User's Guide DG4000 Series Function/Arbitrary Waveform Generator

User's Guide DG4000 Series Function/Arbitrary Waveform Generator

RIGOL

User’s Guide

DG4000 Series Function/Arbitrary

Waveform Generator

Sept. 2011

RIGOL Technologies, Inc.

RIGOL

Guaranty and Declaration

Copyright

© 2011 RIGOL Technologies, Inc. All Rights Reserved.

Trademark Information

RIGOL is a registered trademark of RIGOL Technologies, Inc.

Publication Number

UGB04102-1110

Notices

RIGOL products are protected by patent law in and outside of P.R.C.

RIGOL reserves the right to modify or change parts of or all the specifications and pricing policies at company’s sole decision.

 Information in this publication replaces all previously corresponding material.

RIGOL shall not be liable for losses caused by either incidental or consequential in connection with the furnishing, use or performance of this manual as well as any information contained.

 Any part of this document is forbidden to be copied or photocopied or rearranged without prior written approval of RIGOL.

Product Certification

RIGOL guarantees this product conforms to the national and industrial standards in China. International standard conformance certification is in progress, e.g. ISO.

Contact Us

If you have any problem or requirement when using our products, please contact

RIGOL or your local distributors, or visit: www.rigol.com

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Safety Requirement

General Safety Summary

Please review the following safety precautions carefully before putting the instrument into operation so as to avoid any personal injuries or damages to the instrument and any product connected to it. To prevent potential hazards, please use the instrument only specified by this manual.

Use Proper Power Cord.

Only the power cord designed for the instrument and authorized by local country could be used.

Ground The Instrument.

The instrument is grounded through the Protective Earth lead of the power cord.

To avoid electric shock, it is essential to connect the earth terminal of power cord to the Protective Earth terminal before any inputs or outputs.

Observe All Terminal Ratings.

To avoid fire or shock hazard, observe all ratings and markers on the instrument and check your manual for more information about ratings before connecting.

Use Proper Overvoltage Protection.

Make sure that no overvoltage (such as that caused by a thunderstorm) can reach the product, or else the operator might expose to danger of electrical shock.

Change The Power Fuse.

If the power fuse needs to be changed, please return the instrument back to our factory and the RIGOL authorized operator will change it for you.

Do Not Operate Without Covers.

Do not operate the instrument with covers or panels removed.

Avoid Circuit or Wire Exposure.

Do not touch exposed junctions and components when the unit is powered.

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Do Not Operate With Suspected Failures.

If you suspect damage occurs to the instrument, have it inspected by qualified service personnel before further operations. Any maintenance, adjustment or replacement especially to circuits or accessories must be performed by RIGOL authorized personnel.

Keep Well Ventilation.

Inadequate ventilation may cause increasing of temperature or damages to the device. So please keep well ventilated and inspect the intake and fan regularly.

Do Not Operate In Wet Conditions.

In order to avoid short circuiting to the interior of the device or electric shock, please do not operate in a humid environment.

Do Not Operate in an Explosive Atmosphere.

In order to avoid damages to the device or personal injuries, it is important to operate the device away from an explosive atmosphere.

Keep Product Surfaces Clean and Dry.

To avoid the influence of dust and/or moisture in air, please keep the surface of device clean and dry.

Electrostatic Prevention.

Operate in an electrostatic discharge protective area environment to avoid damages induced by static discharges. Always ground both the internal and external conductors of the cable to release static before connecting.

Handling Safety

Please handle with care during transportation to avoid damages to buttons, knob interfaces and other parts on the panels.

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Safety Terms and Symbols

Terms in this Manual. These terms may appear in this manual:

WARNING

Warning statements indicate the conditions or practices that could result in injures or loss of life.

CAUTION

Caution statements indicate the conditions or practices that could result in damage to this product or other property.

Terms on the Product. These terms may appear on the product:

DANGER

indicates an injury or hazard may immediately happen.

WARNING

indicates an injury or hazard may be accessible potentially.

CAUTION

indicates a potential damage to the instrument or other property might occur.

