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168 Keysight InfiniiVision 3000T X-Series Oscilloscopes Programmer's Guide

5 Common (*) Commands

Introduction to

Common (*)

Commands

The common commands are defined by the IEEE 488.2 standard. They are

implemented by all instruments that comply with the IEEE 488.2 standard. They

provide some of the basic instrument functions, such as instrument identification

and reset, reading the instrument setup, and determining how status is read and

cleared.

Common commands can be received and processed by the instrument whether

they are sent over the interface as separate program messages or within other

program messages. If an instrument subsystem has been selected and a common

command is received by the instrument, the instrument remains in the selected

subsystem. For example, if the program message ":ACQuire:TYPE AVERage; *CLS;

COUNt 256" is received by the instrument, the instrument sets the acquire type,

then clears the status information and sets the average count.

In contrast, if a root level command or some other subsystem command is within

the program message, you must re-enter the original subsystem after the

command. For example, the program message ":ACQuire:TYPE AVERage;

:AUToscale; :ACQuire:COUNt 256" sets the acquire type, completes the autoscale,

then sets the acquire count. In this example, :ACQuire must be sent again after the

:AUToscale command in order to re-enter the ACQuire subsystem and set the

count.

NOTE

Each of the status registers has an enable (mask) register. By setting the bits in the enable

Keysight Technologies InfiniiVision 3000T X Series User Manual

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