[time-nuts] KS problem
bob at evoria.net
Wed Dec 10 18:24:06 EST 2014
I tried looking at the log in the Z38XX program (in wine), and I just get a blank. 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.
From: Bob Camp <kb8tq at n1k.org>
To: Bob Stewart <bob at evoria.net>; Discussion of precise time and frequency measurement <time-nuts at febo.com>
Sent: Wednesday, December 10, 2014 5:04 PM
Subject: Re: [time-nuts] KS problem
Have you dumped the log file from the KS and seen what it says about the tracking?
> On Dec 10, 2014, at 2:13 PM, Bob Stewart <bob at 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.
> Bob - AE6RV
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