[Spooks] First catch

[jmm]

Arnaud Rouanet wrote:

> Hi,
> 

> 
> I have a couple of questions which you might find quite naive,
> but...



Don't worry. We all were newbies once upon a time... ;)


> 
> o At regular intervals, a high pitched noise covers the
> broadcast.  Is it jamming, or simply a sort of atmospheric
> noise?


None of the above.

These signals have aleady been discussed in the 'Enigma 2000' 
newsletters oddities section (see 
http://www.cvni.net/radio/e2k/e2k02odd.html and subsequent issues)

The purpose remains obscure.

> 
> o A few minutes before the end of the message, another broadcast
> starts in background and covers the first one.  The woman voice
> is clearly the same, but the message seems different.  Is it a
> co-channel interference?
> 

This might be a manual mistake from the operator. E10 behaviour is 
extensively described in the 'Spooks Newsletter' (see 
http://www.cvni.net/radio/nsnl/nsnl1intro.html, click on E10 link, and 
follow links). Some audio samples of message strings (E10a) 
transmissions can be found at http://www.cvni.net/mp3.