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1 lcd front panel display, 2 cursor control arrow keys, 3 numeric keypad – Comtech EF Data QAM256 User Manual

Page 18

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User Interfaces

QAM256 Digital Video Modulator and Upconverter

4-2

TM077 - Rev. 4.0

4.1.1 LCD Front Panel 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 Arrow Keys


A set of ‘Arrow’ or ‘Cursor’ keys (

↑), (↓), (→), (←), is used to navigate the parameter currently

being monitored or controlled. Table 4-2 describes the functions available at the Front Panel.

4.1.3 Numeric Keypad


A 10 Key Numeric Keypad with 2 additional keys for the ‘Enter’ and ‘Clear’ function allows the
entry of data into the system. Table 4-2 describes the 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