MAINNOSCILLATORRFREQUENCY SYNCHRONOUS CIRCUIT

摘要

PURPOSE:To realize application to both independent and complete synchronization system by detectinag a frequency deviation between two signals and then by displaying it while calibrating automatically the frequency deviation. CONSTITUTION:Detector 12 detects a deviation between pilot signal fM of its own station and pilot signal f0 of the other station. Then, frequency deviation (epsilon) is digital-displayed by display part 13 and also applied to up/down counter 15 via a manual operation switch. Oscillation frequency fM of main oscillator 17 is controlled by the output of this up/down counter 15 and equalized to frequency f0 of the pilot signal of the other station.