Thanks Bob,
I got the Monitor software just now. The unit has 92,902 hours on it, which is
a bit over 10.6 years. I need to head out the door, but here are a few values
from the screen. I'll figure out how to get a status log out of it later.
Clock Servo:Ramsey Error 0 mvRabi Error -1 mvOCXO CV 3151 mvDeviation 194
Zeeman Servo:Ramsey Error 0 mvRabi eError -28 mvC Field CV -32 mv
Cesium Oven 4.80 VEM Voltage 8.00 VIon Pump 23 uAC-Field 19.10 mAIonizer 0.87
VMass Spec 14.10 V
The monitor checks every 10 seconds, so these are a bit dynamic. So, is this
in good health, or do I need to worry?
Bob
From: Bob Camp <kb...@n1k.org>
To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency
measurement <time-nuts@febo.com>
Sent: Tuesday, December 9, 2014 6:11 PM
Subject: Re: [time-nuts] PRS-45A
Hi
Somewhere in / on the beast there should be a magnetic field adjustment. You
play with it (within reason) to get the thing “on frequency”. The real question
being: do you care that it’s 1x10^-13 off frequency? In most cases, the answer
is no and you move on.
Yes, if you are going to do the adjustment thing, figure out a fixed location
before you go to all the trouble. Also let it sit for a bit to “settle in” to
the local mag field. I would not play with any adjustments for a week.
Bob
> On Dec 9, 2014, at 6:22 PM, Bob Stewart <b...@evoria.net> wrote:
>
> Subject changed, as I inadvertently stole Dan's thread.
>
> Hi Bob Camp,
> You wrote: "Looks perfectly normal to me. Your Cs is sensitive to magnetic
> field. Have you “zeroed” it out? No of course not, nobody does. (almost
> nobody …). "
>
> What does it mean to "zero out the magnetic field" for a Cs? Sounds like I
> need to align something to local magnetic north. What? I suspect that
> figuring out a way to mount it to the wall (no rack system here) is going to
> be my next priority. It can't safely live on my bench or the floor with all
> those perforations in the case covers.
>
> The people at Symmetricom indicated I should be able to download the monitor
> software, but the registration process seems to take some time. Hopefully
> that gets resolved soon.
> Having this thing hooked up just for this short time has pointed out some
> problems that I couldn't see without a reference that I trusted.
>
> Bob
>
>
>
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