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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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How do you pick up the police on a psr 250 scanner?

To pick up police frequencies on a PSR 250 scanner, first ensure the scanner is in "Scan" mode. You can program the scanner with local police frequencies by entering them manually or by using a computer to upload them if you have the necessary software. Make sure to set the appropriate trunking options if your local police use a trunked radio system. Finally, adjust the squelch and volume settings for optimal reception.


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