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LF: RE: NAVTEX interference

To: <[email protected]>
Subject: LF: RE: NAVTEX interference
From: "Gary - G4WGT" <[email protected]>
Date: Tue, 19 Aug 2008 12:53:32 +0100
In-reply-to: <[email protected]>
References: <[email protected]> <[email protected]> <[email protected]>
Reply-to: [email protected]
Sender: [email protected]
Thread-index: AckB50ZHvTdl2qlpRWSDAFKicBS1PAAAbWa7AAHY4ZA=
Hi LF,

I have noticed a strange occurrence when looking back at my extended
frequency range of captures.

In most of the interfering periods the strongest signal has not, I repeat -
HAS NOT been at 518 KHz. Yes a 518 KHz signal has been present quite weak
but amongst the splatter the spurious signals on 514.5 & 513 KHz have been
very strong along with a very strong un-modulated signal on 516.525 KHz.

There have also been five similar spurious but weaker signals radiating into
the 500 KHz band but originating from a lower frequency than my SDR Rx can
is monitor. ie, lower than 489 KHz.

I am keeping all the captures & will continue to monitor & capture until the
problem is resolved.

Regards,

Gary - G4WGT.
 

-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Chris Trayner
Sent: 19 August 2008 11:48
To: [email protected]
Subject: LF: RE: Re: NAVTEX interference


> Perhaps  you can contact with the MCA ( Maritime and Coastguard Agency); 

And/or Ofcom (the UK licencing agency)? 
Might be worth attaching one of the spectra that have been circulated on
this list, plus some of the other supporting details.


73,
Chris G4OKW

-----------------------------
Dr Chris Trayner
School of Electronic & Electrical Engineering,
The University of Leeds,
Leeds LS2 9JT, United Kingdom
Tel: +44 113 34 32053
Fax: +44 113 34 32032





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