Many interfaces need a COS/COR input that is (active high) at 2 to 5vdc. If you want to use the COS/COR output from your GM300 the COS/COR on pin 8 is (active low). GM300 programming connection When looking at the radio here are the numbersĪs you can see to make the programming interface for your GM300 is very basic.Ĭonnection your Motorola GM300 for Echolink or IRLP etc. You can make your own or just search on Ebay for 'GM300 programming' or make programming interface from below 'at your own risk' You will also need a simple interface to connect the radio to your PC. If you want a copy of Motorola Doctor software just join the following group
This program runs fine under Windows XP and will do all the functions that the genuine Motorola radio service software does.
It has been pointed out to me that this software only works with the GM300 so I have adjusted the page.Īfter searching for the genuine Motorola program I came across Motorola Radius GM300 Radio Doctor. Programming / Service software for the Motorola Radius GM300
