Disclosure to Promote the Right To Information

Whereas the Parliament of India has set out to provide a practical regime of right to information for citizens to secure access to information under the control of public authorities, in order to promote transparency and accountability in the working of every public authority, and whereas the attached publication of the Bureau of Indian Standards is of particular interest to the public, particularly disadvantaged communities and those engaged in the pursuit of education and knowledge, the attached public safety standard is made available to promote the timely dissemination of this information in an accurate manner to the public.

इंटरनेट मानक

“!ान $ एक न' भारत का +नम-ण”Satyanarayan Gangaram Pitroda

“Invent a New India Using Knowledge”

“प0रा1 को छोड न' 5 तरफ”Jawaharlal Nehru

“Step Out From the Old to the New”

“जान1 का अ+धकार, जी1 का अ+धकार”Mazdoor Kisan Shakti Sangathan

“The Right to Information, The Right to Live”

“!ान एक ऐसा खजाना > जो कभी च0राया नहB जा सकता है”Bhartṛhari—Nītiśatakam

“Knowledge is such a treasure which cannot be stolen”

“Invent a New India Using Knowledge”

है”ह”ह

IS 2032-20 (1977): Graphical symbols used inelectrotechnology, Part 20: Radio communicationtransmission circuits, lines and accessories [LITD 6:Wires, Cables, Waveguides and Accessories]

IS t 2032 ( Part XX ) - 1977

Indian Standard GRAPHICAL SYMBOLS USED IN

ELECTROTECHNOLOGY PART XX RADIO COMMUNICATI0N.S TRANSMISSION

CIRCUITS, LINES AND ACCESSORIES

Basic Standards on Electronks and Telecommunication Sectional Committee, LTDC 1

Chairman MAJ GEN K. K. MEHTA ( RETD)

D-304 Defence Colony New Delhi 110024

Members Representing

SHRI D. C. BHATTACHAREE Institution of Electronics and Telecommunicatinn Engineers, New Delhi

DR V. P. KODALI ( Alfemafc) DR K. CHANDRA National Physical Laboratory ( CSIR ) , New Delhi DIRECTOR Department of Science & Technology, New Delhi DR C. G. KHOT Railway Board ( Ministry of Railways )

SHRI RAVINDRA NATH (Alternate ) DR V. K. MISRA Department of Electronics ( Electronics Commission ),

New Delhi SHRI C. S. R. RAO All India Radio, New Delhi COL G. K. RAO Bharat Electronics Limited, Bangalore REPRESENTATIVE Posts & Telegraphs, New Delhi SHRI K. N. TIWARI Ministry of Deface

MAJ S. R. LUKTUKE ( Alternate ) SIIRI N. SRINIVASAN, Director General, IS1 ( Ex-oficio Member )

Director ( Electronics ) ( Sectetary )

Electronic Equipment Sectional Committee, LTDC 4

Chairman SHRI S. N. MITRA All lridia Radio, New Delhi

Members RESEARCH ENGINEER, ALL INDIA RADIO (Alternate to

Shri S. N. Mitra) ASSISTANT DIRECTOR, ELECTRICAL Naval Headquarters

EKCINEERINQ ( DESIQN ) ASSISTANT DIRECTOR, ELECTRICAL

ENCINEERINQ ( MATERIAL ) ( Alkrnate ) ( Continued on page 2 )

@ Copyright 1977

@IDIAN STANDARDS INSTITUTION

This publication is protected under the Indian Copyright Act (XIV of 1957) and reproduction in whole or in part by an means except with written permission of the * publisher shall be deemed to be an in rmgement of copyright under the said Act. P*

IS : 2032 ; Part XX ) - 1977

( Continuedfrom page 1 )

Members Representing

SHRI H. K. L. ARORA All India Radio andElectronics Association, Bombay S~IRI R. G. KESWANI ( Alternote I ) SHRI A. K. GHOSH ( Alternate II )

SHRI H. V. BADRINATH Wireless Planning and Co-ordination Wing (Ministry of Communications :

SHRI A. M. JOSHI ( Alternate ) SHRI N. DAYAL Directorate General of Inspection ( DGI ) ( Ministry

COL N. KUMAR ( Afternate) of Defence )

SHRI S. K. DUTTA Bharat Electronics Ltd, Bangalore SHRI S. STEPHEN ( Alternate I ) SHRI G. S. CIIA,~DRASEKHAR ( Alternate II )

