EXFO FVA-3150 Variable Attenuator - Manual (Page 91)

Remote Control Commands
Variable Attenuator 85
Specific commands-Quick Reference Command Tree
D
Description This command controls the shutter, which can block optical
continuity.
Syntax D
Parameters The parameter can be
“0” to disable the shutter
“1” to enable the shutter
Example D 1
Note This command cannot be issued while a program is running.
D?
Description This query returns the current shutter state.
Syntax D?
Response The shutter state in the format
“0” if the shutter is optically disabled
“1” if the shutter is optically enabled
Example D?