From: "Murray Greenman" <[EMAIL PROTECTED]> Subject: RE: [time-nuts] Fast frequency counting question Date: Mon, 5 May 2008 09:01:38 +1200 Message-ID: <[EMAIL PROTECTED]>
Murray, > Thanks for your reply. Yes, I believe Leon has 30dB gain post mixer. He > is using an FSS 1000E as his mixer. So, we don't think the problem is > slew-rate limiting. Your suggestions for checking the performance with > changes in level is a good one. It should be standard practice... it is simple enought to rule it out. A simple -6 dB pad away. However, I am starting to consider that you are primarilly single-shot resolution limited. > This is an area of counting I've not considered before. We are working > with the chip manufacturers, and they report the problem, which we would > like to replicate. Personally I can't see it as an issue, but it has > been raised, and we would like to understand how to measure it. The chip > manufacturer has a high-speed A-D system and some method (unknown to us) > for post-processing the data. > > I've suggested that Leon reply to you directly, as he has a better grip > on what the problem and requirement is. I understand that the problem is > relayed to warm-start TTFF performance in a GPS application. OK. I'd happy to help you out. Cheers, Magnus _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
