FIELD: superhigh-frequency digital engineering. SUBSTANCE: frequency synchronizing circuit has first and second bias switching devices, first and second reference-signal generating devices, first and second dividers, first and second adders, first and second change-over control devices. Frequencies of transmitter local oscillator in superhigh-frequency digital system and of dielectric resonator parametron are synchronized simultaneously for use in vertical and horizontal polarization waves. Reference- signal generators are automatically changed over to ensure uninterrupted signal generation. EFFECT: improved reliability of frequency synchronization. 9 cl, 3 dwg
