Right-click "This PC" or "My Computer" and select .

: Set CTCSS/DCS tones for private group communication.

You need the HYT HT320 CPS . It is a Windows-based application. Note that newer versions are generally backward compatible with older radio firmware.

Since direct download links change frequently and I cannot host files, here are the legitimate sources and search strategies:

Here’s a helpful, straightforward write-up for anyone looking for the .