C.F. Element # Digit # Function
61 11 Years Units Y2
62 12 Years Units Y4
63 13 Years Units Y8
64 14 Space
65 15 Years Tens Y10
66 16 Years Tens Y20
67 17 Years Tens Y40
68 18 Years Tens Y80
69 PID P7 Position Identifier
70 19 Space
71 20 Space
72 21 Space
73 22 Space
74 23 Space
75 24 Space
76 25 Space
77 26 Space
78 27 Space
5.5.3.1 FAA IRIG B Code Description
SecureSync can be configured to provide IRIG timing, reflecting UTC or local
time, with or without daylight saving time corrections. Below is a detailed descrip-
tion of the FAA modified IRIG B code. The FAA modified the IRIG B code by
including satellite lock status and time error flags in the Control Function Field.
The error flags provide an inaccuracy estimate based on the time elapsed since
loss of GPS lock. In addition, the Straight Binary Seconds (SBS) data was
removed from the data stream. The SBS time is the number of seconds elapsed
since midnight.
596 SecureSync 2400 User Manual
APPENDIX
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