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Knowledge Base : FTM-100 no receive sound. Audio muted on FTM-100
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APRS Mute on FTM-100 is a real "GOTCHA!!"

With APRS Mute set to On, the radio will hear NOTHING. The speaker is muted for Band A and Band B even if you are working APRS on the other. If you are having trouble receiving a signal and Tone Mode