[arm-allstar] simpleusb / channel driver merge status?

[Richard Bateman]

Yeah, I'm using the URIx.  I'm having a couple of issues, but the one
I'm trying to deal with right now is basically that there is some kind
of noise that keeps keying up the repeater and we can't figure out
where it is coming from. It might well just be that it's RF noise and
we need to track it down, since I hear it when the repeater's squelch
opens and there is no signal to listen to, but on the spectrum
analyzer it's not strong enough to come out of the noise.

Sometimes it'll sit there kerchunking over and over again, multiple
times per second, despite the PL tone on the receive, and other times
it's quiet as you could ask for. Putting an extra ground wire as you
suggest sounds like it'd be worth a try to me =]

One reason I've been considering trying dsp-based is to find out for
sure if the issue is in the RF signal or if it's in the CTCSS/COR
signalling when they shouldn't (for whatever reason, whether the
radio, which is a TKR-750 version 1, or some electrical issue like a
ground loop).

Richard

On Sun, Oct 1, 2017 at 7:44 PM, David McGough <kb4fxc at inttek.net> wrote:
>
> Hi Richard,
>
> Are you using a URI or URIx audio adapter?  If so, I've had superior
> results by adding an extra, heavy-gauge ground lead to the URI. Then, I
> directly connect this lead to the repeater chassis--a screw on a Kenwood
> TKR repeaters...This has been my #1 ground-loop solution.
>
> Here are a few sample photos:
>
> https://hamvoip.org/kenwood-TKR/P1030817.JPG
> https://hamvoip.org/kenwood-TKR/P1030820.JPG
>
> Test TKR-750-2 repeater on bench:
> https://hamvoip.org/kenwood-TKR/P1030831.JPG
>
> ALSO -- on the TKR750/850 repeaters, make sure to notice that the 25-pin
> accessory plug has separate analog and digital grounds!
>
> If you've got RF or other noise issues with simpleusb telemetry, I doubt
> switching to usbradio DSP-based signaling will fix anything. Try running
> the TX into a dummy load and test, if possible.
>
> 73, David KB4FXC
>
>
> On Sun, 1 Oct 2017, "Richard Bateman via arm-allstar" wrote:
>
>> Hi,
>>
>> I've been having some issues that I'm starting to suspect might be
>> related to RF getting into my interface cables triggering my COR and
>> CTCSS lines (not in any way convinced, but it's on my list of
>> suspects) and have been toying with the idea of using usbradio instead
>> of simpleusb for awhile; last time I did that the audio was kinda
>> crappy, so I switched to simpleusb.
>>
>> While looking around I noticed that there is a "TODO" on the hamvoip
>> page about merging the channel drivers, which I assume might be
>> something along the lines of using DSP for COR and CTCSS detect but
>> using the other audio for actual TX?
>>
>> Anyway, I'm just wondering what the status of that is and if there is
>> any way I can help with the efforts; it would help me out a lot on
>> several different projects.
>>
>> Richard
>> _______________________________________________
>>
>> arm-allstar mailing list
>> arm-allstar at hamvoip.org
>> http://lists.hamvoip.org/cgi-bin/mailman/listinfo/arm-allstar
>>
>> Visit the BBB and RPi2/3 web page - http://hamvoip.org
>>
>