Technical Documentation
TX Matrix Alarm LEDs on the Craft Interface
Two large alarm LEDs are located at the left of the craft interface (see Figure 1). Both LEDs can be lit simultaneously.
- The circular red LED lights to indicate a critical condition that can result in a system shutdown.
- The triangular yellow LED lights to indicate a less severe condition that requires monitoring or maintenance.
Figure 1: Alarm LEDs on the Craft Interface
A condition that causes an LED to light also activates the corresponding alarm relay contact on the connector interface panel (TX-CIP). The LCD display on the craft interface reports the cause of the alarm.
Table 1 describes the alarm LEDs in more detail.
Table 1: Alarm LEDs
Shape | Color | State | Description |
|---|---|---|---|
 | Red | On steadily | Critical alarm LED—Indicates a critical condition that can cause the TX Matrix router to stop functioning. Possible causes include component removal, failure, or overheating. |
 | Yellow | On steadily | Warning alarm LED—Indicates a serious but nonfatal error condition, such as a maintenance alert or a significant increase in component temperature. |
