-------- Matt Huszagh writes: > "Poul-Henning Kamp" <p...@phk.freebsd.dk> writes: > > > The PRS-10 switches the polarity of the C-field solenoid at 5Hz to > > cancel out varying external magnetic fields. > > > > If that is not a concern for you, for instance because you use it > > in a stationary application, it can be disabled with the "MS0" command. > > > > It's all in the manual. > > How does the 5Hz switching relate to the 2s hump in the ADEV plot?
The manual says: "[...]the current in the coil is switched at a 5 Hz rate." You can either read that as: "There are five positive and five negative periods every second" or "The sign changes five times per second" It is not entirely obvious which reading is the correct one. When I experimented with it ages ago, I concluded the latter fit my data best, but that was a pretty early firmware version, with quite a number of variances from the manual. If your ambient magnetic field is stable, and it should be for time-nuts purposes, modulating the hyperfine transition is a bad idea, no matter the frequency. -- Poul-Henning Kamp | UNIX since Zilog Zeus 3.20 p...@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. _______________________________________________ time-nuts mailing list -- time-nuts@lists.febo.com -- To unsubscribe send an email to time-nuts-le...@lists.febo.com To unsubscribe, go to and follow the instructions there.