, which is compatible with the BD615 and other BD5/PD4 series radios.

This is usually a driver issue or a loose cable. Check your Device Manager and ensure the radio is turned on.

After editing your frequencies and settings:

If you encounter connection issues, try turning the radio before connecting the cable, then powering it on once the USB is secured to your PC. This often forces the radio into "programming mode" for more stable data transfer.