SU513377A1 - Device for recording and reproducing a phase-modulated signal - Google Patents

Description

(54) DEVICE FOR RECORDING AND PLAYBACK

PHASE MODULATED SIGNAL 12

The joi of source 1 enters the phase modulator 3, the output of which by phase (dou; 1irov (signal signal (fig. 3)) goes through the filter 13 to another input from the third block 4. The carrier frequency modulator jpOB 2 and 3 ravia Wo and TD is correspondingly. From the output of block 4, the total signal through the recording amplifier 5 is mapped onto a magnetic carrier.

The reproduced signal through the amplifier 6 and the filters 11 and 12, the output of which filtered signals are output (Fig. 3 5 and Fig. 3 3), goes to demodulators 7 and 8. Demodulators 7 and 8 select pulses (Fig. 3d and Fig. 36), of which, in accordance with the clock pulse mn (Fig. 3 of block 10, block 9 selects a code sequence in which the signals of the modulators 2 and 3 and, accordingly, the original seagins are arranged with a time seal (Fig. 3 J).

Formula and J о b)) е 1 е Н и

A UII device for recording and reproducing a phase-modulated signal, containing a signal source connected to two modulators, the first of which is connected to a complex block associated with a recording amplifier, and a playback amplifier connected to two demo devices through bandpass filters, the first of which is The first one is high frequency and the second is high frequency, characterized in that, in order to temporarily seal the channels, a third low pass filter is included in it that is connected between the second modulator and the adder unit a catcher connected to the demodulator outputs, and a synchronization unit associated with the output of the first filter and the control input of said code extraction unit.

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