EXFO FTB-8500 Series for FTB-200 - Manual (Page 345)

Expert Mode Tabs
Ethernet and Fibre Channel Application 331
Frame Loss (RFC 2544)

Copy From Measurement button: Copy the performance results 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% Loss.

Unit: Unit is set to % Loss frames.

Displayed Step: Indicates the last percentage of the speed used for the
test. Possible values are 100% (or % of the maximum speed) to 0%
with increment set by the Test granularity from the Frame Loss
Configuration on page 261. The default setting is 100% (or % of the
maximum speed). Displayed Step is only available once the Frame
Loss test is running or completed.

Displayed Results: Select the displayed results mode. Choices are
Current, Minimum, Maximum, and Average. The default setting is
Current.