| 摘要 |
FIELD: radio engineering, radio dispatching points of monitoring to analyze signal situation within region, automatic search and detection of radio stations regularly changing their working frequencies. SUBSTANCE: for increase of probability of detection of communication channels with frequent change of working frequencies by observed radio stations device for automatic search has reference frequencies unit 1, receiver 2, detector 3, synthesizer 4 of frequencies, N band-pass filters 5, N threshold units 6, first register 7, second register 8, comparator 9, programmable permanent storage 10, inverter 11, generator 12 of clock frequency, wide-band antenna amplifier 13. This circuit makes it possible to identify observed radio station during its scanning over several fixed frequencies by storage of conditions of signal situation in entire range of frequencies used by radio station up to moment of change of working frequency by transmitter and its comparison with condition of range after change of frequency. Receiver is tuned only to that frequency on which signal appears at given time moment. EFFECT: increased probability of detection of communication channels with frequency change of working frequencies by observed radio stations. 1 cl, 5 dwg |
