C.F. Element # Digit # Function
57 8 Space
58 9 Space
59 PID P6 Position Identifier
60 10 Years Units Y1
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 description of the FAA mod-
ified 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 estim-
ate based on the time elapsed since loss of GPS lock. In addition, the Straight Binary
554 SecureSync 2400 User Manual
APPENDIX
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