Actually you can switch modulation to "positive PM/FM" to work with other brands such as Hitec and Futaba. See page 24 in the manual.
PCM only works with Airtronics as you say.
Don
Airtronics still will not drive a Futaba receiver. The only thing they
> changed was the servo connectors and the receiver layout so you can use
> Hitec/JR servo plugs in it. The 8000 seems to be a nice system, but it wont
> let you use your present Futaba stuff, except the servos and those have to
> have the fin on the plug cut off.
>
> I have found that New Airtronics, JR and Expert electronics will work
> together. As far as I know (I don't own any) Futaba and Hitec work
> together. That is in FM modes, anything PCM will only work with its own > brand.
>
>
> --
> Eric Kler
> Fubar Hill -formatting link
>
> ____
>
>
>
> > I am thinking about getting a new radio, and the Airtronics RD8000 is
> > in the running. I know Airtronics has swithched to "standard"
> > connecters, but is it a high shift or low shift system, and is that
> > compatible with the older (7UAF era) Futaba stuff? I see the TX is
> > selectable from high to low shift PPM and PCM, but I don't want to
> > have to remember which plane has the old Futaba receivers and remember
> > to change the TX modulation. Perhaps the TX modulation is part of the
> > model memory??(unlikey) Yes, I have a lot of legacy Futaba stuff I
> > don't want to let sit around.
> > Any general comments on this radio, I sure like that I can get 5 bb
> > servos and a great set of features for $300, compared to the 9CAF. > > Daze
>
>