I've found that not every I/O pin in the 16 pin accessory connector is
created equal, though Pin8, IIRC is one of the "good ones". The bi-
directional ones are a bit goofy since regardless of input or out put
configuration, both sets of electronics are connected, but I've had
more problems with "output only"... Especially the one marked for an
alarm/siren output.
On Jun 17, 2008, at 11:06 AM, skipp025 wrote:
> I am building a large repeater system here in SE Kansas for SkyWarn
> and I am wanting to use the RVS-8 Voter.
>
> Our system uses Motorola Maxtracs for pretty much every aspect
> of our giant 15 county coverage repeater.
>
> Has anyone successfully used Maxtracs with this Voter? If so,
> how did you interface them?
Rear panel connections throught the 16 pin jack. Like most people.
In the case of Kenwood TKR-820 Repeaters I had to make my own
interface board.
> The voter has room for up to 8 sattelite receivers. I have a
> bank of UHF Maxtracs all tuned to different frequencies as the
> link receivers. They are all identical, and have 16 pins on the
> rear. I had planned to use PIN 8 COR and PIN 11 audio to feed
> the voter. COR is in ACTIVE HI on the Maxtracs, as such in
> the voter.
Might be better to build and include a simple logic buffer
circuit. One properly selected and applied fet or transitor
circuit would probably work very nice.
> The trouble I am having is getting PTT through the voter to be
> consistant, and by this I mean, only light PTT when there is an
> incoming COR signal from one receiver. It seems like the COR
> light on the voter is pulsing all the time, and when a good COR
> is detected, the COR on the voter goes solid and I can see the
> SNR counter go up when I talk through it.
You probably need to isolate the COR/COS output line (pin 8) with
the simple buffer circuit I mentioned. The description reads like
you're getting some type of logic pin dc interaction between the
radios and the voter.
> Anyone have any ideas?
I try not to...
> Thanks advance,
> Tyler
> K0FCQ
Reply back to us if you need specific information about how to
isolate the radio logic output line from the voter. I myself like
active low logic lines where possible.
cheers,
s.
--
Cort Buffington
H: +1-785-838-3034
M: +1-785-865-7206
