[App_rpt-users] RTCM squelch tail elimination?

[David McGough]

Tim,

app_rpt can't do STE on receive since that is a transmitter function. But,
chan_usbradio does provide a means to chop off the squelch tail using an 
audio delay. This is exactly how it's done on most stand-alone 
analog controllers these days.

See the parameter: rxsquelchdelay in the usbradio.conf file.

I can confirm this does work, I use it on several Kenwood repeaters.  
Note that you must use flat audio (rxdemod=flat) for rxsquelchdelay to
work, since the "flat" setting turns on most of the DSP code. Setting
rxsquelchdelay=150 will solve most squelch crash issues, in my
experience.

73, David KB4FXC



On Sun, 20 Apr 2014, Tim Sawyer wrote:

> Simpleusb has nothing to do with RTCMs. You should not have a 
simpleusb.conf on your system if your only interface is a RTCM. 
> 
> When you have set the RTCM COR type = 1 the squelch tail comes from 
your radio, or rather the Doug Hall voter in your case. As far as I know 
there is no STE setting anywhere in app_rpt or any of it’s channel 
drivers including chan_voter.
> 
> Have you considered connecting RTCMs to your receivers and let them 
vote in place of the Doug Hall?
> 
> --
> Tim
> :wq
> 
> On Apr 20, 2014, at 12:53 PM, Sam Nabkey <sam.nabkey at gmail.com> wrote:
> 
> > 
> > Hello all...
> > 
> > I have replaced a repeater controller with a RTCM and a  server.
> > 
> > All is well but for a heavy squelch tail after carrier drop.  I am using the unit in simple mode because  I do not have an active discriminator output because I am using the RTCM behind a Doug Hall voter.
> > 
> > I have Googled the subject to death and I see plenty of mentioned items regarding simpleusb and usb settings but nothing on voter configuration.   Am I missing something someplace?
> > 
> > Thanks in advance for all the information.
> > 
> > You all are some of the smartest folks I know.  
> > 
> > Sam K8SN
> > 
> > 
> >     
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