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User Interfaces
4.1.1 Front Panel LCD Display
The Front Panel display is a 2 line by 16-character LCD display. The display is lighted and the
brightness can be set to increase when the Front Panel is currently in use. The LCD display
automatically dims after a period of inactivity. The display has two distinct areas showing current
information. The upper area shows the current parameter being monitored, such as 'Frequency'
or 'Data Rate'. The lower line shows the current value of that parameter. The LCD display is a
single entry window into the large matrix of parameters that can be monitored and set from the
Front Panel.
4.1.2 Front Panel LED Indicators
Eight LEDs on the DMD2401 LB/ST Front Panel (Refer to Table 4-2) indicate the status of
DMD2401 LB/ST operation. The LED colors maintain a consistent meaning. Green signifies
that the indication is appropriate for normal operation, Yellow means that there is a condition not
proper for normal operation, and Red indicates a fault condition that will result in lost
communications.
LED
Power
Fault
Event
Remote
Transmit On
Major Alarm
Minor Alarm
Test Mode
Signal Lock
Major Alarm
Minor Alarm
Test Mode
4-2
DMD2401 LB/ST L-Band Satellite Modem and ODU Driver
Table 4-2.
Color
Modem LED Indicators
Green
Indicates that the unit is turned on.
Red
Indicates a hardware fault for the unit.
Yellow
Indicates that a condition or event has occurred that the
modem has stored in memory. The events may be viewed
from the Front Panel or in the Terminal Mode.
Green
Indicates that the unit is set to respond to the remote control
input.
Modulator LED Indicators
Green
Indicates that the Transmit Output is currently active.
Red
Indicates that the Transmit Direction has failed, losing
traffic.
Yellow
Indicates that a warning condition exists.
Yellow
Indicates that the modulator is involved in a current Test
Mode activity.
Demodulator LED Indicators
Green
Indicates that the receiver locked to an incoming signal,
including FEC Sync.
Red
Indicates that the Receive Direction has failed, losing traffic.
Yellow
Indicates that a Receive Warning Condition exists.
Yellow
Indicates that the receiver is involved in a current Test
Mode activity.
Function
TM075 – Rev. 1.3
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