"AFG31000信号发生器编程手册" - CSDN文库

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Introduction

AFG31000 Series Arbitrary Function Generator Programmer's Manual 3

GPIB requirements

Observe the following rules when you use your arbitrary function generator with a GPIB cable:

▪ Assign a unique device address to each device that uses the GPIB cable (this is also known as

the bus). No two devices can share the same device address.

▪ Do not connect more than 15 devices to any one bus.

▪ Connect one device for every 2 meters (6 feet) of cable used.

▪ Do not use more than 20 meters (65 feet) of cable to connect devices to a bus.

▪ Turn on at least two-thirds, or 67%, of the devices on the network while using the network.

▪ Connect the devices on the network in a star or linear configuration, as shown in the next figure.

Do not use parallel or loop configurations.

Figure 2: Typical GPIB network configuration

Syntax and commands

8 AFG31000 Series Arbitrary Function Generator Programmer's Manual

Command and query structure

Commands consist of set commands and query commands. Commands change instrument settings or

perform a specific action. Queries cause the instrument to return data and information about its status.

Most commands have both a set form and a query form. If the set form parameter has a minimum and

maximum, it will also support a query.

The query form of the command is the same as the set form except that it ends with a question mark.

For example, the set command DISPlay:BRIGhtness has a query form DISPlay:BRIGhtness?.

Not all commands have both a set and a query form; some commands are set only and some are query

only.

A few commands do both a set and query action. For example, the *CAL? command runs a

self-calibration program on the instrument, then returns the result of the calibration. A command

message is a command or query name, followed by any information the instrument needs to execute

the command or query. Command messages consist of five element types.

A command message is a command or query name, followed by any information the instrument needs

to execute the command or query. Command messages consist of five element types.

Table 3: Commands, queries, and query response definitions

Commands:

Commands cause the instrument to perform a specific function or change one of its

settings. Commands have the following structure:

[:]<Header>[<Space><Argument>[<Comma><Argument>]...]

Queries:

Queries cause the AFG to return information about its status or settings. Queries

have the following structure:

[:]<Header>?

[:]<Header>?[<Space><Argument>[<Comma><Argument>]...]

You can specify a query command at any level within the command tree unless

otherwise noted. These branch queries return information about all the mnemonics

below the specified branch or level.

Query

Responses:

When a query is sent to the AFG, only the values are returned. When the returned

value is a mnemonic, it is noted in abbreviated format.

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