Agilent Technologies 33220A User Manual

210
Chapter 4 Remote Interface Reference
Pulse Width Modulation (PWM) Commands
4
Pulse Width Modulation (PWM) Commands
See also “Pulse Width Modulation” on page 93 in chapter 3.
PWM Overview
The following is an overview of the steps required to generate a
PWM waveform. The PWM commands are listed on the next page.
1 Configure the carrier (pulse) waveform.
Use the APPLy command or the equivalent FUNC, FREQ, VOLT, and
VOLT:OFFS commands to select the function, frequency, amplitude, and
offset of the pulse waveform. PWM is supported only for pulse.
2 Select the modulation source.
The function generator will accept an internal or external modulation
source. Select the modulation source using the PWM:SOUR command.
For an external source, you can skip steps 3 and 4 below.
3 Select the shape of the modulating waveform.
You can modulate the carrier with a sine, square, ramp, noise,
or
arbitrary waveform (pulse and dc are not allowed). Use the
PWM:INT:FUNC command to select the modulating waveshape.
4 Set the modulating frequency.
Set the modulating frequency to any value from 2 mHz to 20 kHz using
the PWM:INT:FREQ command.
5 Set the pulse width or pulse duty cycle deviation.
Set the Width Deviation to a value from 0 to the current Pulse Width
or Period - Pulse Width, whichever is smaller, using the PWM:DEV
command. Or, set the Duty Cycle Deviation to a value from 0 to the
current Duty Cycle or 100 - Duty Cycle, whichever is smaller, using
the PWM:DEV:DCYC command.
6 Enable PWM modulation.
After you have set up the other modulation parameters, use the
PWM:STAT ON command to enable PWM.

Agilent Technologies 33220A Specifications

General

Function Generator Type	Arbitrary Waveform Generator
Output Amplitude	10 mVpp to 10 Vpp into 50 Ω
Output Impedance	50 Ω
Waveforms	Sine, Square, Ramp, Triangle, Noise, Arbitrary
Interface	GPIB, USB
Power Requirements	100 to 240 VAC, 50/60 Hz

Summary

Quick Start

To Prepare the Function Generator for Use

Check the list of supplied items and connect the power cord and turn on the function generator.

To Set the Output Frequency

Steps to change the output frequency to 1.2 MHz using the front panel controls.

To Rack Mount the Function Generator

Instructions for mounting the Agilent 33220A in a standard 19-inch rack cabinet.

Front-Panel Menu Operation

Front-Panel Menu Reference

Overview of the front-panel menus and examples of their use.

To Select the Output Termination

Setting the output termination impedance for accurate amplitude and offset measurements.

To Configure the Remote Interface

Setting up GPIB, USB, and LAN interfaces for remote instrument control.

Features and Functions

Output Configuration

Information on configuring the function generator for outputting various waveforms.

Amplitude Modulation (AM)

Details on setting up and performing amplitude modulation.

Calibration Overview

Introduction to calibration features and security settings.

Remote Interface Reference

SCPI Command Summary

Overview of SCPI command syntax and conventions.

Output Configuration Commands

Low-level SCPI commands for controlling output functions.

Interface Configuration Commands

Commands for configuring GPIB, LAN, and USB interfaces.

Error Messages

Command Errors

List and explanation of errors related to command syntax and parameters.

Execution Errors

List and explanation of errors resulting from incorrect command execution or settings.

Device Dependent Errors

Errors indicating potential hardware failures or memory corruption.

Application Programs

Introduction

Overview of example programs for controlling the instrument via SCPI.

Program Listings

Includes examples like Sine Waveform, Amplitude Modulation, and Pulse Width Modulation.

Tutorial

Direct Digital Synthesis

Explanation of the DDS signal generation technique used by the instrument.

Creating Arbitrary Waveforms

Guide on creating custom waveforms using the front panel or software.

Signal Imperfections

Description of harmonic, non-harmonic, and phase noise imperfections in signals.

Specifications

Waveforms

Lists standard and built-in arbitrary waveform types.

Common Characteristics

Details general specifications like frequency accuracy and amplitude range.

Product Dimensions

Provides physical dimensions for benchtop and rack-mount configurations.