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

Mon Dec 12 11:56:12 EST 2016

Doug,

Yes, the voltage does return to .5 immediately at the loss of a signal.
BUT.... after talking to Dave again this morning, I'm a bit confused (as
usual).

The COS is in play when David is transmitting TO his simplex node, right?
There is no delay there. Rather, when I (or anyone else) connects to Dave's
node, he has to wait for approximately 10 seconds after I have completed
transmitting to be able to talk. That's on the PTT side of the operation is
it not?

Another strange thing or two Dave mentioned: the very first transmission
after a station connects is fine - there is no delay. All subsequent
transmissions have the delay AND if Dave uses the iax_rpt client into his
node rather than RF, there is no delay...

John

On Sun, Dec 11, 2016 at 6:55 PM, "Doug Crompton via arm-allstar" <
arm-allstar at hamvoip.org> wrote:

> John,
>
>   You said this -
>
> (1) Checked COS voltage. Changes from .5 to 2.7V upon receipt of a signal.
>
> But the key thing is does it return to .5 right at the loss of signal or
> very close to it.  You need to check this because Allstar's COS determines
> end of signal on that voltage going back low. If it is not then that is
> your problem.
>
> As for wifi problems - this would have nothing to do with an RF incoming
> signal on an Allstar repeater listening on the output of that same
> repeater. Over the network it might be a different story but if the audio
> is clean thru the network the control signals should be working OK.
>
>
>
> *73 Doug*
>
> *WA3DSP*
>
> *http://www.crompton.com/hamradio <http://www.crompton.com/hamradio>*
>
> On Sun, Dec 11, 2016 at 4:44 PM, "John via arm-allstar" <
> arm-allstar at hamvoip.org> wrote:
>
> > 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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> > >
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> > >
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> > >
> > _______________________________________________
> >
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> >
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> >
> >
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