LF: Re: Re: Strange signal

["Gary - G4WGT" <g4wgt@tiscali.co.uk>]

OK Marco,

 

You could be correct....

 

Apart from the actual signal I was commenting about there are lots of interfering lines & pulsing at night time which probably do come from a neighbours TV or similar digital equipment. You can see them on the upper part of the full screen shot  :-((

 

73,

 

Gary - G4WGT

 

----- Original Message -----

From: Marco Cadeddu

To: rsgb_lf_group@blacksheep.org

Sent: Tuesday, January 08, 2013 7:47 PM

Subject: LF: Re: Strange signal

Gary...

you need to improve relationships with your neigborough! ;-) hihi

 

73, Marco IK1HSS

----- Original Message -----

From: Gary - G4WGT

To: LF Group

Cc: rsgb_lf_group@yahoogroups.co.uk

Sent: Tuesday, January 08, 2013 7:26 PM

Subject: LF: Strange signal

Hi All,

 

I am seeing a strange signal centered on 474.750 kHz. It is periodically visible & audible on my grabber system & my JRC NRD-345. there appears to be no data, just continuous tones. Both systems using separate antennas.

 

I have placed a capture on Dropbox of the grabber image & you can see the end of a previous period & the start of a new one. The signal pattern starts with a bulge at the beginning but just shuts off at the end.

 

https://dl.dropbox.com/u/15990181/472-479-1301081910.jpg

 

I have also placed a capture from the JRC Rx with SpecLab running at QRS01.

 

https://dl.dropbox.com/u/15990181/capt1301081909.jpg

 

Any ideas or knowledge of this signal ?

 

73,

 

Gary - G4WGT.