[App_rpt-users] Can't Change CTCSS input threshold on RTCM menu
Bryan at bryanfields.net
Mon Jan 9 12:17:06 EST 2017
>> On Sat, Jan 7, 2017 at 12:39 PM, Skyler F <electricity440 at gmail.com
>> <mailto:electricity440 at gmail.com>> wrote:
>> Unfortunately, on our CTCSS output, there is about 0.15 Volts when no
>> signal, and 5 when there is signal. The RTCM thinks that there is Always a
> On 1/9/17 10:47 AM, Tim Sawyer wrote:
> I don't think that ever got implemented in hardware... there's no DAC there.
Top posting is improper.
Try a 10k resistor to ground on that pin. If it's TTL logic it would make
that a hard 0 volts (or close enough to fool CMOS). I've had to do this
before a few times.
>From when I spoke to Jim about this last he was doing menu item this for
version 2 of the voter, but I believe that project never got to production. I
was asking for an independent setting of CTCSS level on transmit :)
If you're doing simulcast with the RTCM you'll need to sync the 9.6mhz clock
in it as well, or maybe not if you don't have a ton of overlap.
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