[arm-allstar] CTCSS during tail messages?

[Doug Crompton]

I explained this earlier. PL decoders have varying delay. When an incoming
signal drops and drops PL drops there is a delay before the PL decoder
detects this and drops COS. During this period any signal on the frequency
can "sneak" through as at that brief point you are in squelch mode only.
There is no fix for it other than using a faster response PL decoder or
reverse burst PL which many radios and decoders support.

http://www.repeater-builder.com/micor/reverseburst.html


*73 Doug*

*WA3DSP*

*http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*


On Fri, Apr 27, 2018 at 1:34 PM, "M M via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> I'm may not fully understanding the situation....  this is
> what I've decoded from the description ...
>
>  From your I'm understanding that your repeater is
> hearing the distant users on your repeater's input
> frequency...  correct?
>
> And your repeater receiver is running in tone decode mode?
>
> And you are hearing the user's transmission feeding through
> your repeater during the carrier delay time period?  (some
> people call this the hang-in timer)
>
> If so, it sounds like to me that the tone decoder is not
> muting the receiver audio path - that the audio path is
> in carrier squelch mode and the COR to PTT switching path
> is in tone mode.
>
> This may be fixable in the repeater programming or the
> repeater controller programming (if it is a external
> decoder). You didn't post the repeater or controller
> information, so I can't suggest anything further.
>
> Mike WA6ILQ
>
> On 4/27/2018 7:00 AM, "Tom Whiteside via arm-allstar" wrote:
> > A combination of spring time ducting and a newly coordinated repeater a
> 100
> > miles away has been creating a burst of their audio at the end of our
> > transmissions.   I've shorted the hang time down to 100ms but hearing
> this
> > going on for at least a couple of seconds and it is annoying.    We use a
> > tail message for weather nets that we set to a null message at other
> times
> > and am betting this is when they are coming in.   I'm wondering if there
> is
> > any way to keep the input tone qualifier during this period?
> >
> > Tom Whiteside N5TW
> >
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