Clock status monitoring, Why would a device clock be unstable, Passive monitoring – ClearOne Dante Controller User Manual
Page 39: Active monitoring, Clock status, Monitoring
Dante Controller User Guide
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Clock Status Monitoring
Dante devices are monitored by Dante Controller to establish the status of their clock synchronization with
the Dante network master clock.
There are two levels of monitoring: 'passive' and 'active'.
In passive mode, Dante Controller will report if a clock loses sync (or regains sync) with the master clock.
In active mode, Dante Controller will
also report if a clock is showing signs of instability. If a device clock
is significantly unstable, it can lose sync with the master clock, which will result in the device being
automatically muted.
Why would a device clock be unstable?
There are a range of network conditions that can interfere with a device’s clock stability. These include:
n
A switch on the network is configured to use Energy Efficient Ethernet ('Green Ethernet') func-
tionality
n
A 100 Mb switch or link is present where a Gigabit connection is required
n
One or more switches are incorrectly configured
n
A 'problematic' external word clock is being used as the master clock
Refer to the
for more information.
Passive monitoring
Passive monitoring is on all the time. If a Dante device loses sync with the master clock, or regains sync
with the master clock, it reports the event to Dante Controller. Dante Controller records these events in a
log file, and also will display an alert: the Clock Status Monitor icon (at the bottom right corner of the main
window) will light up red.
Clicking the icon opens the
, which includes the clock status event log, and a clock
status histogram.
Active Monitoring
When active monitoring is switched on, Dante Controller begins actively monitoring the behaviour of
supported devices to identify signs of clock instability. If a clock exhibits significant instability, the Clock
Status Monitor icon will light up amber, and a warning event will be recorded in the clock status event log.
Click the icon to open the
.
Active monitoring is off by default. To activate it, click the Clock Status Monitoring button on the main
toolbar: