On 27/01/11 22:37, Tom Van Baak wrote:
By this (quite possibly imperfect) measure: When the EFC goes down
3:1, you have improved the thermals by 3X. If you started at 1 C
swings, the OCXO is now seeing 1/3 C swings.
Agreed (re: the EFC component that correlates to changes in Tbolt
ambient temperature).
A number of posts have mentioned LH measurements and
variations in DAC voltage or TI or OSC values. I'm curious
how close to the truth this is.
There are three observables to use:
time measurements (GPS t measurement)
frequency measurements (GPS f measurement)
DAC control values (PLL PI-loop output)
The last one is scaled by the EFC sensitivity which is uncalibrated and
non-linear.
The time and frequency measures is the observables towards GPS, for the
car analogy precision measurements against reference points along the road.
Cheers,
Magnus
_______________________________________________
time-nuts mailing list -- [email protected]
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.
