UAT/978 In

[PaulSS]

Ahh, okay, thanks Ian. It was worth asking but I'll shelve that idea then 

[jollyrog]

I'm refreshing our installation in the Cub and am planning something quite permanent and neat.

How likely is it that the two-receiver/two aerial option for 978/1090 will be adopted? I have no problem with this and have an opportunity now to fabricate my installation with that in mind. We're based at Redhill, where weather is available.

Thanks.

[exfirepro]

Rog,

Not necessarily 2x antennas! You can receive both 1090MHz and 978Mhz quite happily on a single antenna using a simple Y splitter at the receivers. Both are receive only so antenna length is not ‘critical’.

As the 978Mhz signals are likely to be ‘weaker’ than the 1090MHz ones, however, I would suggest using an antenna tuned for 978MHz in preference to one tuned for 1090MHz.

Regards

Peter

[jollyrog]

That's very helpful, thank you.

Still the question though... is this the route that PAW is going down, rather than timeshare on one receiver?

Thanks.

[exfirepro]

Rog,

As this function is still in development it's very difficult to say definitively which way it will end up, however it seems likely that a 'dual SDR' option will be simpler to configure and less likely to negatively affect 1090MHz traffic reception - which of course must be our priority.

As I said above, a dual SDR installation can be fitted with either a single (split) or dual (separate) antennas. FWIW, I have done limited testing (no 978MHz transmitters up here in Scotland) using a single 978MHz antenna and have seen no significant effect on 1090 Traffic reception. As I already have 5 antennas + 3 x GPS on/in my flexwing, I would probably go for a single antenna setup to keep antennas to the 'minimum'.

Regards

Peter

[jollyrog]

Thank you again Peter.