Virtual Clock Overview - Safran WR-ZEN Series User Manual

5.1.3

Virtual Clock Overview

The concept of "Virtual Clock" has been introduced in the new version of WRZ-
OS to aid monitoring of the global timing status of the device. It allows to
abstract the way the timing sources discipline the local oscillator and summarizes
how the device will announce its own clock information through the outputs.
Figure 5-3:
When using the FOCA policy (see
clock and outputs"
source (e.g., tsrc
forwarded by all the outputs:
The following figure displays the overview panel of the virtual clock information
when the device is using an external reference from front-panel (GM) as the act-
ive source.
CHAPTER •
5 WR-ZEN Series User Manual Rev. v5.1
Note: FOCA is based on BMCA, thus it is compatible with all the
clock quality and timing information fields. In other words, this
means that a device running FOCA strategy can provide timing to a
BMCA device and BMCA information is provided to FOCA
algorithm.
Data-flow between timing sources, virtual clock and outputs
above), the virtual clock will be fed by the active timing
), then this information (clock quality & time properties) will be
1
directly in case of PTP/WR protocol.
by properly modifying the corresponding fields in the case of NTP, NMEA,
etc.
5.1 Multi-sources & Resiliency
"Data-flow between timing sources, virtual
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