On 12 September 2014 11:22, Malcolm Robb <[email protected]> wrote:
> I've no idea why some aircraft are so far off, but the fact is they are. It > was brought to my attention when Jet-2 B-757 G-LSAC passed in 'stealth mode' > over me regularly. When I re-tuned to 1090.75Mhz, it was sucessfully decoded. > This implies it is perhaps 500Khz high - so well within spec, but outside the > bandwidth receivable by the dongle when tuned to 1090.00. Perhaps G-LSAC uses > an L-C oscillator rather then a crystal in it's wirelesses :-) Since the messages are being retransmitted regularly, maybe just frequency hopping +/- a few hundred kHz around 1090 would help? Oliver
