EXFO FTB-8500 Series for FTB-500 - Manual (Page 438)

Expert Mode Tabs
424 FTB-8500 Series and FTB-8120NGE/8130NGE
Expert Mode (RFC 2544)
Expert Mode (RFC 2544)
Expert Mode allows the configuration of the thresholds for which each
statistic will be compared to declare a PASS or FAIL verdict.
Press TEST and Expert Mode.
Expert Mode
Allows enabling/disabling the Expert Mode. This setting is disabled by
default.