P25 linked VHF and UHF for Dayton HAMvention - help

[myoung]

Hi all,
I want to put together a linked VHF and UHF p25 system for Dayton HAMvention 2011.

I am new at this so be kind.

I have a VHF quantar a UHF quantar and 2 DIU's and duplexers, a plan for install, antenna, etc.

So, what are the steps to make them link and work together?
Why, no good reason - so people with only a VHF or UHF can chat P25 to others on the other band....
..... HOW is the question.

I am certain many have already done this and know what to do, thus I am not interested in reinventing the wheel.

Thanks

Mark
N2OJD

[d119]

If it's all P25, just plug the two V.24 ports on the front of the station together with a crossover cable, and program the stations for RT/RT operation, and you've got an instant link. That's the most efficient way to do it, no DIU's required. This type of configuration was planned for by Motorola.

I'm unsure of the pinout of the crossover cable but it shouldn't be that difficult to figure out. In the Quantar RSS, under ASTRO Wireline configuration you'll see a pulldown to enable RT/RT operation, this is what allows you to link two Quantars together via the V.24 wireline "Port 1" on the front of each station as I understand it. This of course assumes you have V.24 wireline cards on the wireline board, but if you have DIU's I would assume you have this.

For mixed mode operation, I'm unsure if this works in analog mode, it likely does but you would also have to cross-connect the 4-wire lines on the back of the station to allow the analog audio to be passed.