098-00720-000 Revision D1 – February, 2018 SyncServer 600 Series User’s Guide 79
Chapter 4
Status / Information Windows
Table 4-2. Status - Clock State Descriptions
Status Indication Meaning Details
Warmup SyncServer not ready for any type of
synchronization functionality. This is a
one-time status following power-up
Directly equal to the common
warmup clock state (to both freq
and time)
Freerun SyncServer does not have a time
reference and never has had one since
powerup.
Handset For future use.
Locking SyncServer has selected a qualified
active time input for use and is now in
process of aligning all outputs to it.
In this status, the Current
Source row will, by definition,
have a “green” item that has a
match to it in the Timing
Sources row.
An “active” time source just
means one that is continuously
providing time (where
continuous is a relative term –
in general it is an update per
second).
Locked SyncServer outputs are now aligned to a
selected active time source.
Bridging SyncServer no longer has a selected
active time source, but it hasn’t been that
way for very long.
This is really just the beginning
of holdover, but is a period
where the output performance
should be as good as when in
Locked. It provides a hysteresis
buffer to prevent nuisance
Locked-Holdover-Locked
transitions.
In this state the Current Source
row will NOT have a green item
from the Timing Sources row.
Holdover SyncServer no longer has a selected
active time source, and it has been that
way for longer than the Bridging
duration. Also the condition for “red
holdover” (next row) is not met.
Either we are holdover using an
external frequency reference
OR we are in holdover using the
SyncServer internal reference
AND the duration is less than a
user-specified time duration.
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