Symbols on the Product. These symbols may appear on the product:

Hazardous

Voltage

Refer to

Instructions

Protective

Earth

Terminal

Chassis

Ground

Test

Ground

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General Care and Cleaning

General Care

Do not leave or store the instrument exposed to direct sunlight for long periods of time.

Cleaning

Clean the instrument regularly according to its operating conditions. To clean the exterior surface, perform the following steps:

1. Disconnect the instrument from all power sources.

2. Clean the loose dust on the outside of the instrument with a lint- free cloth

(with a mild detergent or water). When clean the LCD, take care to avoid scarifying it.

CAUTION

To avoid damages to the instrument, do not expose them to corrosive liquids.

WARNING

To avoid injury resulting from short circuit, make sure the instrument is completely dry before reconnecting it to power source.

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Environmental Considerations

The following symbol indicates that this product complies with the applicable

European Union requirements according to Directives 2002/96/EC on waste electrical and electronic equipment (WEEE) and batteries.

Product End-of-Life Handling

The equipment may contain substances that could be harmful to the environment or human health. In order to avoid releasing such substances into the environment and harming human health, we encourage you to recycle this product in an appropriate system that will ensure that most of the materials are reused or recycled appropriately. Please contact your local authorities for disposal or recycling information.

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DG4000 Series Overview

DG4000 is a dual-channel economical, high-performance and multifunctional generator that combines many functions in one, including Function Generator,

Arbitrary Waveform Generator, Pulse Generator, Harmonics Generator,

Analog/Digital modulator and Counter.

Main Features:

 Adopt the Direct Digital Synthesizer (DDS) technology and provide stable, precise, pure and low distortion signals.

 7 inches, 16M true color TFT LCD, displaying parameters and graphics of the two channels at the same time.

 160MHz, 100MHz or 60MHz maximum output frequency (for Sine), 500MSa/s sample rate, 14bits vertical resolution.

 Precisely adjust the phases of the two channels.

 150 waveforms or functions: Sine, Square, Ramp, Pulse, Noise, Sinc,

Exponential Rise, Exponential Fall, ECG, Gauss, Haversine, Lorentz, Dual

Tones, Harmonics, Video Signal, Radar Signal, DC etc.

 Enable to edit 16kpts arbitrary waveform and support step-by-step output of arbitrary waveform.

 Rise Time and Fall Time of the Pulse could be adjusted separately.

 Enable to output harmonic with specified order and amplitude, enable to output up to 16 th

order of harmonic.

 Support to superpose Gauss Noise onto basic waveforms.

 Various modulation types: AM, FM, PM, ASK, FSK, PSK, BPSK, QPSK, 3FSK,

4FSK, OSK and PWM modulations.

 Support frequency sweep and Burst output.

 Dual channels can perform internal/external modulation and internal/external/manual trigger separately or at the same time.

 Dual channels can output sync signal separately or at the same time.

 Support to enable Frequency Coupling, Phase Coupling and Amplitude

Coupling separately or at the same time.

 Provide counter function; enable to measure various parameters of external signal such as frequency, period, duty cycle, positive pulse width and negative pulse width; provide statistic function of measurement results.

 Support waveform copy and state copy between channels.

 Enable to store and recall 10 arbitrary waveform data files and 10 instrument

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state files as well as recall Csv and Txt files stored in USB storage device.

 Plenty of standard interfaces: USB Host, USB Device and LAN

 Abundant I/O: waveform output, sync signal output, modulation input, 10MHz clock input/output, trigger input/output.

 Support USB storage device using FAT file system.

 Support remote control through 10/100M Ethernet web.

 Conform to LXI-C instrument standards (Version 1.2).

 Provide Chinese and English built-in help and input methods.

 Provide powerful waveform editing PC software.

 Provide security lock hole.

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Document Overview

Subjects in this Manual:

Chapter 1 Quick Start

This chapter introduces the front/rear panel, user interface and parameter setting method, as well as announcements during first use of the instrument.

Chapter 2 Basic Waveform Output

This chapter introduces how to output basic waveforms, e.g. Sine and Square.

Chapter 3 Arbitrary Waveform Output

This chapter introduces how to output built-in or user-defined waveforms.

Chapter 4 Harmonics Output

This chapter introduces how to output harmonics with specified order.

