[EMAIL PROTECTED] wrote: > C) I don't believe the Z3801A has 100ps single shot resolution and accuracy > (for resolution doesn't do anything without accuracy) until someone will > prove it to me. And even then it would be wasted resolution since the GPS > 1PPS > source noise will totally swamp out any benefit a 100ps resolution would > give. > Said
The timestamp resolution may well be much greater than needed particularly if they leveraged an existing well characterised and debugged design from another product. This can save time and money over the alternative of developing a time stamp circuit with just the appropriate resolution. You have to be more precise in your definition of accuracy. An unknown but very stable time offset is of little consequence when disciplining an OCXO, however a scale error is another matter. Thus an interpolator with an unkown offset of a few nanoseconds which is stable to within a few tens of picoseconds allows an interpolator with a resolution of say 100ps sec to be useful if its gain is known sufficiently accurately and the signal being timestamped has sufficient stability. Bruce _______________________________________________ time-nuts mailing list time-nuts@febo.com https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts