[App_rpt-users] Need help - Unexplained noise at startup or asterisk restart

Doug Kingston dpk at randomnotes.org
Fri Apr 14 22:34:08 EDT 2017


Thanks everyone. I believe this is now working.  Indeed, the carrierfrom
setting in simpleusb.conf was 'no' and needed to be 'usbinvert' for an
Arcom 210.  I also needed to change the duplex setting in rpt.conf from 2
to 0 (for use with a multiport controller like our Arcom).

-Doug-

On Fri, Apr 14, 2017 at 7:55 AM, Pawlowski, Adam <ajp26 at buffalo.edu> wrote:

> If I had to take a guess, it is that your COR or PTT lines from your Pi
> controller arrangement are normally low or whichever state (not an
> electronics guy) that it is not in until the apparatus is initialized by
> bringing the system online. App_rpt can generate some noises at startup,
> like, an announcement, IP address playout, etc, and it could sound like
> noise if this is blown way out with your tx volume way up to compensate for
> RX being too low, but, then your courtesy tones or other things would sound
> like exploding static as well.
>
> I have run into the line thing trying to retro this in place of a device
> with an embedded controller or modifications that were made by others in
> the past. Maybe that is it?
>
> Adam
> KC2YQF
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