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

[Bob Camp]

Hi

Since the data comes out of the box in percent, the whole “counts” thing is a bit of a fiction. The conversion to counts or bits was done based on observations of earlier boxes. That conversion may or may not apply to the 3810/11/12’s. Right now, there’s no reason to think that it’s wrong for these boxes. I’d just be careful watching the data.

Bob

> On Nov 22, 2014, at 8:49 PM, paul swed <paulswedb at gmail.com> wrote:
> 
> 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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