[time-nuts] Raw phase data of super-5065

Bob kb8tq kb8tq at n1k.org
Wed Jun 6 09:21:11 EDT 2018


HI

> On Jun 6, 2018, at 2:18 AM, timeok at timeok.it wrote:
> 
> Hi,
>  
> certainly the environmental effects are significant and it is precisely for this reason that
> acquisitions have been made simultaneously on two 5065, one modified and the other not.
> 
> To verify the results the same measures were taken with another pair of 5065, one modified and the other not. 
> This second test was carried out at another site 300Km from the first one. 
> 
> Both tests showed a better and more consistent medium/long term ADEV than the unmodified HP5065A.
> 
> I want to clarify that these measures have the objective of verifying the medium / long term stability and not the short term stability of the Super version I agree it is improved..
> 
> Luciano


Since my basement does one set of things ( temperature / humidity / pressure ) and somebody else runs in the garage ( different temperature / humidity / pressure) 
the data will be very specific to a single set of environmental conditions. Temperature is relatively easy to monitor, humidity and pressure are a bit more complex.
At least logging them so people can compare your setting to there’s does need to be part of the process.

Bob

> 
> 
>  	
> Da "Bob kb8tq" kb8tq at n1k.org
> A "Luciano Paramithiotti" timeok at timeok.it,"Discussion of precise time and frequency measurement" time-nuts at febo.com
> Cc
> Data Tue, 5 Jun 2018 10:05:34 -0400
> Oggetto Re: [time-nuts] Raw phase data of super-5065
> 
> Hi
>  
> It is pretty well known that without “help” ( beyond the filter stuff on the super) the 5065 has fairly poor temperature
> stability and somewhat variable response to pressure and humidity. Taking two samples right off the production line
> likely would have given you different long term data as a result.
>  
> If you are going to the trouble of watching these devices for a long time, monitor temperature, pressure and humidity.
> I suspect you will find correlations ….
>  
> Bob
>  
> > On Jun 5, 2018, at 5:44 AM, timeok at timeok.it wrote:
> >
> >
> > Hi Attila,
> > I am doing the long therm stability test on a couple of HP5065, one original A type, the second B or "super" compared with my best long therm stability, a GPSDO HPz3816A.
> > This test will be 30 days long. It is a second test, with a second couple of HP5065A/B, to verify the long therm stability of both the version.
> >
> > Up to now the data available for version B or "super" only concerned the improvement of phase noise.
> >
> > From the first results it seems that the HP5065A is more stable within 30days than the modified version with the filter.
> > It must be considered that the short-term stability of 5065 is better than the GPSDO / TICC up to 10-80k sec then, in this test configuration the valid data will be beyond these values.
> > The results will be ready within 28 days and I will be happy to share them in order to have everyone's opinion.
> > Regards,
> > Luciano
> >
> >
> > Da "time-nuts" time-nuts-bounces at febo.com
> > A "Discussion of precise time and frequency measurement" time-nuts at febo.com
> > Cc
> > Data Mon, 4 Jun 2018 10:11:50 +0200
> > Oggetto [time-nuts] Raw phase data of super-5065
> > Hoi zäme!
> >
> > Would one (preferably multiple) of the owners of a super-5065 be so kind
> > and share the raw phase data of an super-5065 against a stable reference
> > with me? The longer the data trace, the better.
> >
> > Thanks in advance!
> >
> > Attila Kinali
> >
> > --
> > It is upon moral qualities that a society is ultimately founded. All
> > the prosperity and technological sophistication in the world is of no
> > use without that foundation.
> > -- Miss Matheson, The Diamond Age, Neil Stephenson
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