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DM240XR High-Speed Digital Modulator User Interfaces

MN-DM240XR– Revision 13 4–2

Item Number Description Function

1 LCD Front Panel Display

Displays DM240XR Operating

parameters and Configuration data.

2 Cursor Control Arrows

Controls the up, down, right and left

motion of the cursor in the LCD

Display window (see Figure x-x).

3 Numeric Keypad

Allows entry of numeric data and Clear

and Enter function keys.

4 Operational Function LEDs

See Table 4-2 for a description of these

LED Indicators.

4.2.1 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.

4.2.2 Front Panel LED Indicators

Eight LEDs on the DM240 front panel (Refer to Table 4-2) indicate the status of the DM240’s

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.

Table 4-2.

LED

Color

Function

Transmit On

Green

Indicates the DM240 XRTransmitter is turned on.

Major Alarm

Red

Indicates that the transmit direction has failed, losing traffic.

Minor Alarm

Yellow

Indicates a transmit warning condition exists.

Test Mode

Yellow

Indicates the modulator is involved in a current test mode

activity.

Power

Green

Indicates the DM240XR unit is currently powered up.

Fault

Red

Indicates a common fault exists such as power out of spec.

Event

Yellow

Indicates that events have been logged into the event buffer.

Remote

Green

Indicates that the unit is set to respond to the remote control

or terminal input.

4.2.3 Front Panel Keypad

The front panel keypad consists of two areas: a 10-key numeric entry with 2 additional keys for

the ‘Enter’ and ‘Clear’ function. The second area is a set of ‘Arrow’ or ‘Cursor’ keys (

↑), (↓),

(

→), (←), used to navigate the parameter currently being monitored or controlled. Table 4-3

describes the key functions available at the front panel.

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