Comtech EF Data OM20 - Manual (Page 141)

OM20 Universal Outdoor Modem Maintenance and Troubleshooting
MN-OM20– Revision 5 7–3
7.2.1.2 Major Rx Alarms
Alarm Possible Cause
FPGA CFG Indicates a receive FPGA hardware failure.
DSP CFG Indicates a receive DSP failure.
SIGNAL LOCK Indicates that the demod is unable to lock to a signal.
FRAME LOCK Indicates that the FRMing Unit is unable to find the
expected framing pattern.
MULTIFOME LOCK Indicates that the FRMing Unit is unable to find the
expected framing pattern.
LB SYNTH PLL Indicates that the Rx L-Band Synthesizer is not locked. This
alarm will flash on during certain modem parameter
changes. A solid indication points toward a configuration
problem within the modem.
IF SYNTH PLL Indicates that the Rx IF Synthesizer is not locked. This
alarm will flash on during certain modem parameter
changes. A solid indication points toward a configuration
problem within the modem.
Ethernet WAN Indicates that the WAN Port is down.
7.2.1.3 Minor Tx Alarms
Alarm Possible Cause
TERR CLK ACT Indicates no Terrestrial Clock activity.
TERR DATA ACT Indicates no Tx Data activity.
TX TERR AIS Indicates that AIS has been detected in the Tx Data Stream.
DnI FRAME LOCK When running Drop Mode, indicates that the framing unit is
unable to find the exported terrestrial framing pattern.
DnI M-FRAME LOCK When running Drop Mode, indicates that the framing unit is
unable to find the exported terrestrial framing pattern.
TX DVB FRAME LOCK Indicates that the Tx Input Data Stream FRMing does not
match the user selected Tx Terr FRMing. Incorrect Tx Terr
FRMing selected. Incorrectly framed Tx Input Data Stream.
BUC CURRENT Indicates that current is either below or above the threshold
limits of the BUC, as specified by the modem. Only active
when voltage is enabled.
BUC VOLTAGE Indicates that the voltage is not functioning correctly when
voltage is enabled.