[time-nuts] 5680 performance very first impressions, update

[Mark Spencer]

Update..   The unit has been running continuously since my last test.   I collected approx 10 hours of data last night and the Adev is slightly better now.   (Approx 1.5 thru 2.0 E-12 from 100 thru 400 seconds.   At 2,000 seconds the Adev is approx 2.6E-12)   

I also noticed that the unit is quite sensitive to mechanical shock.

That being said I still believe I got my moneys worth for $40.00

I've also characterized the performance of FTS1050 I am using as a reference and I am fairly certain that the performance of the FTS1050 is well into the 13's at these time periods.


Regards
Mark Spencer



--- On Fri, 2/3/12, Mark Spencer <mspencer12345 at yahoo.ca> wrote:

> From: Mark Spencer <mspencer12345 at yahoo.ca>
> Subject: 5680 performance very first impressions.
> To: "Discussion of precise time and frequency measurement" <time-nuts at febo.com>
> Received: Friday, February 3, 2012, 8:04 PM
> I've seen some comments and questions
> regarding the performance of the 5680 Rb's.
> 
>  Yesterday I took delivery of two
> 5680's.   In case anyone is interested, I'm
> seeing adev numbers in the 2 to 2.5 E-12 range from 80 thru
> 200 seconds.   The unit under test has been
> running for approx one hour and I let it warm up for 30
> minutes before collecting data.
> 
> The reference is an fts1050 and the data is being collected
> with an hp 5370B.
> 
> Not to bad for $40.00 IMHO.
> 
> Regards Mark Spencer