[time-nuts] Tbolt temperature sensor
SAIDJACK at aol.com
SAIDJACK at aol.com
Thu Feb 5 08:59:08 UTC 2009
Hi Tom,
yes, they are all GPS locked.
here is the same OCXO type without proper temp compensation:
_http://www.jackson-labs.com/images/gpsstat.htm_
(http://www.jackson-labs.com/images/gpsstat.htm)
You can see that now the phase has to change considerably to compensate for
the EFC voltage change (because tempco has not been properly established yet).
To have the TIC compensate, it needs to detect a phase offset first. This
error will be prevented if the tempco already compensates properly for
temperature changes.
As the proper tempco is established, the phase offsets diminish in magnitude.
bye,
Said
In a message dated 2/4/2009 21:58:18 Pacific Standard Time,
tvb at LeapSecond.com writes:
In that case, how do you distinguish in the plots between
the GPS phase locking reaction to the OCXO starting to
go off-frequency and software temperature compensation?
How much of the correction in the plots is due to normal
phase locking against GPS and how much is due to your
temperature sensing and compensation?
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