Hi John and Bruce, Thank you for your ideas. Now I have a much better picture for the experiment using the comparator. Now, my only concern is a noise generator. I have searched and found out that all the commercially available now generators are very expensive and some what out of my price range. What would you guys suggest for a noise generator? Do you think generating noise using a zener diode circuit is a good idea? Or any cheap noise generators are available in the market. Any one has any experience? As I am working in 8Ms/s zone, therefore the noise generator should be of high specs. I have a signal generator (Agilent Tech. 8648A). I can use the PM option in this signal generator to get the results, but again the only problem is a noise generator which I can use at the modulating input of the signal generator to modulate the RF signal.
Cheers Bilal ----- Original Message ----- From: "John Miles" <[EMAIL PROTECTED]> To: "Discussion of precise time and frequency measurement" <[email protected]> Sent: Saturday, March 03, 2007 3:28 PM Subject: Re: [time-nuts] External clock for Analog to Digital Converter inGPS Rx front-end > Yep, that's great as long as the comparator's already there or can be > easily > added. I was mainly wrinkling my nose at the idea of adding hybrid > combiners and the like, just to introduce some jitter. > > -- john, KE5FX > >> > Well, sure, but it also causes all kinds of secondary distortion >> > effects (such as potential clipping at the rails of whatever you're >> > feeding the signal into). I don't think AM'ing the signal when you >> > want PM is a good idea, when it's so easy to apply PM by itself. >> >> He's feeding a digital clock to an A/D. Someplace he has to >> "clip" the sine >> wave to make a digital signal. >> >> Feeding noise into the other side of the comparator seems like a good >> approach to me. >> >> >> > > > _______________________________________________ > time-nuts mailing list > [email protected] > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > _______________________________________________ time-nuts mailing list [email protected] https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
