Year information consists of the last two digits of the current year (i.e. 98, 99,
etc.). Elements 60 through 63 contain the binary equivalent of year units. Ele-
ments 65 through 68 contain the binary equivalent of tens of years. In keeping
with IRIG formats, the least significant bit occurs first.
Elements 80 through 97 are encoded with the Straight Binary Seconds (SBS)
time data. The SBS time data is incremented in 10-second steps and recycles
every 24 hours.
Pulse rates:
Element rate: 10 per second.
Position identifier rate: 1 per second.
Reference marker rate: 1 per 10 seconds.
Element identification: The "on time" reference point for all elements is the
pulse leading edge.
Index marker (Binary 0 or uncoded element): 20 millisecond duration.
Code digit (Binary 1): 50 millisecond duration.
Position identifier: 80 millisecond duration.
Reference marker: 80 millisecond duration, 1 per 10 seconds. The reference
marker appears as two consecutive position identifiers. The second pos-
ition identifier or reference marker is the on-time point for the succeeding
code word.
SecureSync 2400 User Manual 601
APPENDIX
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