ET 91 comparision.pdf
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ET – 71 / ET – 91 Comparisons: General Data ET 71 A / ET 71 V / ETM 4 ET 91 Construction Generator, Receiver, Bridge separate All of them are in one instrument Application Up to 120 FDM channels Up to 600 FDM channels Dimensions ET 70 A: 350x220x200 mm ET 70 V: 350x220x200 mm ETM 4: 120x120x40 mm 224 x 160 x 44 mm Weight ET 70 A: ~9 kg ET 70 V: ~9 kg ETM 4: ~1 kg ~1.5 kg Temperature Nominal: +5..+45°C Operating: 0..55°C Storage, transport: –40 to +70°C Nominal: 0..+45°C Operating: -5..50°C Storage, transport: –40 to +70°C Power Mains From internal battery From car battery Mains From internal NIMH battery From car battery Display Level display: Galvanometer Frequency display: digital Level and frequency display is digital with 320x240 pixel graphic LCD display Memory Not available Memory locations for test results Memory locations for setups USB Interfaces PC connection is not possible USB 1.1 host port for USB stick USB 1.1 device port for PC connection PC Program PC connection is not possible PC program for result and setup transfer Operation Modes ET 71 A / ET 71 V / ETM 4 ET 91 Transmitting Provided Provided Selective Receiving Provided Provided Wide band Receiving Provided Provided Impedance Measurement With external adapter Provided Return Loss Measurement With external adapter Provided Balance Measurement With external adapter Provided Wide band Noise Measurement Not provided Additional Service Impulse Noise Measurement Not provided Additional Service Spectrum Analyzer Not provided Additional Service Master Slave Measurement Not provided Additional Service Multi Tone Measurement Not provided Additional Service NEXT/LOSS Measurement Not provided Additional Service Battery Quick Charge Not provided Additional Service Battery Regenerative Charge Not provided Additional Service Parameter ET 71 A ET 91 Frequency Range: 200 Hz...620 kHz Accuracy: 2x10-5 ±1 digit Resolution: ~1 Hz Range: 100 Hz... 2.4 MHz Accuracy: 2x10-6 ±1 digit Resolution: 1 Hz Input Impedance Symmetrical and Coax: 0, 75, 135 (125), 150, 600 Ω Symmetrical and Coax: 0, 75, 135(125), 150, 600 Ω Output Level Balanced: +10 to –50 dBm, dB Coax: +10 to –50 dBm, dB Balanced: +10 ... –50 dBm, dB Coax: +10 ... –50 dBm Level accuracy Balanced: ~ ± 0,5 dB Coax: ~ ± 0,6 dB Balanced: ~ ± 0,3 dB Coax: ~ ± 0,3 dB
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Transcript of ET 91 comparision.pdf
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ET 71 / ET 91 Comparisons:
General Data ET 71 A / ET 71 V / ETM 4 ET 91
Construction Generator, Receiver, Bridge separate All of them are in one instrument
Application Up to 120 FDM channels Up to 600 FDM channels
Dimensions
ET 70 A: 350x220x200 mm
ET 70 V: 350x220x200 mm
ETM 4: 120x120x40 mm
224 x 160 x 44 mm
Weight
ET 70 A: ~9 kg
ET 70 V: ~9 kg
ETM 4: ~1 kg
~1.5 kg
Temperature
Nominal: +5..+45C
Operating: 0..55C
Storage, transport: 40 to +70C
Nominal: 0..+45C
Operating: -5..50C
Storage, transport: 40 to +70C
Power
Mains
From internal battery
From car battery
Mains
From internal NIMH battery
From car battery
Display Level display: Galvanometer
Frequency display: digital
Level and frequency display is digital with
320x240 pixel graphic LCD display
Memory Not available Memory locations for test results
