Comtech EF Data DD240XR Rev Е - Manual (Page 23)

DD240XR High-Speed Digital Demodulator User Interfaces
MN-DD240XR – Rev. E 4-3
4.1.4 Front Panel LED Indicators
Eight LEDs on the DD240XR Front Panel (Refer to Table 4-3) indicate the status of the
DD240XRs operation. The LED colors maintain a consistent meaning. Green signifies that the
indication is appropriate for normal operation. Yellow means that there is a condition not proper
for normal operation, and Red indicates a fault condition that will result in lost communications.
Table 4-3.
LED Color Function
Carrier Lock Green Indicates the DD240XR Demodulator and Decoder are
locked.
Major Alarm Red Indicates that the receive direction has failed, losing traffic.
Minor Alarm Yellow Indicates a receive warning condition exists.
Test Mode Yellow Indicates the demodulator is involved in current test mode
activity.
Power Green Indicates the DD240XR unit is currently powered up.
Fault Red Indicates a common fault exists such as power out of spec.
Event Yellow Indicates that the events have been logged into the event
buffer.
Remote Green Indicates that the unit is set to respond to the remote control
or terminal input.
4.1.5 Parameter Setup
The four arrow keys (
↑), (↓), (→), (←), to the right of the LCD display are used to navigate the
menu tree and select the parameter to be set. After arriving at a parameter that needs to be
modified, depress <ENTER>. The first space of the modifiable parameter highlights (blinks) and
is ready for a new parameter to be entered. After entering the new parameter using the keypad
(Refer to Figure 4-3), depress <ENTER> to lock in the new parameter. If a change needs to be
made prior to pressing <ENTER>, depress <CLEAR> and the display defaults back to the original
parameter. Depress <ENTER> again and re-enter the new parameters followed by <ENTER>.
Following a valid input, the DD240XR will place the new setting into the nonvolatile SRAM making
it available immediately and available the next time the unit is powered-up.