User Manual
ADCP-75-150 • Preliminary Issue A • March 2003 • Section 5: Maintenance
Page 5-5
©
2003,
ADC
Telecommunications,
Inc.
3 FAULT ISOLATION AND TROUBLESHOOTING
Alarm
information
may
be
accessed
and
faults
isolated
using
the
information
provided
by
the
unit
front
panel
LED
indicators,
the
DEMS
software
GUI
alarm
displays,
or
the
NOC-EMS
interface.
Because
the
alarm
information
provided
by
the
DEMS
GUI
and
the
NOC-EMS
interface
is
very
detailed,
refer
to
Table 5-4,
Table 5-5,
or
Table 5-6
to
determine
the
unit
LED
indicator
(Host
Unit,
Remote
Unit,
or
LPA)
that
corresponds
to
the
indicated
alarm.
Then
refer
to
Table 5-7,
Table 5-8,
or
Table 5-9
to
identify
the
problem,
check
out
the
possible
causes,
and
take
corrective
action.
Table 5-4. Host Unit Major and Minor Alarms
MAJOR ALARM LED INDICATOR MAJOR ALARM LED INDICATOR
Operating
Mode (Does
not
apply) Fwd
Synth
Lock HOST
UNIT
8
Volt HOST
UNIT RF
Mute (Does
not
apply)
Pri
No
Light (Not
implemented) Major
Extern
Output (Does
not
apply)
Pri
Fwd
Mux
Lock HOST
UNIT Companion
Lost PORT
1/PORT
2
Pri
Rev
Synth
Lock HOST
UNIT
MINOR ALARMS LED INDICATOR
Overdrive DRIVE Temperature HOST
UNIT
Unit
Mismatch HOST
UNIT Sec
No
Light (Does
not
apply)
Link
Alarm (Does
not
apply) Sec
Errors (Does
not
apply)
3.8
Volt HOST
UNIT Sec
Rev
Synth
Lock HOST
UNIT
Pri
Laser
Fail HOST
UNIT Underdrive DRIVE
Pri
Errors PORT
1/PORT
2Minor
Extern
Output (Does
not
apply)
Table 5-5. Remote Unit Major Alarms
MAJOR ALARM LED INDICATOR MAJOR ALARM LED INDICATOR
Operating
Mode (Does
not
apply) Battery
Vol ta ge ( Do es
not
apply)
3.8
Vo lt S T M P ri
Laser
Fail STM
Pri
Errors PORT
1/PORT
2Fwd
Synth
Lock STM
Reference
Synth
Lock STM System
VSWR VSWR
LPA
DC
Fail PA LPA
Low
Power PA
LPA
VSWR PA Unit
Mismatch STM
Link
Alarm (Does
not
apply) Converter STM
AC
Fail AC
POWER Pri
No
Light PORT
1/PORT
2
8
Vo lt S T M P ri
Rev
Synth
Lock STM
Pri
Rev
Mux
Lock STM LPA
Detect PA
RF
Mute (Does
not
apply) LPA
Over
Power PA
LPA
Loop
Failed PA Companion
Lost PORT
1/PORT
2
Major
Extern
Alarm
Inp (Does
not
apply) – –