Web Interface
n
Auto: The SyncServer automatically synchronizes with a Hardware Clock Input Refer-
ence , or a synchronizing NTP association.
n
Free Run: The user sets the time on the SyncServer by entering the UTC date and time
under UTC Time. The SyncServer uses its internal oscillator to keep time. This setting over-
rides the Hardware Clock's Input References. However, a synchronizing NTP asso-
ciation can override the FreeRun setting:
n If the user intends to use UTC time, Microsemi recommends keeping the current
NTP configuration.
n If the user intends to distribute non-UTC time, Microsemi recommends changing
the current NTP configuration by deleting all synchronizing NTP associations.
See Setting the Time Manually (on page 177) and Distributing Non-UTC
Time (on page 180).
Microsemi recommends using the Auto setting.
Also see Hardware Clock (on page 196).
IMPORTANT: If the user is preparing to switch from Free Run to Auto and the time is more
than 1000 seconds off UTC time, manually set it within 1000 seconds of UTC time before
switching to Auto.
Note: On the Sysplex Timer output, if the user sets Forced Timing Source to Free Run, the
Sysplex Flywheel Quality Character in effect at that moment remains in effect thereafter.
Also see TIMING - Sysplex (on page 64).
Ignore UTC Corrections from GPS Reference
When the Hardware Clock is locked to the GPS receiver, the GPS receiver passes GPS
time and a GPS-UTC offset to the Hardware Clock.
When Ignore UTC Corrections from GPS Reference setting is:
n Unselected, the Hardware Clock uses the GPS-UTC offset and passes UTC time to the
NTP daemon. (Recommended) (Factory Default)
n Selected, the Hardware Clock ignores the GPS-UTC offset and passes GPS time to the
NTP daemon.
To use this setting, consult Distributing GPS Time (on page 178).
This setting has no effect when the Hardware Clock is locked to non-GPS references.
WARNING: The Free Run and Ignore UTC Corrections from GPS Reference settings can
have serious effects upon timing networks and systems that expect UTC time. These settings
should only be used by knowledgeable and authorized persons under carefully controlled con-
ditions.
Use the APPLY button to apply changes to the configuration.
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