By PRBS test function, you can perform an in-service PRBS test for a board.
PRBS Test
In this user interface, you can perform an in-service PRBS test for a board. The test result is displayed in the coordinates pane.
PRBS Test(WDM)
In this user interface, you can perform an in-service PRBS test for a board of WDM equipment. The test result is displayed in the coordinates pane.