Yes, very smart, this analog time-stamping approach. On Sat, Jul 7, 2012 at 12:36 AM, John Miles <jmi...@pop.net> wrote:
> > > > -----Original Message----- > > From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On > > Behalf Of Azelio Boriani > > Sent: Friday, July 06, 2012 2:36 PM > > To: Discussion of precise time and frequency measurement > > Subject: Re: [time-nuts] disciplining sound card > > > > Exactly: this prevented me to buy the ESI Juli@ sound card. It was > > suggested by a fellow time-nut and this card is indeed very interesting > but > > in my opinion sound cards are not well defined about the sampling > process. > > I need more details. The Juli@ has the greater than usual bandwidth, not > > limited to the audio spectrum but up to 90KHz, so it is perfect as a > > general digitizer for the VLF radio spectrum (DCF77, WWWB and others). > > I may have missed some details about the intended use, but in any event, > the > latency between the ADC and the software is influenced by a large number of > factors, some of which will introduce more uncertainty than the pipeline > characteristics of the ADC itself. The best workaround might be to couple > some 1-pps energy into the signal being digitized. This would effectively > 'timestamp' the samples at the point where they are acquired, so the > latency > would no longer be an issue. > > -- john > www.miles.io > > > _______________________________________________ > 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.
