Where:
Leap Second Sign:
01=Positive
FF=Negative
00=No leap second
Leap Second Month:
00=None scheduled
03=March
06=June
09=September
0C=December
Leap Second Zone:
0=Out of zone
1=Within zone
Zone is 15 minutes before to 15 minutes after a leap second.
GPS Week:
Up to FFFF
GPS Second:
Second of week 000000 up to 093A7F (604799 decimal)
GPS to UTC offset:
2’s complement binary signed integer, seconds
Checksum:
Sum of all bytes up to and including the checksum (sum includes the AAAA
start identifier but excludes the 9999 end identifier)
580 SecureSync 2400 User Manual
APPENDIX
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