Irig E Output - Spectracom VelaSync 1232 User Manual

APPENDIX
C.F. Element # Digit #
70
71
72
73
74
75
76
77
78
5.3.4

IRIG E Output

The IRIG E
Functions. The figure IRIG E Time Code Description illustrates the IRIG E data struc-
ture. 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
Code Digit
Code Word
Binary 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 (CF) for the encoding of various control, identification, or other special
purpose functions. IRIG E has 45 Control Functions located between elements
230
Function
19 Space
20 Space
21 Space
22 Space
23 Space
24 Space
25 Space
26 Space
27 Space
code contains the Binary Coded Decimal (BCD) time of year and Control
frame: 10 seconds.
Weighting:
Binary Coded Decimal time of year.
Code world - 26 binary digits.
Tens of seconds, minutes, hours, and days.
Recycles yearly.
Structure: BCD word tens of seconds digits begin at index count 6.
Functions: IRIG formats reserve a set of elements known as Control
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