GRASS VALLEY IQUCP25, Руководство пользователя

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181
UCP - 3901
User Manual
Version Errs The IQUCP25/50 supports PTPv2 only.
If a PTPv1 message is received, it is discarded, and this counter
incremented. This would be an indication that the
grandmaster clock is not configured correctly.
Unknown Msgs If the product receives messages on the PTP multicast address
port 319 or 320 that are not messages defined as PTP ones
this counter is incremented.
Length Errs PTP messages with an invalid length cause this counter to
increment.
Unexpected 2 Steps Increments on the reception of a
follow_up
message but the
sync message is indicating 1 step.
RX Timestamp Errs Increments for every PTP message where the sequence
number is as expected but its timestamp is not valid.
TX Timestamp Errs Increments for every
delay_resp
message where its
sequence number is as expected but its timestamp is not
valid.
Av Delay This is the average network delay time from the grandmaster
to the UCP. This should be stable and in the order of 10-20μs.
Av Error The average error is the difference between the grandmaster
and the UCP local clock. If locked, this number will be small.
Sync Interval From IEEE1588 7.7.2.1: "For each of the message types
Announce
,
Sync
,
Delay_Req
and
Pdelay_Req
, the mean time
interval between successive messages shall be represented as
the logarithm to the base 2 of this time interval measured in
seconds on the local clock of the device sending the message.
The values of these logarithmic attributes shall be selected
from integers in the range ?128 to 127 subject to further limits
established in an applicable PTP profile. The interpretation of
the
logMessageInterval
depends on the message type; see
13.3.2.11. Except for
Delay_Req
messages (see 9.5.11.2), a
node shall, with 90% confidence, issue messages with
intervals within ±30% of the stated value of this attribute."
Request Interval Return actual minimum interval between delay request
messages. This is as set in the
PTP Delay Request Frequency
control. See Configuration on page 174.
Values are, {256/s, 128/s, 64/s, 32/s, 16/s, 8/s, 4/s, 2/s, 1s, 2s, 4s,
8s, 16s}.
Clock Loaded Increments if the interface was live and the PTP was forced to
update (crash lock).
Synchronizations Increments every time a PTP lock is achieved.
Time Taken to Lock Length of time it has taken to lock the interface.
Item Description