[time-nuts] Thunderbolt reception problems

WarrenS warrensjmail-one at yahoo.com
Tue Nov 24 05:17:01 UTC 2009


/tvb

- over approx what time frame was that RMS average taken?
a day or so, or forever? if nothing disturbs anything.


- what frequency reference did you compare against?
GPS, For the most part Using Lady heather plots.

Which is Just comparing it to the filtered GPS, and does not take into account GPS drift. 
(which is similar to what Said is plotting).
AND 
I have checked Lady heather plots against my 10811 set up and they agree very well when a high TC setting is used in the Tbolt, over times longer than the TC setting and shorter than the drifting rate of the 10811. 


I think the bigger deal is that Said is comparing a cheap little Tbolt using a 'poor' antenna feed, 
and has not been optimized except for some basic guess defaults and 
now can't  tell if it is the $1,500 + GPS tracked Rubidium or the Tbolt that is in error.
I'd say the Tbolt is doing Great. 


ws

****************
> The Tbolt can get down to the 3 ns RMS range with care and luck.

- over approx what time frame was that RMS average taken?
- what frequency reference did you compare against?

/tvb




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