Capture of leapsecond on HP 58503A time and frequency reference receiver
This was a bit hit and miss. I sent 'SYSTEM:STATUS?' by hand, when I thought it
was the right time. I got lucky. There are a couple of outputs before the
leapsecond, and one or two after it.
I did an audio recording on my Virgin mobile phone. I'll upload that later,
after some sleep.
Dave
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status -------------------------------
SYNCHRONIZATION ............................................. [ Outputs Valid ]
SmartClock Mode ___________________________ Reference Outputs _______________
Locked to GPS TFOM 3 FFOM 0
Recovery 1PPS TI +8.7 ns relative to GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty ____________
Predict 11.1 us/initial 24 hrs
ACQUISITION ................................................ [ GPS 1PPS Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time _____ +1 leap second pending
PRN El Az SS PRN El Az UTC 23:56:00 31 Dec 2016
16 12 287 45 2 12 37 GPS 1PPS Synchronized to UTC
21 28 171 66 23 11 323 ANT DLY 0 ns
25 44 106 101 Position ________________________
26 40 290 123 MODE Hold
29 73 68 114
31 61 236 85 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m (MSL)
HEALTH MONITOR ......................................................... [ OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status -------------------------------
SYNCHRONIZATION ............................................. [ Outputs Valid ]
SmartClock Mode ___________________________ Reference Outputs _______________
Locked to GPS TFOM 3 FFOM 0
Recovery 1PPS TI +11.4 ns relative to GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty ____________
Predict 11.1 us/initial 24 hrs
ACQUISITION ................................................ [ GPS 1PPS Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time _____ +1 leap second pending
PRN El Az SS PRN El Az UTC 23:59:00 31 Dec 2016
16 13 288 37 2 11 37 GPS 1PPS Synchronized to UTC
21 29 171 95 23 11 322 ANT DLY 0 ns
25 42 107 110 Position ________________________
26 41 290 85 MODE Hold
29 72 67 120
31 61 234 101 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m (MSL)
HEALTH MONITOR ......................................................... [ OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status -------------------------------
SYNCHRONIZATION ............................................. [ Outputs Valid ]
SmartClock Mode ___________________________ Reference Outputs _______________
Locked to GPS TFOM 3 FFOM 0
Recovery 1PPS TI -3.3 ns relative to GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty ____________
Predict 11.1 us/initial 24 hrs
ACQUISITION ................................................ [ GPS 1PPS Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time _____ +1 leap second pending
PRN El Az SS PRN El Az UTC 23:59:60 31 Dec 2016
16 14 288 51 2 11 37 GPS 1PPS Synchronized to UTC
21 30 171 54 23 11 322 ANT DLY 0 ns
25 42 107 95 Position ________________________
26 42 291 73 MODE Hold
29 72 66 124
31 60 233 120 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m (MSL)
HEALTH MONITOR ......................................................... [ OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status -------------------------------
SYNCHRONIZATION ............................................. [ Outputs Valid ]
SmartClock Mode ___________________________ Reference Outputs _______________
Locked to GPS TFOM 3 FFOM 0
Recovery 1PPS TI +3.2 ns relative to GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty ____________
Predict 11.1 us/initial 24 hrs
ACQUISITION ................................................ [ GPS 1PPS Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time ____________________________
PRN El Az SS PRN El Az UTC 00:00:15 01 Jan 2017
16 14 288 47 2 11 36 GPS 1PPS Synchronized to UTC
21 30 171 68 23 11 321 ANT DLY 0 ns
25 42 107 99 Position ________________________
26 42 291 70 MODE Hold
29 71 66 125
31 60 233 105 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m (MSL)
HEALTH MONITOR ......................................................... [ OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv: OK
scpi >
--
Dr. David Kirkby Ph.D CEng MIET
Kirkby Microwave Ltd
Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK.
Registered in England and Wales, company number 08914892.
http://www.kirkbymicrowave.co.uk/
Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please)
Reposting the output in a fixed width font. It looked fixed on my other
client.
