[time-nuts] PRS10 Information and help needed

Tom Knox actast at hotmail.com
Wed Feb 28 13:55:30 EST 2018

Hi Arnold;

If you compare the 10MHz to another standard it will most likely show the quartz is in free run. Since quartz acts as a fly wheel for the rubidium the output would look good from all other aspects (Amplitude and Spectral Purity). So it appear to me you are experiencing an issue with the Rubidium Section.

I hope that helps.


Thomas Knox

From: time-nuts <time-nuts-bounces at febo.com> on behalf of Arnold Tibus <arnold.tibus at gmx.de>
Sent: Wednesday, February 28, 2018 11:47 AM
To: time-nuts at febo.com
Subject: [time-nuts] PRS10 Information and help needed

Hello fellow timenuts,

for my old PRS10 I need some information and help with technical
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

kind regards,


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