Chapter 5 Modulated Waveform Output

This chapter introduces how to output modulated waveforms, e.g. AM, FSK and

PWM.

Chapter 6 Sweep

This chapter introduces how to generate a frequency Sweep.

Chapter 7 Burst

This chapter introduces how to generate a Burst waveform.

Chapter 8 Counter

This chapter introduces how to use the counter.

Chapter 9 Store and Recall

This chapter introduces how to store and recall the waveform data or the instrument state settings.

Chapter 10 Utility and System Settings

This chapter introduces some utility functions and setting methods of system parameters.

Chapter 11 Remote Control

This chapter introduces how to control the instrument remotely.

Chapter 12 Troubleshooting

This chapter lists commonly encountered failures that may appear during the use of the generator and their solutions.

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Chapter 13 Specifications

This chapter lists the performances and general specifications of the instrument.

Chapter 14 Appendix

This chapter provides the information about the options and accessories, as well as other points for attention.

Format Conventions in this Manual:

1. Buttons:

The function key at the front panel is denoted by the format of “Text Box +

Button Name (Bold)” in the manual, for example, Sine.

2. Menu Softkey:

The menu softkey is denoted by the format of “Character Shading + Menu Word

(Bold)” in the manual, for example, Freq.

3. Connector

The connector at the front or rear panel is denoted by the format of

“Brackets+Connector Name (Bold)” in the manual, for example, [Sync].

4. Operation Steps:

The next step of the operation is denoted by an arrow “” in the manual. For example, SineFreq represents pressing the function key Sine at the front panel and then pressing the menu softkey Freq.

Content Conventions in this Manual:

DG4000 series cover the following models. This manual takes DG4162 as an example.

Model Channels Max. Frequency Sample Rate

DG4062

DG4102

DG4162

2

2

2

60MHz

100MHz

160MHz

500MSa/s

500MSa/s

500MSa/s

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Contents

Guaranty and Declaration ......................................................................... I

Safety Requirement ................................................................................ II

General Safety Summary ........................................................................... II

Safety Terms and Symbols ....................................................................... IV

General Care and Cleaning ........................................................................ V

Environmental Considerations ............................................................ VI

DG4000 Series Overview....................................................................... VII

Document Overview ............................................................................... IX

Chapter 1 Quick Start ......................................................................... 1-1

General Inspection ................................................................................ 1-2

To Adjust the Supporting Legs ................................................................ 1-3

Dimensions ........................................................................................... 1-4

Front Panel ........................................................................................... 1-6

Rear Panel ........................................................................................... 1-13

To Connect to Power ............................................................................. 1-16

User Interface ...................................................................................... 1-17

Parameter Setting Method ..................................................................... 1-20

Numeric Keyboard.......................................................................... 1-20

Direction keys and Knob ................................................................. 1-21

To Use the Built-In Help ........................................................................ 1-22

To Use the Security Lock ....................................................................... 1-23

To Use the Rack Mount Kit .................................................................... 1-24

Kit Parts List .................................................................................. 1-24

Installation Tool ............................................................................. 1-25

Installation Space .......................................................................... 1-26

Installation Procedure .................................................................... 1-28

Chapter 2 Basic Waveform Output ..................................................... 2-1

To Select Output Channel ....................................................................... 2-2

To Select Basic Waveform....................................................................... 2-3

To Set Frequency .................................................................................. 2-4

To Set Amplitude ................................................................................... 2-5

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To Set DC Offset Voltage ......................................................................... 2-7

To Set Start Phase .................................................................................. 2-8

Align Phase ........................................................................................... 2-9

To Set Duty Cycle ................................................................................. 2-11

To Set Symmetry .................................................................................. 2-12

To Set Parameters for Pulse .................................................................. 2-13

Pulse Width/Duty Cycle .................................................................. 2-13

Leading/Trailing Edge Time ............................................................. 2-14

Delay ........................................................................................... 2-15

Recover Delay ............................................................................... 2-15

To Enable Output ................................................................................. 2-17

Basic Waveform Output Example ........................................................... 2-18

Chapter 3 Arbitrary Waveform Output ............................................... 3-1

