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.
Cheers,
Magnus
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