Hi Mike,
very interesting what you are saying, I remember long months ago that I
prepared the RbO for the calibration with the 1 PPS from Thunderbolt.
Then I stored it away until today ...
Perhaps this I should look after, but today it is already too late ...
Would be great, if my nice box would do the job still some or better a
lot of years more!
Unfortunately I have actually also problems with my Thunderbolt output
of the 1 PPS. So, it is hard to be a timenut!
Thank you, regards,
Arnold
Am 28.02.2018 um 23:16 schrieb Mike Cook:
Hi Arnold,
It looks like your oscillator is locked to the rubidium and it is configured
to lock to an incoming PPS sig, but the TT value is null, so maybe you have
forgotten to connect the GPS? Or maybe to the wrong connector? Check the PPS in
to see if you have a good signal.
I don’t know about the ranges of the ad5,ad9 values. Yours are a little lower
than the one I have been looking at?
regards,
Mike
Le 28 févr. 2018 à 22:14, Arnold Tibus <[email protected]> a écrit :
Hello Michael and Tom, thanks for the quick reaction!
Of course I did already think that the rubidium cell doesn't work any more, but
then I was astonished after more than 1 hour running how precise the output
frequency is and I could not see a drift beyond the natural noise/ fluctuations
which I can see as well with Tr. Thundelbolt. I did not yet look deeper e.g.
observing the longtime behaviour nor did I open the box (yet), anyway I don't
know much about the electronic internals.
I have running the RbMon and looked to the data list which I have annexed. It
doesn't explain much for me therefore I am asking for help and support to find
possible solutions, there are so much excellent experts out here.
I am worried that in fact the Rb capsule went over the Jordan ... perhaps it
can be revitalized but I have no experience with it.
I doupt a bit the lamp heater control value etc., ad5 to ad9.
What is the range ... ? How shall one understand these and other values?
But finally, how can one improve the situation?
I am open for all good hints, instructions and ideas! (I am sure that there are
other timenuts also interested ;-) )
many thanks in advance
Arnold
Am 28.02.2018 um 21:02 schrieb Michael Wouters:
Hello Arnold,
A frequency offset of a part in 10E-11 still sounds healthy to me. I wonder
whether there is some kind of electronic problem?
I have run 40 or so PRs10s and the lamp is the usual bit that dies.
If you hook up a computer to the RS232 port, there are lots of diagnostics
available.
Cheers
Michael
On Thu, 1 Mar 2018 at 5:47 am, Arnold Tibus <[email protected]> wrote:
Hello fellow timenuts,
for my old PRS10 I need some information and help with technical
informations.
I have this item bought quite some years ago and I have manufactured an
interface cable with the special connector last year. Did work fine.
Taken out of storage I do get anymore the lock and PPS signal out.
The 10 MHz output does look very good, the unloaded sine voltage is 2.8
Vpp and the frequency is very precise and stable very close to the
trimble thunderbolt GPS-out signal at abt. 10E-11.
In the annex you can see the data output with more delailed info.
Can somebody tell me more, is the life at the end and what and how can
be done to revitalize this nice time machine? How much time more is
expectable?
kind regards,
Arnold
_______________________________________________
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.
_______________________________________________
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.
_______________________________________________
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.
"The power of accurate observation is commonly called cynicism by those who
have not got it. »
George Bernard Shaw
_______________________________________________
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.
_______________________________________________
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.
