Microsemi SyncServer S200 User Manual page 49

5. If an Input Reference becomes available again, the Hardware Clock synchronizes with it
and the time quality character becomes " " (time valid) again.
Usually there is a short delay between the Hardware Clock changing state and the time qual-
ity character changing.
Here are some potential guidelines for configuring the Flywheel Quality Character (FQC):
The user sets the FQC to " " if one or more of the following are true:
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The SyncServer is configured with two or more synchronizing NTP associations
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and the user is satisfied with using time from other NTP associations.
The SyncServer oscillator type has superior time keeping properties compared to
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the receiving equipment. This is usually the case since most computer equipment
uses uncompensated quartz oscillators.
The user sets the FQC to "F" if the receiving equipment can handle "F" as a time quality
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character in some way that is useful and distinct from the " " or "X" time quality char-
acters.
The user sets the FQC to "X" so that the receiving equipment to handles time from NTP
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or the Hardware Clock internal oscillator as "X" (time invalid).
Troubleshooting: If the time quality character remains "X" (time invalid) even though Input
References are connected to the SyncServer.
Verify that the physical connection to the input connector is valid and that there are no
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cable breaks or short circuits.
On the TIMING - HW Clock page, verify that the Input Reference is Enabled and that Forced
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Timing Source is set to Auto.
For IRIG-B, on the REFERENCES - IRIG-B page, check that the Timecode Input setting
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matches the input signal type.
For GPS, wait for the GPS receiver to complete the GPS acquisition process and
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achieve "locked" status. Also see Operating in "Window Mode" (on page 102).
Also see TIMING - Holdover (on page 45) and TIMING - HW Clock.
Note: If the user sets Forced Timing Source on the TIMING - HW Clock page to Free Run, the
Flywheel Quality Character in effect at that moment remains in effect thereafter.
997-01520-02 Rev. G2..........................................................................
TIMING Tab
Page 49