[time-nuts] The "NAKED" 5065A optical unit

Poul-Henning Kamp phk at phk.freebsd.dk
Wed Feb 21 10:37:53 EST 2018

In message <20180221163511.b8d6eec26415fe16e66e44f1 at kinali.ch>, Attila Kinali w
>On Tue, 20 Feb 2018 09:36:49 -0700
>Mark Goldberg <marklgoldberg at gmail.com> wrote:
>> I don't know anything about these devices, but for TCXOs, the power supply
>> noise significantly affects the phase noise of the output. An LM317 is not
>> well specified for noise and I expect is is orders of magnitude worse than
>> something like an LT3042 low noise regulator.
>It's >30dB for broadband noise, according to Gerhard Hoffmann's measurement:

Just to point out that you are rapidly heading down a blind alley from
where this topic started:

I was talking about driving the single-transistor UHF generator which
ionizes the Rb in the lamp, so far I have not even established if
this voltage affects the HP5065 performance in the first place.

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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