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5
Controls, Indicators and Connections
28
4
Dante Controller
Clock Synchronisation
Precision Time Protocol (PTP) is used to keep audio being transmitted
between devices in sync. Clock synchronisation can be monitored in the
Clock Status
tab.
Dante devices use PTPv1 for sychronisation. The
Primary v1 Multicast
column indicates whether a device is a PTPv1 master (Leader) or slave
(Follower). A master device provides a clock which all slave devices sync
with. The master device is automatically selected using the best master
clock algorithm (BMCA), however this can be overriden by selecting the
Preferred Leader
checkbox.
Fig 4-16: Clock status tab
On devices with the
AES67 Mode
enabled the
Primary v2 Multicast
column
indicates whether the device is a PTPv2 master or slave. An AES67 enabled
device will act as a boundary clock keeping PTPv1 devices in sync with
PTPv2 devices. Additional AES67 enabled devices will become passive
PTPv1 devices.
In the example above AVN-CU4-Matt is AES67 enabled and has become a
slave (Follower) to another PTPv2 device, the other PTPv2 device is not a
Dante device and therefore not displayed within Dante Controller. AVN-
CU4-Matt then acts as a boundary clock keeping PTPv1 devices in sync with
PTPv2 devices.
Fig 4-17: Clock status using an AES67 master clock
