Abstract:
A first signal is supplied to a first resonance amplifier and the second harmonic of the first signal is supplied to a second resonance amplifier. The first resonance amplifier is coupled to the vertical deflection plate system of a cathode ray oscilloscope and to an input of a summing device. The second resonance amplifier is coupled to the horizontal deflection plate system of the oscilloscope and to another input of the summing device.
Abstract:
Method and apparatus for detecting both the magnitude and direction of any deviation in the pilot-subcarrier wave by conventionally separating the pilot carrier, regenerating and shifting its resultant signal by 90* and comparing it with a signal derived from the multiplex signal to produce a signal indicative of the magnitude of deviation. Simultaneously a reference signal is obtained from the original multiplex signal which is in phase with the comparison signal. The deviation signal and the reference signal are then demodulated to produce a directional voltage.