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Author Topic: 6945 USB 0347 UTC 14 Aug 14 Link-11?  (Read 2123 times)

Offline IQ_imbalance

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6945 USB 0347 UTC 14 Aug 14 Link-11?
« on: August 14, 2014, 0349 UTC »
Ok maybe not link 11.  Sstv instead?  good signal into central md
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Offline glimmer twin

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Re: 6945 USB 0347 UTC 14 Aug 14 Link-11?
« Reply #1 on: August 14, 2014, 0448 UTC »
Sounds like an FSK (RTTY) signal to me. It might be a STANAG xxxx (1241  maybe...I can't recall that designation)  station. I can't tell without firing up my SDR and seeing it in the waterfall. I left my SDR IQ at the little womans QTH.
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Offline IQ_imbalance

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Re: 6945 USB 0347 UTC 14 Aug 14 Link-11?
« Reply #2 on: August 14, 2014, 1240 UTC »
My wife was asleep...that precluded me running audio for comparison....
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Central MD

Offline ChrisSmolinski

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Re: 6945 USB 0347 UTC 14 Aug 14 Link-11?
« Reply #3 on: August 14, 2014, 1526 UTC »
I've noticed RTTY (FSK) here off and on in the past, and it was present all last night on the SDR recording. It's about the same strength as the Link-11 that is found here, so perhaps the transmitter QTH is the same.

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Offline Token

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Re: 6945 USB 0347 UTC 14 Aug 14 Link-11?
« Reply #4 on: August 15, 2014, 1412 UTC »
STANAG 4481 FSK, 850 Hz shift, with KG-84 frames and encrypted.  While many people call this RTTY, and it looks and sounds just like old RTTY, it is not really RTTY anymore, but a true data transfer protocol that never hits or originates from a teletype.

Both the bearing and the signal level are consistent to be the same source as the Link 11 seen on freq.  While not the only users the US Navy or USCG are the most likely source.

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Offline IQ_imbalance

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Re: 6945 USB 0347 UTC 14 Aug 14 Link-11?
« Reply #5 on: August 16, 2014, 0257 UTC »
Well now I want a portable loop .....
LOG/NE-SW unterminated BOG
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