[arm-allstar] Hang Time (?) Problem - K5FOY

[John]

Thanks for the guidance, Doug. So far, no joy.

*Summary of problem:*

If Dave is in QSO with another station, when that station stops
transmitting, PTT on his node stays up for 10 seconds after the individual
stops transmitting. Since it is a simplex node, this makes operation
difficult.

*What he has done:*

(1) Checked COS voltage. Changes from .5 to 2.7V upon receipt of a signal.
(2) Tested squelch. Squelch was off, but it WAS working correctly with the
squelch off.  Node is normally in CTCSS operation.
(3) Checked all wiring including connectors and plugs. Shortened wires
where possible, added ferrite chokes.
(4) Turned off all other devices on the wireless network to check for
interference. Tried a different router. Then tried the node with a direct
ethernet connection.

*Other Info (potential clues?)*

If Dave uses the IAX-Rpt client into his node rather than coming in via RF,
everything is fine - no delay.
If he issues *70 for node status the node returns  "repeat only". The node
number is not heard. If he is logged in with the IAX  client, the audio is
heard correctly. The same is true for any command that returns audio. For
instance, if he keys *A1 -  it returns only part of the IP address.

Any other thoughts?

Thanks!

John



On Thu, Dec 8, 2016 at 10:44 AM, "Doug Crompton via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> John,
>
>   It is possible that his hardware COS signal is not dropping for some
> reason. This often happens with squelch problems and noise on the input. I
> am assuming he is using simpleusb and hardware COS from the radio.
>
> The first thing to do is check the COS line - pin 8 on the DMK-URI - and
> see if it follows his input signal to the node. There could be a slight
> delay measured in milliseconds on key up/down but it should not be long.
>
> If that looks fine then we will go on with other things but if nothing else
> changed I am guessing that is what it is. If it does turn out to be that
> then you need to look at what the node RX is doing when he unkeys. Turn the
> volume up on the node radio and listen. He should be using PL. Even if he
> is using PL the squelch needs to be set properly.
>
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
> On Thu, Dec 8, 2016 at 12:32 PM, "John via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > I'm attempting to assist a friend with a problem that started on his Pi
> > node about a month ago. It acts as if the hang-time was increased to
> about
> > 10 seconds. Because it is a simplex node, he has to wait for transmit to
> > drop on every transmission. He had not made any software changes to his
> > node when the problem occurred. He tried booting with his  backup SSD
> (from
> > a time when everything was working properly) and still had the same
> > problem. He has added toroids on wires and cables - no change. The delay
> is
> > evident both on Allstar connections and Echolink. He is using a DMK URI
> > attached to a 2 meter mobile.
> >
> > Any thoughts on how to continue to troubleshoot this problem would be
> > greatly appreciated.
> >
> > Thanks!
> >
> > John
> > _______________________________________________
> >
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> >
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> >
> >
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