DisplayDisplay StatusStatus
Power Off The MU100090B is turned off.
Initialize
MU100090B is warming up.
When it stabilizes, the OSC lamp illuminates.
Wait for
GPS/GNSS
The MU100090B is waiting for a connection to the GPS or
GNSS to be made.
Wait for 1PPS
Sync. In
The MU100090B is waiting for a signal to be input to the
1PPS Sync. In connector.
Learning With the OSC lamp illuminated and at least four captured
satellites, the MU100090B is trying to synchronize to the
1PPS signals received from the satellites.
Sync with
GPS/GNSS
The Rubidium Oscillator is synchronized to the 1PPS
signals received from the satellites.
Less than three hours have elapsed since the OSC lamp
illuminated.
Sync with 1PPS
Sync. In
The Rubidium Oscillator is synchronized to the signal
input to the 1PPS Sync. In connector.
Less than three hours have elapsed since the OSC lamp
illuminated.
Fine Locked This is displayed when both of the following conditions
are met:
At least three hours have elapsed since the OSC
lamp illuminated.
The current MU100090B status is Sync with
GPS/GNSS or Sync with 1PPS Sync In.
Holdover The MU100090B is in holdover state and the phase drift is
within the specified range.
Holdover: spec out The MU100090B is in holdover state and the phase drift is
out of the specified range.
OSC. Lock Elapsed TimeOSC. Lock Elapsed Time: Displays the time elapsed since the built-in
Rubidium Oscillator reached the stability of 10
−9
(the OSC lamp on the
MU100090B panel illuminated).
Sync. Mode Elapsed TimeSync. Mode Elapsed Time: Displays the time elapsed since the built-in
Rubidium Oscillator was locked to the reference signal.
When the phase-locked condition is lost, this value is reset to 0.
1PPS Sync In Status1PPS Sync In Status: (When Sync Mode is set to 1pps Sync In1pps Sync In) Displays
whether the MU100090B is detecting the 1PPS signal for synchronization or
not.
Holdover AlarmHoldover Alarm: Appears if phase drift is out of the specified range. With the
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