1. Product Overview
The Kymate USB Programming Cable (Model RPC-MM-U) is designed to facilitate communication between a computer and compatible Motorola mobile radios for programming purposes. This cable provides a reliable USB interface for data transfer, enabling users to configure radio settings, frequencies, and other parameters using appropriate programming software (not included).
Key Features:
- USB interface for broad compatibility.
- High-quality PU cable construction for durability.
- Cable length: 1 meter (3.3 feet).
- Compatible with various Motorola mobile radio models.
Compatible Motorola Radio Models:
- CM200, CM300, CM340
- PM400
- GM300, GM338, GM340, GM360
- MCX600, MCX760, MCX780
- PRO3100, PRO5100, PRO7100
- CDM750, CDM1250, CDM1550, CDM1550.LS, CDM1550.LS+
- RKN4081
2. Setup Instructions
2.1 Driver Installation
Before connecting the programming cable to your computer, it is essential to install the necessary USB drivers. The cable typically includes a CD with the required drivers. If a CD is not provided or your computer lacks a CD drive, drivers can often be downloaded from the manufacturer's support website or a reliable driver repository.
Supported Operating Systems:
- Windows 2000, Windows XP, Windows Vista
- Windows 7, Windows 8, Windows 10
- Windows Server 2003, Windows Server 2008
- Mac OS (specific versions may vary, refer to driver documentation)
- Insert Driver CD: If provided, insert the driver CD into your computer's CD/DVD drive.
- Run Installer: Locate and run the driver installation executable (e.g., setup.exe). Follow the on-screen prompts to complete the installation.
- Download Drivers (if no CD): If a CD is not available, download the appropriate drivers for your operating system from the Kymate support website or a trusted source.
- Restart Computer: After installation, it is recommended to restart your computer to ensure all drivers are properly loaded.
- Verify Installation: After restarting, connect the USB end of the cable to your computer. Open Device Manager (on Windows, search for "Device Manager") and look for a new entry under "Ports (COM & LPT)" or "Universal Serial Bus controllers." The cable should be recognized, typically as a "USB Serial Port" with an assigned COM port number. Note this COM port number as it will be needed for your radio programming software.
2.2 Connecting the Cable
- Connect to Computer: Plug the USB Type-A connector of the programming cable into an available USB port on your computer.
- Connect to Radio: Plug the RJ45 (Ethernet-style) connector of the programming cable into the programming port of your Motorola mobile radio. Ensure a secure connection.

Image 1: The Kymate USB Programming Cable, showing both the USB Type-A connector and the RJ45 connector. The cable is coiled, and a small tag is attached near the USB end.

Image 2: A close-up view of the RJ45 connector end of the programming cable, highlighting its transparent plastic housing and internal wiring.

Image 3: A close-up view of the USB Type-A connector end of the programming cable, showing the USB symbol molded into the plastic housing.
3. Operating Instructions
This programming cable acts as an interface between your computer and the Motorola mobile radio. It does not include programming software. You will need to obtain the appropriate radio programming software (e.g., Motorola CPS - Customer Programming Software) for your specific radio model separately.
- Install Radio Programming Software: Install the correct programming software for your Motorola radio on your computer.
- Power On Radio: Ensure your Motorola mobile radio is powered on.
- Launch Software: Open the radio programming software on your computer.
- Select COM Port: Within the programming software, navigate to the communication settings or port selection. Choose the COM port number that was assigned to the Kymate USB Programming Cable during driver installation (as identified in Device Manager).
- Read/Write Radio: Follow the instructions within your radio programming software to read data from the radio, modify settings, and write new configurations back to the radio.
Important: Always back up your radio's current configuration before making any changes. Incorrect programming can lead to radio malfunction. Refer to your radio's specific programming software manual for detailed instructions on its usage.
4. Maintenance
Proper care and maintenance will extend the lifespan of your Kymate USB Programming Cable.
- Storage: Store the cable in a cool, dry place away from direct sunlight and extreme temperatures.
- Handling: Avoid sharp bends, kinks, or excessive pulling on the cable, especially near the connectors.
- Cleaning: If necessary, gently wipe the cable with a soft, dry cloth. Do not use harsh chemicals or abrasive cleaners.
- Connector Protection: When not in use, consider using dust caps for the connectors to prevent dust and debris accumulation.
5. Troubleshooting
If you encounter issues while using the Kymate USB Programming Cable, consider the following troubleshooting steps:
| Problem | Possible Cause / Solution |
|---|---|
| Cable not recognized by computer. |
|
| Programming software cannot connect to radio. |
|
| "Error writing to radio" or "Error reading from radio." |
|
6. Specifications
| Feature | Detail |
|---|---|
| Brand | Kymate |
| Model Number | RPC-MM-U |
| Connector Type (Computer) | USB Type A |
| Connector Type (Radio) | RJ45 (8-pin) |
| Cable Type | USB Programming Cable |
| Cable Length | 1 meter (3.3 feet) |
| Compatible Devices | Motorola Mobile Radios (CM, PM, GM, MCX, PRO, CDM series) |
| Operating System Support | Windows 2000/XP/Vista/7/8/10, Windows Server 2003/2008, Mac OS |
| Special Feature | Tangle-Free Design |
| Package Dimensions | 6.97 x 5.63 x 0.59 inches |
| Item Weight | 1.76 ounces |
7. Warranty and Support
Specific warranty information for the Kymate USB Programming Cable is not provided in this manual. For details regarding warranty coverage, returns, or technical support, please refer to the product packaging, the retailer's policy where the item was purchased, or contact Kymate customer service directly through their official website or contact channels.
When seeking support, please have your product model number (RPC-MM-U) and purchase details readily available.





