Spectracom Corporation
Model 9289
NetClock/NTP Network Time Provider Instruction Manual
3-53
3.4.11 Rebooting the System
The system can be rebooted from the System Reboot screen (Figure 3-52). Simply click the
“Reboot Now” button and wait for the NetClock to reboot.
Figure 3-52: System Reboot Screen
3.4.12 Configuring System Holdover
The user may set the system holdover from the System Holdover screen (Figure 3-53). The
time interval between the loss of the primary external reference and the moment that the
NetClock declares loss of time synchronization is known as
holdover
. While the unit is in
holdover mode, the time outputs are derived from an internal oscillator. Because of the internal
oscillator, accurate time can still be derived even after the primary reference is removed. The
more stable the oscillator is without an external reference, the longer this holdover period can
be. The benefit of holdover is that time synchronization and the availability of the time outputs is
not immediately lost when the reference is no longer available.
Summary of Contents for 9289
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