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Method and means of minimizing simulcast distortion in a receiver when using a same-frequency repeater
Method and means of minimizing simulcast distortion in a receiver when using a same-frequency repeater
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机译:当使用同频转发器时,使接收机中的同播失真最小的方法和手段
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摘要
Simulcast distortion in a receiver when using a same-frequency repeater is minimized by applying double modulation to a signal that is broadcast to the same-frequency repeater. A voice signal is applied without delay as AM on a carrier to a modulation index of up to 30%, and the same signal is also applied as FM on the same carrier with a time delay equal to the time delay in the same-frequency repeater. The same- frequency repeater detects the AM and applies the detected signal as FM on a carrier that is rebroadcast. Received FM signals are thus delayed by substantially the same amount whether they are received from the original broadcast or the same-frequency repeater.
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