To Enable Arbitrary Waveform ................................................................. 3-2

Step-By-Step Output Mode ...................................................................... 3-3

To Select Arbitrary Waveform .................................................................. 3-4

Built-In Waveform ............................................................................ 3-4

Stored Waveform ............................................................................. 3-9

Volatile Waveform ............................................................................ 3-9

To Create New Arbitrary Waveform ........................................................ 3-10

Example: Edit Points ...................................................................... 3-13

Example: Edit Block ....................................................................... 3-15

To Edit Arbitrary Waveform ................................................................... 3-17

Chapter 4 Harmonic Output ............................................................... 4-1

Overview ............................................................................................... 4-2

To Set Fundamental Waveform Parameters ............................................... 4-2

To Set Harmonic Order ........................................................................... 4-3

To Select Harmonic Type ......................................................................... 4-3

To Set Harmonic Amplitude ..................................................................... 4-4

To Set Harmonic Phase ........................................................................... 4-4

Chapter 5 Modulated Waveform Output ............................................ 5-1

AM ....................................................................................................... 5-2

To Select AM Modulation .................................................................. 5-2

To Select Carrier Waveform Shape ..................................................... 5-2

To Set Carrier Frequency .................................................................. 5-2

To Select Modulating Waveform Source .............................................. 5-3

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To Set Modulating Waveform Frequency ............................................ 5-4

To Set Modulation Depth ................................................................. 5-4

FM ....................................................................................................... 5-5

To Select FM Modulation .................................................................. 5-5

To Select Carrier Waveform Shape .................................................... 5-5

To Set Carrier Frequency ................................................................. 5-5

To Select Modulating Waveform Source ............................................. 5-6

To Set Modulating Waveform Frequency ............................................ 5-7

To Set Frequency Deviation .............................................................. 5-7

PM ....................................................................................................... 5-8

To Select PM Modulation .................................................................. 5-8

To Select Carrier Waveform Shape .................................................... 5-8

To Set Carrier Frequency ................................................................. 5-8

To Select Modulating Waveform Source ............................................. 5-9

To Set Modulating Waveform Frequency ........................................... 5-10

To Set Phase Deviation ................................................................... 5-10

ASK..................................................................................................... 5-11

To Select ASK Modulation ............................................................... 5-11

To Select Carrier Waveform Shape ................................................... 5-11

To Set Carrier Amplitude ................................................................. 5-11

To Select Modulating Waveform Source ............................................ 5-12

To Set ASK Rate ............................................................................. 5-12

To Set Modulating Amplitude ........................................................... 5-13

To Set Modulating Polarity .............................................................. 5-13

FSK ..................................................................................................... 5-14

To Select FSK Modulation ................................................................ 5-14

To Select Carrier Waveform Shape ................................................... 5-14

To Set Carrier Frequency ................................................................ 5-14

To Select Modulating Waveform Source ............................................ 5-15

To Set FSK Rate ............................................................................. 5-16

To Set Hop Frequency .................................................................... 5-16

To Set Modulating Polarity .............................................................. 5-16

PSK ..................................................................................................... 5-17

To Select PSK Modulation ................................................................ 5-17

To Select Carrier Waveform Shape ................................................... 5-17

To Set Carrier Phase ....................................................................... 5-17

To Select Modulating Waveform Source ............................................ 5-18

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To Set PSK Rate ............................................................................ 5-18

To Set PSK Phase........................................................................... 5-19

To Set Modulating Polarity .............................................................. 5-19

BPSK .................................................................................................. 5-20

To Select BPSK Modulation ............................................................. 5-20

To Select Carrier Waveform Shape ................................................... 5-20

To Set Carrier Phase ...................................................................... 5-20

To Select Modulating Waveform Source ............................................ 5-21

To Set BPSK Rate ........................................................................... 5-21

To Set BPSK Phase ......................................................................... 5-22

QPSK .................................................................................................. 5-23

To Select QPSK Modulation ............................................................. 5-23

To Select Carrier Waveform Shape ................................................... 5-23

To Set Carrier Phase ...................................................................... 5-23

To Select Modulating Waveform Source ............................................ 5-24

