70 XLi IEEE 1588 Clock
997-01510-03, Rev. C, 12/12/2006
SSSSSSSSSSSS SSSSSSSSSS SSSSSSS S SSS S SSSSS S
1
• See the state of the Alarm Latch for each indicator
• Clear the Alarm Latch for all indicators
• Enable or disable blinking of the Alarm Status LED on the front panel while it is green or amber
• Set the values for Time Threshold, Timeout Delay, and Power-On Alarm Suppress
The following table summarizes F73’s alarm indicators and parameters, as well as the factory settings
for an XLi with one GPS C/A receiver card. The factory settings vary depending on the options included
at the XLi at the time it ships from the factory. For example, for an XLi with an GPS receiver, the GPS
Primary Receiver indicator setting would be Alarm Enabled.
Update the alarm settings when adding or removing option cards from the XLi.
Note: The Rubidium Oscillator and NTP option are currently unavailable for the standard XLi IEEE 1588
clock.
Indicator/Parameter Name Status Factory Setting
(for XLi without option cards)
Clock Status Locked/Unlocked Always Enabled
PLL Locked Locked/Unlocked Alarm Enabled
Low Phase Noise (LPN) PLL Locked Locked/Unlocked Alarm Enabled
GPS Primary Receiver OK/Fault Alarm Enabled
GPS Secondary Receiver OK/Fault Alarm Disabled
IRIG Fault OK/Fault Alarm Disabled
Aux Ref Fault OK/Fault Alarm Disabled
Primary Power OK/Fault Alarm Enabled
Secondary Power OK/Fault Alarm Disabled
Rubidium oscillator
(XLi w. optional Rubidium oscillator) OK/Fault Alarm Disa ble d
DAC OK/Fault Alarm Disabled
First Time Lock OK/Fault Alarm Enabled
Time Error OK/Fault Alarm Enabled
Time Threshold (Range 0 to 99,999 ns) 0000 ns
Alarm LED Blink n/a Blink Enabled
Timeout OK/Fault Alarm Enabled
Timeout Delay (Range 0 to 86,400 sec.) 300 sec.
Power-On Alarm Suppress (Range 0 to 86,400 sec.) 300 sec.
NTP Fault
(XLi w. NTP option) OK/Fault Alarm Disa ble d
Clear Alarm Latch Yes/No No