Irig-B - GE B90 Instruction Manual

3 HARDWARE 3.2 WIRING

3.2.8 IRIG-B

IRIG-B is a standard time code format that allows stamping of events to be synchronized among connected devices. The
IRIG-B code allows time accuracies of up to 100 ns. Using the IRIG-B input, the B90 operates an internal oscillator with 1
µs resolution and accuracy. The IRIG time code formats are serial, width-modulated codes which can be either DC level
shifted or amplitude modulated (AM). Third party equipment is available for generating the IRIG-B signal; this equipment
may use a GPS satellite system to obtain the time reference so that devices at different geographic locations can also be
synchronized.
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Figure 3–22: OPTIONS FOR IRIG-B CONNECTION
GE Multilin B90 Low Impedance Bus Differential System 3-23