[time-nuts] Trimble Thunderbolt setup optimization and addinga10811 OCXO
Arnold Tibus
Arnold.Tibus at gmx.de
Tue Jul 14 20:38:48 UTC 2009
On Mon, 13 Jul 2009 13:32:37 -0700, John Miles wrote:
>What are you using for the Kvco constant with your 10811-based Thunderbolt?
>If you don't back it down to -0.2 V/Hz, the loop's damping factor will be
>very wrong, which might confuse the firmware. Check the Kvco, and also do a
>factory reset after changing the OCXO to make sure it forgets anything it
>might be remembering about the OEM part. (You might try that, too, Arnold.)
>-- john, KE5FX
John,
I put in as K0 what I measured several times with the 10811
as 'gain' with -0.74 Hz/V. Is that not the right way? I tried to
use several times also higher values. The result was not impressiv,
did not give clear signs either.
A factory reset I did not perform yet, but I am trying at the moment
the proposed 0.2 or even a bit lower values. Tomorrow I will
check the result, but up to now I do not have a good feeling.
What about all these recovery parameter settings?
I believe that they are not really counting for this problem.
Regards,
Arnold
More information about the Time-nuts_lists.febo.com
mailing list