[time-nuts] rapid startup GPSDO

jimlux jimlux at earthlink.net
Wed Jul 14 09:42:50 EDT 2010


Is there some (inexpensive) GPSDO that has a "time from power on in an 
unknown location to reasonably stable" in the <5 minute category?

Frequency accuracy in the 1E-9 range would be fine.

A regular old GPS has a Time to First Fix well under that, and it should 
be cranking out 1pps pulses with 1E-7 or 1E-8  precision pretty 
quickly.. Would it be fair to say that after 100 seconds, one could 
theoretically have driven that down another factor of 10?

As I understand it, a thunderbolt needs some number of hours after turn 
on to stabilize, but just how bad is it after, say, 5 minutes.




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