Local Problem-Solving; Front Panel Leds - GE MDS 4790 Series Installation & Operation Manual

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7.1 Local Problem-Solving

Front Panel LEDs

The first indication of a problem is usually an illuminated
on the front panel. In normal operation, only the green (
lit (and, in a master station configured for redundant operation, one of
the yellow LEDs).
STBY
In a redundant master station, the LEDs show the state of the A and B
transceiver boards. In a non-redundant master station, the LEDs show
the state of the A transceiver board.
Refer to Figure 33 and the text that follows for an explanation of the
LED indicators.
A
ACTIVE
B
ACTIVE
Figure 33. LED Indicators
Table 19. Explanation of Front Panel LEDs
LED Color Meaning When Lit
Name
ACTIVE Green Transceiver board (A or B) is the selected unit.
STBY Yellow Transceiver board (A or B) is currently in stand-by mode
(functional on master station configured for redundant
operation only).
ALARM Red A major or minor alarm event has occurred. Use the front
panel's Active Radio Status screen to list current alarm
events (see
RX ALR Red Difficulty receiving, possibly due to an antenna problem,
receiver fault, or other condition causing no or a weak
received signal level.
TX ALR Red Transmit circuitry fault.
I/O ALR
Red A data framing or parity error has occurred over the data
port.
MDS 4790/9790 Series I/O Guide
Invisible place holder
STBY ALARM RX ALR TX ALR I/O ALR
STBY ALARM RX ALR TX ALR I/O ALR
Page 77).
MDS 05-3438A01, Rev. F
LED
ALARM
) LED is
ACTIVE