, comp, 610 ohms ~68, 1/4 w

0883-5105 R fxd, comp, 51 ohms l 6%, 1/4 w 0883-8825 R: fxd, comp, 8800 ohms *5%. 1/4 w 0883-2015 R: fxd, comp, 200 ohms *68, 114 w 0083-2025 R: fxd. comp, 2000 ohms l 5%, 1/4 w 0883-1235 R: fxd. comp, 12K olune *58, 1/4 w

0883-1005 R: fxd, comp, 10 ohms ~5%. 1/4 w 0898-3174 R: fxd, carbon flm, 4.42 ohms al%, 1/2 w 0883-1615 R: fxd, comp. 150 ohms *5%, 1/4 w

Not Assigned 0898-3147 R: fxd, met flm, 191 ohms *l%, 1/4 w 0757-1102 R: Ixd, 180 ohms +l%, 1/8 w (Opllon 01 only)

0727-0348 R Ixd, met flm, 10 ohms l l%. 1/8 w 2100-0227 R: var, ww, lin taper, 20 ohms *lo% 2100-0208 R: tid. ww, 50 ohms +lO% (

T ion 01 only)

0757-0348 R: fxd, met flm, 10 ohms +l , 1/8 w 0883-3845 R: fxd. comp, 39OK ohms *5%, 1/4 w

0883-3025 R: fxd, comp, 3000 ohms k58, 1/4 w 0883-1015 R: fxd, comp, 100 ohms &5%, 1/4 w 2100-0151 R: var, comp, lin taper, 5OOohms *30%, 0.15 w 0757-0390 R: fxd, 38.5 ohms *l%, 118 w 0883-1815 R: kd, comp, 180 ohme *5%, 1/4 w

0883-1006 R: fxd, comp, 10 ohms +5%, 1/4 w 0083-2425 R fxd, comp, 2400 ohms *5%, 1!4 w 0883-1015 R: fxd, comp, 100 ohms *5%, 114 w 0883-2405 R: fxd, comp, 24 ohms *5%, 1/4 w 0883-3026 R: fxd, comp, 3000 ohms *6%, 1/4 w

0883-6116 R fxd, comp, 510 ohms l 5%, 1/4 w 0883-6105 R fxd, comp, 51 ohms *5%, 1/4 w @#ion 01 only) M83-2Q25 R fxd, comp, 2000 ohms *6%, 1/4 w

00331-88503 Boízrd, etched ckt asa’y, rejection omplifler includes: Cl thru Cl6 Rl thru R.28 QltbQB

0160-0039 C: fxd. elect, 100 pi, 12 vdcw 0180-0080 c: fxd, ele&, 200 /.if -10% +lOO%. 3 vdcw 0180-0022 C: fxd, elect, solíd tanta, 3.8 pf *lo%, 36 vdcw

+ Average value shn, optimurn value selected at faCtOry

# See Introduction to this sectlon

7-4 01772-2

--. ._

Model 331A/332A Sectton VII Table ‘7-l

--

Table 7-l. Referente Destgnatton Index (Cont’d)

REFERENCE DESIGNATION + PART NO. DESCRIPMON NOTE

A3C4 A3C5 ASCB ASC A3C5

A3C9 ASClO ASCll* A3C12 ASC

ASC14’ ASC

A3Ql ASQ2 and

A3Q3 AW4 ASQ5 ASQ6

A3R1 ASR2 A3Ft3 A3R4 ASK5

A3R6 A3R7 A3R6 ASRB AaRlO

A3Hll ASFU A3R13 A3R14 A3R15

ASRl6 A3R17’ ASR18 ASRlB A3K20

ASR21 A3R22 A3Ft23 A3R24 and

A3W5

0140-0203 C: fxd, mica die, 30 pf &, ROO vdcw 0140~OO92 C: fxd, molded mica, 240 pf & 0180-0022 C: fxd elect, solld tanta, 3.9 pf *le, 35 vdcw 0170-0040 C: fxd, my die, 0.047 pf *l@& 0160-0038 C: fxd’ elect, 100 pi, 12 vdcw

0160-0062 C: fxd, elect, 300 pf -IC& +lm, 6 vdcw 0140-0196 C: fxd, mtca dle, 150 pi *5?., 300 vdcw 0140-0041 C: fxd, molded mica, 100 pi *2#$ 0160-0104 C: fxd, alum elect, 200 uf -Ia +lOfi, 15 vdcw 0180-0307 C: fxd, ekct alum, 500 uf -la +100(6, 15 vdcw

0140-0014 C: fxd, molded mica. 56 pf kl@, 0160-0307 C: fxd, elect nlum, 500 pf -IO’{, +lOfl, 15 vdcw

1654-0042 Transistor, el, NPN 1854-0057 Transletor, sl, NPN

1855-0006 Tramtstor, si, P channel, SU414A 1654-0042 Transistor, si, NPN 1650-0086 Tranulstor, germanlum, PNP

0666-2415 R: fkd, comp, 240 ohms *5?., 1/2 w 0866-1245 R: fxd, comp, 12OK ohme +%, 1.‘2 w 0686-1235 R: fxd, comp, 12K ohms l 5’& 112 w 2100-1436 H: var, Rn taper, 10K ohms *SO% 06B6-2015 R: fxd, cl)mp, 200 ohms l 51,, 1/2 w

0666-3625 R: fxd, comp, 380 ohms +5%, 13’2 w 0666- 1025 R: fxd, molded mica, 38 pf klO% 06tlB-6825 H: fxd, comp, 6600 ohms kW., 1./2 w 06tlB-2725 R: fxd. comp, 2700 ohms &., 1/2 w 0686-1515 R: fxd, comp, 150 ohms *ti,, 1/2 w

0686-2035 R: fxd, comp, 20K ohms *5%, 11’2 w 0757-0690 H: fxd, met flm, 3.92K ohms *l%, 112 w 0757-0836 R: fxd, met flm, 7.5K ohms *l%, 1/2 w 0698-3140 R: bd, met flm, 2.4BK ohms *l%, 112 w 0666- 1265 R: fxd, comp, 12 M ohms d$, 1/2 w

2100-1435 R: var, 1111 taper, 3300 ohms ile, 0686-2025 R: fxd, comp, 2000 ohms *fin, 1,‘2 w 0686-7525 R: fxd, comp, 7500 ohms &I$, 1/2 w 0683-1015 R: fxd, comp, 100 ohms l 5%, 1!4 w 0686-3625 R: fxd, comp, 3600 ohms &%, 1:2 w

0686-5615 R: fxd, comp, 560 ohms *5%, 1/2 w 0686-3015 R: fxd, comp, 300 ohms &5%, 1!2 w 0666-3315 R: fxd, comp, 330 ohms l 5%, 1/2 w 0666-2025 R: fxd. comp, 2000 ohms +%, 1.‘2 w

ASE26 0686-4705 A3R27 0686-2015

ASFUB 0686-1035

R: fxd, comp, 47 ohms +s,, 112 w R: fxd, comp, 200 ohms k5%, 1/2 w

R: fxd, comp, 10K ohms &, 112 w

+Avcnt.o~ VP~W shown. opttmum value selarted at factory I See lnlroductlou tu this scction

01772-a 7-5

Scction VII Tablc 7-l

Model 33lA./332A

Table 7-1. Refcrence Deslgnation Index (Cont’d)

REFERENCE DESIGNATION ++ PART NO. DESCRIPTION NOTE

A4 00332-66502 Bcmrd etrhed ckt ase’y. RF detector (332A only) includes: Cl thru C3 Ll thru L2 CR1

