[time-nuts] Fine print on HP 5334B
David I. Emery
die at dieconsulting.com
Thu Feb 22 16:16:02 EST 2007
On Thu, Feb 22, 2007 at 12:29:35PM -0800, John Miles wrote:
> What do people observe on their 5370A/Bs? After warmup, I tend to see a
> bias of about +0.0005 Hz, or 5E-11, when observing its own 10 MHz source.
> There is some occasional random waffling on the order of about +/- 0.001 Hz
> but for the most part it reads close to 10.000 000 000 5.
> I have never been able to calibrate the interpolators (specifically the
> anticoincidence adjustment) in these counters, due to lack of a
> vernier-adjustable pulse generator. When I was going through one last week,
> I just left the anticoincidence pot in the middle of its range, and couldn't
> see any ill effects from doing so. The manual is not that great at
> describing exactly what this adjustment does.
> -- john, KE5FX
Mine is off more (or was until it died a couple of weeks ago). But
I have yet to attempt the full cal procedure for reasons similar to yours.
I did find that using GPSDO 10 mhz the error was quite stable
(always reading low in my case, not high) but apparently just barely within
the spec in the manual.
Dave Emery N1PRE, die at dieconsulting.com DIE Consulting, Weston, Mass 02493
"An empty zombie mind with a forlorn barely readable weatherbeaten
'For Rent' sign still vainly flapping outside on the weed encrusted pole - in
celebration of what could have been, but wasn't and is not to be now either."
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