Batboard

the Channel Steering on the rear connector can you set it up to do up down channels or can it only be set up to go to a preset set channel

I'm pretty sure it's only capable of mode select 1-4. I use it now for a paging input which must be on F1, and a remote mic which is on F2. Works well!

The inputs are binary coded, so you can get channels 1-15 for binary codes 0001 - 1111, code 0000 gives you the last selected channel. I think a 0 is open and 1 is grounded, not positive about that though. There are tone remotes available that will output the correct codes, or you could use a binary coded switch or make up your own specialty circuit.