GRASS VALLEY IQMIX25 Series, User Manual

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RollCall Control Panel
Time Sync Configuration
Interface Status Details
Item Description
Last Lock Time when PTP last locked.
Lost Lock Time when PTP last lost lock.
1 Step syncs Increments on reception of Sync message that has the
twoStepFlag
=false.
2 Step Syncs Increments on reception of Sync message that has the
twoStepFlag
=true.
Follow Ups Increments on reception of every
follow_up
message.
Delay Requests Increments on reception of every
delay_req
message.
Delay Responses Increments on reception of every
delay_resp
message.
Announcement Messages Increments on reception of every announce message.
Signaling Increments on reception of each PTP Signaling message.
Management Increments on reception of each PTP Management message.
Version Errs The IQMIX 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."