Check Device Manager for the correct port number and update the software settings. Faulty or counterfeit USB cable driver.
: Assigning specific RX/TX frequencies to each channel. motorola smp 468 programming software
Programming involves reading the current configuration from the radio, editing the frequencies, and writing the new data back to the device. Phase 1: Connecting and Reading the Radio Turn off the Motorola SMP468 radio. Check Device Manager for the correct port number
If you'd like to proceed with programming your device, let me know: What is your PC running? editing the frequencies