Spectracom NetClock 9489 - IRIG B Output

of the bit rate and a binary zero (0) having a positive pulse width equal to 0.2 of
the reciprocal of the bite rate.
NetClock can provide IRIG A, IRIG B, IRIG E and IRIG G code in amplitude modulated (AM) or
pulse width coded (TTL) formats. A signature control feature may be enabled for any IRIG out
put. Signature control removes the modulation code when a Time Sync Alarm is asserted.
5.5.3 IRIG B Output
The IRIG B Time Code description follows.
Figure 5-10: IRIG B time code description
The IRIG B code contains the Binary Coded Decimal (BCD) time of year, Control Function (CF)
field and the Straight Binary Seconds time of day. The following figure illustrates the IRIG B
418 NetClock User Reference Guide
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