EXFO FTB-8500 Series for FTB-500 - Manual (Page 364)

EtherSAM Tabs
350 FTB-8500 Series and FTB-8120NGE/8130NGE
Service Performance Test (Results)
Round Trip Latency
The round trip latency (delay) is measured for each stream on all valid
frames. The maximum, minimum, current, and average delay values are
reported. The pass
or fail verdict is also displayed for the maximum
round trip latency. For Dual Test Set, the Round Trip Latency is only
displayed on the Remote to Local page. For FTB-8120NGE and
FTB-8130NGE in Dual Test Set, only available when round-trip latency
measurement mode is selected.
One-Way Latency
The one-way latency (delay) is measured for each stream on all valid
frames. The maximum, minimum, current, average, and samples delay
values are reported. Samples indicates the number of frames used for
one-way latency delay measurements. The pass or fail verdict is also
displayed for the maximum one-way latency.
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 or when the maximum latency is higher than 500 ms.