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To: Larry Holmes who wrote (1554)	7/8/1999 10:39:00 PM
From: Bob Walters	Read Replies (2) \| Respond to of 7618

HUH?

To: Larry Holmes who wrote (1554)	7/9/1999 1:13:00 PM
From: Lyle Abramowitz	Read Replies (1) \| Respond to of 7618

Larry, I'll babble a bit. (1) If you take "standard" wave equations using very complex math, then, set the frequencies at or near zero, most of the complicated stuff falls out. I recall doing so in an exercise in one of my "RF type" classes in school. I think you are referring to what is known as the "complex (as in imaginary numbers) envelope" or "low-pass equivalent" representation of a modulated waveform. Basically it allows one to remove the carrier waveform from the baseband but still retain the important phase relationships. This technique does simply analysis somewhat although in my view the greater benefit is that one can actually form such signals from what is received and can process them at rates far below those that would have been required if the RF was still present. These signals are not precisely equivalent to the original modulated RF in all cases but are usually good enough by a very large margin. I still don't know any more about wideband transmission over power lines--perhaps I'll try to look into it some more. Any news about DWM--I think it's time to stick a fork in it as it seems done. It looks like cable or fiber will be the way most of us access broadband. LA