VSWR METER

VSWR METER


VOLTAGE STANDING WAVE RATIO (VSWR) METERES

 

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

 

SPECIFICATION OF VSWR, MODEL SW-115

Sensitivity

0.2μV at a 200 ohms input for full scale deflection

Noise Level

At least 5 dB below full scale at rated sensitivity and maximum band width  input terminated in 100 ohms and 500 ohms for crystal low and high  respectively .

Calibration

 Square law, meter indicates SWR, dB

Range

70 dB, input attenuator provides 60 dB in 10 dB steps, accuracy + 0.2 dB per 10 dB steps Maximum commutative  error + 0.5 dB

Scale selector

Normal Expand and – 5dB

Meter Scale

SWR1-4,SWR 3-10 , expand SWR 1.1.3, dB 0-10, expand dB0.2

Gain Control

Adjust the reference level, variable range 0-10 dB approx.

Input

“Bolo” bias provided for 4.3 mA low current bolo meters

Recorder output

Socket provided for recording having 1 V 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 + 50 Hz, mains supply

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