Study of phase radiogeodetic systems with phase-locked loops

Phase type difference systems with a two channel compensation station are widely used in the creation of geodetic bases at sea. To increase the operating range of such systems and the accuracy of these measurements balance and single side band modulation is used in the reference channel. Synchronous detectors with phase locked loop are used for the same purpose. One effective method of expanding the interception band of phase locked loops is discrete phasing of the tuned oscillator by the input signal. The discriminating characteristics of an open phase locked loop with periodic phasing of the tuned oscillator by the input signal and a sawtooth phase detector characteristic is described. A basis for selection of operating conditions of a phase locked loop in a system which can help to optimize operating conditions of radiogeodetic systems is presented.