Good points Bruce. I know that Dave Allen and Fred Walls had no problem with the way I viewed PN issues. However, that was well over 20 years ago. Also a good point about the A/D. I should have known better as I designed a spectrum analyzer for a company that I worked for around 1975, and for LF signals I had it going directly into the A/D. I used digital filtering using the Remez algorithm (all elliptic, my favorites), but I believe the processing then was by DFT and not FFT. It is a good idea to have different points of view for trying to explain things, and I know a lot of times I probably take too many short cuts. Apologize for taking it personally. - Regards - Mike
Mike B. Feher, N4FS 89 Arnold Blvd. Howell, NJ, 07731 732-886-5960 -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Bruce Griffiths Sent: Thursday, January 17, 2008 4:38 PM To: Discussion of precise time and frequency measurement Subject: Re: [time-nuts] PM-to-AM noise conversion (was RE: New Question onHP3048A Phase Noise Test Set) Mike Feher wrote: > Well, in my opinion, it was no more complex than what you had to offer, and > there was never a mention of an FFT analyzer. FFT or not, it still has to > see a detector first prior to an A/D. Why? For baseband signals surely the ADC replaces the detector. > I just do not appreciate answers that do not contribute > anything of additional value. Unfortunately, I did not see anything in your > post that provided that additional value. Regards - Mike > > You are not the only one who reads these posts. Often rephrasing the explanation in several different ways can make it clearer to others. Whilst one's own explanation may seem perfectly clear and logical to oneself this doesn't necessarily mean that others see it in the same light. It all depends on the readers experience and background. Often its the unstated assumptions that make the explanation more comprehensible to others. > > > Mike B. Feher, N4FS > 89 Arnold Blvd. > Howell, NJ, 07731 > 732-886-5960 > > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.