[time-nuts] Lucent KS-24361 Ref1 burnin after 1.8 weeks

paul swed paulswedb at gmail.com
Sun Nov 23 01:49:56 UTC 2014


It is getting better today about 80-90 count positive.

On Thu, Nov 20, 2014 at 7:08 PM, Bob Camp <kb8tq at n1k.org> wrote:

> Hi
>
> I’ve posted a couple of phase plots of a few of the KS-24361 compared to a
> 5071A and to each other via a TimePod. Since phase is essentially time,
> it’s a good way to get an idea of what’s going on. Spot checks with a
> terminal program and SCPI appeared to show reasonable agreement between
> phase and what the status screen reported. I can probably come up with more
> data if the world has not gotten tired of looking at plots.
>
> I suspect that for long term data, there is some sort of “simple” SCPI
> that just gets the time error. The full status screen is not very good for
> that kind of use. It takes more than a second to compile inside the box.
>
> Bob
>
> > On Nov 20, 2014, at 7:00 PM, Anthony Roby <aroby at antamy.com> wrote:
> >
> > Bob - what data are you capturing / measuring? I was thinking of just
> writing a simple capture program from the unit and analyzing it in Excel.
> When you say the status screen correspons to the data you've measured, what
> is it that you are comparing?
> >
> > Anthony
> >
> > -----Original Message-----
> > From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of Bob
> Camp
> > Sent: Thursday, November 20, 2014 5:05 PM
> > To: Discussion of precise time and frequency measurement
> > Subject: Re: [time-nuts] Lucent KS-24361 Ref1 burnin after 1.8 weeks
> >
> > Hi
> >
> > Based on what I ??ve seen on multiple boxes, I believe that the graph
> you have been looking at for TI is messed up due to a software bug.
> Checking things with a terminal program, the status screen corresponds
> pretty well to the data I ??ve measured.
> >
> > Bob
> >
> >> On Nov 20, 2014, at 4:40 PM, paul swed <paulswedb at gmail.com> wrote:
> >>
> >> I have been snapping pix so can compare now.
> >> Getting better.
> >> Regards
> >> Paul
> >>
> >> On Thu, Nov 20, 2014 at 12:14 PM, Anthony Roby <aroby at antamy.com>
> wrote:
> >>
> >>> I'll fire up my lab PC and take a more recent screenshot of my data -
> >>> when I last looked the EFC was a straight line and PPS TI / s had
> >>> settled down but was still noisy.
> >>>
> >>> -----Original Message-----
> >>> From: time-nuts [mailto:time-nuts-bounces at febo.com] On Behalf Of paul
> >>> swed
> >>> Sent: Thursday, November 20, 2014 10:24 AM
> >>> To: Time-nuts
> >>> Subject: [time-nuts] Lucent KS-24361 Ref1 burnin after 1.8 weeks
> >>>
> >>> As suggested by Bob and others the REF1 new out of the box needs time
> >>> to burn in. At 1.8 weeks now I can see the EFC settling down towards
> >>> a straight line. To start I was about 800 counts per day rising.
> >>> Today 150 and rising. So it is slowly shifting towards what a z3801
> >>> as an example will do.
> >>> Also ultimately it will look like an example Antony sent me. Simply
> noisy.
> >>> The 3801 is fairly smooth.
> >>>
> >>> So I sense my earlier concern of a "Bad box" is wrong. Pretty happy
> >>> about that.
> >>> Regards
> >>> Paul
> >>> WB8TSL
> >>> _______________________________________________
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