GE Multilin L90 Line Current Differential System 3-393 HARDWARE 3.3 PILOT CHANNEL COMMUNICATIONS3Modules shipped from January 2012 have status LEDs that indicate the status of the DIP switches, as shown in the follow-ing figure.Figure 3–43: STATUS LEDSThe clock configuration LED status is as follows:• Flashing green — loop timing mode while receiving a valid data packet• Flashing yellow — internal mode while receiving a valid data packet• Solid red — (switch to) internal timing mode while not receiving a valid data packetThe link/activity LED status is as follows:• Flashing green — FPGA is receiving a valid data packet• Solid yellow — FPGA is receiving a "yellow bit" and remains yellow for each "yellow bit"• Solid red — FPGA is not receiving a valid packet or the packet received is invalid
