Comtech EF Data DMD-2050E - Manual (Page 171)

DMD2050E Univeral Satellite Modem Maintenance and Troubleshooting
MN-DMD2050E Revision 2 6–9
Alarms are grouped into transmit and receive alarms. Transmit and receive alarms are completely
independent of each other.
6.4.2 Common Equipment Alarms
Common equipment alarms occur when the unit has problems that affect both transmit and
receive operations. Most common equipment alarms occur when there is a hardware failure in
the unit, such as a malfunctioning power supply.
External reference and external clock alarms occur when a unit has a configuration problem, not
a hardware failure.
6.4.3 Latched Alarms
Latched alarms are used for intermittent failures. If a fault occurs, the fault indication is “latched”
even if the alarm goes away.
After the unit is configured and operating correctly, clear any latched alarms.
CLEAR LATCHED ((ENTER)) Press ENTER to reset the latched alarms.
These alarms are latched to catch intermittent failures:
TX MAJOR (menu) {Pass/Fail} TX MINOR (menu) {Pass/Fail}
FPGA CFG TERR CLK ACT
DSP CFG TERR DATA ACT
SCT CLOCK PLL TX TERR AIS
SYM CLOCK PLL DnI FRAME LOCK
LB SYNTH PLL DnI M-FRAME LOCK
IF SYNTH PLL DROP CRC
ETHERNET WAN TX DVB FRM LOCK
TRANSEC NOT RDY TX CL,SRC FALLBK
TPC CONFLICT CHK
RX MAJOR (menu) {Pass/Fail} RX MINOR (menu) {Pass/Fail}
FPGA CFG BUFF UNDERFLOW
DSP CFG BUFF NEAR EMPTY
SIGNAL LOCK BUFF NEAR FULL
INPUT LVL THRESH BUFF OVERFLOW
FRAME LOCK RX DATA ACTIVITY