Exfo FVA-3150 Variable Attenuator User Manual download pdf (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.

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Exfo FVA-3150 Variable Attenuator User Manual Page 83