[time-nuts] Any guesses as to how Citizen is claiming ±1 second/year with using this AT-cut 8.4MHz XTAL?
phk at phk.freebsd.dk
Wed Apr 11 16:15:42 EDT 2018
In message <email@example.com>, tnuts at joshreply.com writes:
>That comes out to about 30ppb, and this is a pocket watch so they don't seem
>to depend on the temp stabilization of being attached to a human wrist.
For an application where neither phase noise nor jitter matters,
it is certainly feasible to measure the tempco of the X-tal at the
factory and let a micro-power computer use temperature measurements
to model the "perfect" frequency and phase.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
More information about the time-nuts