|
Hi Paul,
thanks for the explanation, perfectly understood. I
was actually a bit worried as I tend to regard the Todmorden spectrogram as a
kind of gold standard for sensitivity and accuracy. Well, thanks once again for your outstanding and continuous
work!
All the best,
Markus
Sent: Sunday, May 03, 2015 8:16 AM
Subject: Re: LF: Re: Re: 8270Hz - on air
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
--
|
