GE Multilin F35 Multiple Feeder Protection System 3-253 HARDWARE 3.2 WIRING33.2.10 IRIG-BIRIG-B is a standard time code format that allows stamping of events to be synchronized among connected devices. TheIRIG-B code allows time accuracies of up to 100 ns. Using the IRIG-B input, the F35 operates an internal oscillator with 1μs resolution and accuracy. The IRIG time code formats are serial, width-modulated codes that can be either DC levelshifted or amplitude modulated (AM). Third party equipment is available for generating the IRIG-B signal; this equipmentcan use a GPS satellite system to obtain the time reference so that devices at different geographic locations can be syn-chronized.Figure 3–25: OPTIONS FOR THE IRIG-B CONNECTIONUsing an amplitude modulated receiver causes errors up to 1 ms in event time-stamping.UR-series deviceBNC (in)ReceiverRG58/59 coaxial cableGPS satellite systemGPS connectionIRIG-B (–)4A+827756A8.CDRIRIG-Btime code generator(DC-shift oramplitude modulatedsignal can be used)4B IRIG-B (+)UR-series deviceBNC (in)ReceiverTwisted-pair cableGPS satellite systemGPS connectionIRIG-B (–)4A+IRIG-Btime code generator(DC-shift oramplitude modulatedsignal can be used)4B IRIG-B (+)NOTE
