SSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSSS

The keyboard/display interface shows the Alarm Latch as an asterisk next to an indicator, as follows:

GPS PRI OK

ALARM ENABLED

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 setting is 300 seconds (five minutes). When that interval ends, current and new alarms are reported normally.

Clear Alarm Latch

Each indicator has an Alarm Latch. The Alarm Latch shows that indicator that has been in an alarm state, even if it presently reports as “Locked” or “OK”. The Alarm Latch is useful for finding transient alarms. Clear the alarm latch settings after troubleshooting or fixing the cause of an alarm so new alarms can be distinguished from previous ones.

Note that an alarm latch only records the occurrence of an alarm if it the indicator’s alarm is enabled. The alarm latch does not record the occurrence of a fault or unlocked state if the indicator’s alarm is disabled.

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><123456789ABCDE><CR><LF>

where:

F= ASCII character F

7= ASCII character 7

3= ASCII character 3

<SP>

=

ASCII space character one or more.

<SEP>

=

one or more separators characters, space, tab, or comma.

72

 

XLi IEEE 1588 Clock

997-01510-03, Rev. C, 12/12/2006

Page 80
Image 80
Symmetricom XLi IEEE 1588 manual GPS PRI OK Alarm Enabled, F73CR, F73SSSTATUSSOURCES123456789ABCDECRLF