Symmetricom XL-GPS User Manual

5: Function Reference
* NTP OK/Fault Alarm Disabled
Clear Alarm Latch Yes/No No
See "Factory Default Jumper and Switch Settings for Options" on page 166
Alarms - General Information
With Alarm Disabled, an F73 indicator does not trigger and alarm when it enters an
Unlocked or Fault state.
With Alarm Enabled, an F73 indicator triggers an alarm when it enters an Unlocked or Fault
state, and the following events take place:
• The Alarm Status LED changes color from green to amber or red (See “Alarm Status
LED” on page37.)
• The ALARM output on the rear panel changes from low Z to high Z (impedance).
• If configured, SNMP sends a trap out over the network port. (See “C: SNMP” on
page183.)
The following items may delay an unlocked or fault state from triggering an alarm
immediately:
• Timeout and Timeout Delay postpone Time Error alarms for a user-configured
interval. See “Timeout and Timeout Delay” on page98.
• Power-on Alarm Suppress prevents alarms from being triggered for a user-
configured interval after the XL-GPS boots and starts. See “Power On Alarm
Suppress” on page98.
Alarm Definitions
Clock Status
Locked: The XL-GPS clock is locked to the GPS reference source and is operating within the
F73 Time Error Threshold.
Unlocked: Check the other alarm indicators to determine the cause of the problem.
PLL
Locked: The clock PLL is locked and operating nominally.
Unlocked: The clock PLL is malfunctioning. Return to Symmetricom for service. See “H:
Sales and Customer Assistance” on page204.
LPN PLL
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Symmetricom XL-GPS Specifications

General

Brand	Symmetricom
Model	XL-GPS
Category	Receiver
Language	English