EXFO FTB-8500 Series for FTB-200 - Manual (Page 347)

Expert Mode Tabs
Ethernet and Fibre Channel Application 333
Latency (RFC 2544)

Copy From Measurement button: Copy the performance result
minimum values from the test that ran previously and use it as the
Pass/Fail criteria. If no test ran before, default values used will be
0.015 ms with Store and Forward mode.

Unit: Select the unit. Choices are s, ms, μs, and ns. The default setting
is ms.

Mode: Select the Mode. Choices are Cut Through and Store and
Forward. The default setting is Store and Forward.
Cut Through allows the calculation of the propagation time of a bit.
Store and Forward allows the calculation of the propagation time of a
frame.

Displayed Results: Select the displayed results mode. Choices are
Current, Minimum, Maximum, and Average. The default setting is
Current.