DEPUTY DIRBCTOR GENERAL Overseas Communications Service, Bombay DIRECTOR ( Alternate )

SHRI N. GANESAN All India Instrument Manufacturers’ and Dealers’ Association, Bombay

SHRI V. K. VXSUD~VAN (Alternate 1 SHRI B. P. Gnosa SRRI K. C. GOURISWANKAR

National Test House, Calcutta Department of Electronics ( Electronics Commission ),

New Delhi J o I N T DIRECTOR STANDARDS

(S & T )-1 JOINT DIRECTOR STANDARDS

SHRl 4 SS&KT-zII ( Alternote )

Wa CD; j. S. LAMBA

SHRI A. V. RAJU ( Alternate ) &RI M. S. S. MURTHY

SHRI S. K. RAIZADA ( Alternote ( Bhopal )

Police Wireless ( Ministry of Home Affairs ) Directorate of Technical Development and Pro-

duction ( Air ) ( Ministry of Defence )

Bharat Heavy Electricals Ltd, Bhopal

I)

SHRI S. P. DESHPANDE f Afternate II 1

Railway Board, New Delhi .

( Secunderabad 1 SH~IY. P. MADAN'( Alternate III )

( New Delhi ) SHRI S. C. MAJUMDAR SHRI S. P. PURI SHRI C. S. RANQAN

Radio Receivers Subcommittee, LTDC 4 : 1, IS1 National Physical Laboratory ( CSIR ), New Delhi Electronic Measuring Equipment Subcommittee,

LTDC 4 : 2, IS1 DR M. K. RAO Panel for Interference Suppression Devices, LTDC

4/Pl, IS1 SHRI G. R. S. RAO The Radio Electronic & Television ‘Manufacturers’

SHRI V. RAMA SUBRAMANYM SHRI K. N. RAMASWAMY

SHRI B. BHANOT ( Alternate) SHRI D. K. SACHDEV

Association ( RBTMA ), Bombay Directorate General of Civil Aviation, New Delhi Dire;o;,te General of Technical Development, New

e *

Indian Telephone Industries Ltd, Bangalore SHRI N. S. SA~TIYANARAYANAM

( Alternate ) SHRIM. SANKARALINOAM Directorate General of

( Inspection Wing) SHRI P. T. KRISHNAMACHAR ( Alternate )

2

Supplies and Disposals

( Continued on jags 15 )

I3 t 2032 ( Part XX ) - 1977

hdian Standard l

- GRAPHICAL SYMBOLS USED IN ELECTROTECHNOLOGY

PART XX RADIO COMMUNICATIONS TRANSMISSION CIRC’UITS, LINES .AND ACCESSORIES

0. FOREWORD

0.1 This Indian Standard ( Part XX ) was adopted by the Indian Standards Institution on 27 June 1977, after the draft finalized by the Basic Standards on Electronics and Telecommunications Sectional Com- mittee in consultation with the Electronic Equipment Sectional Committee had been approved by the Electronics and Telecommunications Division Council.

0.2 It is common in electrical and clcctronic cnginccring practice to employ graphical symbols to denote the various means and devices used when making diagrams of connections. The connecting devices and the points where they make contact with the apparatus may be indicated in the diagram. With the object of standardizing the symbols to meet the various needs of the electrical and electronic industry, as far as possible, based on symbols internationally agreed, a series of standards is being formulated.

0.3 This standard is one of a series 01 Indian Standards on graphical symbols used in electrotechnology. A list of Indian Standards so far published in this scrics related to electronics and telecommunication is given on page 16.

0.4 In the preparation of this standard, assistance has been derived from the following publications issued by the International Electrotechnical Commission:

IEC Pub ll /-13 (1969) Recommended graphical symbols: Part 13 Block symbols for transmission and miscellaneous applications.

IEC Pub 117-13A (1971) First supplement to Pub 117-13 (1969) Recommended graphical symbols: Part 13 Block symbols for transmission and miscellaneous applications.

IEC Pub 117-13D (1976) Supplement to Pub 117-13 (First edition- 1969 ) Recommended graphical symbols: Part 13 Block symbols for transmission and miscellaneous applications.

IEC Pub 117-14 (1971) Recommended graphical symbols: Part 14 Telecommunication lines and accessories.

