[Elecraft] [K3] Phase Noise / CW Key Clicks

[Ian White GM3SEK]

David Gilbert wrote:
>
>True.  As I said in another post, I'd love to see someone write an SDR 
>application that captured and quantified such things, but in the 
>absence of that screenshots from a scrolling spectrum display 
>(waterfall) would help.  The problem is that you lose the amplitude 
>information when you use the waterfall that is necessary to establish 
>the time correlation between center frequency and spurious crap.  With 
>a normal spectrum analyzer that shows amplitude you can't see the 
>correlation in a screenshot.
>
>Maybe it's possible to display a 3D spectrum display!   ;)
>

It isn't necessary to measure or quantify key-clicks and splatter. For 
the purposes we are discussing here, the only requirement is to show 
that a signal is notably worse than others of similar strength nearby.

A SVGA waterfall display with a good amplitude-sensitive color palette 
and faster scrolling can show up these defects very clearly indeed. 
Those features are standard in most PC-based SDR software, but have not 
yet been implemented in the P3SVGA firmware.

The other requirement, as already noted, is to capture the image quickly 
and easily from the P3SVGA for future use.


-- 

73 from Ian GM3SEK
http://www.ifwtech.co.uk/g3sek