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GE Multilin C30 Controller System 3-23

3 HARDWARE 3.2 WIRING

3.2.9 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 C30 operates an internal oscillator with 1

µs resolution and accuracy. The IRIG time code formats are serial, width-modulated codes that can be either DC level

shifted or amplitude modulated (AM). Third party equipment is available for generating the IRIG-B signal; this equipment

can use a GPS satellite system to obtain the time reference so that devices at different geographic locations can be syn-

chronized.

Figure 3–23: OPTIONS FOR THE IRIG-B CONNECTION

Using an amplitude modulated receiver causes errors up to 1 ms in event time-stamping.

UR-series device

BNC (in)

Receiver

RG58/59 coaxial cable

GPS satellite system

GPS connection

IRIG-B (–)

827756A8.CDR

IRIG-B

time code generator

(DC-shift or

amplitude modulated

signal can be used)

IRIG-B (+)