[App_rpt-users] Simplex node with RPi and discriminator audio

[ARS W5OMR]

I'm using an old Motorola R100 repeater.  It's got the DCS option that can
not be turned off.  I'm running it on  a Pi3B, and usbradio and full duplex
with no issues, and fixing to add a 2m node to it, on simplex, with the
antenna on top of the db-413 who's base is at 50'.

It is the setup I had at my previous residence sans the rpi3b.

Gonna be interesting.

73 = Best Regards,
W5OMR / 29655

On Sun, May 5, 2019, 20:41 Kevin Custer <kuggie at kuggie.com> wrote:

> Keith,
>
> I've run usbradio on many Raspberry Pi 3's without issue.  The 3B+ works
> fine with 2 nodes on usbradio, but I don't really recommend it.   I also
> don't recommend a CM119B based radio adapter for usbradio deployments
> for several reasons.
>
> Kevin
>
> On 5/5/2019 2:36 PM, Keith Williamson wrote:
> > I'm wondering if this is a realistic configuration for a simplex node:
> >
> > RPi3 with DMK URI connected to the 9600 audio in and out signals of an
> > Alinco DR-135T. I want to be able to use CTCSS so that random signals
> > don't get bridged to connected nodes.
> >
> > My concern is that with the above configuration, the CTCSS decode in
> > the radio is bypassed. Consequently, CTCSS decode needs to be done via
> > usbradio since simpleusb does not have this capability. However, I
> > keep hearing that usbradio is not handled well with an RPi and yields
> > less than ideal audio quality.
> >
> > So all of the above implies that I either use a higher performance
> > node PC or continue to use the RPi, switch to the 2400 audio in and
> > out signals (so that the Alinco can handle the CTCSS) and use simpleusb.
> >
> > Opinions?
> >
> > Thanks,
> >
> > Keith
> > KF7DRV
>
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