EXFO FLS-2200 Broadband Source - Manual (Page 21)

Getting Started with Your Broadband Source
Broadband Source 13
Turning On/Off the Broadband Source

The source status indicator shows whether the source is active or not
(ON/OFF). In the case of an active source, a graphical element
representing a light beam is also displayed.

The wavelength and drive current indicator shows the source’s
nominal wavelength (in nanometers) and the selected drive current
(in milliamperes).

The remote control indicator (RM) appears when the unit is currently
controlled by remote commands (via GPIB or RS-232 communication).
Note: You must set the GPIB bus line to True in GPIB or send the *REM command
in RS-232 for the remote control indicator to be displayed.

The remotely-locked keyboard indicator (LK) shows that a remote
application is preventing you from using the unit’s front panel buttons
(keyboard)—except the red button used to turn the unit on or off.
When the unit is turned off, the current Setup menu settings remain in the
unit’s memory. These settings include display features and remote control.