> 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