Memory locations for setups
USB Interfaces PC connection is not possible USB 1.1 host port for USB stick
USB 1.1 device port for PC connection
PC Program PC connection is not possible PC program for result and setup transfer
Operation Modes ET 71 A / ET 71 V / ETM 4 ET 91
Transmitting Provided Provided
Selective Receiving Provided Provided
Wide band Receiving Provided Provided
Impedance Measurement With external adapter Provided
Return Loss Measurement With external adapter Provided
Balance Measurement With external adapter Provided
Wide band Noise Measurement Not provided Additional Service
Impulse Noise Measurement Not provided Additional Service
Spectrum Analyzer Not provided Additional Service
Master Slave Measurement Not provided Additional Service
Multi Tone Measurement Not provided Additional Service
NEXT/LOSS Measurement Not provided Additional Service
Battery Quick Charge Not provided Additional Service
Battery Regenerative Charge Not provided Additional Service
Parameter ET 71 A ET 91
Frequency
Range: 200 Hz...620 kHz
Accuracy: 2x10-5 1 digit
Resolution: ~1 Hz
Range: 100 Hz... 2.4 MHz
Accuracy: 2x10-6 1 digit
Resolution: 1 Hz
Input Impedance Symmetrical and Coax:
0, 75, 135 (125), 150, 600
Symmetrical and Coax:
0, 75, 135(125), 150, 600
Output Level Balanced: +10 to 50 dBm, dB
Coax: +10 to 50 dBm, dB
Balanced: +10 ... 50 dBm, dB
Coax: +10 ... 50 dBm
Level accuracy Balanced: ~ 0,5 dB
Coax: ~ 0,6 dB
Balanced: ~ 0,3 dB
Coax: ~ 0,3 dB
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Parameter ET 71 V ET 91
Frequency Range Wideband: 50 Hz... 620 kHz
Selective: 200 Hz...620 kHz
Wideband: 100 Hz... 2.4 MHz
Selective: 100 Hz...2.4 MHz
Band Widths 20 Hz, 3.1 kHz 20, 200 Hz, 1.74, 1.95, 3.1 kHz
Terminated Inputs 75, 135 (125), 150, 600 5% 75, 135 (125), 150, 600 2%
Unterminated Inputs
Balanced:
300 Hz620 kHz 5 k
10 kHz..300 kHz 8 k
Coax:
3 k 50 pF
Balanced and Coax:
100 Hz... 2,4 MHz >20 k 30 pF
Measuring Range Wideband:-60 to +40 dB (With attenuator)
Selective: -90 to +40 dB (With attenuator)
Wideband:-60 to +40 dB (With attenuator)
Selective: -90 to +40 dB (With attenuator)
Minimum Readable Level
Selective: -120 dB
Wideband: -90 dB
Selective: -120 dB
Wideband
With 600 kHz filter: -80 dB
With 4 kHz filter: -100 dB
Measuring Accuracy
Balanced Input:
0 dB 20 kHz: 0,3 dB
Coax Input:
0 dB 20 kHz: 0,5 dB
Balanced Input:
0 dB 100 kHz: 0,2 dB
Coax Input:
0 dB 100 kHz: 0,2 dB
Auto Ranging Not provided In all measuring modes
Wideband Noise Measurement Not provided With 9 selectable filters
Impulse Noise Measurement Not provided Maximum 72 hours
Spectrum Analyzer Not provided
Minimum Readable Level: -140 dBm/Hz
Ranges
2.4 MHz
1.5 MHz
600 kHz
300 kHz
20 kHz
4 kHz
Parameter ETM - 4 ET - 91
Impedance Measurement
With external adapter
Frequency range:
300 Hz620 kHz
Measuring range:
50 .3000
Accuracy: 10% With built in bridge
Return Loss Measurement
With external adapter and
external normal resistance
Frequency range:
300 Hz620 kHz
Measuring range:
60 .1200
Accuracy: 1dB
With built in bridge and
Internal normal resistance
Frequency range:
200 Hz... 2,4 MHz
Measuring range:
60 .1200
Accuracy: 1dB
LCL Balance Measurement
With external adapter
Frequency range:
300 Hz620 kHz
Measuring range:
0.40 dB
Accuracy: 1dB
With built in bridge
Frequency range:
200 Hz... 2,4 MHz
Measuring range:
0.40 dB
Accuracy: 1dB
