Hi Sam, I forwarded your reply to the list. Yes, I agree that obtaining discriminator (flat) audio one way or another and then using software squelch is the best solution. 73, David KB4FXC On Sun, 20 Apr 2014, Sam Skolfield wrote:

FYI as a proud owner of a voted VHF repeater based on the RTCMS, they have excellent squelch action, and most of the time you can't even hear the slightest bit of a squelch tail at all! Perhaps there is a way to eliminate the squelch gating and de-emphasis in your DHE voter? This way you could feed voted discriminator audio into the RTCM to take advantage of it's onboard squelch circuit... Just thinking out loud.

On Sun, Apr 20, 2014 at 10:01 PM, David McGough <kb4fxc@inttek.net> wrote:

...

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@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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