EXFO FVA-3150 Variable Attenuator - Manual (Page 83)

Remote Control Commands
Variable Attenuator 77
IEEE 488.2 Required Commands
The FVA-3150 Variable Attenuator also recognizes commands that can only
be used with RS-232 communication. These commands are summarized
below.
Command Function
*LOK Set Remote Lockout programming state
*LOK? Remote Lockout programming state query
*LOK
Description This command is used to lock and unlock the FVA-3150 keypad.
Once the FVA-3150 keypad is locked, no external input can
interfere with the GPIB communication. The only way to unlock
the keypad is to use the *LOK command again or turn off the
unit.
Syntax *LOK <wsp><data>
Parameters The <data> parameter can be “1” to lock the keypad or “0” to
unlock the keypad.
Example *LOK 1
Note When the keypad is locked, the unit will beep twice if any key is
pressed on the keypad. The Remote indicator appears in the
lower left corner of the display while the unit is being controlled
remotely.
This command can only be used when working with RS-232
communication.