Remotely controlled C band signal generator

摘要

A highly accurate remotely controlled C band signal generator which provi a microwave signal to a boresight tower for the purpose of calibrating a radar system. The C band signal generator comprises a data receiver circuit for receiving a serial digital data frame having a plurality of eight bit digital data words and for converting the words from serial to parallel. A pulse repetition generator circuit responsive to one of the eight bit digital data words provides a modulating signal having a first or second pulse repetition frequency. The modulating signal when supplied to a pin diode modulator amplitude modulates the microwave signal which is provided by a voltage tunable oscillator. An attenuation driver circuit responsive to a second of the eight bit words provides an analog signal to a first attenuator which attenuates the microwave signal by one decibel steps and also provides a digital signal to a second attenuator which attenuates the microwave signal by ten decibel steps thus providing for attenuation of the microwave signal within a range of zero to eighty-one decibels. In response to three of the eight bit words a pair of phase lock loop circuits provide a stable voltage control signal to the voltage control oscillator thus assuring frequency stability of the microwave signal provided by the C band signal generator.