Agilent Technologies E4406A VSA Series User Manual

Chapter 5 235
Language Reference
MEASure Group of Commands
Fetch Commands
:FETCh:<measurement>[n]?
This command puts valid data into the output buffer, but does not
initiate data acquisition. Use the INITiate[:IMMediate] command to
acquire data before you use the FETCh command. You can only fetch
results from the measurement that is currently selected.
If the optional [n] value is not included, or is set to 1, the scalar
measurement results will be returned. If the [n] value is set to a value
other than 1, the selected trace data results will be returned. See each
command for details of what types of scalar results or trace data results
are available. The binary data formats should be used for handling
large blocks of data since they are smaller and faster then the ASCII
format.
Read Commands
:READ:<measurement>[n]?
• Does not preset the measurement to the factory defaults. (The
MEASure? and CONFigure? commands reset the parameters to the
default values.) It uses the settings from the last measurement.
• Initiates the measurement and puts valid data into the output
buffer. If a measurement other than the current one is specified, the
instrument will switch to that measurement before it initiates the
measurement and returns results.
• Blocks other SCPI communication, waiting until the measurement is
complete before returning the results
If the optional [n] value is not included, or is set to 1, the scalar
measurement results will be returned. If the [n] value is set to a
value other than 1, the selected trace data results will be returned.
See each command for details of what types of scalar results or trace
data results are available. The binary data formats should be used
when handling large blocks of data since they are smaller and faster
then the ASCII format.
Measurement settings persist if you initiate a different measurement
and then return to a previous one. Use READ:<measurement>? if you
want to use those persistent settings. If you want to go back to the
default settings, use MEASure:<measurement>?.

Agilent Technologies E4406A VSA Series Specifications

General

Brand	Agilent Technologies
Model	E4406A VSA Series
Category	Test Equipment
Language	English

Summary

Safety Information

Front Panel Error Messages Annunciators

Describes status indicators for transmitter tester functions and error conditions.

1 Preparing for Use

Programming the Transmitter Tester

Explains how to program the E4406A VSA Series Transmitter Tester.

Installing Optional Measurement Personalities

Details the two-step process for installing measurement personalities.

Cables for Connecting to RS-232

Describes various cables and adapters for connecting to PCs and printers via RS-232.

Connecting to a LAN Server

Explains how to connect to a LAN server for instrument control.

2 Programming Fundamentals

SCPI Language Basics

Introduces the SCPI programming language and its core concepts.

Using the Instrument Status Registers

Explains how to monitor instrument hardware and firmware events using status registers.

Overview of the GPIB Bus

Explains the fundamentals of the GPIB instrument nomenclature and command statements.

Using the LAN to Control the Analyzer

Covers various methods to control the analyzer via LAN connection.

3 Programming Examples

Using Markers

Demonstrates how to use markers in a C programming example.

Saving Binary Trace Data in an ASCII File

Provides a C programming example for saving binary trace data to an ASCII file.

Using C Programming Over Socket LAN

Demonstrates simple socket programming using C for analyzer control.

4 Programming Command Cross References

Functional Sort of SCPI Commands

Organizes SCPI commands by function for easier reference.

5 Language Reference

SCPI Command Subsystems

Lists and describes various SCPI command subsystems available in the instrument.

Common IEEE Commands

Details commands specified in IEEE Standard 488.2 for instrument control.

6 Error Messages

Error Queues

Explains the instrument's history and SCPI remote interface error queues.

Error Message Descriptions

Provides descriptions for unnumbered, query, device-specific, execution, and command errors.