Did some testing on both ideas...
Recently i am able to be QRV on NB and WB in same disc and amplifier..
Doing NB USB is a good option but indeed far from perfect. zerobeat signals and squelch problems makes it less preferable for the DATV station.
NFM or even WFM will fit easy between WB channels and is better in respect of quality and easy to use.. You can better work with squelch options and even CTCSS.. Downside, youll need over 10Watt FM to get a desent S9 R5 signal...
In stead of the 4 watt needed for a similar USB signal...
You can even put the NFM channel inside the DATV signal but youll get lots of white noise in the reception and the D quality of the DATV signal goes down rapidly...
So that not wat one should want...
Normal 2 way QSO on DATV is still not so easy as there is a big delay in coding and decoding causing up to 15 sec waitings in microfoon hand overs....
So what would be the reason not to use NFM in the WB section of this nice project other than it needs to be allowed??
Benno...