[time-nuts] HP5065A C-field current is temperature sensitive
phk at phk.freebsd.dk
Wed Aug 19 17:45:03 EDT 2015
Tonight I hooked my HP34972A DAQ up to the HP5065A and struck gold
right away: The reference zener has a tempco of 20PPM.
Possibly also of interest: The C-field driver is not very good
and noise on the +20V supply leaks straight through it.
Full details and plots here:
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.
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