Orolia VersaSync

Figure 5-1: IRIG B time code description
The IRIG B code contains the Binary Coded Decimal (BCD) time of year, Control Function
(CF) field and the Straight Binary Seconds time of day. The following figure illustrates the
IRIG B data structure. The BCD time of year provides the day of the year, 1-366, and the
time of day including seconds. The hour of the day is expressed in 24 hour format. The
SBS time is the number of seconds elapsed since midnight. The Control Function field con-
tains year information and a time synchronization status bit.
1.
Time frame: 1.0 seconds.
2.
Code digit weighting:
A.
Binary Coded Decimal time-of-year.
Code word - 30 binary digits.
Seconds, minutes hours, and days.
Recycles yearly.
B.
Straight Binary Seconds time-of-day.
334 VersaSync User Manual
APPENDIX