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Re: LF: Spectrum Lab Filtering...

To: rsgb_lf_group@blacksheep.org
Subject: Re: LF: Spectrum Lab Filtering...
From: wolf_dl4yhf <dl4yhf@freenet.de>
Date: Sun, 08 May 2011 10:36:57 +0200
In-reply-to: <4DC5AB0F.4090507@iup.uni-heidelberg.de>
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Hi Stefan,

Two or more frequency ranges for the auto-notch filter are already on the to-do list. Main problem will be where to put the graphic controls in the already too crowded user interface ;-)
73,
   Wolf .

Am 07.05.2011 22:26, schrieb Stefan Schäfer:
Hi Scott,

I think there is not such a function so far. There is just a range where you can limit the auto notch apply, like 0...500 Hz.
Today i improved the readability of a CW signal. The side tone was at 
800 Hz. The filter has a BW of 200 Hz and 50 Hz slope. This is the 
best setting for a solid signal. Then i choosed the auto notch 
function but limited the operation range from 0...780 Hz and moved the 
filter so that the CW signal is still passing. These steps make the 
readability better than choosing a 100 Hz wide CW filter without the 
notch function. So the best (for optimising CW) would be to have two 
(or in your case: several) limiting ranges, i my case: 0...780 Hz plus 
820 Hz...2000 Hz. I asked Wolf if this is possible to implement but 
the easter WX was to good here, HI. And there are several other querys 
on his table too, i am sure :-)
Wolf? :-)

Best 73, Stefan/DK7FC

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