A4Cl and h4C2

0140-0160 C: fxd, mica dle, 2000 pf *2%, 300 vdcw

A4C3

h4CRl

A4Ll and A4L2

0140-0156 C: Lxd. dlpped mica, 1500 pf &%

1910-0016 Dlode. germanlum, 40 v. 100 ma, +O. 75 v

9140-0052 Coil, RF, 3.3 mh

CI ca c3 C4 c5

C6 C7 and CR CQ

CR1

0160-0953 0150-0012 0130-0006 0121-0004

0140-0021 0150-0012 0140-0206

1901-0025

C: Ixd, my dle, 0.33 pi *lo%, 400 vdcw C: fxd, cer dle, 0.01 pi *aO%, 1000 vdcw C: var. cer. 5-20 pf C: var. alr dlc, 12. 5 lo 535. 1 pf, 4 aect Not Assígned

C: fxd, molded mica. 39 pf *IO% C: fxd, cer dle, 0.01 pf &O%, 1000 vdcw C: fxd, dlpped mica, 270 pf *5% (332A onlp)

Dlodc. rectlfler. si, 50 nia *lv, 100 plv. 12 pf (Optlon 01 only)

IX1

Fl

F2

Ll. L2 L3 L4

Ml

RI 112 R3 1~4, R5 Rt3

R7 R6 119 R10

SI s2

S2c’l thru S2C5

S2C6 S2C7 S2CR S2CQ

S2ClO

1450-0048

2110-0026 2110-0031 2110-0011

914.0~0041 9170-0016 9170-0605

1120-0352 1120-0398

0767-0001 0687-4701 0666-3915 2100-I 736

0813-0029 0683-512s 0813-0029 068G- 1325

3100-0676 OO331-61802

0132-0004

0160-0205 0140-0152 0160-0956 016O-0990

0160-0205

L!ght, lndlcator, wlthout pleh-on retaincr

Fuse, 1/16 elo-blo (for 115 v operatlon) Fuse, 1.:32 alo-blo (for 230 v operation) Fuse. 5.4 ohms, 1;‘16 amp, 250 v max.

Coll, RF. 2.5 ph ~10% Inductor, shleldlng bead (332A only) Cotl. fxd, 1.6 mh (332A only)

Meter Meter, vu (Option 01 only)

R: fxd. 400 ohms *5%, 3 w R: fxd, comp, 47 ohms *lo%, 1./2 w R: fxd. comp, 3Q0 ohms &, 112 w ll: var, comp, 100 ohms. 3000 ohms *lo%, 2 w Not Assipned

R: fxd. 1 ohm +5’8, 3 w R: f.xd, 5.1K ohrus *5’% (332A only) R: fxd, 1 ohm ~5% 3 w R: fxd, comp, 1. 3K ohms f5’W, 1/2 w (332A only)

Swltch. function Swllch ass’y, sensltlvlty

C: var, trlmmer, 0.7 lo 3.0 pf

C: fxd, dlpped mica. 10 pf *5’å C: fxd, mica dlc, 1000 pf *5%, 300 vdcw C: fxd, dlp@ mica. 309 pf i5’“n C: fxd, dlpped mlca, 100 pf &J

C: fxd, dlpped mica, 10 pf k5”h

7-6

# See introductlon Lo this section

01772-2

.

Mcdel331A.‘332A Sectlon VII Table 7-l

TaMe 7- 1. Hcfercncr Dt~YlgnatIon Index (Ctml’tl)

REFERENCE )ESIGNATION + PART NO. DESCRIPTION NOTE

S2Rl s2R2 s2R3 S2R4 S2R5

S2R6 8287 S2Rti

63

S3Cl 83C2 and

s3c3 s3c4 s3c5

S3C6

s3Rl s3R2 s3R3 93 R4 s3R5

S3RíI s3R-7 SSRB S3R9 nnd

S3RlO

S3Hll S3R12 63R13 S3Rl-l 54 S4Cl

S4Rl

s4R2

0698-3118 0698-3119 0757-0843 0698-3120 0757-0662

0698-3121

2100- 1438

00331-61903

0132-0004 0140-0180

R: fxd. rnL%t flm, 3.24K ohms fl’?., 1 ‘2 w R: fxd, mct flm, 6.98K ohmu fl’r:, 1’2 w R: fxd, mct flm, 22. 1K ohms fl’y:, 1.‘2 w R: fsd, met flm, 69. BK ohms il’?:. 1 ‘2 w R: fxd, met flm, 221K ohms *lis, 1’2 w

R: fxd, met flm, 69RK ohmtl kl?, 1 2 w Nut Atiislgncd R: vnr. lin taper, 1K ohm ilO?.. put

Switch aes’y. meter rangr

C: vûr, trlmmer, 0.7 to 3.0 pf C: isd, mica dle. 2000 pf j%., 300 vdcw

0140-0021 C: fxd. mulded mica, 39 pf *Itu”, 0140-0146 C: ixd. mlca die. 82 pf *5’f,, 300 vdcw

0121-0039 C: var. ccr trimmer. H - 50 pf

0686-2215 R: fsd, comp, 220 ohma *5’?, 1 .‘2 w 0698-3136 R: fxd, met flm, 277.5 uhmu ií ‘4%. 1:4 w 0698-3139 H: Ixd. mat flm, 410.26 uhmtl +1.‘4?, 1.‘4 w 0698-31311 R: fxd, rnet flm. 277. 5 ohms ~1 .i4’i., 1’4 w 0698-3139 H: fxd. mct Ilm, 410.26 uhmu *1;4’í.. 1 ‘4 w

0698-3138 R: fxd, met flm, 277.5 uhmtl *1!4’i., 1’4 w 0698-3139 R: fxd, met flm, 410.26 ohmu *1,‘4’:.. 1.‘4 w 0688-3138 R: fxd, met flm, 277.5 ohms *1!4?., 1 ‘1 w 0698-3139 R: Ixd. mcmt flnr. 410.26 uhms *1./4%, 1!4 w

0698-3137 06Q8-3146 0696-3145 0663-1005 00331-61904

R: fsd, me1 flm, 189.7 ohms *1/41,, 1.‘4 w H: fsd, mcl flm, 99QK ohms *1/4%, 1’4 w R: Ixd, me1 flm. 1K uhm kl ‘-l’:., 1/4 w R: fxd, comp, 10 ohms l 5’%, li4 w 5’It~.h aas’yv. FREQ. RANGE Part of FREQ. FUNGE swllch a&y (nut sqlarntrly

replaceable) Par1 of FREQ. RANCIE switch ass’y (not s~~prall~l\

rrplacrdblc) Part of FREQ. RANGE Ywltch asa’y (not separately

rcplaceable)

s4R3

S4R4

S4R5

S4R6

84R7

S4R0

Part of FREQ. RANGE swltch aeri’y (not seprately rcpklccohle)

Part of FREQ. RANGE swltch aes’y (not sepaanlcly reylaceable)

Part oí FREQ. FfANGE switch atm’y (not rtepantely replaceahle)

Pdrt of FREQ. RANGE rtwltch asti’y (not scparately rephctible)

Par1 uf FREQ. RANGE ewitch ass’y (not separately rt+accable)

P;Lrt of FREQ. RANGE &witch asis’y (nnt separala~y rcpl3ccablc)

01772-2 7-7

Sectlon VII Table 7-1

Model 33lA./332A

Table 7-l. Referente Deeignntlon Index (Cont’d)

