On 1/12/2013 7:40 AM, Magnus Danielson wrote: > > At 250 ps you use interpolators. The typical coarse counter would be 100 MHz > and that means 10 ns in raw resolution, but you would then use an > interpolator to get higher resolution. By getting a start and stop measure, > roughly tau time inbetween each other you get > f = (t_stop - t_start)/tau > assuming t_start and t_stop trigger from the same source. >
This may not be of interest, and if so, I'll drop it. But I was thinking that if they go to some kind of fallback interpolation the time interval measurements at a more-or-less fixed frequency might still be pretty good. (I think along these lines because maybe someday a battery-bad unit might show up which is not so good at umpty-GHz measurements but still OK for TIC) If it had a systematic error at 10MHz it seems like maybe that would just fall out in the wash. (?) Chris _______________________________________________ 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.
