[time-nuts] Different Thunderbolt versions

SAIDJACK at aol.com SAIDJACK at aol.com
Wed Feb 25 19:23:27 UTC 2009


Hi Ulrich,
 
notice that that plot also conveniently cuts-off the ADEV below 10s, where  
we can see it go up substantially at around 10s...
 
Guess they did not want anyone seeing their <10Hz performance; this is  
called good specmanship.
 
bye,
Said
 
 
In a message dated 2/25/2009 00:25:27 Pacific Standard Time,  
df6jb at ulrich-bangert.de writes:

It  should be noted that this plot shows a VERY PESSIMISTIC (almost  two
decades) behaviour of the GPS 1 pps, perhaps a remainder from SA and/or  a
not so well timing receiver. 

A M12+ would have its sawtooth  corrected 1 pps at 2-4E-12 @ 1000 s, giving a
crosspoint to the AD of the  rubidium alone anywhere between 1000s and 10000
s.

Best  regards
Ulrich




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