REFEHENCE UESIGNATION

,+ PART NO. I~ESCRIPTION NOTE

S4R9

SIR10

S4Rll

S4R12

S4R13

s4Rl4

S4R15

s4Rl0

S4R17

S4R18

S4Rl9

s4Rzo

Part of FREQ. RANGE swftch ass’y (not separately replaceable)

Pnrt of FREQ. RANGE switch aas’y (not separately replaceable)

Part of FREQ. RANGE swltch ass’y (no1 separotely rephceable)

Part of FFUZQ. RANGE switch PSE’~ (not separately replaceable)

Part of FfUiQ. RANGE switch ass’y (not sepnrately replaceable)

Part of FREQ. IUNGE switch ass’y (not separately replaceable)

Part of FREQ. RANGE switch ass’y (not eeparately replaceable)

Part of FREQ. RANGE switch ass’y (not eeparately replaceable)

Part of FREQ. RANGE swltch ass’y (not separately replaceable)

Part of FREQ. RANGE swltch asa’y (not aeparately replaceable)

Part oí FREQ. RANGE switch aas’y (not separately replaceable)

Part of FREQ. RANGE ewltch aas’y (not separately replaceable)

s5 3101-0036 Swltch, toggle, SPST. 3 amp, 250 vac-dc

Stl 3101-0033 Swltch, elide, DPDT, 115-230 v

s7 3101-0011 Swltch, sllde. DPDT, 0.5 amp, 125 vdc (332A only)

Tl 9100-0300 Traneformer. power

Wl 8120-0078 Cable a6s’y, power extra limp

MISCELLANEOUS

6lB-4OD-4

0340-0097 0340-0091 0340-0099

0340-0100

Plate. frequency dlal

lnsulator. MndlnK post. t ripie lnsulator, blndlng post, trlplc. with locatlng key lnsulator, single, blndlng post, 0.500” OD X 0.200”

ID X 0.90” thk lnsulator. elttgle, blnding post, 0.500” OD X 0.200”

LD X 0.090” thk

0370-0035 0370-0112 0370-0113

0370-0114

0370-0117

Knob, dlal, vernier Knob, sklrted bar, 31’4” dlam for 1 ‘4” diam shaft, black Knob, shlrted tmr, 3!4” dlam, for 1.‘4” diam shaft, black

eenaitlvlty Knob, red, wiarrow

Knob, aklrted, 3/4” dlam, for 1!4” diam ehaft, black, balance

i See intruduction to thls scctIon

7-9 01772-l

Model331A !332A Sectlon VII Table 7-l

Table 7-l. Rcference &signatlon Index (Cont’d)

MIECELLANEOUS (cont’d)

0370-0180

0380-0200 0510-0748 1251-0135

1251-1009

1400-0084

1490-0030

1500-0002 1510-0010 1510-0011

5000-0732 fiooo-0733 5020-0630 5020-0639 5040-0212

5040-0831 5060-0020 5060-0021 5060-0731 5060-0739 5060-0751 5060-0763 5060-0767 5000-0775 5060- 4916 00331-00101 00331-00102 00331-00103 00331-00104 00331-00201

00331-00202 00331-00601 00331-00602 00331-00603 00331-00604

00331-01201 00331-01202 00331-01203 00331-01204 00331-04001

00331-04102 00331-01301 00331-23701 00331-23702 00331-60701 00331-63601

00331-63602

Knoh, round. l-5 ‘6” dhm, black. for 1’4” dlam shaft, dlal

Standoff, hlngcd Holder, fuse. 3AG sIze, double pole Connector, príntcd cirrull. 15 contacts, for 1 ‘16” circuit

bwrd Conncctor, a<’ power cord receptacle

Hnldcr, fuse, cxtrnrtor post lype, for aingle 3AG c’artridgr furia

Stand, tilt. stninless steel red, 0.188” dtam

Yokr, cnupler, for 1 ;4” shaft Bindlng poti1 asu’y, red Insulator, wlth solder turret Uinding potil ilt(s’y, IJhLk

Cover, rear, tilde, 5 X ll Cover, front, slde, 5 X ll Dial, huh Hearlng. cap drlve IlltrUhtor. flcxiblc, coupled

Brackct, cap, mount Gear, ass’y Gear, ass’y Frdme ass’y, 5 X 11 covcr, top ass’y

Cover, bottom aes’y Handle ass’y, slde Fnot ass’y Klt, 5H rack mount Connectrrr ass’y w :shorling bar Deck. main Platr, cap muunt GuuspI, slde Guascl, centrr Panel, frunt

Panel, rea I Shteld. dlvlder Shield, SW IIIII~~~I~III Shield, SW range Shirld, powrr

L)mc~kct, LIUII~IJI-~ Brdckel, PC buard muunl, rear Bmcket, PC muunt Bracket, mountlng Dial plate

Shleld, bottom Phtr, panel, false Shüll, Itllt*1 Shaft, <;rp drlve Tunlng ass’y, frequency Shaft. uss’y, dlal, drive

Vcrrller drlvc ati~‘y

01772-a 7-9

Abdel 331A ‘332A Y

'IhlJlI~ 7- 1. I~~~lcrcnce Deslgnaation Index (Conl’d)

RE F’ERENCE DESICNATION

+ PART NO. DESCRIPTION NOTE

MISCELLANEOUS (cont’d)

00331-63603 Gear, ass’y. ldlcr 00331-63604 Gcar, ass’y, reduction fixed

00331-63605 Gear. ass’y. load 00331-90001 Manual

00333-01202 Bracket. pc mtg

# Sce Introductíon to tllls scction

7-11) 01772-2

Model 33lA./‘332A Sect ion VII Tahlc 7-2

Tablc 7-2. Heplaceahle Parta

r PART NO. DESCRIIVrION MFR MFR PAHT NO. TQ

61B-4OD-4 Plate, Irequency dial 26460 ölB-40D-4 1

0121-0004 C: var. air dle, 12.5 to 535.1 pf, 4 sectionn 28480 0121-0004 1 0121-0039 C: var. cer lrlmrner, ti-50 pf 72982 557-062-U2PO- 1

34R

0130-0006 C: var, imor, 5-2U pf 72982 503-000 B2WWR 1 0130-0017 C: vnr. cer, 8-50 pl 72982 557-OlQ-UZPO- 1

34R

0132-0004 C: var. trlmmer, 0.7 to 3.0 pf 72982 535OOQ-4R 6

0140-0014 C: Ixd, rnolded mica, 56 pf ~10% 04082 RCMlSE56OK 1

0140-0031 C: fxd, molded mlca, 39 pf *lo’*0 04062 RCMlSEJQOK 2 0140-0041 C: fxd, molded mica, 100 pf l 2’;, 04062 RChI15E(100)G 1 0140-0092 C: fxd, moldcd mlt,a. 240 pf 3 5”; 04062 HCM15E241J 1

0140-0145 C: fxd, dipped mka, 22 pf i5’a 04062 RDMlfiC220J5C 1 0140-0146 C: fxd, mica die, 82 pf *5’8, 300 vdcw 04062 DM15FEtl2O.J 1 0140-0152 C: fxd, mica dle, 1000 pf i5%, 300 vdcw 04062 DM16F102,J 1 0140-0156 C: fxd, dipp~ul mica, 1500 pf ~2’;) 04062 RDMlQF152G3C 1

