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C.F. Element # Digit # Function

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

5.4.4 IRIG E Output

The IRIG E code contains the Binary Coded Decimal (BCD) time of year and Control Func-

tions. The figure IRIG E Time Code Description illustrates the IRIG E data structure. The

BCD time of year provides the day of year, 1-366, and time of day to tens of seconds. The

hour of the day is expressed in 24 hour format. The Control Function field includes a time

synchronization status bit, year information and SBS time of day.

Time frame: 10 seconds.

Code Digit Weighting:

Binary Coded Decimal time of year.

Code world - 26 binary digits.

Tens of seconds, minutes, hours, and days.

Recycles yearly.

Code Word Structure: BCD word tens of seconds digits begin at index count 6. Bin-

ary coded elements occur between position identifier elements P0 and P5 (3 for

seconds, 7 for minutes, 6 for hours, and 10 for days) until the code word is complete.

An index marker occurs between decimal digits in each group to provide separation

for visual resolution. Least significant digit occurs first.

Control Functions: IRIG formats reserve a set of elements known as Control Func-

tions (CF) for the encoding of various control, identification, or other special purpose

functions. IRIG E has 45 Control Functions located between elements 50 and 98.

VersaSync User Manual 337

APPENDIX

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