EXFO FTB/IQS-85100G Packet Blazer for FTB-500/IQS-600 - Manual (Page 148)

Test Setup - Test Configurator, Timer, and System
138 FTB/IQS-85100G
Signal - Signal Configuration (OTN)
Signal - Signal Configuration (OTN)
Note: The following signal configuration parameters are available from the
interface block.
From the Test menu, tap Setup, Test Configurator, the interface block,
and on the Signal tab.

OTU4, OTU3, OTU3e1, or OTU3e2

FEC check box, when selected (default), enables the FEC in TX/RX
and allows to detect, report, and correct up to 8 symbol errors
(Correctable) per codeword. If there are over 8 symbol errors
detected, they are reported as uncorrectable errors.
Note: The FEC check box should be selected when the Scrambler check box is not
selected in order to prevent potential alarms caused by a lack of bit
transition on the optical signal. To disable FEC, first select the Scrambler
check box then clear the FEC check box.

Scrambler check box, when selected (default), provides enough
“0” and “1” transitions on the optical signal for clock recovery.
Note: The Scrambler check box should be selected when the FEC check box is not
selected in order to prevent potential alarms caused by a lack of bit
transition on the optical signal. To disable Scrambler, first select the FEC
check box then clear the Scrambler check box.