[time-nuts] Fine frequency adjustment in 5370B

David Kirkby david.kirkby at onetel.net
Sun May 15 18:58:50 EDT 2005

Brooke Clarke wrote:
> Hi David:
> It's so easy to feed the PRS10 a 1 PPS from GPS so I don't understand 
> your comment "I don't have anything locked to GPS yet, but even when I 
> do, it is not always going to be that convenient for me"

Hi Brooke,

I will not be able to get a GPS signal where the test-equipment is 
physically located.

The best I am likely to be able to achieve is to keep the rubidium 
locked to the GPS, then move the rubidium, whilst it remains powered 
from internal batteries.

You do not always need the utmost in accuracy, and sometimes the 
convenience of having a reasonably accurate internal reference is quite 

If it's possible to 'see' sufficient satellites from an internal antenna 
by a South facing window (latitude 51.5 deg N, longitude 0 deg), then it 
might be practical to keep the equipment locked all the time.But I don't 
know how practical that will be.

David Kirkby,

Please check out http://www.g8wrb.org/
of if you live in Essex http://www.southminster-branch-line.org.uk/

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