To convert it back to a M1225 conventional radio, the microprocessor would have to be changed. This radio uses a masked processor and is not flashable. That's why it only does 2 conventional channels. The M1225LS has limited memory available. Likewise, if the radio you have has been programmed by newer software than you posess, you will not be able to read/write it unless you get the same or newer version than what is in the radio. That is to say, once you program a radio with a newer version of software, there is no going back. audio in.Īn RSS note, the RSS for these radios is not backwards compatible. the input is switched by the PTT line from the accessory connector. Motorola did swap radios so you could use pin 5 BUT. Some very early M1225's would not let you put audio into pin 5. If you delete this option, you should be able to alpha-tag all the channels. However, we have been told that one of the greatest memory hogs is the Talk-Around button option. If you select this option, as long as you don't use the alphanumeric portion on every channel (or it will run out of memory) you can get 24 channels in. There is a selection in the RSS to make the radio 24 channels. The accessory connector pinout is the same as that of the SM50/120 radios. NOTE: You must use the keys along the top of the keyboard for this to work, not the keys on the numeric keypad. Using RSS versions 1 and 2, and 3.1 Out of Band programming can be done by holding down the shift key for everything except the decimal place during frequency entry.

Motorola programming cable m1225