EXFO FTB-8500 Series for FTB-500 - Manual (Page 56)

Introducing the Smart User Interface
42 FTB-8500 Series and FTB-8120NGE/8130NGE
Global Test Status and Controls
Global Test Status and Controls
Global Test Status
The global test status area displays the alarm, verdict, and test timer.
Clicking on this area maximizes the view of these status. The maximized
view is useful to facilitate distant viewing of these status.
To minimize the view, either click on the global test status area or click
anywhere on the maximized status area.

H (History): Indicates that alarms/errors occurred in the past. A grey
background indicates that the test did not run yet, a green background
indicates that no alarm/error has occurred, while a red background
indicates that at least one alarm/error has occurred.