[Premium-Rx] Filter phase response

[Oleg Skydan]

Hi, All !
> The best I've found for
> lowfer CW signals is a sixth order Gaussian passband shape passive LC
filter
> with 30 Hz bandwidth.  Forget about the DSP filters for this application.
> They are third on the list, following active switched capacitor filters.
LC
> passive filters are the best.  No added noise, smooth filtering and the
> Gaussian shape gives minimum ringing.  If you need to get rid of strong
> carriers close to the signal you're after then some other spectral shape
> would probably be better.

I do a some work with DSP (http://users.ints.net/skidan/T03DSP/ ) and
wonder why DSP filters are third ?
We can easily implement Gaussian filter in DSP and if it is designed
properly
it should have less noise then the switched caps one.

Or may be you meant FIR filters when you said "DSP filter" ?

All the best !
Oleg
73 de UR3IQO