| 摘要 |
A superheterodyne receiver includes a first mixer operative to provide reception on a nonpriority channel upon receipt of output signal from a first oscillator, a second mixer operative to provide reception on a priority channel upon receipt of output signal from a second oscillator. A switching system coupled with a pulse generator is connected to the first and second oscillators for alternately operating the first and second mixers. When the receiver receives the priority channel through the second mixer, the pulse generator is locked to inhibit the generation of pulses which would enable the first oscillator and mixer and to continually receive the priority channel.
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