The discussion on group delay and phase distortion in filters needs to be placed in the context of what distortions are really audible. It is well known in the field of psychoacoustics that the human
Hi John and all, placed in the context of what distortions are really audible. It is well known in the field of psychoacoustics that the human auditory system is remarkably insensitive to phase disto
filter. Yes, but what does the frequency amplitude response of the filter look like? where delta An artifact in a few Hz bandwidth is likely to be unnoticeable unless the signal or noise happens to c
situations, distortion weak Hi John, A time-distortion of ~18mS in the keying sidebands of a CW signal certainly would have a large effect on the CW sound, as it would on any noise pulses. Other tha
Tom and all, When you mention the 751, I assume it's the IC-751. I am not familiar with that radio, so it's difficult for me to comment without knowing more information. I do wonder if the 751 uses t
Hi John, I'm sure we agree the upper and lower sidebands are what allow us to have a change in signal level. After all, the CW signal is actually amplitude modulation of a carrier. I don't see how I
The presence of upper and lower sidebands does become a factor when passed through a filter if the signal is not properly centered in the filter and/or if the filter for some reason has an asymmetric
Hi there, I'm a research student in the field of optics. Recently I'm studying the effect of group delay ripple/phase distortion on an optical pulse. I wonder if there's such an analogy in the electr
wonder to The effects of phase distortion are completely analogous in both electrical and optical signals. I have worked professionally in both areas (I currently work in the area of ultra-high speed