[time-nuts] Z3801A leap second bug coming up

Tom Van Baak tvb at leapsecond.com
Fri Sep 30 20:07:46 EDT 2005


> Tim,
> 
> I'll be logging a 58503B and a Z3801A tomorrow
> just to check. Please do the same so we can
> compare notes.
> 
> As I recall it self-corrects the prediction within a
> second and there is no error in either the 1 PPS
> or the 10 MHz outputs. There is no problem with
> any other GPSDO; just the old Oncore based
> SmartClocks.
> 
> /tvb

My Z3801A did not have the problem (perhaps
because I turned it on this morning). How did
your Z3801A do?

Here's the 58503B log. A bogus leap second at
the top of the hour (+23,+59,+60) and then it
corrects itself as expected. 1PPS and 10 MHz
are fine. The HP58503B VFD display showed
23:59:60 also (did not have a camera ready).

2005-09-30 23:59:58.750 scpi > ptim:tcod?
2005-09-30 23:59:59.350 T22005093023596030+0040
2005-09-30 23:59:59.350 scpi > ptim:date?
2005-09-30 23:59:59.350 +2005,+9,+30
2005-09-30 23:59:59.350 scpi > ptim:time?
2005-09-30 23:59:59.410 +23,+59,+59
2005-09-30 23:59:59.410 scpi > ptim:leap:stat?
2005-09-30 23:59:59.520 1
2005-09-30 23:59:59.520 scpi > ptim:leap:dur?
2005-09-30 23:59:59.570 +61
2005-09-30 23:59:59.570 scpi > ptim:leap:acc?
2005-09-30 23:59:59.630 +13
2005-09-30 23:59:59.630 scpi > ptim:leap:date?
2005-09-30 23:59:59.740 +2005,+9,+30
2005-09-30 23:59:59.740 scpi > *cls
2005-09-30 23:59:59.740 scpi > ptim:tcod?

2005-10-01 00:00:00.340 T22005100100000030+001D
2005-10-01 00:00:00.340 scpi > ptim:date?
2005-10-01 00:00:00.340 +2005,+9,+30
2005-10-01 00:00:00.340 scpi > ptim:time?
2005-10-01 00:00:00.400 +23,+59,+60
2005-10-01 00:00:00.400 scpi > ptim:leap:stat?
2005-10-01 00:00:00.510 1
2005-10-01 00:00:00.510 scpi > ptim:leap:dur?
2005-10-01 00:00:00.560 +61
2005-10-01 00:00:00.560 scpi > ptim:leap:acc?
2005-10-01 00:00:00.620 +13
2005-10-01 00:00:00.620 scpi > ptim:leap:date?
2005-10-01 00:00:00.730 +2005,+9,+30
2005-10-01 00:00:00.730 scpi > *cls
2005-10-01 00:00:00.780 scpi > ptim:tcod?

2005-10-01 00:00:01.330 T2200510010000013000023
2005-10-01 00:00:01.330 scpi > ptim:date?
2005-10-01 00:00:01.330 +2005,+10,+1
2005-10-01 00:00:01.330 scpi > ptim:time?
2005-10-01 00:00:01.440 +0,+0,+0
2005-10-01 00:00:01.440 scpi > ptim:leap:stat?
2005-10-01 00:00:01.490 0
2005-10-01 00:00:01.490 scpi > ptim:leap:dur?
2005-10-01 00:00:01.550 E-230> ptim:leap:acc?
2005-10-01 00:00:01.600 +14
2005-10-01 00:00:01.600 E-230> ptim:leap:date?
2005-10-01 00:00:01.710 E-230> *cls
2005-10-01 00:00:01.770 scpi > ptim:tcod?

2005-10-01 00:00:02.320 T2200510010000023000024
2005-10-01 00:00:02.320 scpi > ptim:date?
2005-10-01 00:00:02.320 +2005,+10,+1
2005-10-01 00:00:02.320 scpi > ptim:time?
2005-10-01 00:00:02.430 +0,+0,+1

/tvb






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