| 摘要 |
A circuit for the continuous measurement of the transmittance of phase synchronization loop, in which the output of the phase modulator connected to the signal generator is connected to the input of the measured phase synchronization loop, containing a spectrum analyser fitted with a tracing generator, characterized in that the output of the measured loop (3) is at the same time connected to one input of the frequency mixer (5) and with the input of the spectrum analyser (4), and the other input of the frequency mixer (5) is connected to the output of the tracing generator (6) of the spectrum analyser (4), where the output of the frequency mixer (5) is connected to the modular input of the phase modulator (2).<IMAGE>
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