7.1. AFNOR/IRIG-B NFS87500
The IRIG standard consists of a family of serial time codes whose formats contain up to 4
expressions of binary codes transmitting date and time information. There are 6 code formats
with different pulses. Among these 6 code formats, each signal is identified by digits that
describe its characteristics (transmission speed, modulation, carrier and coded expression.
IRIG-B is the most common in industrial equipment. It transmits information at 100 pulses
per second.
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