Comtech EF Data MBT-4000B - Manual (Page 75)

A–1
Appendix A. FAULTS/EVENTS
A.1 LED Status Indicators
The MBT-4000B Multi-Band Transceiver System features two Light-Emitting Diode (LED)
indicators. As shown in Figure A-1, the LEDs are found on the top of the MBT-4000’s base
module, under a protective plate. To view the LEDs, loosen the thumbscrew that keeps the plate
in place, then swing the plate away to reveal the LED display window.
Figure A-1. MBT-4000B LED Indicators
The Unit 1 LED is for the installed BUC (Slot 1). The Unit 2 LED is operational when the presence
of an LNB is detected. Each LED provides the user with visual cues to the operational, online,
and offline status for the system.
A steadily-lit LED indicates that the specified unit is ONLINE. A blinking LED indicates that the
specified unit is OFFLINE. The user is presented with MBT-4000B system status as per the
following table:
UNIT STATUS LED COLOR UNIT STATE
ONLINE
GREEN No faults present; the unit is not muted.
YELLOW No faults present; the unit is muted.
RED The unit is faulted.
OFFLINE
GREEN (blinking) No faults present; the unit is not muted.
YELLOW (blinking) No faults present; the unit is muted.
RED (blinking) The unit is faulted.