CHIRP is a free, open source tool for programming frequencies, tones and offsets into many of today’s VHF-UHF radios using a PC, Linux or Apple computer and programming cord. Follow this link to download the version you prefer for your operating system… https://chirp.danplanet.com/projects/chirp/wiki/Download To program a radio using CHIRP, a special formatted file listing of frequencies, tones, with associated offsets, must be IMPORTED into the CHIRP application, which will then use the file to program your radio. Creating the programming file (in CSV format) can be time consuming and error prone. It is most handy to start with a file with many of the local area frequencies of interest, then add or delete to suit your own needs.
BFL. Thanks