Hi Bob,
I'm starting to think it's something as mundane as a cold solder joint or a bad
cap. Though neither of those ideas explains why it's usually so periodic.
Maybe it is the antenna. I have an idea about how to get something up on the
roof without anyone complaining. I'll give it another test when that happens.
Right now I've got a new board to design with improvements Dan and I have made
on the prototype.
Thanks for everyone's help and suggestions. I'll let it alone for awhile.
Bob
From: Bob Camp <kb...@n1k.org>
To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency
measurement <time-nuts@febo.com>
Sent: Wednesday, December 10, 2014 7:33 PM
Subject: Re: [time-nuts] KS problem
Hi
> On Dec 10, 2014, at 6:24 PM, Bob Stewart <b...@evoria.net> wrote:
>
> Hi Bob,
> I tried looking at the log in the Z38XX program (in wine), and I just get a
> blank.
That suggests that Z38xx (at least under wine) has yet another bug when running
on the KS boxes. That’s not a big surprise. The program got a number of
re-writes each time a new box came out. It’s obviously got a major issue
parsing some of the string formats from this generation box.
> So, I brought up Satstat in a Virtualbox and there's nothing of any
>consequence. There are the entries today when I started moving antenna ports
>around, and then nothing back till 12/5 when I was trying the attic antenna as
>a test.
I would write a script and do the scpi poling for the EFC. Log that to a text
file and take a look at what it’s doing in text. The output is a percentage of
max EFC expressed in scientific notation. The display on Z38xx is translated
into HEX in an arbitrary way that made sense on a Z3805. It’s never been
debugged against a 3810/11/12.
If you want to get exotic with the script, bring up the status screen every
10th second or so so you can take a look at sat tracking.
Bob
>
> Bob
>
> From: Bob Camp <kb...@n1k.org>
> To: Bob Stewart <b...@evoria.net>; Discussion of precise time and frequency
> measurement <time-nuts@febo.com>
> Sent: Wednesday, December 10, 2014 5:04 PM
> Subject: Re: [time-nuts] KS problem
>
> Hi
>
> Have you dumped the log file from the KS and seen what it says about the
> tracking?
>
> Bob
>
>
>
>> On Dec 10, 2014, at 2:13 PM, Bob Stewart <b...@evoria.net> wrote:
>>
>> I've been uncomfortable with this KS since I got it; even having to return
>> the REF-0 unit for comms problems. Now that I have the PRS45A, I think I've
>> proved that the KS does have a problem. Has anyone else had something like
>> this plot shows? Any idea what's causing it? I'm not seeing anything like
>> this on my home-grown unit, but that uses an LEA-6T instead of a UT+.
>> This plot is the phase difference between the 10MHz from the KS vs the 10MHz
>> from the PRS45A. The 1PPS from my homegrown unit is being used to trigger
>> the 5335A which is measuring the time interval. I could switch the trigger
>> to the KS, but I don't think that would change anything, since it's the
>> phase between two 10MHz signals that's being measured. Or do I
>> misunderstand how the 5335A triggering works for TI measurements? I can
>> post the setup commands for the HPIB if wanted, or even my somewhat
>> convoluted logging program.
>>
>> http://evoria.net/AE6RV/KS/fll.png
>>
>> Bob - AE6RV
>>
>> _______________________________________________
>> 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.
