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https://www.gpscentral.ca/manuals/Icom_IC-R8600_ENG_Manual.pdf Page 21 explains the difference between regular squelch and s-meter squelch on any Icom radio. Noise squelch The Noise Squelch allows the audio to be heard only while receiving a signal that includes less noise than a set level. Activates when the squelch level is set to between 30% and 50% in ...


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