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Re: ULF: Key down signal on the 101 km band, still on the air

To: [email protected]
Subject: Re: ULF: Key down signal on the 101 km band, still on the air
From: DK7FC <[email protected]>
Date: Sun, 17 Jul 2016 19:36:15 +0200
In-reply-to: <[email protected]>
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Hi all,

The signal is on the air since > 3 weeks now :-)
Paul, any results in a bandwidth < 1 uHz ?

Renato Romero has started a spectrogram of 1.26 uHz FFT bin width and a 3000 min / pixel scroll rate :-)

Between 16...17:30 UTC today the transmitter stopped for some reason. I have restarted the PC. Now the signal is on the air again. The phase of the signal is not just constant, it is even the same as before the PC restart :-) So the loss of just 90 minutes doesn't really hurt...

73, Stefan

Am 06.07.2016 08:48, schrieb Paul Nicholson:

Stefan wrote:

> The carrier is on the air since 9 days now, without
> an interruption.

Nothing is visible, not even the beginning of a peak at 2970,
down to bandwidths of 1.36 uHz.

I continue to experiment with the settings of filters and
sferic blanker. The noise floor is too high, averaging
0.023 fT in 1.36 uHz even after blanking the noisy periods.
It should be a lot lower than that.  If I can fix that problem,
we may see the signal appear.

--
Paul Nicholson
--


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