3

IS : 2032 ( Part XX ) - 1977

1, SCOPG

1.1 This stimdard ( Part XX ) covers graphical symbols for radio communication transmission circuits, lines and accessories.

2. LINES

2.1 Basic Symbols

2.1.1 Line, Circuit, Cable or Radio Line - Gcncr,~l symbol.

NOTI? 1 -A dashed line may be used to identify a radio link or a~ radio section of a circuit.

NOTE 2 - Aerial symbols may be placed at the radio terminal points.

f ---

2.1.2 Radio Link CR +

Y_____Y

!&2 Qualifying Symbols

2.2.1 To Indicate Direction of Working or Propagation

’ NOTE -The arrows may be shown on an appropriate side of a block symbol or on a signal path,

2.2.1 .l One-way . /

2.2.1.2 Both ways, not simultaneously . /

2.2.1.3 Both ways, simultaneously

2.2.2 To Indicate the Usage, of Line Circuit

2.2.2.1 Telephony F

2.2.2.2 Telegraphy and transmission OJ data T

2.2.2.3 Vision (, video ) of a television circuit V

2.2.2.4 Sound of a television or a music circuit S

4

. IS : 2032 ( Part XX ) - 1977

2.2.3 To Indicate the Type of ConsMction of Line

2.2.3.1 Underground line P

2.2.3.2 Submarine l&e

2.2.3.3 Overhead line A

2.2.4 To Itldic.nle Type of Line

2.2.4.1 Loaded line M

NOTE.- The inductance and the spacing may bc shown.

2.2.4.2 Coaxial line fi Y

NOTE - If necessary, the qualifying symbol may be repeated.

2.2.5 Examples

2.2.5.1 Telebhone line or circuit F

2.2.5.2 Radio link carrying television ( vision v+S+F

and sound ) and telephony f + __--

2.2.5.3 -Line with I77 mH loading at 1 830 m A_

1V'mH 1830m

2.3 Amplification in Lines

2.3.1 Two Lines with Undirectional AmpliJicalion

NOTE - The triangle is pointed in the direction of transmission.

2.3.2 Two Lines with Both Way Amplijication ( Two- Wire Circuit )

2.3.3 Four Lines with Both Way Ampl$cation ( Four- Wire Circuit )

5

IS:2032(PartXX)-1977

2.3.4 Four Lines Ty#e Circuit

2.3.5 Four Lines Terminal Ampt$er with Echo Suppression

2.3.6 Amplifier with By- Pass Used for Signalling and/or Power Feeding

2.3.7 Negative Impedance Both Way Ampl$ier

-+-a+ -A&- *

--

2.4 Delay Lines

2.4.1 Delay or Delay Line

NOTE 1 - The delay time may be indicated.

NOTE 2 -The length of the delay symbol may be varied depending on its application.

2.4.2 Magnetostrictive Delay Line

2.4.2.1 With three windings, assembled rejrre- I 4 sentatior. umxf;;

NOTE -The winding symbols may be oriented as required.

2.4.2.2 Magnetostrictive delay line with one input and two outputs giving delays of 50 ps and IO0 ps respective&.

Detached representation. -’

a) Input 31 I t

b) Iktermediate output 1E 50us

I 4 ._ c) Final output

E MOIK

2.4.3 Coaxial Dtlay Line 1 I

h U h Y

6

IS : 2032 ( Part XX ) - 1977

2.4.4 Delay Line with Piezaelectric Transducers 4-k

2.4.5 Mercury Delay Line with Pie~oelectric Transducers

2.4.6 Solid Material Delay Line with Piezoelectric -

Transducers -i@-- -(jc

2;5 Lines Accessories ( Cable Fittings ) A

2.5.1 Cable Sealing End

2.5.2 Straight Through Joint Box

A w

oa 2.5.3 Junction Box for Three Cables

2.5.4 Junction Box for Four Cables

3. TMNSMISSION CIRCUITS

3.1 Basic Symbols

3.1 .l Equipment or Functional Unit cloRo

NOTE - A suitable symbol or legend shall be inaerted in or added to the Ware or rectangle to indicate the equipment or function.

3.1.2 Signal Path

7

Is : 2032 ( Part XX ) - 1977

3.2 Qualifying Symbols

3.2-l To Indicate Direction of Working or Propagation -See 2.2.1.

