:-) To borrow
Hancock's words, 5Hz that's very nearly a screenfull. I have pulled
my 600 screen down so you can see the strong lines which filled the
screen around 1400 today petering out at 8.971kHh 'ish. When they
have gone they have gone.
Looking at your split screen Grabber there are traces of the
vertical lines around 8.976kHz at the same time but they petered out
at about 8.971kHz I suspect.
73 Eddie
On 07/04/2011 17:35, Roger Lapthorn wrote:
Thanks Eddie, but we are only talking about 5Hz
difference and the signal is there on one window and not on the
other. Odd.
73s
Roger G3XBM
On 7 April 2011 17:24, qrss <[email protected]>
wrote:
Hi Roger
I don't fit your category, (understanding SL) however I often
see this, noise from the mains I suspect, huge dirty sine
waves. Considering they originate from a 50Hz source they are
strongest at lower frequencies, rarely climbing above 6kHz but
peaks sometimes get to 8.971kHz not much higher..
73 Eddie G3ZJO
On 07/04/2011 17:09, Roger Lapthorn wrote:
Help...
After lunch today my wife turned on the washing machine
and the tumble drier and for two periods there was a
burst of interference visible on the lower split screen
as vertical noise stripes. What I don't understand is
why I don't see these also on the upper trace around
8.976kHz too when the settings are the same. I have a
SL filter selected but it is centred around 8.970kHz
with 400Hz width and slopes so this cannot explain this.
Surely the noise bursts should appear in both parts of
the screen?
Can someone who understands Spectrum Lab explain this
please?
73s
Roger G3XBM
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http://www.g3xbm.co.uk
http://www.youtube.com/user/g3xbm
https://sites.google.com/site/sub9khz/
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