Spectracom VersaSync User Manual page 217

1.
2.
The Oscillator Status Panel
This panel provides comprehensive information on the current status of VersaSync's timing state.
CHAPTER •
4 VersaSync User Manual Rev. 6.0
Navigate to MANAGEMENT > OTHER: Disciplining .
The Oscillator Management screen will display. It consists of two panels:
Oscillator Type : Type of oscillator installed in the unit.
Disciplining State : State of oscillator control and disciplining; indicates whether or not the
internal oscillator is currently being disciplined (steered to an input reference). The states
are: "Warm up", "Calibration", "Tracking Setup", "Lock State", "Freerun", and "Fault".
: A tracking measurement [scaled time, in ns, or ms] of the internal
1PPS Phase Error
1PPSs' phase error with respect to the selected input reference. Long holdover periods
or an input reference with excessive jitter will cause the phase error to be high. The oscil-
lator disciplining control will gradually reduce the phase error over time. Alternatively,
restarting the tracking manually (see "Restart Tracking" under "Configuring the Oscil-
lator" on page 172), or automatically via a pre-set Phase Error Limit, will quickly reduce
the phase error.
10 MHz Frequency Error : An internal estimated calculation (in Hertz) of the internal oscil-
lator's frequency error, based on the phase accuracy error at the beginning and end of
a frequency measurement window (the length of this window will vary depending upon
the type of oscillator installed and the oscillator adjustment algorithm).
: Current DAC value, as determined by the oscillator disciplining sys-
Current DAC Setting
tem. The value is converted into a voltage that is used to discipline the oscillator. A stable
4.6 Quality Management
205