[time-nuts] PRS10 Information and help needed

Arnold Tibus arnold.tibus at gmx.de
Wed Feb 28 16:51:34 EST 2018


As I have the impression that my very small data pdf was not 
transferred, I add therefore this explanatory data again but in open 
document format odt with 10 kB. Hopefully this will pass now.

Arnold

Am 28.02.2018 um 22:14 schrieb Arnold Tibus:
> 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 <arnold.tibus at gmx.de> 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
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> 
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