Comtech EF Data DD240XR Rev Е - Manual (Page 22)

User Interfaces DD240XR High-Speed Digital Demodulator
4-2 MN-DD240XR – Rev. E
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 Cursor Control Arrows
The ‘Cursor’ or ‘Arrow’ Keys (
↑), (↓), (→), (←), are used to navigate the parameter currently being
monitored or controlled. Table 4-2 describes the key functions available at the Front Panel.
Table 4-2.
Edit Mode Key Functions (Front Panel Only)
Parameter
Type
0 – 9 ↑ ↓ ← → ‘Clear’ &
←
‘Clear’ &
→
Fixed Point
Decimal
Changes Digit Toggles ±
(If Signed)
Toggles ±
(If Signed)
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
Unsigned
Hexadecimal
Changes Digit Increments
Digit Value
Decrements
Digit Value
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
Enumerated N/A Previous
Value in
List
Next
Value in
List
N/A N/A N/A N/A
Date/ Time Changes Digit N/A N/A Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
IP Address Changes Digit Increments
Digit Value
Decrements
Digit Value
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
N/A N/A
Text Strings Changes
Character
Increments
Character
Value
Decrements
Character
Value
Moves
Cursor 1
Position
Left
Moves
Cursor 1
Position
Right
Clears to
Left of
Cursor
Inclusive
Clears to
Right of
Cursor
Inclusive
4.1.3 Front Panel Keypad
The Front Panel Keypad consists of a 10-key numeric entry with 2 additional keys for the ‘Enter’
and ‘Clear’ functions.