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Date: Mon, 02 Oct 2006 19:00:42 +0200
From: "John RABSON" <john.rabson@wanadoo.fr>
To: rsgb_lf_group@blacksheep.org
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Subject: Re: [Norton AntiSpam] LF: Strange signal 500khz
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Is it perhaps some kind of bang-bang servo?  It seems to have more than=
 eight but fewer than 16 states, which suggests a 4-bit control word=
 perhaps from a microcontroller.

John F5VLF

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On 30/09/2006 at 20:00 Gary - G4WGT wrote:

>Hi All,
>
>I now often check around 500KHz for what is going on, I usually see on
>SpecLab (sometimes hear) a continuous carrier very  near to 500KHz. On
>looking/listening tonight the signal frequency is varying in small steps
>(see attachment). I can't decide if it is somthing local to me or a=
 genuine
>MF signal. Zero on the capture is 500KHz. Any comments please.
>
>Gary - G4WGT.