F73 – Alarm Control / Status
F73 – Alarm Control / Status
Use function F73 to do the following:
• See the state of an indicator (“Locked/Unlocked” or “OK/Fault”)
• Enable or disable the alarm for each indicator
• 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 XL-GPS without options. The factory settings vary depending on the
options included at the XL-GPS at the time it ships from the factory (see * items in the table
that follows).
Update the alarm settings when adding or removing the expansion module from the XL-
GPS.
Indicator/Parameter Name Status
Factory Setting
(XL-GPS without expansion module)
Clock Status Locked/Unlocked Always Enabled
PLL Locked/Unlocked Alarm Enabled
* Low Phase Noise (LPN)
PLL Locked
Locked/Unlocked Alarm Disabled
GPS OK/Fault Alarm Enabled
IRIG fault OK/Fault Alarm Disabled
DAC OK/Fault Alarm Enabled
1st Time Lock OK/Fault Alarm Enabled
Time Error OK/Fault Alarm Enabled
Time Threshold (Range 0 to 99,999 nS) 0 nS
LED Blink n/a 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.
098-00116-000 Rev. A............................... Page 95 of 221
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