Messages

1

Technical Support / Re: What should I see/hear tuned to 869.525Mhz with a Software Defined Radio?

« on: September 04, 2022, 01:54:52 pm »

To conclude this thread for subsequent readers:

I sent the bridge PCB to Jeremy for testing and he confirmed that transmit was not functioning.  I purchased a new bridge from PA and installed it.  Now when I use the SDR to listen on 869.5 MHz I hear bursts of activity approximately once per second..  Curiously they don't show up on the SDR software waterfall; I guess I haven't selected the precise enough settings. 

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Technical Support / Re: What should I see/hear tuned to 869.525Mhz with a Software Defined Radio?

« on: August 14, 2022, 12:22:19 pm »

I'd like to take you up on that.  I took the bridge off and examined it for physical damage; it looks perfect.  Reinstalled it and had another go, transmit speed set to 0kts, and GPS locked on: nothing in the waterfall.  It would be good to have its u/s status confirmed before I source another bridge.
Presumably I just post the bridge?

3

Technical Support / Re: What should I see/hear tuned to 869.525Mhz with a Software Defined Radio?

« on: August 11, 2022, 08:30:20 pm »

Thanks for that info.  I guess I need to investigate further.  Unfortunately not near Cambridge; down on the South Coast.

P.S., We have one of your excellent chargers fitted to our aircraft. 

Richard

4

Technical Support / What should I see/hear tuned to 869.525Mhz with a Software Defined Radio?

« on: August 11, 2022, 03:34:02 pm »

The background to this query:  I'm updating the Rosetta in a shared aircraft.  For a while it has not been showing up on Vector plots, although the SkyEcho we also carry has.  After a lot of mucking about, I finally looked at the set hex ID; someone had set it to a random number, so It wouldn't be recorded against this aircraft.  I did look at Vector for that number, but nothing recorded.  So, even if the hex ID was wrong, it still looks like no P3i is being transmitted.  (but then I'm not sure how long ago the PA was used.

As I had a leftover DVB-T USB Receiver Dongle from upgrading from the Classic to Rosetta, I set it up as a SDR and listened on 869.525Mhz while the PA Rosetta was operating near by.  I appeared to get nothing, though there is certainly a lot of transmissions on nearby frequencies.  Nothing changes PA on or off.

Is that a legit test of the P3i broadcast?