DirectOut Technologies PRODIGY.MP, Руководство пользователя

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page 91 of 130 Prodigy.MP Manual - Version 2.0
CHAPTER 6: RAV.IO
Advanced - PTP Settings
PTP Input Selects one or both network ports used for PTP input. Both
ports means input redundancy. *
IP Mode Multicast = Sync messages and delay request are sent
as multicast message to every node within
the network.
Hybrid Mode = Sync messages are sent as multicast,
delay requests are sent as unicast
messages directly to the Grandmaster or
Boundary Clock.**
Mode auto = PTP-clock master / slave configuration is
auto negotiated between devices in the
network. Module’s master / slave state
may change automatically.
slave only = PTP-clock slave configuration is
preferred. Module clocks to another
device in the network
preferred master = PTP-clock master configuration is
preferred. Module acts as network
grandmaster. Priority values are adjusted
automatically to ensure Grandmaster
status. ***
Profile Selects predefined PTP profile (default E2E, default P2P,
media E2E, media P2P) or activates customized PTP profile.
* Using redundant PTP-operation a switch-over is triggered not only at signal
loss of the Grandmaster but depends on the quality of the PTP clock.
Changes (e.g. clock class) are observed permanently and the algorithm
decides for the best signal present.
** Hybrid Mode reduces the workload for all nodes in the network as they do not
receive the (unnecessary) delay requests from other devices anymore.
*** If more than one device announces as PTP-clock master the network
Grandmaster is determined following the Best Master Clock Algorithm (BMCA).
NOTE
PTP profile ‚customized‘ allows for individual adjustment of the PTP parameters. If
profile is set to ‚media‘ or ‚default‘ the PTP parameters cannot be altered and are
displayed only. Factory default setting is PTP Media Profile E2E.