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.