The TK-3107 is a UHF (400–470 MHz or 450–490 MHz) or VHF (136–174 MHz) transceiver. To change channels, squelch levels, signalling (QT/DQT), or power output, you cannot use the buttons on the radio. You must use the software (or the older DOS-based KPG-87) running on a Windows PC.
Why do this? Reading the radio downloads its current configuration (including tuning values) to your PC. If you kenwood tk-3107 programming software free download
CHIRP (the open-source radio programming tool) supports many Kenwood models (TK-270/370, TK-280/380), but it does not support the TK-3107. You must use KPG-87D. The TK-3107 is a UHF (400–470 MHz or