Generator of meter waves '' GMV ''.
Instruments for adjusting and controlling the PTA.The generator of meter waves "GMV" has been produced since 1955. The device "GMV" is intended for checking and adjusting the radio receiving equipment of the VHF range, as well as for checking and adjusting the HF and IF paths of televisions. The device operates in the frequency range from 20 to 400 MHz. The maximum frequency setting error is 1.5%. The generator operates in the following modes: continuous generation; internal amplitude modulation with a sinusoidal voltage with a frequency of 1000 Hz; external amplitude modulation with sinusoidal voltage with frequencies from 60 to 8000 Hz; internal amplitude modulation with rectangular pulses with a duration of about 2 microseconds with a repetition rate of 1000 Hz; external modulation with rectangular pulses of 4 to 20 microseconds duration: at a repetition rate of 200 to 3000 Hz. The output of the "GMV" device is designed to connect a coaxial cable with a wave impedance of 75 Ohm, at the end of which the output voltage can vary from 4 µV to 50 mV. An external divider is attached to the device, which reduces the output voltage by 10 times. The calibration error of the output voltage in the continuous generation mode at a frequency of 40 MHz is not more than 10%. The maximum calibration error of the output voltage in the pulse mode is 30%. The device is powered from an alternating current with a frequency of 50 Hz, voltage of 127 or 220 V.
