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Fm - interlock circuit for a television tuner, wherein tv - and - reception of the fm tuner is possible with the same
Fm - interlock circuit for a television tuner, wherein tv - and - reception of the fm tuner is possible with the same
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机译：FM-电视调谐器的互锁电路，其中电视和-FM调谐器的接收可以使用相同的
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摘要
A television receiver includes a single tuner for tuning both television channels and broadcast FM stations. The tuner is operated at a fixed gain setting in FM reception mode. The tuner serves as the first conversion stage of a double conversion FM receiver, wherein the mixer of an FM radio integrated circuit serves as the second conversion stage. The arrangement operates at a specific and non-arbitrary first IF frequency. The FM receiver is also capable of automatically receiving National Weather Service broadcasts on that one of NWS's seven allocated frequencies which is operating in a listener's area. The receiver provides an on-screen display of the currently tuned FM channel number.
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