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

timeok at timeok.it timeok at timeok.it
Fri Jun 8 10:36:08 EDT 2018


   Hi Adrian,
   as you know, to get real data up to 100K sec range, you should acquire at least 500K 1M sec.
   I say this from my personal experience. Soon I will have my 30 days run for both the A and B version of the HP5065.
   Very interesting the response of the GPSDO in the range 1 to 100 sec that I had never had the chance to see for lack of an instrument as your A7.
   ciao,
   Luciano


   Da "time-nuts" time-nuts-bounces at febo.com
   A time-nuts at febo.com
   Cc
   Data Fri, 8 Jun 2018 15:46:50 +0200
   Oggetto Re: [time-nuts] Raw phase data of super-5065
   This is a 6 days run of a modified 5065'B' against GPS.

   Adrian

   Am 08.06.2018 um 14:05 schrieb timeok at timeok.it:
   > Here a ten days simultaneously run of the A and B version compared with my HP Z3816A GPSDO.
   > Luciano
   >
   >
   > Da "time-nuts" time-nuts-bounces at febo.com
   > A kb8tq at n1k.org
   > Cc "time-nuts" time-nuts at febo.com
   > Data Wed, 6 Jun 2018 08:18:27 +0200
   > Oggetto Re: [time-nuts] Raw phase data of super-5065
   >
   > 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
   >
   >
   > 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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