12713020-002-2 Revision D – April 2004 SSU-2000 User’s Guide 243
Alarm Messages
Table A-1. Clock Module Alarm Messages
Alarm
Description
Alarm
Number
Default
Alarm
Level
Status
Messages
Description/
Corrective Action
Status of
module-to- module
communication
0Minor
Communication OK
Communication
Bad
Unable to communicate
with other modules.
Re-seat modules.
Input reference
available status
1Minor
Ok
Invalid
Input reference is not
available. Perform the
following:
Check the Input
reference settings
Check the Input port’s
status
Check that the phase
value is valid
Ensure that the Input port
priority is set
Verify that the PQL value
is equal to or greater
than the clock PQL value
When the Input reference
recovers, the alarm clears.
Frequency mode
degradation
2Minor Ok
Holdover
Invalid reference input
causes Holdover. Verify
input setup.
Frequency control
parameters within
specification
3Major
Ok
Out of Range
The reference input
frequency is over the clock
pull-in range.
Output frequency
status within
specification
4Minor
Ok
Degraded
Output exceeded pull-in
range of oscillator. Select
new input reference.
Clock module
usable as the
output reference
5Minor
Ok
Invalid
Clock mode has warmed
up.
Status of the
numerically
controlled oscillator
phase lock loop
6Minor
Ok
Not Locked
Alarm clears within one
minute after module is
installed. If alarm persists,
re-seat modules.
Status of the local
oscillator phase
lock loop
7Minor
Ok
Not Locked
Alarm will clear within one
minute after module is
installed. If alarm persists,
re-seat module.
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