Orolia Spectracom VelaSync 1232, User Manual

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VelaSync allows Reference Monitoring by comparing the phase data of references against
the System Ontime Point. The phase values shown are the filtered phase differences
between each input reference 1PPS, and the internal disciplined 1PPS.
The data is plotted in a graph in real-time. The plot also allows you to display historic data,
zoom in on any data range or on a specific reference. A data set can be exported, or
deleted.
To monitor the quality of references, navigate to TOOLS > SYSTEM: Reference Mon-
itor . The Reference Monitor screen will display:
On the left side of the screen, Status information is displayed for the System and the
References. Note that the Reference Status panel also displays the latest PHASE
OFFSET reading (1) for active references against the System Ontime Point. The reading is
updated every 30 seconds.
This Reference Phase Offset Data is plotted over time (abscissa) in the Reference Mon-
itor panel in the center of the screen. Use the check boxes in the References panel (2) to
select the reference(s) for which you want to plot the phase offset data. Use the handles
(3) to zoom in on a time window.
The scale of the axis of ordinate (4) is determined by the largest amplitude of any of the ref-
erences displayed in the current time window. Use the checkboxes in the References
panel on the right to remove references from the graph, or add them to it.
3.3.3 The GNSS Reference
With most applications, VelaSync will be setup such that it utilizes a GNSS signal as the
primary (if not the only) timing reference.
VelaSync's GNSS receiver utilizes the signal provided by the GNSS antenna.
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3.3 Managing References