098-00720-000 Revision B – April, 2016
SyncServer 600 Series User’s Guide
67
Chapter 4
Status / Information Windows
GNSS Status & Information
The GNSS window in the dashboard, as shown in
, displays status details
and information about GNSS. C/No is the carrier-to-noise density which is defined
as the carrier power divided by the noise power spectral density. Higher C/No
results in better tracking and performance.
Current Source taken
from Timing Sources
Locking
Locked
Relocking
When the status is any of these there
MUST be a selected time source, which
takes precedence in the Current Source
row (more important than if there is also a
qualified holdover source). There must be
at least one green item in the Timing
Sources row. The leftmost green one will
be identically indicated in the Current
Source row. This is because the leftmost
green item in Timing Sources is the highest
priority time source and therefore must be
selected. For example, if it is GNSS it will
appear identically as Current Source and in
Timing Sources row.
Current Source taken
from Holdover Sources
Freerun
Bridging
Holdover
Holdover
For any Status in this category there cannot
be a qualified Timing Source (nothing
green in that row), so it is certain that
SyncServer is using frequency-only
reference. If there is a qualified Holdover
Source (meaning something green in this
row), then the leftmost green one will be
the current source.
If there is no qualified Holdover source
(nothing green in that row) then all that
remains is the SyncServer internal
reference, which is what appears in the
Current Source row. In this case the entry
will be one of the following, depending on
the specific SyncServer product oscillator
type:
Internal Rb,
Internal OCXO
Standard
Table 4-3. Status - Current Source Details
Item
Status Where it Will
Happen
Details