Clear Alarm Latch - Symmetricom XLi User Manual

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• 1 - Last minute has 61 seconds (the clock is synchronized and the last minute of the day will have an
extra second)
• 2 - Last-minute has 59 seconds (the clock is synchronized and the last minute of the day will lose
1
one second)
Note: When using F73 in the front panel/display interface, the NTP indicator is only present if the NTP
option is installed. Otherwise, this indicator is hidden.

Clear Alarm Latch

Clear Alarm Latch does not report any errors.
Each F73 indicator has an Alarm Latch that is raised by a "Fault" or "Unlocked" condition. When the
indicator returns to a "Locked" or "OK" state, the alarm latch remains raised. This is useful for identifying
and troubleshooting transient alarms.
The operator typically decides to clear the alarm latch after attempting to fix the cause of some transient
alarm so that new transient faults can be identified after they occur.
Note: An indicator must be enabled for the fault/unlock state to raise the latch state. If disabled, a fault or
unlocked state will not raise the corresponding latch.
The keyboard/display interface shows the Alarm Latch as an asterisk next to an indicator, as follows:
Keypad
Note:
The Alarm Latch asterisk is not the same as the "reference source unavailable" asterisk that can
sometimes be seen on the STATUS display.
Command Line
To see the fault status of the alarm indicators, enter the following command:
F73<CR>
XLi replies:
F73<S>S<STATUS><SOURCE><S><123456789ABCDEFGHIJ><CR><LF>
where:
= ASCII character F
F
= ASCII character 7
7
102
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GPS PRI OK
ALARM ENABLED
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XLi Time & Frequency System
XLi-man, Issue 8, 6/17/2008, Rev. H
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