SU573767A2 - Apparatus for measuring input signal frequency of panoramic receiver - Google Patents

Description

(54) DEVICE FOR MEASURING FREQUENCY

INPUT SIGNAL PAN RAMIA

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A signal from the output of the panoramic radio receiver is fed to the input 12, a signal from the heterodyne of the panoramic radio receiver is fed to the input 13, and a signal from the vector carrier of the spectra of the ranges of the panoramic radio receiver is fed to the input 14.

The panoramic radio receiver to the blocks included in it is not in the drawing.

The device works as follows. In the multi-radio package. In the receiver, the local oscillator is tuned by a pilob. different voltages within its working frequency range Lrr. At the end of each heterodynamic tuning cycle, during the return stroke of the saw-tooth voltage, ts the same, the synchronizer generates a command to connect the next carrier of the frequency spectrum spectrum. A full cycle of tuning the panoramic radio receiver is composed of the tuning of the hemodion, and the range of measured frequencies

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During the reorganization of the heterothers of the radio receiver from the filter 3, a sequence of pulses is received, formed by beats of instantaneous-25 frequencies of the local oscillator with reference frequencies. The number of pulses arriving at counter 6 via the controllable key St "unambiguously determines the difference in the frequency of the input radio signal to the initial frequency of the connected zo range. For an unambiguous reading of the true value of the frequency of the signal from the synchronizer output of the range carrier switch, a command is sent to switch 8 at the end of each cycle of tuning the local oscillator of the radio receiver. As a result, an alternate memory block of the shoe is connected to the resetting and setting the pulse counter. In this case, the code dialed by the counter in the previous heterodyne rebuilding cycle 40 is reset, and the code set in the switched-on memory block is written to the counter. This code corresponds to the initial

the frequency of the frequency range to be monitored (reviewed) on the next cycle of tuning the local oscillator of the radio receiver. In the process of rebuilding the heterodyne, the number of pulses coming from the output of the filter 3 is summed with the recorded code on the frequency of this range. As a result, the code of the true frequency of tuning the radio receiver is dialed on the counter, i.e. frequency of the received radio signal.

In the proposed device, the range of measured frequencies is wider than in the known one n times, where rv is the number of radio receiver Ranges. In this case, the neo-eigenvalue of the reference of the frequency of the incoming radio signal is excluded, since the switching of the carriers of the spectra of the radio receiver ranges is synchronized with the switching of the code memory and, accordingly, with the overwriting of the codes of the initial frequencies of the ranges on the pulse counter.

Claims (1)

Formula invented and A device for measuring the frequency of the input signal of a panoramic radio receiver by aut. St. No. 47155О, which is so that, in order to increase the range of measured frequencies and eliminate the ambiguity of counting the frequency of the input signal of a high-frequency radio receiver with switchable frequency range spectral carriers, code memory blocks are inserted for each band frequency and the switch, the information inputs of which are connected to the outputs of the memory blocks of codes, and the control input of the switch is connected to the synchronizer switch of the spectrum carrier of the range of the panoramic radio receiver, and The d switch is connected to the reset unit and the initial installation of the counter.