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The high frequencies used on scanner channels cross over into the area where there is a lot of random "white noise", a harsh, loud "hiss". Squelch turns the gain down below the hiss, but hopefully not below the signal. It has to be adjusted carefully, otherwise you eliminate the signal along with the noise.

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14y ago

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Have a police scanner and the 400 channels have a lot of static what can you do Do I need to buy a digital scanner?

You can try turning your squelch up. This will filter some of the static out. You can also program your scanner to only pick up channels that are relatively close to you. This will stop a lot of the static too.


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