Led Indicators - Comtech EF Data CDM-750 Installation And Operation Manual

CDM-750 Advanced High-Speed Trunking Modem
Front Panel Operation

5.1.1 LED Indicators

The function of the eight front panel LED indicators is as follows:
LED
UNIT STATUS
Tx
TRAFFIC
Rx TRAFFIC
ONLINE
STORED EVENT
TRANSMITTER ON
REMOTE
TEST MODE
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 activates
only if a Transmit Traffic Fault exists – it does not reflect
the state of the Tx carrier.
Indication Description
Green No Unit Faults, or Traffic (Tx or Rx) Faults
Amber A Unit, Tx, or Rx Alarm exits
Red A Unit, Tx or Rx Fault exists (Example: PSU fault)
Green The Tx Traffic path hardware and firmware are not faulted
Off The Tx Traffic path hardware and/or firmware are faulted
Tx Traffic is passing normally (demod and decoder are locked, everything is
Green
OK)
An Rx Traffic fault exists (the demod may still be OK)
Off NOTE: By convention demodulator unlock is a fault – even though it is likely
due to a missing carrier
Green The Unit is online, and carrying traffic
The Unit is offline (standby) – forced by externally connected 1:1 or 1:N
Off
redundancy system
There is a Stored Event in the log, which can be viewed from the front panel, or
Amber
retrieved via the remote control interface
Off There are no Stored Events
Green The Tx IF is ON.
Off The Tx IF is OFF.
The Unit is in Remote Mode – Remote monitoring and control is available.
Amber
Local monitoring and control is always available.
The Unit is in Local Mode – remote monitoring is possible, but remote control is
Off
not available.
Amber A Test Mode is selected (Example: IF Loopback)
Off There is no Test Mode currently selected
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Revision 2
MN-CDM750