Re: [Elecraft] group delay distortion

2007-05-08 Thread Brian Lloyd, WB6RQN
Barry N1EU wrote: > I find that the most noticeable impact of a filter's group delay > characteristics is how they pass impulse noise, ie. lightning strike > QRN. The poorer filters tend to turn the short impulse into longer > roaring noise. The difference between filters can easily make the >

[Elecraft] group delay distortion

2007-05-08 Thread Barry N1EU
I find that the most noticeable impact of a filter's group delay characteristics is how they pass impulse noise, ie. lightning strike QRN. The poorer filters tend to turn the short impulse into longer roaring noise. The difference between filters can easily make the difference in being able to p

Re: [Elecraft] group delay distortion

2007-05-08 Thread Jack Smith
Doug: Group delay is a measure of phase shift (and hence time delay) for a signal as it passes through the filter. Consider a signal swept through the bandpass of a filter. If the signal always takes the same time to pass through the filter, regardless of where it is with respect to the pass

[Elecraft] group delay distortion

2007-05-08 Thread DOUGLAS ZWIEBEL
Hi all: Okay, I'm not an engineer. Just what is group delay distortion? Please reply direct, unless you feel that the group could learn something. de Doug KR2Q ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net You must be a subscriber to po