ANET1553 Users Manual
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4.7 IRIG- and Time Code Section
The main functions of the Time Code Processor (TCP) are:
a.
IRIG-B compatible Time Code Decoder function
b.
Time Code Encoder
– IRIG-B compatible Time Encoder function
4.7.1 Timecode Encoder/Decoder
The generated time code signal is an IRIG-B-122 compatible signal. The time code
information can be used for time-tagging and multi-channel synchronization.
On the ANET1553 a freewheeling IRIG function is implemented. If no external IRIG
signal is detected, the Time Code Processor (TCP) switches automatically to the
freewheeling operation mode. If an external IRIG-B signal is detected in freewheeling
mode, the Time Tag is automatically synchronized to this external IRIG-B signal.
The time tag on the board is generated in the format shown in Table 3-1 below.
Time Element
Number of bits
DAYS of year
9
HOURS of Day
5
MINUTES of Hour
6
SECONDS of Minute
6
MICROSECONDS of Second
20
Summary
46 (6 Bytes, stored in two 32bit words)
Table 4.7.1-1 Time Tag Format