3.2.2 To Indicate Transmitting ( Sending ) OY Receiving

3.2.2.1 Transmitting ( sending ) .

3.2.2.2 Receiving . .

NOTE - Such symbols may be shown on an appropriate side of a block symbol (sbc 4.4.3 and 4.4.4).

3.2 -2.3 Transmitter ( sender )

3 3.2.4 Receiver

3.2.3 To Indicate Signal Waveform

-cl

NOTE -The qualifying symbol may indicate the approximate shape of the wavc- form. In the subsequent clauses, the symbol ia shown above signal path. Further information may also be given [see 3.2.3(f)].

3.2.3 S P?ritive-going pulse

3.2.3.2 .Negative-going pulse

3.233 Pulse of alternating current

3.234 Positive-going step function

3.2.3.5 Negative-going step function y___

3.2.3.6 Positive-going pulse with a pulse dura- lion of 2 ps and a pulse repetition frequency of 10 KHz

8

IS : 2032 ( Part XX ) - 1977

3.2.4 To indicate the Type of Pulse-Modulation

3.2.4.1 Prtlse-josition or fkdse-t?hase modulation

3.2.4.2 Fulse-frequency mcdulution

3.2.4.3 Pulse-am$itude modulation

3.2.4.4 Pulse-interval modulation

3.2.4.5 Pulse-duration modulation

3.2.4.6 Pulse-code modulation

NOTE - Details of the code shall be shown.

a) Pulse-code mbdulation showing Iunit binary code

b) Pulse-code modulation showing 3-out-of-7 code

3.2.5 To indicate Carriers and Their Sidebands

3.2.5.1 Frequency modulation

3.2.5.2 Phase modulation

NOTE -The arrow head on tbe vertical line,’ indicating the carrier, may be omitted if no confusion will result.

3.3 Non-Rotating Generators

3.3 .I Non-Rotating Generators - General symbol. a

G

3.3.2 Sine- Wave Generator, 500 Hz cl-

& 500Hr

3.3.3 Saw-Tooth Generator, 500 Hz

9

CS : 2032 ( Part XX ) - 1977

3.3.4 Pulse Generator

3.3.5 Variable Frequenv Sine- Wave Generator

3.3.6 Noise Generator

cl- Jt

cl- ;? G cl- kT

NOTE -I; = Boltzmann’s constant.

T = Absolute temperature.

3.4 Changers

3.4.1 Changer - General symbol. VI

NOTE 1 - The direction of changing may be indicated by an arrow.

NOTE 2 - Appropriate symbols or legends should be associated with each half of the general symbol to indicate the nature of the change.

3.4.2 CC Converter --B-

3.4.3 Rectijer Equipment

3.4.4 Inverter

3.4.5 RectiJier/Inverter

-El- -

dzk

3.4.6 Piequency Changer, Changing from fl to fz 6

-Et- 12

3.4.7 Frequency Multiplier f

--lB nf

3.4.8 Frequency Divider f 0 t

10

IS : 2032 ( Part XX ) - 1977

3 A.9 Pulse Incerler

3.4.9.1 Pulse rPgellrruiol

3.4.10 Co& ConneTter, 5-Litlit Binmly Code to 7- lhit Bhry Code

3.4 .l 1 Char~ger Gi& C/ocli- Time Indication in 5- Utzit Bitzary Code

n ---La- U

A --IA- n

25 --la- 2’

3.5 Amplifiers

3.5.1 1~1jliJie1~ - General sylnbol. --D--OR Y-j@-

NOTE - The triangle is pointed in the direction of transmission.

3.5.2 Anlplifer with External Direct Current Control ( Rqhcc X by the controlled quantity)

3.6 Networks with Two Pairs of Terminals

3.6.1 Attenuator, Fixed Ltw ( Pad )

NOTE - The numerical vnlrtc of the attenuation may be added.

3.6.2 Attenuator, Variable Loss

3,6.3 Filter - General symbol. El

3.6.4. High Pass Filter .v

42-

11

IS : 2932 ( Part XX ) - 1977

3.6.5 Low-Pass /;‘i&rr

3.6.6 Batrd-l’clsr Filter

3.6.7 Band-Stop Filte,

3.6.8 Dellice far Yrc:er,,/Jtn.sir of IIigirer l+e- quencies

3.6.9 De& for De-eml,/iclsis of Higher Fre- quencies

3.6.10 Compessor

3.6.11 E.xpand?r

3.6.12 Artificial Line

3.6.13 Phase-Changing JVetwork

NOTE - ‘p may be replaced by B if no confusion arises.

