Radio rings when no one is calling

Modified on Thu, 09 Nov 2023 at 03:29 PM

This is a result of using the Bell feature of a radio on a repeater. The Bell feature sounds based on a CTCSS tone, a DCS code or a CTCSS code pair which matches that set into your Decoder. (i.e., You have TSQL turned on, you have DCS turned on or you have EPCS turned on as Tone mode.)

Working through a repeater with tone control, you hear the ringing as a result of receiving is the repeater "squelch tail" at the end of a transmission (even one you did not send). This can happen when you are just monitoring the repeater and not actively talking. The "squelch tail" carries both the end of the signal AND the tone. Your radio is prorgammed to trigger the bell when it receives that tone... which it is receiving with this part of the signal.

With the tone attached to that signal, your radio rings in response. There may not be voice; but there is carrier and tone. That's all the radio needs for this feature.

This will happen any time the repeater transmits even if it is transmitting only it's ID.

Actually, this provides a new way to test that the repeater is transmitting the tone. If you hear the bell, you have the tone, and Tone Squelch will work for that repeater.

08/08/2013 03:46PM

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