Comtech EF Data CDM-740 - Manual (Page 54)

CDM-740 Advanced Satellite Modem Revision 0
Front Panel Operation MN-CDM740
5–2
5.1.1 Front Panel LED Indicators
IMPORTANT
In general, the Alarm relay state will reflect 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 will only be activated if a Transmit Traffic Fault
exists – it does not reflect the state of the Tx carrier.
The function of the eight front panel LED indicators is as follows:
LED Condition
UNIT STATUS
Green No Unit Faults, or Traffic Faults
Amber No Unit Faults, but a Traffic Fault exists
Red A Unit Fault exists (Example: PSU fault)
TRANSMITTER ON
Green Transmitter is ON
Off Transmitter is OFF. May be forced OFF by a Fault or programmed OFF
Tx TRAFFIC
Green No Tx Traffic Faults (data, encoder, synthesizer and modulator all OK)
Off A Tx Traffic fault exists
ONLINE
Green The Unit is Online, and carrying traffic
Off The Unit is Offline (standby) – forced by externally connected 1:1 redundancy system
STORED EVENT
Amber
There is a Stored Event in the log, which can be viewed from the front panel, or retrieved
via the remote control interface
Off There are no Stored Events
Rx-1 TRAFFIC
Green No Rx-1 Traffic Faults (demod-1 and data are all are OK)
Off
An Rx-1 Traffic fault exists (the demod may still be OK)
Or Rx-1 is inactive and not enabled (programmed OFF)
Rx-2 TRAFFIC (Unused) (Unused)
TEST MODE
Amber A Test Mode is selected (Example: TX CW)
Off There is no currently selected Test Mode
5.1.2 Front Panel Keypad
IMPORTANT
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.
The function of the keypad is as follows:
◄ ► (Left, Right)
These arrows are used 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.
▲ ▼ (Up, Down)
These arrows are used primarily to change configuration data (numbers).
At times, they may also be used to move from one section to another.
ENTER This key is used to select a displayed function or to execute a modem configuration change.
CLEAR
This key is used to back out of a selection or to cancel a configuration change which has not been
executed using [ENTER]. Pressing [CLEAR] generally returns the display to the previous selection.