Step 2 Hold down the PTT on the palm microphone and power on the repeater, so as to let the
repeater enter the download mode.
Step 3 When the repeater enters the download mode successfully, the LED will flash red for several
seconds and then glow red solidly. Otherwise, it indicates the access fails. In this case, you
need to try to enter again.
Step 4 Disconnect the palm microphone from the repeater, and use PC37 to connect the repeater to
PC.
3.1.2 RD62X
Use PC75 to connect the repeater and PC, and toggle the switch on the programming cable to the DL
end, then power on the repeater to enter the download mode. The connection diagram for PC75 is
similar to that for PC47.
3.2 Starting Upgrade
After the repeater entering the download mode, update the software as follows:
Step 1 Enter the main interface of the software by clicking its shortcut.