0140-0180 C: fxd, mica dle, 2000 pf i2’s, 300 vdcw 14655 CDlQF2O26(3OOV) 3 0140-0190 C: fxd, dlp@ mica. 39 pf i5”; 04062 RDhl15E3QO,J3C 1 0140-0193 C: fxd, dipptul mka, 82 pf *5”; 28480 0140-0193 1 0140-0195 C: fxd. dippcd mica. 13-O pf ~fi’:, 2J3480 0140-0105 1

0140-0196 C: fxd, mica dic, 150 pf ~5”;1, 300 vdcw 28480 0140-0196 1 0140-0200 C: fxd, dippod mica, 3Q0 pf &I 04062 RDMl’JF391J3C 3 0140-0201 C: fxd, dippcd mica, 12 pf *5’% 04062 HDM15C12OJ5C 1 0140-0203 C: fxd, rnka dic. 30 pf &f, 500 vdcw 04062 DM15E3OkJ WOV 1

0140-0206 C: fxd, dlpped mica, 270 pf k5’7, 04062 RDM15F2’71JW 2 0140-0206 C: fxd, dipl>cd mica. 660 pf k5% 28480 0140-0206 1 0140-0218 C: fxd, dlyped mica, 160 pf +2’5 04062 RDMlSFl6IC3C 1

0150-0012 C: fxd, cer die. 10.000 pf &O’~. 1000 vdcw 5626s 2QC214A3 3 0150-0084 C: fxd, ccr dic. 0. 1 III +t!O’6 -20% 50 vdcw 562M9 33c41 1JldA 3

0160-0195 C: fxd, cer die, 1000 pf ~20% 250 ML’W 56289 19c251 1 0160-0205 C: Ixd. dlpw mica, 10 pf *5% 04062 RDM15ClOOJ5S 2 0160-0953 C: Ixd. tlie, 0. 33 PI ~10’8. 400 vdcw rny 28460 0160-0953 1 0160-0958 C: fxd, dipped mica, 390 pi *5% 04062 RDM15F391J3S 1

0160-0990 C: fxd, dlpped mira, 100 pf *2’7# 04062 RDM15FlOlG3S 1

0170-0021 C: fxd, dle, 0.0047 Ctf *lO% 400 vdLw mp 28480 0170-0021 2 0170-0040 C: fxd, dle, 0.047 /if *lo’% my 56280 192P47392A 1

0180-0022 56289 Obdll 2 0180-0033

C: fxd. elecl, solld tanta. 3.0 ef *lo%, 35 vdcw C: fxd, elcct, XI pf -10% +100’<1. 6 vdcw 56289 D32653 olxlY 2

0180-0039 C: fxd, elect. 100 PI, 12 vdrw 562&9 D32697 obdn 3 0180-0050 C: fxd. &lum elect. 40 pf -15..*L ~100’8, 50 vdcw 5ü2trl) D32538 oIdY 2

0180-0058 C: fxd. elect, 50 pf -lo‘<1 ~100%. 25 vdcw 56289 D28110 obdY 3 0180-0059 C: fxd, elect, 10 pf -10% &lOO’.?,, 25 vdcw 56289 301>106GO25BB4 2 0160-0060 C: fxd. elert, 200 ~1 -10% +lOO’%, 3 vdcw 56289 30D207GO03DC4 2 0180-0061 C: fxd, elect, 100 /uf +lOO’% -10%. 15 vdcw 56288 3OD107CO15DD4 4

0180-0062 C: fxd. elect, 300 pf -10% +lOO’b, 6 vdcw 56288 3OD137GOO6DH4 1 0180-0101 C: fxd, solld tanta dle, 1.8 pf ilO’%, 35 vdcw 28480 0160-0101 1 0180-0104 C: fxd, alum elect, 200 ,uf -10% +lOO%, 15 vdcw 56289 3OD207CO15DH4 2 0180-0224 C: fxd, elect alum, 10 pf -10% -175%, 15 vdcw 56289 30D106CXIl5BA4 1

0180-0305 C: fxd. elect alum, 1000 pf -lo’% +lOO%, 2. 5 vdcw 56268 34DlOfiH2R5FJI 1

01772-2 7-11

scct lon VI1 Table 7-2

Model 33lA’332A

5 PART NO.

Table 7-2. Replaceable Parla (Cont’d)

DESCRI PTION MFR MFR PART NO. TQ

0180-0307 C: fxd. elect nlum, 500 pt -lOy +lOO’h, 15 vdcw 50289 34D507H015 FJ4 3 0180-0308 C: Ixd, elect alum, 200 III -10% +lOO’h, 50 V&W 56289 34D207H050GLA 2

0340-0067 Insulator: blndlng post, Lrlple 28480 0340-0087 1 0340-0091 Lnsulator: blndlng pust, triple, with locattng key 28486 0340-0091 1 0340-0099 Insulator: slngle. blndtng p-t, 0.500” OD x 0.200” 28480 0340-0099 5

ID x 0 090” thk 0340-0100 Insula&: single. blndlng post. 0. 500” OD x 0.200’ 28480 0340-0100 4

ID x 0.090” thk

0370-0025 Knob, dlal, vernier 26460 0370-0025 1 0370-0112 Knob, ekirted bar, 3/4” dtam. Cor 1/4” dlam shaft, 28480 0370-0112 3

black 0370-0113 Knob, sklrted bar. 3/4” dldm. lar 1/4” dlam shaft, 26460 0370-0113 1

black, sensttlvtty 0370-0114 Knob, red, wiarrow 28480 0370-0114 2

0370-0117 Knob, sklrted, 314” dlam. for 1:‘4” dlam shaft, 28480 0370-0117 1 black. balance

0370-0160 Knob. ramd. l-5/8” dlam. black, Ior 1/4” dlam 28480 0370-0160 1 shaft. dial

0380-0200 Staluloff. hlnged 28480 0380-0200 2 0510-0748 Holder, fuse. 3 AG sizc. double pole 75915 obdl 0683- 1005 R: fxd, comp, 10 ohms f5’li 1.‘4 w 01121 CB1005 i 0683- 1015 R: fxd, comp, 100 ohmR +fi’%. 1/4 w 01121 CBJOJS 3 0683- 1025 R: Ixd, comp, 1000 ohms *5”i#, 1.‘4 w 01121 CB1025 2

0683- 1235 R: Ixd, comp, 12 K ohms *57* 1’4 w 01121 CB1235 1 0683- 1515 R: Ixd. comp, 150 ohms *fi’T% 11’4 w 01121 CB1515 2 0683-1535 R: fxd, comp, 15 K ohms *5% Ji4 w 01121 CB1535 1 0683-1815 R: Ixd, comp, 180 ohms 15% lj4 w 01121 CD1815 1

0683-2015 R: fxd, comp, 200 ohms *fi?+ 1;4 w 01121 CB2015 1 0683-2035 R: fxd. 2000 ohms *5’h. 1!‘4 w comp, 01121 CB2025 2 0683-2405 R: lxd. 24 ohms +5%, 1;‘4 w comp, 01121 CB2405 1 0683-2425 R: fxd. comp, 2400 ohms *5%, 114 w 01121 CB2425 1

0683-3016 R: fxd. comp, 300 ohms +5’?, 11’4 w 01121 CB3015 1 0683-3025 R: Ixd, comp, 3000 ohms f5’& 1.:4 w 01121 CB3025 4 0683-3635 R: fxd. 36 K &ms +5’?. 1:‘4 w comp, 01121 CB3635 1 0683-3945 R: fxd, comp, 390 K ohms *5’h. 1.“4 w 01121 CO3045 1

