[App_rpt-users] Motorola GM300 Transmitter PTT Issue With APP_RPT & DMK URI

[Bryan D. Boyle]

check the state level of your ptt signal.  iirc, the gm300 is a pull to ground, so you may have to invert it in the configuration.

--
Bryan
Sent from my iPad

> On Nov 4, 2013, at 1:51 PM, Andrew Sylthe <asylthe at kc9ona.com> wrote:
> 
> Hello app_rpt users,
> 
> I'm new to using app_rpt, and so far it looks like a great solution for a repeater controller.  I'm excited to get my system up and running, and linked into the Allstar Link Network.  I downloaded ACID from https://allstarlink.org/, and installed the distro quite painlessly.  I have the system setup to download my Asterisk configuration files automatically from AllStar Link.
> 
> I purchased a URI from DMK, and made my own custom cable following the example found here http://ohnosec.org/drupal/node/138 for a pair of Motorola GM300 8 channel radios.  I decided to go with the "Processed audio" configuration, and do have JU551 in position 'B' on the receive radio (and transmit radio for that matter).  I'm sending COR from the radio to the URI.
> 
> I wasn't able to run 'radio tune rxnoise' from within Asterisk.  I'm assuming that may not work because I'm using processed audio, not flat.  I found another post on this mailing list from some time ago indicating that to be true, but correct me if I'm wrong.
> 
> Here is the problem that I'm having:  The transmit radio becomes keyed as soon as Asterisk starts.  I'm not sure why the URI / app_rpt is setting PTT to high when the receive radio isn't receiving a signal.  The receive radio is setup to decode PL, and I've jumpered the mic hangup to ground (so the radio isn't stuck in monitor mode).  The transmit radio will eventually hit its TOT, and unkey.  I've spent a good amount of time scouring the internet for a solution to the problem before starting this email thread.  Any help would be greatly appreciated.
> 
> I hope that someone else has had this same problem, and that there is an easy fix.  If not, I'm happy to share any and all additional information necessary for a solution to the problem.
> 
> Thank you for your time in advance!
> 
> 
> -- 
> Andy
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