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Incidentally, XPA is very resilient over noise. 73 Paul ________________________________________ From: spooks-boun...@mailman.qth.net [spooks-boun...@mailman.qth.net] On Behalf Of Beaumont, Paul [p.beaum...@imperial.ac.uk] Sent: 27 July 2010 18:53 To: Shortwave Spy Numbers Stations Subject: Re: [Spooks] Spooks Digest, Vol 78, Issue 26 Visit http://mailman.qth.net/mailman/listinfo/spooks to unsubscribe from this list The affidavit describes the Radiogram as: 'Radiograms are coded bursts of data sent by a radio transmitter that can be picked up by a radio receiver....' It carries on, 'As transmitted, radiograms generally sound like the transmission of Morse code.' That sounds to me like XPA polytones - automatic decodes. So the clicking may well have been laptop keys being operated - unless they hear the same click, or tick, I sometimes hear when I receive XPA. 73 Paul ______________________________________________________________ Spooks mailing list Home: http://mailman.qth.net/mailman/listinfo/spooks Help: http://mailman.qth.net/mmfaq.htm Post: mailto:Spooks@mailman.qth.net This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
