[Spooks] Spooks Digest, Vol 78, Issue 26

[Beaumont, Paul]

Incidentally, XPA is very resilient over noise.

73
Paul
________________________________________
From: spooks-bounces at mailman.qth.net [spooks-bounces at mailman.qth.net] On Behalf Of Beaumont, Paul [p.beaumont at imperial.ac.uk]
Sent: 27 July 2010 18:53
To: Shortwave Spy Numbers Stations
Subject: Re: [Spooks] Spooks Digest, Vol 78, Issue 26

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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