To Set QPSK Rate .......................................................................... 5-24

To Set QPSK Phases ....................................................................... 5-24

3FSK ................................................................................................... 5-25

To Select 3FSK Modulation .............................................................. 5-25

To Select Carrier Waveform Shape ................................................... 5-25

To Set Carrier Frequency ................................................................ 5-25

Modulation Source ......................................................................... 5-26

To Set 3FSK Rate ........................................................................... 5-26

To Set Hop Frequencies .................................................................. 5-26

4FSK ................................................................................................... 5-27

To Select 4FSK Modulation .............................................................. 5-27

To Select Carrier Waveform Shape ................................................... 5-27

To Set Carrier Frequency ................................................................ 5-27

Modulation Source ......................................................................... 5-28

To Set 4FSK Rate ........................................................................... 5-28

To Set Hop Frequencies .................................................................. 5-28

OSK .................................................................................................... 5-29

To Select OSK Modulation ............................................................... 5-29

To Select Carrier Waveform Shape ................................................... 5-30

To Set Carrier Frequency ................................................................ 5-30

To Select Modulating Waveform Source ............................................ 5-30

To Set OSK Rate ............................................................................ 5-31

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To Set Oscillate Period .................................................................... 5-31

PWM ................................................................................................... 5-32

To Select PWM Modulation .............................................................. 5-32

To Select Carrier Waveform Shape ................................................... 5-32

To Set Pulse Width/Duty Cycle ........................................................ 5-32

To Select Modulating Waveform Source ............................................ 5-33

To Set Modulating Waveform Frequency ........................................... 5-33

To Set Pulse Width/Duty Cycle Deviation .......................................... 5-34

Chapter 6 Sweep ................................................................................ 6-1

To Enable Frequency Sweep ................................................................... 6-2

Start Frequency and End Frequency ........................................................ 6-2

Center Frequency and Frequency Span .................................................... 6-3

Sweep Type .......................................................................................... 6-4

Linear Sweep.................................................................................. 6-4

Log Sweep ..................................................................................... 6-5

Step Sweep .................................................................................... 6-6

Sweep Time .......................................................................................... 6-7

Return Time .......................................................................................... 6-8

Mark Frequency .................................................................................... 6-8

Start Hold ............................................................................................. 6-9

End Hold ............................................................................................. 6-10

Sweep Trigger Source ........................................................................... 6-10

Trigger Output Edge ............................................................................. 6-11

Chapter 7 Burst .................................................................................. 7-1

To Enable Burst Mode ............................................................................ 7-2

Burst Type ............................................................................................ 7-2

N Cycle Burst .................................................................................. 7-2

Infinite Burst .................................................................................. 7-3

Gated Burst .................................................................................... 7-4

Burst Phase .......................................................................................... 7-6

Burst Period .......................................................................................... 7-6

Gated Polarity ....................................................................................... 7-6

Burst Delay ........................................................................................... 7-7

Burst Trigger Source .............................................................................. 7-7

Trigger Output Edge .............................................................................. 7-8

Chapter 8 Counter .............................................................................. 8-1

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To Enable the Counter ............................................................................ 8-2

To Set the Counter ................................................................................. 8-3

Statistic ................................................................................................. 8-5

Chapter 9 Store and Recall ................................................................ 9-1

Storage System Overview ....................................................................... 9-2

To Select File Type ................................................................................. 9-4

To Select Browser Type ........................................................................... 9-5

File Operation ........................................................................................ 9-6

Save ............................................................................................... 9-6

Recall ............................................................................................. 9-8

Copy .............................................................................................. 9-9

Paste .............................................................................................. 9-9

Delete ............................................................................................ 9-9

New Directory ............................................................................... 9-10

Chapter 10 Utility and System Settings ....................................... 10-1

Overview ............................................................................................. 10-2

Channel Setting ................................................................................... 10-3

Sync ............................................................................................. 10-3

Sync Polarity ................................................................................. 10-4

Output Polarity .............................................................................. 10-5

Resistance Setting ......................................................................... 10-5

Noise Setting ................................................................................. 10-6

Noise Scale ................................................................................... 10-6