0683-4335 R: fxd. 43 K ohms *5’?,, 1.4 w comp, 01121 CB4335 1 0683-4715 R: fxd, comp, 470 ohms l 57. 1.‘4 w 01121 CB4715 1 0683-5 105 R: Ixd. 51 ohms +5’%, 1.‘4 w comp. 01121 CB5 105 1 0683-5115 R: fxd. 510 ohms *5’:. li4 w comp. 01121 CD5115 3

0683-5125 R: fxd, comp, 5100 ohms *5T:. 1:4 w (332A only) 01121 CB5125 1 0683-5145 R: fxd. comp. 510 K ohms +5’;., 1.‘4 w 01121 CB5145 1 0683-6215 R: fxd. 620 ohms +5%, 1:4 w comp. 01121 CB6215 2 0683-6815 R: fxd, comp, 680 ohms *5’?. 1;‘4 w 01121 CB6815 1 0683-6825 R: fxd, comp, 6800 ohms *5’%, 1’4 w 01121 CB6825 1 0683-7515 R: fxd. 750 ohms l 5%. 1’4 w comp, 01121 CB7515 1 0683-9135 R: fxd, 91 K ohms +5%. 1 ‘4 w comp, 01121 CR9135 1 0686- 1025 li: Lxd, comp, 1000 ohms *5’\. 1’2 w 01121 EB1025 3 0686-1035 R: fxd, comp. 10 K ohms *5%, 1’2 w 01121 EB1035 1 0686- 1235 R: fxd. comp, 12 K ohms +5’>. 1’2 w 01121 EB1235 1 0686- 1245 R: fxd, comp. 120 K ohms +5’h, 1.2 w 01121 EB1245 1 0686- 1265 R: fxd, comp, 12 M ohms +5’% 1:2 w 01121 EB1265 1 0686- 1325 H: fxd. comp, 1. 3 K ohme *5’% 1’2 w 01121 EB1325 1

0686-1515 R: fxd. comp. 150 ohms *5”; 1.‘2 w 01121 EBl515 1

7-12 01772-2

I See Introductlon to this sectlon

Model 331A/332A Scct ion VI1 Tahlc 7-2

Table 7-2. Replaceable F%trts (Cont’d)

r PART NO. DESCRIPTION MFR MFH PART NO. TQ

06861525 R: fxd, comp, 1500 ohms l 5%, 1;2 w 01121 EB1525 1 0686-2015 R: fxd, comp, 200 ohms í5% 1:2 w 01121 En2015 2 0886-2025 R: fxd, comp, 2000 ohms i5%, 1 ‘2 w 01121 EB2025 3 0686-2035 R: fxd. comp, 20 K ohms 15’8, 1.‘2 w 01121 EB2035 1

0686-2215 R: fxd, comp, 220 ohms *5%, 11’2 w 01121 Et32215 1 0686-2415 R: fxd, comp, 240 ohms *5’%. 1 ‘2 w 01121 EB2415 1 0686-2725 R: fxd, comp, 2700 ohms &5’Ú, l”2 w 01121 ER2725 1 0686-3015 R: fxd, comp, 300 ohms k5’71, 1 ‘2 w 01121 EB3015 1

0686-3315 R: fxd, comp, 330 ohms *5% 1’2 w 01121 EB3315 1 0686-3625 R: Ixd, comp. 3606 ohms *5’% 112 w 01121 EB3625 2 0686-3915 R: fxd, comp, 390 ohmtl k5%, 1 ‘2 w 01121 EB3915 1 0686-4705 R: fxd, comp, 47 ohms *5’6, 1’2 w 01121 ER4705 1

0686-5125 R: fxd, comp, 5100 ohms +5’k 1’2 w 01121 En5125 1 0686-5615 ll: fxd, comp, 566 ohms 15’9, 1 2 w 01121 ER561 5 1 0686-6825 R: fxd, comp, G600 ohms *5’:1, 1.‘2 w 01121 Et36825 4 0686-7525 R: fxd, comp, 7500 ohms 15’8. 1.‘2 w 01121 El37525 4

0687-3331 R: fxd, comp, 33 K ohms *lo%, li2 w 01121 EB3331 1 068’7-4701 R: fxd. comp, 47 ohms *lo’>, 1!2 w 01121 El34701 1

0698-3118 R: fxd, me1 flm, 3. 24 K ohms fl%, 112 w 19701 MF7C T-O obdll 1 0698-3119 R: fxd. me1 flm. 6.98 K ohms ~1% 1/2 w 19701 MF7C T-O oldr 1 0698-3120 H: fxd, met flm, BD.8 K ohms *l’% 1’2 w 19701 MF7C T-O obd;t 1 0698-3121 R: fxd, niel flm, 698 K ohms *l’B, 1’2 w 19701 MF7C T-O otdr 1

0698-3137 R: fxd, met flm. 189. 7 ohms *1.‘4’%, 1:‘4 w 19701 MFBC T-O otxt# 1 0696-3138 R: fxd, met flm, 277. 5 ohms *1:‘4’f1, 1.‘4 w 19701 MFRC T-O oldii 4 0698-3139 R: fxd, met flm, 410.26 ohms k1./4%, 1!4 w 19701 MFRC T-O obddB 5 0696-3140 R: fxd. me1 flm, 2.49 K ohms *l%, 1’2 w 10701 MF’IC T-O IIIMI# 1

0696-3145 R: fxd, niel flm, 1 K ohm k1 ‘4% 1.‘4 w 19701 MFBC T-O obdb 1 0698-3146 R: fxd, mct flm, 999 K ohms fl:4’b, 1.‘4 w 19701 MF6C T-O obd# 1 0698-3147 R: fxd, met flm, 191 ohms il’%, 1/4 w 19701 MF5C T-O obdl 1 0698-3174 R: fxd, carbon flm, 4.42 ohms *l’%, 1.‘2 w 94459 CVF otxtdll 1

0757-0346 R: fxd, met flm, 10 ohms *l%, 1:8 w 97913 0bdt 2 0757-0390 R: fxd, 36.5 ohms *l”o, 1./8 w 28460 0757-0390 1 0757-0755 R: fxd, mcl flm. í2. 1 K ohms *l’ó, 1,/4 w 19701 hZF6C T-O obdl 1 0757-0830 R: fxd, me1 flm, 3.92 K ohms *l’*n, 1/2 w 284110 0757-0830 1

0757-0836 R: fxd, met flm, 7.50 K ohms *l%, 1/2 w 28480 0757-0836 1 0757-0846 H: fxd, met flm, 22. 1 K ohms 11% 1.‘2 w 19701 MF7C T-0 oldr 1 0757-0862 R: fxd. met flm, 221 K ohms *l%, 1.‘2 w 19701 MF7C T-O c~l~lti 1 0757-0881 R: fxd, met flm. 12. 7 K ohms *l’.?~. 1.‘4 w 28460 0757-0881 1

0757-1102 R: fxd. met flm, 180 ohms kl”6, 118 w 19701 MF5C T-O obd4 1

0766-0029 R: fxd met flm, 10 ohms *5% 3 w T ‘C *250 PPM ;Oc

07115 LPI-3 obd8 2

0767-0001 R: fxd, 400 ohms l 5%. 3 w 28480 0767-0001 0813-0029 R: fxd, 1 ohm *5%, 3 w 91637 l-S-2B otxlw :,

