EXFO FTB-8500 Series for FTB-200 - Manual (Page 67)

Introducing the Smart User Interface
Ethernet and Fibre Channel Application 53
Typical Tab Elements
Typical Tab Elements
Once the test is created, different tabs are available allowing test
configuration and monitoring. The following section describes usual
elements appearing on those tabs.
Status LEDs

H (History) LED: Indicates that alarms/errors occurred in the past. A
grey LED indicates that the test did not run yet, a green LED indicates
that no alarm/error has occurred, while a red LED indicates that at
least one alarm/error has occurred in the test.

C (Current) LED: Gives the current status of the alarm/error. A grey LED
indicates that the test is not running, a green LED indicates that there is
no alarm/error, while a red LED indicates that at least one alarm/error
condition has occurred in the last second.
Note: The H and C LEDs are updated every second.