[time-nuts] HP 5065A Start-Up
timeok at timeok.it
timeok at timeok.it
Fri Dec 11 01:27:17 EST 2015
Jim,
> Except...
>
> Microphonics.
>
> What's the norm here? I see it in the 2nd harmonic level on the panel
> meter. It runs about 20 normally, but a pretty light tap (with my
> fingernail) anywhere on the instrument can peg the meter for a few
> seconds. While I had the scope on A8 TP2 / TP3 (showing the off-resonance
> phase shift peak it manifested as bursts of noise) It's hard to localize -
> but I think the RVFR and Synthesizer are the most sensitive.
20 is the border level of the 2nd harmonic (20-40). After some week of continuous operation can happen the signal level increase otherwise an adjustment is necessary.
I had the same experience on some HP5065A revived after a long period of inactivity. The microphonics is high during the first few weeks of operation, then later recedes.
I could see about a dozen HP5065A that I had in my hands that a reduced microphonics is a feature common to all HP5065A.
Luciano
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts [1]
> and follow the instructions there.
>
>
>
> Links:
> ------
> [1]
> http://webmail.timeok.it/parse.php?redirect=https://www.febo.com/cgi-bin/ma
> ilman/listinfo/time-nuts
>
Message sent via Atmail Open - http://atmail.org/
More information about the time-nuts
mailing list