Latency / JitterLatency / Jitter
timestamptimestamp
If selecting RatioRatio, set the frame loss ratio.
JitterJitter
Select Jitter to measure it.
When selecting ThresholdThreshold check box and enter the value, Pass/Fail is judged.
LatencyLatency
Select the check box to measure it.
When selecting ThresholdThreshold check box and enter the value, Pass/Fail is judged.
This items allow you to configure the resolution of JitterJitter and LatencyLatency.
Version 9.05 or olderVersion 9.05 or older
When selecting the check box, the measurement is performed with a resolution
of 0.1 μs which is same as the software version of Version 9.05 or older.
It is not available to perform measurement by using Network Masters which
have different resolution setup. If the software version of the Network Master
on the opposite side at the facing test is 9.05 or older, select this.
At Ethernet + OTN or WAN measurement, this is automatically selected.
When not selecting the check box, the measurement can be performed with a
resolution of 0.005 μs depending on "Timestamp source" selection and using
a GPS. When QSFP-DD and OSFP are used for the interface, this resolution is
automatically performed.
SourceSource
Select a timestamp source for measurement. The color of the right-hand indicator
shows whether latency and/or jitter can be measured or not.
Green: Latency and/or jitter can be measured.
Red: There is a possibility that the timestamp source signal could not be
detected. For the detection status of the timestamp source signal, refer to
Timestamp source availabilities.
Only when Version 9.05 or olderVersion 9.05 or older is NOT selected, GPS (Ext ref. 10MHz)GPS (Ext ref. 10MHz), and
1PPS(Ext ref. 10MHz)1PPS(Ext ref. 10MHz) can be selected.
When GPSGPS, 1PPS(Ext ref. 10MHz)1PPS(Ext ref. 10MHz), or GPS(Ext ref. 10MHz)GPS(Ext ref. 10MHz) is set, the
measurement can be performed by using two Network Masters which have
made synchronized.
In this case, set the same option to Source(Ext ref. 10MHz)Source(Ext ref. 10MHz) of both Network
Master.
Round Trip time and One Way Latency can be measured by setting Source in
combination show in the table below.
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