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LF: Re: what's this ?

from [Alan Melia] [Permanent Link][Original]
To: <[email protected]>
Subject: LF: Re: what's this ?
From: "Alan Melia" <[email protected]>
Date: Sat, 23 Dec 2006 00:25:37 -0000
Delivered-to: [email protected]
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Hi Stephan, well it looks as though most of the "elements" occur coincident
with clicks or bangs (static?), the vertical bars. It could be a Loran line
just starting to come up and "illuminated" by the noise. Sometimes the
addition of noise or dither will push a signal over the threshold and make
it detectable.

Accurate measuremnt of the element and space lengths and starting positions
will normally give you a good clue as to whether it is a signal or not. I
usually make myself a little paper template for different speeds.

Best Wishes de Alan G3NYK

----- Original Message -----
From: Stephan Hans <[email protected]>
To: <[email protected]>
Sent: 22 December 2006 21:04
Subject: LF: what's this ?


> Hi @ all,
>
> what's this @ 136320.0 Hz from 16:20 to 17:00 UTC:
> http://dl3fch.st-hans.de/capt236.jpg
>
> Just random noise artefacts, what do you think ?
>
> vy 73 de Stephan / DL3FCH
>
> ps. I'm actually messing around with spectrumlab, but I can't figure out,
> how to activate some kind of agc (to get automatic contrast/brightness).
> Maybe somebody can give me a hint... ?
>
>
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