Common Major Alarms; Alarm Masks - Radyne DMD20 Installation And Operation Manual

Maintenance and Troubleshooting
E1 FAS (E1 Frame
Acquisition Sync)
E1 MFAS (E1 Multi-
Frame Acquisition
Sync)

6.1.1.6 Common Major Alarms

Alarm
+5 Power
+12 Power
-12 Power
TxuProc (Transmit
Major Alarm)
M&C uProc (M&C
Microprocessor)
Battery
RAM/ROM

6.1.2 Alarm Masks

The DMD20 performs a high degree of self-monitoring and fault isolation. The alarms for these
faults are separated into the following three categories:
Active Alarms
Common Equipment Alarms
Backward Alarms
A feature exists that allows the user to 'Mask' out certain alarms as explained below. Alarms that
are recorded in the event buffer are the same as the alarm buffer.
Masking alarms may cause undesirable modem performance.
6-6
An E1 FAS Fault occurred. Valid
in PCM-30, or PCM-30C, PCM-
31, or PCM -31C Modes.
An E1 MFAS Fault occurred.
Valid in PCM -30, or PCM-30C,
PCM-31, or PCM-31C Modes.
Possible Cause
The +5 Volt power supply voltage
is out of range.
The +12 Volt power supply
voltage out of range.
The -12 Volt power supply voltage
out of range.
There is a Tx Processor Circuit
failure.
There is an M&C Microprocessor
hardware failure.
The internal clock battery is low.
There is an M&C Memory fault.
DMD20 Universal Satellite Modem
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Action
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
Call the Radyne ComStream
Customer Service Center.
The Modem may need to be
replaced.
The Modem may need to be
replaced.
Call the Radyne ComStream
Customer Service Center.
The Modem may need to be
replaced.
TM103 - Rev. 1.1