I haven't tested it on-air but it looks to be doing all the right things on the test-bench.
Thanks to all concerned.
Holding down SELECT puts you in menu mode. The POWER LED will now flash to indicate this. To navigate, press the SELECT and BACK buttons momentarily to move up and down in the menu. Again, after a pause the item will be read out. Holding SELECT or BACK either chooses the option, or backs out.
Pressing PTT while in a menu exits the entire menu tree without saving changes to flash storage.
A power cycle is required for the new setting to take affect.
The menu structure looks like this:
-> Root menu:
|---> "MODE": Boot-up Operating mode
| |---> "ANA": Analogue mode
| |---> "1600": FreeDV 1600
| '---> "700D": FreeDV 700D
|
|---> "TOT": Time-out timer
| |---> "TIME": Total time-out period (0 == disabled)
| | 0-10 minutes in 5 second steps
| '---> "WARN": Warning beep period (0 == disabled)
| 0-${TIME} seconds in 5 second steps
|
'---> "UI": User interface options
|---> "FREQ": Morse frequency
| 50-2000 Hz in 50Hz steps
|---> "WPM": Morse send speed (PARIS standard)
| 5-60 WPM in 5 WPM steps
'---> "VOL": Menu volume
1-15 units.
See here for more details