Just to set the RX and TX frequencies and the CTSCC/DCS ( same as QT/DQT) the same .
Please operate the followings step by step:
1, you need a programming cable for the two radios.
2, you need the software of the two radio. ( we will send the software in a separately e-mail).
You can find the programming cable here ( the two radio can use the same one) :
About how to install the software,here is the blog:https://www.twowayradiocommunity.com/how-to-programme-h777
Now we start to set the frequency and QT/DQT (also name as CTCSS/DCS) of H777.
1.For example: channel 1: Rx Freq:462.56250 Tx Freq:462.56250 QT/DQT: 67 QT/DQT Enc: 67
channel 2: Rx Freq: 462.58750 Tx Freq: 462.58750 QT/DQT: 69.3 QT/DQT Enc: 69.3
2.Then same as H777, you can install the RT21 software: QT/DQT (also name as CTCSS/DCS)