Figure 7-2. Front Panel Keypad - Comtech EF Data CDM-710 Installation And Operation Manual

CDM-710/L Broadcast Satellite Modem
Front Panel Operation
TEST MODE
• Lights GREEN when a BERT (Bit Error Rate test) is active.
• Remains OFF when the unit is operating normally.
In general, the Alarm relay state reflects the state of the Front Panel
LEDs. For instance, if the Unit Status LED is red, the Unit Alarm relay
will be active, etc. The one exception is the Transmit Traffic relay; this
is activated only if a Transmit Traffic Fault exists – it does not reflect
the state of the Tx carrier.
Item 2 –The keypad comprises six individual keyswitches. Figure 7-2 shows the
initially-released version of the keypad (membrane switch) versus the current
production version.
Operation of the individual keys is as follows:
• Use the ENTER key to select a displayed function or to execute a unit
configuration change.
• Use the CLEAR key to back out of a selection or to cancel a configuration
change that has not been executed using ENTER. Pressing CLEAR
generally returns the display to the previous selection.
• Use the  (LEFT) and  (RIGHT) keys to move to the next selection or to
move the cursor functions. At times, they may also used to move from
one section to another.
• Use the  (UP) and  (DOWN) keys to change configuration data
(numbers). You may also use these keys to move from one section to
another.
The keys have a positive 'click' action that provides tactile feedback. ENTER data
via the keypad. Data, prompts, and messages appear on the Vacuum
Fluoresecent Display (VFD).

Figure 7-2. Front Panel Keypad

7–3
MN/CDM710.IOM
Revision 12