Enable the "Whisper" function, Lone Worker alerts, and programmable function keys.
You may be using software meant for a different HYT model or a different frequency band version of the TC-780. Hyt Tc-780 Programming Software Download
This software is the bridge between your computer and your handheld radio. It allows you to read the radio's current configuration and write new settings directly to the device. Key capabilities include: Enable the "Whisper" function, Lone Worker alerts, and