VOLTAGE STANDING WAVE RATIO (VSWR) METERS

VSWR

It is a high gain, voltage amplifier tuned at the center frequency of 1 KHz. It is used for measuring VSWR, attenuation and total mismatch of the line.

MODEL : VSWR 115 SPECIFICATIONS

Sensitivity : 0.2 µ at a 200 ohm input impedance for full scale deflection.

Noise Level : At least 5 dB below full scale at rated sensitivity and maximum bandwidth with input terminated in 100 ohm and 500 ohm for crystal low and high impedance respectively.

Calibration : Square law, meter indicates SWR in dB.

Range : 70 dB, input attenuator provides 60 dB in 10 dB steps, accuracy 0.2 dB per 10 dB steps Maximum Cumulative error 0.5 dB.

Scale Selector : Normal, Expand & 5dB

Meter Scale : 1 4 , SWR 3 10, Expand 1 1.3 dB 0 10, expand dB 0 2

Gain Control : Adjust the reference level, variable range 0 10 dB approx.

Input : “Bolo” bias provided for 4.3 mA low current bolo meters. “Crystal” 200 ohms for low impedance crystal rectifier and 200K ohms high impedance crystal rectifier as null detector.

Recorder Output : Socket provider for recording having 1V for full scale deflection, internal resistance of 1000 ohms or less.

A/C Output : BNC connector for amplified output.

Input Connector : BNC (F)

Frequency : 1000Hz 10%

Power : 230 Volts A.C. 10%, 50Hz mains supply.