HI > On Jun 6, 2018, at 2:18 AM, tim...@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" kb...@n1k.org > A "Luciano Paramithiotti" tim...@timeok.it,"Discussion of precise time and > frequency measurement" time-nuts@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, tim...@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-boun...@febo.com > > A "Discussion of precise time and frequency measurement" time-nuts@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 > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > > _______________________________________________ > > time-nuts mailing list -- time-nuts@febo.com > > To unsubscribe, go to > > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > > and follow the instructions there. > _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.