We use the BCD code method on the GM300 toggling four of the programmable pins on the accy jack. Using the RC-210's Aux ports, we program 15 macros to divide up the logic and have voice telemetry confirming the channel on the remote base.
Danny KD4RAA On Sun, Dec 28, 2008 at 3:20 AM, Mike Morris WA6ILQ <[email protected]> wrote: > At 10:57 PM 12/27/08, you wrote: > >> > The MaxTrac/GM300 radios use one of several methods for changing >> channels remotely: >> > >> > 1. one input line to revert to a known channel, >> > 2. two input lines: one to go UP, one to go DOWN, >> > 3. four input lines which you program with a binary code: 0000 >> thru 1111 to select the desired channel. >> > >> > Of the various methods, the one where you tell the radio which >> channel to go to is far more reliable. The others depend on you >> knowing where the radio is before you tell it to change because >> there is NO feedback of any kind. >> > >> > If you want something that's very user-friendly and may even >> provide feedback in some way, you're better off with an Icom, >> Kenwood, or Yaesu radio. The Motorola link radios you're using just >> don't have what you want. >> > >> > Bob M. >> >>On the GM300 we are using we >>programed it so we can change >>channels remotely thru the accessory >>jack using pins 6,8 and 9 if I >>remember right. We pulled them low, >>one at a time and the channel >>changed accordingly. It worked fine. >>We just need to hear some kind of a >>confirmation over the repeater to >>confirm the channel change. >> >>Rod > > What kind of repeater controller are you using? > Any decent controller will have a way to indicate a completed function. > > On our system we have macros that: > a) turn the 2m remote base off > > b) select channel N where N is 1 through 8. Each channel > has a preselected CTCSS tone. > > c) select CTCSS encode tone NN where NN is 01-32 (tone 00 is carrier > squelch) > (this overrides the preselected tone) > > d) enable the 2m transmitter for the current channel. > > Each of the above functions is several commands in the controller. > Each is triggered by sending a DTMF string that triggers a macro. > One of the commands in each macro sends a beep or speech > message appropriate to the command (for example, selecting > tone 00 says "none", tone 13 says "one hundred". Note that > these responses all come from the controller, not from the > remote base radio. > > There are several commands that turns the 2m transmitter off, > including changing the channel, changing the encode tone, > changing any of the point-to-point link configurations, or > any of the patch functions. These are all controlled by macros. > > If you let us know what controller you are using we can give > you some pointers. > > Mike WA6ILQ > >
