5: Function Reference
Locked: The DAC, which disciplines the clock oscillator to the reference source, is operating
nominally.
Unlocked: The DAC is operating out of specifications. Return to Symmetricom for service.
See “H: Sales and Customer Assistance” on page204.
1st Time Lock
Time Error and Time Threshold
Time Error issues an alarm when the worst case time error (“F13 – Time Error” on page67)
of the XL-GPS system clock exceeds the user-set Time Threshold.
Note: With Time Threshold set to zero, the unit applies a default value of 150 nS.
LED Blink
When LED Blink is enabled, the Alarm Status LED on the front panel blinks when it is green
or amber. The LED does not blink when it is red, even if LED Blink is enabled. Some users
disable LED Blink to ensure that the LED’s color (state) is displayed without interruption.
Timeout and Timeout Delay
Timeout and Timeout Delay can be used to prevent short-term Time Error faults from
triggering Time Error alarms.
Timeout Disabled: All Time Error faults trigger an alarm, regardless of duration.
Timeout Enabled: Only Time Error faults that last longer than the Timeout Delay (measured
in seconds) trigger an alarm. If a Time Error fault clears and returns to an OK state before the
Timeout Delay has elapsed, the ‘countdown’ stops and no alarms are triggered. All Time
Error faults start the Timeout Delay ‘countdown’ from the beginning (i.e., Timeout Delay
does not keep a countdown tally for multiple Time Error faults).
Power On Alarm Suppress
Power On Alarm Suppress prevents all F73 alarms from occurring for a specified interval
after the unit starts up. The factory default setting is 300 seconds (five minutes). When that
interval ends, current and new alarms are reported normally.
NTP
OK: NTS is operating nominally.
Fault: NTS is not operating correctly. Contact Symmetricom Customer service. See “H:
Sales and Customer Assistance” on page204.
Clear Alarm Latch
Page 98 of 221 .................................098-00116-000 Rev. A
To Next Page
Loading...
Need help?
General