I note the clock says "Time _____ +1 leap second pending" at 23:59:60,
which one can argue is wrong.
*Status reports a couple of times before the leap second. *
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status
SYNCHRONIZATION ............................................. [ Outputs
Valid ]
SmartClock Mode ___________________________ Reference Outputs
Locked to GPS TFOM 3 FFOM
0
Recovery 1PPS TI +8.7 ns relative to
GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty
Predict 11.1 us/initial 24
hrs
ACQUISITION ................................................ [ GPS 1PPS
Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time _____ +1 leap second
pending
PRN El Az SS PRN El Az UTC 23:56:00 31 Dec
2016
16 12 287 45 2 12 37 GPS 1PPS Synchronized to UTC
21 28 171 66 23 11 323 ANT DLY 0 ns
25 44 106 101 Position
26 40 290 123 MODE Hold
29 73 68 114
31 61 236 85 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m
(MSL)
HEALTH MONITOR ......................................................... [
OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv:
OK
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status
SYNCHRONIZATION ............................................. [ Outputs
Valid ]
SmartClock Mode ___________________________ Reference Outputs
Locked to GPS TFOM 3 FFOM
0
Recovery 1PPS TI +11.4 ns relative to
GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty
Predict 11.1 us/initial 24
hrs
ACQUISITION ................................................ [ GPS 1PPS
Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time _____ +1 leap second
pending
PRN El Az SS PRN El Az UTC 23:59:00 31 Dec
2016
16 13 288 37 2 11 37 GPS 1PPS Synchronized to UTC
21 29 171 95 23 11 322 ANT DLY 0 ns
25 42 107 110 Position
26 41 290 85 MODE Hold
29 72 67 120
31 61 234 101 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m
(MSL)
HEALTH MONITOR ......................................................... [
OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv:
OK
*Here's the actual leap second. *
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status
SYNCHRONIZATION ............................................. [ Outputs
Valid ]
SmartClock Mode ___________________________ Reference Outputs
Locked to GPS TFOM 3 FFOM
0
Recovery 1PPS TI -3.3 ns relative to
GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty
Predict 11.1 us/initial 24
hrs
ACQUISITION ................................................ [ GPS 1PPS
Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time _____ +1 leap second
pending
PRN El Az SS PRN El Az UTC 23:59:60 31 Dec
2016
16 14 288 51 2 11 37 GPS 1PPS Synchronized to UTC
21 30 171 54 23 11 322 ANT DLY 0 ns
25 42 107 95 Position
26 42 291 73 MODE Hold
29 72 66 124
31 60 233 120 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m
(MSL)
HEALTH MONITOR ......................................................... [
OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv:
OK
*Now one after the leap second. The notice about a leap second pending has
gone. *
scpi > SYSTEM:STATUS?
------------------------------- Receiver Status
SYNCHRONIZATION ............................................. [ Outputs
Valid ]
SmartClock Mode ___________________________ Reference Outputs
Locked to GPS TFOM 3 FFOM
0
Recovery 1PPS TI +3.2 ns relative to
GPS
Holdover HOLD THR 1.000 us
Power-up Holdover Uncertainty
Predict 11.1 us/initial 24
hrs
ACQUISITION ................................................ [ GPS 1PPS
Valid ]
Tracking: 6 ____ Not Tracking: 2 ________ Time
PRN El Az SS PRN El Az UTC 00:00:15 01 Jan
2017
16 14 288 47 2 11 36 GPS 1PPS Synchronized to UTC
21 30 171 68 23 11 321 ANT DLY 0 ns
25 42 107 99 Position
26 42 291 70 MODE Hold
29 71 66 125
31 60 233 105 LAT N 51:39:04.132
LON E 0:46:36.343
ELEV MASK 10 deg HGT +44.72 m
(MSL)
HEALTH MONITOR ......................................................... [
OK ]
Self Test: OK Int Pwr: OK Oven Pwr: OK OCXO: OK EFC: OK GPS Rcv:
OK
scpi >