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Re: LF: Re: Re: 8270Hz - on air

To: [email protected]
Subject: Re: LF: Re: Re: 8270Hz - on air
From: Paul Nicholson <[email protected]>
Date: Sun, 03 May 2015 06:16:31 +0000
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Markus wrote:

> somewhat patchy on Paul's steerable VLF-spectrogram.

Yes, there is something wrong with the phase.  The problem
is at my end - looks like a software change to the receive
timing about a week ago has produced a problem.

There is, intermittently, a lot of spiky phase noise.  It is a
delicate compromise between responding quickly to A/D clock drift
and maintaining a low phase noise.

Today I will fix it, if necessary I'll revert to an earlier version.

Your signal is somewhere between 0.05 and 0.10 fT and that should
have produced a quite solid trace on the spectrogram.

Paul Nicholson

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