Led Indicators - Comtech EF Data CDM-425 Installation And Operation Manual

6.1.1

LED Indicators

The front panel LED indicators function as follows:
LED
Tx (Transmit)
TRAFFIC
Tx (Transmit)
Carrier
Rx (Receive)
TRAFFIC
DEMOD
LOCK
CnC ACTIVE
CnC LOCK
TIMED
FEATURE
Orange
Front Panel Operation
State
Green No Tx Traffic faults
A Tx Traffic fault exists (this is independent of the Transmit Carrier state – see TX
Off
Carrier LED)
Tx Carrier is ON (reflects the true state of the Tx carrier, regardless of Tx Traffic
Green
state)
Off Tx Carrier is OFF
No Rx Traffic faults (Demod/FEC decoder are locked, valid frame sync, if applicable,
Green
and no other Rx traffic alarms)
An Rx Traffic fault exists (frame sync alarm, etc - the demod may still be OK – see
Off
Demod Lock LED)
Green The demodulator and FEC decoder are locked
Off The demodulator and/or FEC decoder are not locked
Green CnC Mode is active
Off
CnC Mode is not active
Green
CnC Mode is active and the CnC algorithm has converged and locked
Off
If CnC Mode is active, the CnC algorithm has not converged and locked
Demo Mode is active or Time Limited CnC is active with > 15 days left before
Green
expiration or Fractional CnC is active, but unit is offline
Red
Time Limited CnC or Fractional CnC allowed time has expired
Fractional CnC is active, unit is online with < 15 days left before expiration
Off No time limited feature enabled. (will also turn off after Demo Mode time has expired)
In general, the Alarm relay state reflects the state of
the Front Panel LEDs. For example, if the Unit
Status LED is red, the Unit Alarm relay is active, etc.
The sole exception is the Transmit Traffic relay – it
does not reflect the state of the Tx carrier; it
activates only if a Transmit Traffic Fault exists.
Function
6–2
CDM-425 Advanced Satellite Modem
MN-CDM-425
Revision 0