Go to > Communications and select the matching COM port.
You need a boot-control programming cable with an RJ-45 connector that plugs directly into the microphone jack on the front of the GM338.
The GM338 requires specific legacy software, usually the (often version AZ/PMVN4082 or similar, depending on your region). This software allows you to interface with the radio via a specialized programming cable connected to a PC. Core Functions of the CPS:
utilizes a 20-pin accessory connector on the rear, though some interfaces use a 16-pin variant Key Configurable Parameters Motorola GM338 Programming Manual details the following critical setups: Channels and Frequencies
The Motorola GM338 is a legendary, high-performance mobile two-way radio widely used in commercial, emergency, and industrial communication networks. To configure frequencies, signaling, and channel spacing on this robust hardware, you require the Customer Programming Software (CPS). Go to > Communications and select the matching COM port
If you want to proceed with setting up your radio, please let me know: What is your computer running? Do you already have a USB or Serial programming cable ?
Navigate to > Personality to edit frequencies, PL/DPL tones, and bandwidth (12.5 kHz or 25 kHz).
Because official legacy Motorola CPS can struggle on modern Windows 11 machines, do not rely on a sketchy repack to solve compatibility. Instead:
Immediately click File -> Save As and save this original file as a backup (e.g., GM338_Original_Backup.cpg ). Never alter this file; it is your recovery point if something goes wrong. Step 4: Edit Frequencies and Signaling This software allows you to interface with the
: Older versions often perform best on legacy Windows systems, though some users report success on Windows 7 through Windows 11 with administrative rights. Programming Setup
Never modify a radio without saving the original codeplug file. If the file corrupts, the backup is your only recovery tool.
If you want to ensure your programming environment is set up correctly, let me know:
Inside the ZIP file was a single executable: GM338_Universal_Repack_v2.exe . If you want to proceed with setting up
Searching for "repacks" or "exclusive downloads" for radio software often uncovers files that are modified or distributed outside of official channels.
They eliminate the need to hunt down individual patches, updates, and language packs. The Hidden Risks of "Exclusive" Repack Downloads
Support Locating Mototrbo Firmware Packages in the Customer Hub
