Belden Grass Valley IPVU, Руководство по установке, Страница: 71 / 98

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IPVU
Installation Guide
Time Sync Mode Valid values are:
•
Free running : Card is using its own clock with no reference to any
other source.
• PTP Multicast : Card is synchronizing to a PTP grandmaster clock
using multicast network messages.
• PTP Unicast : As PTP Multicast but using the delay request. Reply
messages are unicast to minimize network traffic.
• NTP : IPVU’s clock is synchronized to an NTP clock. Generally less
precise than PTP.
Time Sync Network
Interface Network port currently being used for synchronization for
IPVU
,
dependent on the choice of interfaces made on the Time
Configuration page. If PTP and multiple interfaces are enabled, the
PTP synchronization will switch ports if it doesn't see regular sync
messages on the port.
Time Sync Clock Identity Identification number of PTP clock being used for synchronization.
This is not necessarily the grandmaster clock identity, as there can
be intermediate clocks between the grandmaster and the card,
depending on network configuration.
Time Sync Clock State Valid values are:
•
Free running : Card is not being synchronized.
• No Lock : PTP being used but clocks haven't synchronized within
+/- 1mS.
• Locked : PTP being used and clocks are within the accepted range.
• NTP : IPVU using NTP to synchronize.
Time Sync Average Delay The current network delay time between the card and the clock
sending the synchronization messages. This should be relatively
constant and is dependant on network configuration.
Dev Delay The current standard deviation in the network delay time between
the card and the clock sending the synchronization messages.
Should be a low number as the network delay is expected to be
constant.
Time Sync Average Error The current difference between the cards time and the
grandmaster time. Should be close to zero once card has
synchronized.
Time Sync Std Dev Error The standard deviation in the average error.
Time Sync Grandmaster Identity of network clock acting as PTP grandmaster. This is the
source of the PTP synchronization messages used by all PTP slave
clocks on the network. If there are multiple grandmasters, they
should negotiate between themselves to identify the most
accurate and then silence the others.
Status Description