On 6/11/2011 2:47 PM, Magnus Danielson wrote: > On 06/11/2011 02:11 PM, Ron Hahn (EI2JP) wrote: >> On 6/7/2011 10:40 PM, cook michael wrote: >>> Le 07/06/2011 21:15, [email protected] a écrit : >>>> I have an HP 58503A. It has an "Option H14,H19" sticker on the >>>> back. The >>>> circuit board has "58503-60001 Rev C" stamped on it. It has been >>>> running >>>> continuously and locked to GPS for a few days, and it knows the >>>> correct >>>> number of seconds between GPS and UTC. >>>> >>>> The unit displays GPS time, without the leap seconds correction. The >>>> front-panel display says "GPS xx:yy:zz", and ":system:status?" says >>>> "GPS >>>> 1PPS Synchronized to GPS Time", not "to UTC" as the manual shows. >>>> >>>> I'd be much obliged if anyone could tell me how to get the unit >>>> to display UTC instead of GPS time. >>> I think these use a similar command set to the Z3801A >>> try >>> :diag:gps:utc? should show 0 if the unit is in GPS, >>> 1 if UTC >>> if that gives coherent results, try >>> :diag:gps:utc 1 >>> to force the mode >> Colleagues, >> >> For someone who is not understanding these modes, can you explain what >> is this difference between UTC and GPS time? I have a HP Z3801A which I >> have been using for some years. Do I need to change this to UTC time? > > If you only wish a 10 MHz and PPS, no. GPS time will do just as well. > If you also want UTC time for NTP server for instance, then you do > want either to use the UTC mode or let the server know it runs on GPS > time and compensate itself. > Magnus,
I am interested in UTC time for weather satellite reception, synchronising via NTP. I tried the GPSCON program for the Z3801A but could never get it to broadcast ntp information on my LAN. Recently, I have purchased some Sure GPS boards from Sure Electronics (http://www.sureelectronics.net/goods.php?id=99). David Taylor has a great page on this at http://satsignal.eu/ntp/Sure-GPS.htm ... but now I am thinking his time is maybe always 15 seconds off, yes?? R _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
