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Is there a resource on the internet where you can look at different
screenshots and see what the source is for some of the signals that are translated by the waterfall? I see so many different geometric forms based on the nature of the Rf and they are a mystery to me. CW is pretty easy to detect, same with RTTY. Some of the other digital signals have their own appearance you see often. There are some signals I have heard before but now to see them portrayed on a screen as in a waterfall, they are surprising to me and I'd like to know what they are. For instance; I was on 10.1 MHz and there's that constant commercial RTTY station around 10.101 but next to it around 10.112 is another much larger signal and it takes a lot of bandwidth. At first I thought it was some new digital mode I haven't yet seen but it is continuous so it must be commercial. It looks to be a series of curled sections spiralling with each other. I've heard this signal before but just now with the P3 with its SVGA larger output, am able to see it. http://doctorgary.net/p3screen.jpg I'd like to be able to identify what kinds of signals make the QRM that we hear but can now see with the waterfall display. 73, Gary KA1J --- This email is free from viruses and malware because avast! Antivirus protection is active. http://www.avast.com ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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Hi Gary,
The signal you are referring to is a STANAG 4285 military transmission from Turkey. The curly things you see in the spectrum is in fact selective fading in the sent spectrum, which is roughly 10 kHz wide. <quote> 10.1102 MHz-USB-Izmir, Turkey Turkish Navy - STANAG 4285 <unquote> from: http://qrg.globaltuners.com/?q=STANAG%204285&o=qth&m=0&m=1 The RTTY on 10.101 is DDK9, A German Meteo service sending SYNOP to (probably just a handful now, I suppose...) ships. Germany seems to have enough money to maintain a 10 kW transmitter active 24/24 for ancient services. 73, Peter Op 2014-02-19 21:22 schreef Gary Smith: > but next to it around 10.112 is another > much larger signal and it takes a lot of bandwidth. ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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