Batboard

Ok here's one for everyone. I have a Motorola MTR2000, VHF, 100 Watt set up as a Base Station. I have a Motorola CDM750, Lowband 42-50, 60 Watt attached to it via a RICK Contoller to make a cross band system. Our department primarily operates on a VHF system and need to have access to a Low Band Frequency on a daily basis. However, this setup "need" has kinda of changed a little. What I would like to do with the equipment I have is have the ability, either with MDC, DTMF, whatever, be able to channel the steer the low band mobile to another channel and transmit/receive through that low band channel, off of the same VHF Frequency on the new channel. What this would allow me to do is add another frequency in the low band mobile radio that we now need to have the ability to talk on available through the VHF cross band system.

If anyone knows of a way to accomplish this, or needs more info, let me know.

I would be interested in doing this if the cost was mininal to do so.

Thanks,
Nick

Use an IP223 as your RICK for the crosspatch, and use it's inherent DTMF decode to control it's i/o to change modes on the low band CDM.

OK. I have never used one of these before. Can you shed some more guidance on how to do this and/or set this up? Also, is there a cheaper method? I saw the list price on this unit and its kinda pricy!!!

It's not that expensive, and you only have to buy it once. They are enterprise quality boxes. You can download the manual at the url below. There are also application notes with example cable schematics for the CDM. You will have to roll your own for the MTR.

http://www.telex.com/us/dispatch/downloads/d#manual

as long as mdc is being passed through your crossband, you could use the cdm's auxillary control outputs via mdc to control the aux input pins to select channels. you wouldnt need any other hardware.