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 0.2V 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 AC Output BNC connector for amplified output Input connector BNC (F) Frequency 1000Hz + 10% Power 230 volts A.C + 50 Hz, mains supply
Ghaziabad, Uttar Pradesh, India
