EXFO FTB-8500 Series for FTB-500 - Manual (Page 254)

Stream Analyzer Tabs
240 FTB-8500 Series and FTB-8120NGE/8130NGE
Stream
Throughput
The throughput is measured for each stream on all valid frames (valid
Throughput tag with no FCS error). The maximum, minimum, current, and
average throughput results are reported.
Unit choices are %, and Mbps. The default setting is %.
Note: For the Current value, 0 is displayed when no RX rate has been measured
in the last second.
Round Trip Latency
The round trip latency (delay) is measured for each stream on all valid
frames (valid Latency tag, expected originator identifier value, and no FCS
error). The maximum, minimum, current, and average delay values are
reported.
Note: Round Trip Latency statistics are only available in loopback test topology.
Note: Delay measurements smaller than 15 μs will be discarded, not used for the
sampling process, and “< 0.015” will be displayed. For the Current value,
Not measurable is displayed when no delay has been measured in the last
second.
Jitter
The Jitter is measured for each stream on all valid frames (in-sequence
frames, valid Jitter tag, and no FCS error). The estimated Jitter, maximum,
minimum, current, and average delay values are reported.
Note: Delay variation measurements smaller than 15 μs will be discarded, not
used for the sampling process, and “< 0.015” will be displayed as the
minimum value. For the Current value, Not measurable is displayed when
no delay has been measured in the last second.