[Elecraft] Bandpass filter tutorial (was K3 Filters)

[Barry N1EU]

Al makes a good point - the steepness of the digital filter skirt
makes a big difference in what you hear.  In high QRN condx on cw
(i.e., narrow selectivity), it's often desirable to use shallower
sloped dsp filtering to avoid ringing.  Has there been any discussion
about a K3 menu option to vary the dsp filter slope?  Several other
DSP/SDR radios allow you to vary a "TAPS" setting for the digital FIR
filters.


>So the amount of ringing depends on the filter bandwidth and the steepness
of the filter skirts.  The narrower the bandwidth and the steeper the
skirts, the more ringing.

>The above is true for both digital and analog filters.

73,
Barry N1EU