| 摘要 |
A microwave spectrum analyzer comprising a first mixer which provides beats between the output of an YIG oscillator and the spectrum to be analyzed. A second mixer carries out a fixed transposition of said beats. The said YIG oscillator is locked to harmonics of the frequency of an auxiliary oscillator controlled by a phase-frequency comparator. The latter is adapted to receive on the one hand the frequency, divided by N of a synthesizer, and on the other hand, the beats between the frequency of said auxiliary oscillator and that of a crystal oscillator.
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