DEVICE FOR AUTOMATIC SEARCH OF RADIO STATIONS Russian patent published in 1997 - IPC

FIELD: radio engineering. SUBSTANCE: device has reference frequency unit 1, receiver 2, recorder 3, frequency synthesizer 4, N strip line filters 5, N threshold gates 6, first register 7, second register 8, comparison unit 9, programmable read-only memory unit 10, inverter 11, clock oscillator 12, wide-band antenna amplifier 13. This results in possibility to detect radio station when it is scanned using several fixed frequencies by means of storing states of signals in whole range of frequencies used by radio station until transmitter alters its working frequency in order to compare band after this alternation. Receiver is tuned only to frequency which contains signal in given moment. EFFECT: increased probability of detection of communication channels which use frequent alternation of operating frequencies. 5 dwg