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Contents

Programming HP VXI Instruments

Common Commands and the Status System

Edition 1

Contents

1

Introduction .................................................................................................................... 5

Programming the Status System .................................................................................. 7

About this Chapter ........................................................................................................ 7
General Status Register Model ..................................................................................... 7

Condition Register ................................................................................................. 8
Transition Filter ..................................................................................................... 8
Event Register  ....................................................................................................... 8
Enable Register  ..................................................................................................... 8
An Example Sequence  .......................................................................................... 8

Required Status Groups .............................................................................................. 10

Status Byte ........................................................................................................... 11
Standard Event Group ......................................................................................... 12
Standard Operation Status Group ........................................................................ 13
Questionable Data Group .................................................................................... 14

Status System Programming Examples ...................................................................... 15

Handling SRQs .................................................................................................... 15
Using MAV to Determine When Data is Available ............................................ 15

Example Program ......................................................................................... 16

Using a Service Request to Detect Errors ........................................................... 18

Example Program ......................................................................................... 19

Command Reference ................................................................................................... 23

About this Chapter ...................................................................................................... 23
STATus ....................................................................................................................... 24

Subsystem Syntax ......................................................................................... 24

:OPERation :CONDition? ................................................................................... 24

Comments ..................................................................................................... 24
Example ........................................................................................................ 24

:OPERation:ENABle ........................................................................................... 24

Parameters ..................................................................................................... 24
Comments ..................................................................................................... 24
Example ........................................................................................................ 24

:OPERation:ENABle? ......................................................................................... 25

Comments ..................................................................................................... 25
Example ........................................................................................................ 25

:OPERation[:EVENt]? ........................................................................................ 25

Comments ..................................................................................................... 25
Example ........................................................................................................ 25

:PRESet ............................................................................................................... 25

Example ........................................................................................................ 25

:QUEStionable :CONDition? .............................................................................. 25

Comments ..................................................................................................... 26