Thanks for interesting information below. I can see the wideband data noise on the SpectrumLab often. It is the reason, why I have to use a new favourite freq for transmitting, 502,300kHz (insteed 501,888kHz). If the conditions are good, then the noise is very good visible. But it is not audible here. I can see it at night only.
******************************
> Date: Mon, 1 Nov 2010 23:37:08 +0000
> From:
[email protected]> To:
[email protected]> Subject: LF: The Wideband Noise
>
> Hello,
>
> I've had some correspondence with John G3WKL and Colin G3PSM about the
> new "commercial" wideband data noise that occupies 498-502kHz
>
> It seems to be a test of an impending data system for marine use.
>
> Colin would like some information about where, and when, it can be
> heard or otherwise detected. It appears to be being driven by the
> French.
>
> Forthe record I can hear it here in Shetland. It faded up tonight at
> approx 1615 UTC and is audible and visible on a waterfall display.
>
> I haven't been in a position to DF it, but in the first instance Colin
> would like to gather some information about where it is being received.
>
> I can collate the information for him if anyone who is affected by, or
> can simply detect, this noise/data signal could give details either
> direct, or via the LF group. I know a lot of discussion has been had
> already, but a quick note now could be useful, as there is a meeting
> soon to discuss this, and other aspects of WRC2012.
>
> Cheers,
>
> John
> GM4SLV
>
