[time-nuts] Beginner's time reference
SAIDJACK at aol.com
SAIDJACK at aol.com
Fri Dec 11 01:53:02 UTC 2009
Hi John,
but you may not be comparing apples to apples.
Tom's plots are actual performance of probably a very good sample unit.
The 5071A spec lines you drew are worst-case specs.
In reality, the 5071A probably performs much better than it's spec limits?
Also, I think the 5071A "just" has a good 10811 OCXO in it as well, so the
short term performance of the 5071A is probably limited by that OCXO.
bye,
Said
In a message dated 12/10/2009 17:48:57 Pacific Standard Time,
jmiles at pop.net writes:
It's interesting to consider how well a GPS clock can perform relative to
a
local cesium. I took a plot (attached) of a Thunderbolt with a 10811-60109
(t=850s) and one of the sub-$100 LPRO-101 rubidiums, then drew some lines
on
it to indicate the spec limits of one of the better cesium standards (the
HP
5071A). I also tried to copy the traces from Tom's Z3801a at
http://www.leapsecond.com/pages/gpsdo/ onto the plot.
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