Orolia Spectracom VelaSync 1232, User Manual

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References can be a GNSS receiver, or other sources delivered into your VelaSync unit via
dedicated (mostly optional) inputs. It is also possible to enter a system time manually, which
VelaSync then can synchronize to.
In order for VelaSync to declare synchronization, it needs both a valid 1PPS , and Time ref-
erence.
The concept of Reference Priority allows the ranking of multiple references for redund-
ancy. This allows VelaSync to gracefully fall back upon a lower ranking 1PPS or Time ref-
erence without transitioning into Holdover, in case a reference becomes unavailable or
invalid. The priority order you assign to your available references typically is a function of
their accuracy and reliability.
Note: The References shown on your screen may look different from the
ones in the illustration below, depending on your VelaSync High-Speed
Enterprise Time Server model and hardware configuration.
Each available type of Time and 1PPS input reference is assigned a human-readable name
or “title” that is used in the Reference Priority table, indicating the type of reference. The
reference titles are listed in the following table:
Table 3-1:
Reference priority titles
Title Reference
ASCII Timecode ASCII serial timecode input
External 1PPS input External 1PPS input
3.3 Managing References
CHAPTER
3
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