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

rfnuts rfnuts at arcor.de
Fri Jun 8 09:46:50 EDT 2018


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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