1120-0352 Meter 28480 1120-0352 1 1120-0398 Meter, vu (Option 01 only) 28480 1120-0398 1 1205-0037 Heat stnk for A2Q4 98978 TXBF-OlQ-025R 1 1251-0135 Connector: prtnted ctrcutt, 15 contacts. for 1,/16” 000Xx SD-615 UR obd# 1

circuit bcard 1251-1009 Connector: ac cord recepacle poner 82389 AC- oh-IU 1

14OO-0084 Holder: fuse, extractor post type, for single 3AG 75915 342014 OMC 1 carlridge fusc

1450-0048 Llght: indicator, without push-on retaincr 08717 i358-R-C2A obdl 1

I Stt inlrtductlc~n to thls eectlon

01772-2 7-13

Sectlon VII Modcl 331A ‘332A Tablc 7-2

Table 7-2. Iteplaceable Parta (Conl’d)

r PART NO. DESCRIPTION MFR MFR PART NO. TQ

1490-0030 Stand: ttlt. stainless steel rod, 0. 188” diam 91360 obdb 1

1500-0003 Yoke. coupler. for 114” sbft 70487 Single yoke por- 2 llon of 39006 coupler

1510-0010 Blndlng pst ass’y: red insulator, with soldcr tur- 28480 1510-0010 4 rct

1510-0011 BMing post ass’y: black 28480 1510-0011 3

1850-0096 Transistor: germanium, PNP 01295 2N2189 1 1850-0111 Transistor: gcrmanium. PNP 01295 2N404A 2 1850-0158 Transistor: PNP, ~crmanium 04713 2N2635 2

1853-0009 TrPnaislor: si, PNP 01295 SM5727 3

1854-0039 TrnrWstor: NPN 86684 2N3053 4 1854-0042 Transistor: si, NPN 04713 SM1570 5 1854-0057 Transistor: sl, NPN 24446 16L64 obdu 2

1855-0004 Transblor: P channcl. FET 28480 1855-0004 1 1855~0006 Transistor: el. P rhannel. SU414A 28480 1855-0006 1

1901-0025 Diode: rcctlflcr, fti. 50 nia *l v, 100 piv. 12 pf 93332 D3072 obdff 2 1901-0026 Dlodc: si. 0. 5 amp, 200 plv 80684 34531 obdu 6 1901-0044 Dtode: rectifler, si, 20 ma + 1 v 07910 OtXl4 4

1902-0045 Diale: breakdown, 7.2 v &Z’%, 400 mw 04713 sz10939-144 1

1910-0016 Diode: germanlum. 40 v, 106 ma +O. 75 v OOOLE G718 obdl 1 1910-0022 Diode: germanium, 5 wtv, 3. 5 ns. 2 pf al 1 v 93332 ObdC 2

2100-0092 ll: var, comp, lin taper, 10 K ohm8 &O’h. 0. 15 w 11237 UPE-7ORE obddl 1 2100-0094 R: var, comp, lln taper, 50 K ohms +30%. 0. 10 w 11237 UPE-7ORE obclt 1 2100-0151 R: var. Un laper. 500 ohms *2%. 0. 15 w comp, 11237 UPE-7ORE obdt 1 2100-0206 R: var. ww, 50 ohms ilO’8 79727 E870 olxlff 1

2100-0227 R: var, ww, lln tapr, 20 ohms ilO’6 11236 Serics 110 obdl 1 2100-1434 R: var, lln taper. 1 K ohm i3O’b 11236 xQ6200 otdfl 1 2100-1435 R: var, Un taper. 3300 ohms *lo% 11236 QS200 dxfdW 1 2100-1436 R: var, lln taper, 10 K ohms &O% 11236 QS200 obd4 1

2100-1438 R: var, lin taper, 1 K ohm *lo’%. pot 11237 Series 45 0bdC 1 2100-1738 R: var, 100 ohms. 3000 ohms ilO%. 2 w comp, 71590 BAS 1209 obdc 1

2110-0011 Fuse: 5.4 ohms, 1.‘16 250 v max amp, 75915 4312-002 obdlr 2 2110-0026 Fuse: 1’16 SLB (for 115 v operation) 75915 x1149 obdt 1 2110-0031 Fuse: 1,‘32 SLB (for 230 v operation) 75915 313.031 obdt 1

3100-0878 Switch: functlon 76854 OMC 1

3101-OO11 Switch: elide, DPDT, 0. 5 amp. 125 vdc (332A 42190 4603 OMU 1 only)

3101-0033 Swltch: sltde, DPDT, 115-230 1 42190 4633 ohla 1 3101-0038 Swltch: loggle, SPST, 3 amp. 256 vac-dc 88140 828OK16 1

5000-0732 Covcr: rear, side. 5 x ll 28480 5000-0732 2 5000-0733 Cover: front, slde, 5 x 11 28480 5000-0733 2

5Om-0430 Dial: hub 28480 5020-0620 1 5020-0639 Bearinp: cap drive 28480 5020-0639 1

5040-0212 Innulator: flexible, coupled 28480 5040-0212 1 54X0-0631 Bracket: cap mount 28480 5040-0631 2

XIRO-0020 Gear ass’y 28480 5060-OO20 1 5060-0021 Cear aftR’y 28480 5060-0021 1 5080-0731 Frame ass’y: 5 x ll 28480 5030-0731 2

7-14

I See tntroductlon to thís sectton 01772-2

Model 33lAi332A Sec tlon VII Tüblt! 7-2

Table 7-2. Repbceable Parta (Cont’d)

.$ PART NO. DESCRIPTION MFR MFR PART NO. TQ RS

5060-0738 Cover: top as8’y 26480 5060-0739 1 0 5060-0751 Cover: bottom ass’y aE 5080-075 1 1 0 5060-0763 Handle a8s’y: slde 26460 5060-0763 2 0 5060-0767 Foc ass’y 26480 5060-0767 5 0

5060-0775 Klt: 5H rack mcunt 26460 5060-0775 1 0 5060-4916 Connector ati8’y 26460 5060-4916 1 0

8120-0078 Cuble aas’y: power. e.dra Jlmp 70903 KH-4147 obd% 1 1

9100-0300 Tranaformer: power 26480 9100-0300 1 1

9140-0041 ColJ: RF, 2. 5 mh *lOIb (332A onlg) 95285 SA-3500-I obd* 2 1 9140-0052 CoIJ: RF, 3. 3 mh (332A only) 08250 16-400 obd# 2 0

9170-0016 Inductor, shteldlng bead (332A only) 02114 56-500-65/3B 1 1 9170-0605 Coll: fxd, 1. 6 mh (332A onJy) 26480 9170-0605 1 0

00331-00101 Deck, matn 26460 00331-00101 1 0 00331-00102 Plate: caJI mount 26480 00331-00102 1 0 00331-00103 GUSBBL, std8 26460 00331-00103 1 0 00331-00104 Guaaet, center 26460 00331-00104 1 0

00331-00301 Panel, front 28480 00331-00201 1 0 00331-00202 -nel, rezar 26460 00331-00202 1 0 00331-00601 ShleJd, dlvlder 264ecl 00331-00601 2 0 00331-00602 ShleJd, SW functlon 26460 00331-00802 1 0

00331-00603 Shield, SW range 28480 00331-00603 1 0 00331-00604 ShieJd, powei 2M60 00331-00604 1 0 00331-01201 Bracket, support 26480 00331-01201 1 0 00331-01202 Bracket, PC marnt, rear 26460 00331-01202 1 0

00331-01203 Bracket, PC mount 26460 00331-01203 1 0 00331-01204 Brackel, mcruntlng 26460 00331-01204 1 0 00331-04001 Dial pJate 264Em 00331-04001 1 f-l 00331-04103 ShJcld, bdtom 28460 00331-04102 1 0

