Keypad; Vacuum Fluorescent Display (Vfd) - Comtech EF Data MBT-5000A Installation And Operation Manual

5.1.3

Keypad

The keypad functions as follows:
Key
(Left, Right)
(Up, Down)
5.1.4

Vacuum Fluorescent Display (VFD)

The MBT-5000A features a VFD, which is an active display showing two lines of 24 characters
each. It produces a blue light, the brightness of which can be controlled by the user. Compared to
a Liquid Crystal Display (LCD), it provides superior viewing characteristics and does not suffer
problems of viewing angle or contrast.
On most menu screens, a flashing solid block cursor blinks at a once-per-second rate. This
indicates the currently selected item, digit, or field. Where it might obscure the item under edit
(e.g., a numeric field), the solid block cursor automatically changes to an underline cursor.
Front Panel Operation
The keypad has an auto-repeat feature. When you
hold down a key for more than one second, the
key action repeats, automatically, at the rate of 15
keystrokes per second. This is particularly useful
when editing numeric field with many digits, such
as frequency or data rate.
Description
Use this key to display the nested menu for a selected function, or to execute
(save) a configuration change.
Use this key to cancel a configuration change that has not been executed
using ENTER. Press CLEAR to return to the previous menu screen.
Use these keys to navigate between available selections, or to move the
cursor position, on any menu screen.
Use these keys primarily to change the alphanumeric selection (i.e., numbers
for configuration data, letters for text strings) at the current cursor position, or
to scroll through pre-defined parameter settings that the MBT-5000A may
provide at the current cursor position.
MBT-5000A L-Band Up/Down Converter System
5–4
Revision 1
MN-MBT-5000A