Rev. 1
3–1
3
Chapter 3.
ODU OPERATION
3.1
Front Panel ODU Operation
The user can fully control and monitor the operation of Comtech EFData’s ODU from the
front panel, using the keypad and display of either a CDM550 or CDM550T modem.
Nested menus display all available options and prompt the user for required actions.
The display has two lines each of 24 characters. On most menu screens, a flashing
solid
block cursor
blinks once per second to indicate the currently selected item, digit, or field.
Where this solid block cursor would obscure the item being edited (for example, a
numeric field) the cursor will automatically change to an
underline cursor
.
The keypad has six keys, the functions of which are described below:
RIGHT ARROW
Moves the cursor to the right, when it is displayed
LEFT ARROW
Moves the cursor to the left, when it is displayed
UP ARROW
Used for editing the value at the current cursor position, if appropriate. If this is a numeric field,
this will increment the value.
DOWN ARROW
Used for editing the value at the current cursor position, if appropriate. If this is a numeric field,
this will decrement the value.
ENTER (ENT)
Used to accept an edited entry. Most menus prompt the user to press this key, by displaying the
text
(PRESS ENTER)
,
(ENTER)
or
(ENT)
. This results in the entry being accepted, and the user
is then returned to the previous menu.
CLEAR (CLR)
Used to escape from the current operation and return to the previous menu.
IMPORTANT NOTE
: The keypad has an
auto-repeat
feature. If a key is held down for
more than 1 second, the key action will repeat, automatically, at the rate of 15 keystrokes
per second. This is particularly useful when editing numeric fields, with many digits,
such as frequency or data rate.
