On 2011-12-08, Mark C. Stephens <[email protected]> wrote: > Oh no I am quite happy with my hp3325A ;) > > > Well Okay, after a slight detour trying to get ilo100 to work, I loaded > centos 6.0 x64 on the DL165 G2 (computer) and found it has 3.3V PCI slots. So > none of my Serial I/O cards fit, being 5V. I have seen people take a dremel > to them to cut a 3.3V notch, but I am not a 100% sure this works. > > Centos 6.0 is really impressive I have to say. Also the PPS kernel module is > already built and installed, just need to load it. > > So the plan now is to connect a HP58534A GPS Timing Antenna to the only > serial port and compare the difference. > > On a windows box with the same antenna, I get offset of 0.010 and jitter > 0.001 off the PPS, and ~0.020 offset on the NMEA. > I think I will try to split the output of the GPS timing antenna into both > the windows and Linux boxen to compare accuracy on the different O/S's.
Not sure what you mean when you say you get offset of .010 (I assume the units a ms, not sec) Ie, what are you using to determine the offset? For nmea and offset of .02 sec is not unreasonable, so maybe you are >From PPS you should get offsets at the few microsecond level (.000002 sec) on Linux. > > I'll let you know how it goes! > > > Mark > > > -----Original Message----- > From: Rick Jones [mailto:[email protected]] > Sent: Thursday, 8 December 2011 12:16 PM > To: [email protected] > Subject: Re: New ntp Server > > unruh <[email protected]> wrote: >> Nothing except that he wrote down an incomprehensible line of numbers >> and expected people to know that was a computer, rather than a >> printer, or an atomic clock. > > You were expecting maybe an HP 4972A?-) (10 Mbit/s Ethernet network analyzer > from *many* years ago) or perhaps an HP P/N 19511-80014?-) > > rick jones > -- > The glass is neither half-empty nor half-full. The glass has a leak. > The real question is "Can it be patched?" > these opinions are mine, all mine; HP might not want them anyway... :) feel > free to post, OR email to rick.jones2 in hp.com but NOT BOTH... _______________________________________________ questions mailing list [email protected] http://lists.ntp.org/listinfo/questions
