Table 6-1. Front Panel Led Indicators - Comtech EF Data CDM-600L Installation And Operation Manual

CDM-600L Satellite Modem
Front Panel Operation
If the user were to display the same screen for weeks at a time, the display could become
'burnt' with this image. To prevent this, the unit has a 'screen saver' feature which will
activate after 1 hour. The top line of the display will show the Circuit ID (which can be
entered by the user) and the bottom line will show the circuit Eb/No value (if the demod
is locked) followed by 'Press any key....'. The message moves from right to left across
the screen, then wraps around. Pressing any key will restore the previous screen.
The behavior of the front panel LEDs is described below in Table 6-1.
LED Color
Red
Unit
Orange
Status
Green
Transmit Green
Traffic
Off
Receive Green
Traffic
Off
Green
On line
Off
Orange
Stored Event
Off
Orange
Off
Remote
Flashing
Orange
EDMAC Mode
Off
Orange
Test Mode
Off
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.
IMPORTANT

Table 6-1. Front Panel LED Indicators

Condition
A Unit Fault exists (Example: PSU fault)
No Unit Faults, but a Traffic Fault exists
No Unit Faults, or Traffic Faults
No Tx Traffic Faults
A Tx Traffic fault exists OR the Tx Carrier is in OFF state
No Rx Traffic Faults (demod and Viterbi decoder are locked, everything is OK)
An Rx Traffic fault exists (the demod may still be OK)
The Unit is On Line, and carrying traffic
The Unit is Off Line (standby) - forced by externally connected 1:1 or 1:N
redundancy system
There is a Stored Event in the log, which can be viewed from the front panel, or
retrieved via the remote control interface
There are no Stored Events
The Unit is in Remote Mode - local monitoring is possible, but no local control
The Unit is in Local Mode - remote monitoring is possible, but no remote control
ODU control has been enabled, and there is a communications fault, or there is a
ODU status fault
Framing on, EDMAC on, and unit defined as Slave - local monitoring is possible,
but no local control
Either no EDMAC, EDMAC Master, or Transparent mode is selected
A Test Mode is selected (Example: IF Loopback)
There is no Test Mode currently selected
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MN/CDM600L.IOM