[time-nuts] PRS-45A

Bob Camp kb8tq at n1k.org
Tue Dec 9 19:11:16 EST 2014


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. 


> On Dec 9, 2014, at 6:22 PM, Bob Stewart <bob at 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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