Motorola GM300 programming

The HVN8177 programming software (RSS) programs the M10, M120, M130, and GM300 mobiles, as well as the GR300, GR400, and GR500 desktop repeaters. The latest release is HVN8177F version R05.00.00 dated December 1995. The RSS is shipped on 3.5-inch diskettes and is a DOS-only program.

The microphone connector is exactly the same as on a MaxTrac, and it's also well-documented in the MaxTrac section. The programming cable and RIB setup is the same as what you'd use for a MaxTrac or GTX.


You can hex-edit the MDF file in the RSS to allow an 8-channel radio to take 16 channels. Additional information is available at Colin Lowe's web site.

The GM300 with the expanded logic board supports the same common signaling modes as a MaxTrac (PL, DPL, MDC, etc.).

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