00331-04301 PJale, PneJ, falee 28460 00331-04301 1 0 00331-23701 Shaft ldler , 26460 00331-23701 1 0 00331-23702 Shaft, drlve cap 2t!460 00331-23702 1 0 00331-60701 Tunlng a~s’y. frequency 2Mka 00331-80701 1 1

00331-61902 Swltch ass’y, sensltlvlty 264t#1 00331-61902 1 1 00331-61903 Swltch asy’y, muter range 26460 00331-61903 1 1 00331-61904 Swttch iltly’y, FTIEQ RANGE 26460 00331-61W4 1 1 00331-63601 Shaft. uss'y, dlal, drlve 2tt4&0 00331-63601 1 0

00331-63602 Vernier drlve aes’y 28480 00331-63602 1 0 00331-63603 Mear LLYY’Y, IdJer 26480 00331-63603 1 0 00331-63604 Gear ass’y, reductlon. flxed 26460 00331-03604 1 0 00331-63605 Geor ass’y 1-d 26460 00331-83605 2 0

00331-66501 Board, etched circult ass’y, puwer supply 26480 00331-66501 1 1 00331-66502 Board. etched ckt ass’y, meter and Impd amp, 28460 00331-66502 1 1

conv 00331-66503 Board, etched ckt ass’y, rejecllon ampJlfler 26460 00331-66503 1 1 00331-66504 Bcard, etched ckl aäs’y meter anrpand impd conv 26460 00331-66504 1 1.

(optlun 01 only) 00331-90000 Manuill 26480 00331-90000 1 1

00332-66502 Fhxsrd, ctched rirrult ans’y, rf detector 26460 00332-66502 1 0

00333-01202 Brackct. rnlg I>C 28480 00333-01202 1 0

I Ser lntroductl~ln ti> thls SecticJn

01772-2 7- 15

Appendtx A APPENDIX Model 331Aj332A

CODE UST OF MANUFACTURERS (Shomt 1 d 21

The folkwtng code numben am from the hderal Supply Coda for Manufacturon Cataloging Handbooks H4-1 (Namo to Code) and H4-2 (Codo to Name) and thelr lates+ rup ments. tho bottom of each pago. Alphabetical codas r

The date of revisfon and the date of tho tupplements used appear a+ ave bsen arbitrarily assigned to supplisn not appearing in the H4 handbooks.

Mulel 331~~332A APPENDU CODE LKT OF MANUFACTURERS tShmt 2 of 2)

