[Elecraft] Re: K3 Filter IMD numbers

[dj7mgq at muenchen-mail.de]

Hallo Don,

> I believe you have stumbled onto something that should be carefully 
> defined when testing with wide roofing filters when the DSP IF is set to 
> the more typical testing bandwidth of 500 Hz. <etc. etc. etc.> 

Stumble is the right word for it - I hadn't thought about this.

I would suggest that the DSP filter should have the "same" bandwidth as the
roofing filter for this kind of testing. I'm a photographer by training and
currently write software for TV graphics systems, so I am sure there are many on
the list who might have more sensible suggestions.

vy 73 de toby