Open your computer's and expand Ports (COM & LPT) to find the exact COM port number assigned to your cable (e.g., COM3). Open the Motorola CPS software, click on File , select Comm Setting , and set the port to match your Device Manager. Step 3: Read the Radio Codeplug
Pin 1 (Ground), Pin 2 (BUS+ / programming voltage – 5V via resistor), Pin 5 (TX Data from radio), Pin 7 (RX Data to radio). Incorrect wiring can destroy the radio’s controller. motorola gm3688 programming software download
Immediately go to > Save As and save this original file as a backup (e.g., GM3688_Original_Backup.txt or .rad ). Step 5: Edit Frequencies and Settings Open your computer's and expand Ports (COM &
Connect the RJ45 end of your programming cable into the "MIC" or accessory port on the front of your GM3688. Connect the other end (USB or Serial) to your computer. When the radio is powered on, you will be ready to program. Incorrect wiring can destroy the radio’s controller
If the computer does not recognize the cable, install the necessary USB-to-Serial drivers.