-Et

--a- % -El rU-

2 cl- Y u-

-cl- \ -

u- / - -El--

-m- 3.7 Terminating Sets and Hybrid Transformers

3.7.1 Terminatin,? Sets

3.7.2 Babxing .Network

12

IS : 2032 ( Part XX ) - 1977

3.7.3 Terminating Set with Balancing .hfetwork

3.7.4 Hybrid Transformer

3.7.5 Asymmetric ( Skew ) Hybrid Transformer, Shown with Balance

3.7.6 Equijment for Connecting a 4-Wire Input to Either a ZWire Output or a 4-Wire Output Depending Upon the Receipt of a Control Signal -Fl-

3.7.7 Mixing Desk ( Broadcast Mixer)

3.8 Modulators, Demodulators and Discriminators

3.8 .l Modulator, General symbol.

Demodulator or Discriminator -

vu

3.8.2 Modulator, Demodulator or Discriminator Input and Output Signals X Y

NOTE 1 -X and T represent the modulating or modulated signal input and the modulated or -P demodulated signal output. z

NOTE 2 - 5 represents the input of the carrier-wave if required.

3.8.3 Modulator, Demodulators, Discriminators - Qualifying symbols.

NOTE -Qualifying symbols may be placed as shown below:

For a modulator at: A or o =, input modulating signal, B or b - output modulated wave, and C or e = carrier input.

A_

C

For a demodulator or discriminator at: A or a = input modulated wave, B or b = output signal, and C or c - carrier input.

13

IS : 2032 ( Part XX ) - 1977

3.8.4 Modulator, Double Side-Band Output

3.8.5 Pulse Code Modulator ( 7-Unit Binary Code Output )

3.0.6 Demodulator, Single Sideband Suppressed Carrier to Audio

3.9 Delay Lines ( see also 2.4 )

-Ym- NOTE - Block symbols for delay hnes are described in this clause.

3.9.1 Delay Line - General symbol. NOTE 1 - The type of delay line may be shown by

using the appropriate qualifying symbols.

NOTE 2 - This symbol may be.used also to represent delay devices or delay elements of any kind.

w 3.92 Magnetostrictive Delay Line

3.9.3 Magnetostrictive Delay Line with One Input and TWO 0,utputs Giving Delays at 50 ps and 100 ps

3.9.4 Coaxial Delay Line

3.9.5 Solid Material Delay Line with Piezoelec- tric Transducers

3.9.6 Mercury Delay Line with Piezoelectric Transducers

3.9.7 Artijcial Line Used as a Delay Line

14

9

Ft i”l

I

--Et-

IS : 2032 ( Part XX ) - 1977

( Continuedfiom page 2 )

Members Refiresen ting

SHRI R.L. SETH1 RadiJ Transmitters Subcommittee, LTDC 4 : 4 DRY. V. SOMAYAJULU The Test and Evaluation Centre ( NPL), New Delhi

SHRIP. SURYANARAYANA (Alternate) SHRI N. SRINIVASAN, Director General, IS1 (I&-oO;cio Member,

Director ( Electronics )

Secretary

SHRI P. N. AMLEKAR

Assistant Director ( Electronics j, IS1

15

INDIAN STANDARDS

ON

G~CIW~syMBA~~NWLATING TO ELECTRONICS &

IS :

2032 Graphical symbols used in electrotechnology:

2432 ( Part I )-1962 Classification and definitions of diagrams and charts

2032 ( Part III )-1962 ,Circuit elements and variability

2032 ( Part VIII )-I965 Semi-conductor devices

2032 ( Part IX )-1969 Electron tubes ( other than microwave tubes )

2032 ( Part XII )-1969 Electra-acoustic transducers and recording and reproducing systems

2032 ( Part XIII )-1971 Microwave tubes

2032 ( Part XIV)-1971 Microwave technology

2032 ( Part XVI )-1972 Aerials

2032 ( Part XVII )-1975 Symbols for ferrite cores and magnetic storage matrices

2032 ( Part XX )-1977 Radio communications transmission circuits, lines and accesso+s