Axia xSelector, Installation & User Manual

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Synchronization
Livewire’s clocking system is automatic and largely transparent to end users. If no clock is present on the
network, Axia devices automatically negotiate a master based on priority settings and the lowest MAC address. The
following options may be used to modify clocking, but we strongly suggest you leave them at default values unless
instructed otherwise by an Axia Support expert.
• Clock mode:
»
Livewire IP Low Rate (the default setting) is suggested for a typical Livewire network. Livewire
IP “STL” is for applications where a node is at the remote end of an STL link (Livestreams are not
supported while in this mode).
»
Livewire IP High Rate
tasks the xNode to synchronize to the fast clock, and is not needed in most
cases.
»
Livewire Ethernet is a legacy sync method available for any customers still running superceded
systems.
»
PTP/ IEEE 1588 ARB Clock Class 248 enables the xNode to participate in the execution of the
best master clock algorithm for a PTP (Precision Time Protocol) network (enabling it to be a master
PTP clock).
»
PTP/IEEE 1588 Slave
enables the xNode to synchronize to a PTP network.
»
NTP Slave is used for special applications that synchronize from an NTP source (Livestreams not
supported within NTP mode).
• Livewire Clock Master Priority:
In a Livewire network, higher priority is given to nodes with a higher
numerical priority setting. A value of “0” will never generate clock; a value of “7” will always generate
clock. Values between will generate clock if no clock is received from another device, and the system will
elect a master source based on priority settings.
7 (Always master) “STL snake”
is used in cases where the xNode is at one end of a wireless link. This
mode will cause the node to generate clock and will suppress the generation of fast clock.
3 (default priority) allows any device to become a source of clock, with equal priority.