[time-nuts] Modern HP5065A adjustment ideas ?
Poul-Henning Kamp
phk at phk.freebsd.dk
Thu May 7 18:45:58 UTC 2020
I am finally getting to time to attend to my second HP5065A which never
really worked reliably since I found it on eBay.
The root-cause is now fixed, the digital divider part of the synthesizer
was unstable, because of the unobtanium one-shot being unstable.
I replaced the entire digital divider part with a LPC810 chip, which
can do the job admirably with its PWM output.
So now I am going through the entire unit and checking/tuning as I go.
Has anybody given any thought to how the tuning procedures can be
improved with access to more modern instruments ?
I'm particular interested if anybody know how to measure the S/N using
a HP8568B or HP3577A ?
I'm also wondering if a digital oscilloscope can monitor the phase
splitting a better way than with the X-Y mode display ?
--
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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