[time-nuts] [Bulk] Re: Ultra High Stability Time Base Options for 53132A

J. L. Trantham jltran at att.net
Sun Apr 12 08:03:33 EDT 2015


Bob,

Thanks for your thoughts.

It is hard to tell from the pictures that accompany the items but it appears some use the 'Vref' pin to obtain the control voltage and some do not.  If that indeed is the case, I wonder if using the Vref pin would offer a greater likelihood of better performance.

Also, how would you go about testing these Time Bases or 53132A?  Installing them in the 53132A, leave them on for 24 hours, do the 'CALTIMBAS' routine, then use the 53132A to measure your 'best' source?  If so, which source would you use?  I have GPSDO (TBolt, Z3816A, Z3805A, Lucent Z3810A, Lucent RFTGm-II-XO and Rb), Rb (5065A, LPRO, and others) or CS (5061A).  Also, how would you set up the 53132A and collect the data?

My question is how can I get the most stable and accurate 'stand-alone' counter, not having to connect an external reference?

Thanks for your help.

Joe

-----Original Message-----
From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob Camp
Sent: Saturday, April 11, 2015 5:04 PM
To: Discussion of precise time and frequency measurement
Subject: [Bulk] Re: [time-nuts] Ultra High Stability Time Base Options for 53132A

Hi

All of the MV-89’s that I have seen are very much a crap shoot in terms of what you get. Out of a dozen or so I’ve bought from various sources, none has met the original specs on the unit. There have been a wide range of issues. Doing a full test on one involves a lot of work. The problems with some of them are major the problems with others are fairly hard to spot. 

I do not believe that’s a reflection on the original design of the part. I’d bet that nearly 100% of them meet spec when new. I think it’s purely due to the amount of violence done to them when they are pulled from boards during the savage process. 

Bob

> On Apr 11, 2015, at 8:01 AM, J. L. Trantham <jltran at att.net> wrote:
> 
> Has anyone done any testing/comparison of the three aftermarket UHS 
> Time Base Options for the 53132A that are on theBay?
> 
> 
> 
> One is from Poland:  111643536543
> 
> 
> 
> Two are from China:  181698758773 and 331420737911
> 
> 
> 
> All use the Morion MV89A and all appear to be 'plug and play' with the 
> automated time base calibration process of the 53132A.
> 
> 
> 
> I recently added the 3 GHz Prescaler from the seller in Poland
> (111631156891) and was very satisfied.  No connection other than a 
> satisfied customer.
> 
> 
> 
> I also recently added the HP Opt 010, one of the 10811 based time 
> bases, and was very satisfied as well.  Just wondering if there is something better.
> 
> 
> 
> Thanks in advance for any thoughts.
> 
> 
> 
> Joe
> 
> 
> 
> 
> 
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