GE L90 Instruction Manual page 116

PILOT CHANNEL COMMUNICATIONS CHAPTER 3: INSTALLATION
Figure 3-53: C37.94SM timing selection switch setting
3
Modules shipped since January 2012 have status LEDs that indicate the status of the DIP switches, as shown in the
following figure.
Figure 3-54: Status LEDs
The clock configuration LED status is as follows:
• Flashing green — loop timing mode while receiving a valid data packet
3-48 L90 LINE CURRENT DIFFERENTIAL SYSTEM – INSTRUCTION MANUAL