Appendix A

WI

AppmUx B Mdel 331A/332A i

HEWLETT-PACKARD SALES AND SERVICE OffICES In the United States and Canada

CEORâIA

iE-= “;s

hDrlW.Hf l404’2 1141 WA. 810751.3283

NEW JERSEY

fotntnm ~Mll547~2

Y- sn'r 39 GrIrrd Avtmle ool~ä7.3933

TEXAS

hlm. mm P ll Ebr 7166. xa5 Iw nd IZIJ’ 357.1681 nd 332ddb7 Twx 910114mI

w4m4tM.77027 P.0 kr :2813.4242 Richmond A- 1713'&7.2407 TYIX 713.571.1353 HAWAII

htb thujmd. CaYI. #IU4 5939 l.J~Larrkn mrd uln 617.1282 rnd 7e&BlI t-w 9i049Q2lm

ALASKA

kllnr. wrä. (101 116% RE Sm Street !íw 454.397l l-wx. 91a-44s2303

UTAH

ILLINOIS

Rdh. coa79 5wl lbaul SllC~l 13121677MM twx 910?23)613

APIZONA

SmnJth, m2al mm Ib SoYttwe Rd L6m94~7601 Twx w2.M90111

T~WL mm :32 So. lwurr EId. ffim 623 2554 IWX. 602.792-2759

tJEW YORK

kW vrt. 19611 2% Est 75th Slwl :212-l 0:9 2023 TWX 7lMdlJ376 Inhtu. laZa

~~~ZP,

~Bqsk. 12w R? Wa\hm

f Ion Slwl

rgl41454. 3)ù IWI 914452.!425

SyTKBBB. 13211 54% EJSI &tby Ud 13151454 2486 IWI: 7lOYI.M82 IIH#Illm4 1219 Crnprille Rd WI:1 7EM0Ba IWX. 510 2524ml

VIRGINIA

nkbrm. zun 211: Snncrr ao4d 1103\ 26X451 TWX 710.956 0157

INDIANA

li*srllL 4ww 3919 Nardor, Dr. ll171 546 4691 lw. 3176354rJl

CALIFORNIA

!i7hz!z Lid” I?IBb77.1~?md 76bãll tw 9loagg2l70

s4urrrt*mu1 2591 crkw Al. (916! 482.1463 nrr. 9l6-4uw3

SaB o*n nno1 ID55 wttn strnt 1!1412-22-6103 lWl 714.276.4263

hh ARB. wna Il01 Muca&-o Id 1415) 3sbMo lwx 9lU373.l,ão

LOUISIANA hwáham 1%) 5224359

WAsHltlGTOt4

Itnrvw. w Il656 II E 6th St cm: 454 3371 lwx. 910443.2303

MARYLAND bttkm. 2lñ7

!gy &“&R”

hcitim. za52 1:.m3 lnnbrti R-7 all 4?7.1560 rwx 7lOOzaw4

GOVEPNMEtJT CONlRACTltJ6 OFFICES

YlMWem Pa. t 7a51 Hcrlell P*:irld Conlrrrt Kwiclm# Dwsmn CHmrltd tlm 1:17\ 944.:401 twx 117.7a-k4816

vIe c@nrk+ktiB* PB. rwn Hwlrlt Prhard CP.hWI Y~rtellIq ONlw-Bl 144 Ctudrlh Strret cI51 ;53 ISIl lhx 2lMx-3M7

NORTH CAROLINA

RW hht 27202 IY3 Y Yam strnt (914’ RB2 Es!3 lWX 5109?6.1516

MASSACHUSETTS Irlwn 91w UKblr~: IUnplll !&17127:.9300 IW 71033X392

COLORADO OHIO

Chnbd. 44129 5519 Fea11 RNd (216’ OS4 9;09 1wx 116.811110715

wlm. 4w I.W W Ik*ulhy 14~ ül3~?99Dfl lwx. 513 wcwso

MICHIãAN swthtmu. 4mn 24315 Ilorthwtstrrn Hey ~31313539lM lwx. 31335744a COttNEClICUT

!iY%okY (33’ 346.6611 lwx 710428.‘~

CANADA

nmbU1 uwrbn tbwlett Puhnd ICm& Ltd 627ou wdsirHt (5141 7 2. 2273 WA. 6104:1.3484

nFm. mm* kwlclt Prctrrd ICmrdJ Lid. 1762 Cu11 Awwm t613 722.4 7 ?3 lWX 6lb5&?.1%2

1rnmtL Ombrh HewbtI.ParL?rd ICUMLI Ltd. 1415 Lmcnc4 IrcM Wnt 14161:4991% m. 610 492 ?M?

hrwlu. D.C. tkwlett.PKkd (Clti Ltd. 2164 w. &odrq ta41 7387520 rwl 610x?~M59

OKLAHOMA

II- Clll w51?3+7LK?

MINNESOTA st Pm1 59114 ?459 Unwr~ly Aw %lF 646 7991 lwx 91056337Y

FLOPIOA

Ylml. nrn 2-W li?rl’mtclt 7th SI 1305’ 6356161

OrInde. a2tw 6,‘l Cmn:~wrrrlth Cre I.WQ 4.7 5541 1111 33 ::5 1x4

st. htBrrbr& 1110) 410 1501’1 Ae btrbr~rr &sh c413’ 41.!1:11 1w 113391 txs

PENNSYLVANIA

clrl nIY cln 731.6791 ‘1~11 Cmhmkhn 19424 144 tllr*li RIIHI “151 2.18 IfM rnd &‘E&!nO iwr 215 Pd?4 3811 YmmwlHe. 1514 ‘555 Lh\r ;*k Rlvd Ll:!?ll5:.'7 IWX '10 :97.3FM

MISSOURI bma ctly. 94131 1916 Faw ftlect 1Rl61 444 9494 11x Rlh 5% ‘4’1 I ,

SI Lnris.UtU 314 %wlh Arcnlww.j Rlnl ‘~IJ’Gl:.43YI 1*x 314 !w 333

Appendix B

HEWLETT- PACKARD INTERNATIONAL OFFICES Eleutronlu Instrument Sales and ServIae

1

CHILE

~4~“&,

COtOMBIA

DENMARK lyr Mua lis Rm InI 24

ti 1.cm0 4i OO

FINLAND 11110 0; T ro Eu153 II ~rIIulIIIah! thll.&l Th 61133

FRANCE litmwl.Pr~wd Ftwuc 150 mwd. YISYN. rr1r I3t lel. 707 97 19

OERMANY tk*ltlt.PxLud vRr&tl gt”“;;s. liudwl 1

tkwkll Pwlrrd VW IWhMtJ Buro l+trrtnbHRurlrrrst 110 703 BoMLlgtn. wrtttnbtrp Ttl 6971 Htwkll P&wd Vpbn L!tl~nhudtc strtw u 1Mm utrlln XI IrI .!49?71

CCEECE K Ilxqmi% Klrf~s Squ*r. Alhtns 124 hl. 230.301

INMA Tlu stmtrlu MI-I CDcñprrn. ld 6. Ir BhrAw S+u bd. Mlrlrbld I Ttl ksl

lkl stnlllK Inshunnl cmwly. Ld II. Eldtn& fnl Ctkvlla I

IRAH Ttkom LU. PO ãu 1rJ12.1*m Id. 43&b

ISDAEL 1kclrcmcJ L E

Ti rñ#rklf Ltd

16K1twr~l~1 I TrIArir ItI: 3M2l 1.3

ITALY l+mtll.Pacbud IWw 9.p.A VaI8 Iwpwu $6. Hlrn 181.69 ls&115;6

lb&wPwLmd IWwt 5 PA Ptlum lttlu Pbwr yuti. 25. loauEu ltl 59 l? 544:s

JAfAN Y&qt’ar4’&tll.Ptiud Ltd 2270 IGIhlL&a*cM

KOREA

NETHERLANDS Htrkll Priud Rtnlu~ WV :;9$ Rwllrtrul. ~~lClc!.tm w

Li 13 .v PB Ud 13.54 9.9

NEW ZEALAND sr*rle Ll~lrmm II 2 I Lid 8 Malrpo Slltcl ys

““f J21 f 5. Axhlnd

NORWAY

PANAMA tkrlrorueo m. S A PO 0x4929 P- CltJ 5. P- Ttl. 30133

PERU

PORTUGAL TELKTRA Rw RcdII

s dr f-t 103

P.O. BOI L 31. lhboa 1 lrl. 68 60 72 ti u 60 73 wd 66 60 74

PUERTO RICO 1 VIRCIN ISLANDS Sr kn fltcttD!ak& Inc IW Pwt k LemI. SlcQ 3 P.O. Bol 5167 Plr d( lwrrt SM. SM *XI OO906 TH. 753342. 7244#6

SfAlN AlAlO. Imor trawt Lumia 12. YdrU 6 Ttl 235 41 u &-d 235 43 45

SOUTH AFRICA F. H. flmlrr L Co IPI{ ). Lid Rowllt Huru ~;,lwvl k fllttl. c.w Tmn

Y

SWEDEN HP Inrllw¡tnt M CMlralr~M 23. wnr. cultrurn Tbl: 63 (r(l n HP Irnllunral AB y$uwd” 284 ret 27 bs wud27b901

SWI~~ERLAND u8I Prul Flty Wmuxlft!d~llnu 66. Btrw Tll. ‘0311 41 m 78

TLIWLN (FORh40SA) Hw Shtrl Lltclwr Co. Ltd 21 f#tnL, Wcrt IloJa. l/lMl 181 4 CJI 4 s3s 2

TUPKEY

UNITED KINCDOM htzltll.PYCHd III Durr Rd. 9+dlwLl GlRlwd ltl. Bt-Jltid E-M?

Appendix C

# MANUAL BACKDATING CHANGES Model 331A/33

Model33lA/332A

Distortion Analyzer

Manual Serial Prefixed: 331A - 536 332A - 536

-hp- Part No. 00331-90001 * This manual backdating sheet makes this manual applicable to earlier instru- ments. Instrument-component values that differ from those in the manual, yet are not listed in the backdating sheet. should be replaced using the part number given in the manual.

Model 331A Model 332A Instrument Serial Prefix Make Manual Changes Instrument Serial Prefix Make Manual Chan

536- <

427- 1

CHANGE #l Figure 6-l: Change RF Input Circuitry to the following:

L -J rh -- -- Mm Table 7-l:

Page 7-6: Change A4 board, -hp- Part No. from 00332-66502 to 00332-66501. Add A4L3. A4C4 and A4Rl on A4 pc board. Delete C9, -hp- Part No. 0140-0206, C: fxd dipped mica 270 pf

*5% (332A oniy). Use description for A4C4. Delete RlO, -hp- Part No. 0686-1324, R: fxd comp 1.3 K ohms

15% 1/2 w (332A onlv). Use description for A4Rl. Delete L4, -hp- Part No. 9170-0805; Coil: fxd 1.6 mh (332A only).

Use descript onforA4L3; change-hp- Part No. to 9170-0461. Paae 7-9: Change Shield: bottom, -hp- Part No. 00331-04102 to Plate: cover,

-hp- Part No. 00331-04101.

Page 7-10: Delete Bracket: pc mtg, -hp- Part No. 00333-01202. Delete Standoff: hinged, -hp- Part No. 0380-0200.

Page 7-11: Change TQ for 0150-0012 to 1 and add 0150-0052, C: fxd cer die

0.05 pf l 20’% 900 vdcw. Supplement B for 00331-90001

w el 331A/332A Appendt. C

td Manual Backctattng Changes Model 331A./332A Page 2

Mo&1 33l.A Model33M

‘W strument Serial Prefix Make Manual Changes Instrument Serlal Preftx Make Manual Changes

53s Ma11ual w

517 and w4- 1

lf HANGE #l (Cont’a) Table ‘l-2, Page ‘7-15:

Change -hp- Part No. 00332-66502 to 00332-66501. Change -hp- Part No. 00331-04102 to 00331-04101 and descrtptlon

to Plate: cover Delete Bracket: pc mtg, -hp- Part No. 00333-01202. Delete Stancbffz hinged, -hp- Part No. 0360-0200.

Value of C7 and C8 (paz? oI yr)wer input filter) In these lnetrumenta le 0.05 /lf. If replacemcnt of elther LS requlred, replare both wlth part number given In manual. -.

B

I pplement B for 00331-90001

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