To Configure the Remote Interface ........................................................ 10-7

LAN Setting ................................................................................... 10-7

To Set USB Device Type ............................................................... 10-11

System Setting ................................................................................... 10-12

Number Format ........................................................................... 10-12

Language ................................................................................... 10-13

Power On Setting......................................................................... 10-13

Power Setting .............................................................................. 10-13

Brightness .................................................................................. 10-14

Beeper ....................................................................................... 10-14

Screen Saver ............................................................................... 10-14

Clock Source ............................................................................... 10-14

System Information ..................................................................... 10-16

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Print .................................................................................................. 10-17

Channel Coupling ............................................................................... 10-18

Channel Copy..................................................................................... 10-21

User-defined Waveform Key ................................................................ 10-22

Restore Default .................................................................................. 10-24

Chapter 11 Remote Control .......................................................... 11-1

Remote Control Overview ...................................................................... 11-2

Remote Control Mode ........................................................................... 11-3

User-defined Programming ............................................................. 11-3

To Use PC Software ........................................................................ 11-7

Chapter 12

Chapter 13

Troubleshooting ......................................................... 12-1

Specifications ............................................................. 13-1

Chapter 14 Appendix .................................................................... 14-1

Appendix A: Options and Accessories ..................................................... 14-1

Appendix B: Warranty ........................................................................... 14-2

Appendix C: Any Comment or Question? ................................................. 14-3

Index ....................................................................................................... 1

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Chapter 1 Quick Start

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Chapter 1 Quick Start

This chapter introduces the front/rear panel, user interface and parameter setting method, as well as announcements during first use of the instrument.

Subjects in this chapter:

 General Inspection

 To Adjust the Supporting Legs

 Dimensions

 Front Panel

 Rear Panel

 To Connect to Power

 User Interface

 Parameter Setting Method

 To Use the Built-In Help

 To Use the Security Lock

 To Use the Rack Mount Kit

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Chapter 1 Quick Start

General Inspection

1. Inspect the shipping container for damage.

If there are damages in the container or foam, keep them until the whole machine and the accessories pass the electrical and mechanical tests.

If your instrument has damaged during shipping, please contact your shipper and carrier for compensation. RIGOL will provide no free repair or replacement.

2. Inspect the instrument.

In case of any mechanical damage or defect, or if the instrument does not operate properly or pass the electrical and mechanical tests, contact your local sales representative of RIGOL.

3. Check the Accessories

If the contents are incomplete or damaged, please contact your local sales representative of RIGOL.

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To Adjust the Supporting Legs

DG4000 allows users to unfold the supporting legs as stands to tilt the generator upwards for easier operation and observation during operation (as shown in Figure

1-1). Users can fold the supporting legs for easier storage or carry when the instrument is not in use (as shown in Figure 1-2).

Figure 1-1 Unfold the Supporting Legs

Supporting Legs

Figure 1-2 Fold the Supporting Legs

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Chapter 1 Quick Start

Dimensions

The appearance and dimensions of DG4000 are as shown in Figure 1-3 and Figure

1-4 and the unit is mm.

Figure 1-3 Front View

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Figure 1-4 Side View

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Front Panel

The front panel of DG4000 is shown below.

18. LCD

17. Shortcuts/Utility

16. Return

Chapter 1 Quick Start

15. Modes

14. Waveforms

13. Direction

Keys

12. Knob

1. Power Key 2. USB Host 3. Menu Softkey

5. CH1 Output

4. Page Up/Down 6. CH1 Sync Output

7. CH2 Output

8. CH2 Sync Output

9. Channels Control

10. Counter

11. Numeric

Keyboard

Figure 1-5 DG4000 Front Panel

1. Power Key

The power softkey is used to turn the generator on or off. When the power softkey is turned off, the generator is in standby mode and the generator is in power-off mode only when the power cable at the rear panel is pulled out.

Users can enable or disable the function of this softkey. When enabled, users need to press this softkey to start the instrument after power-on; when disabled, the instrument starts automatically after power-on.

2. USB Host

Support FAT file format USB storage device. Read the waveform or state files from the USB storage device, or store the current instrument state and edited waveform data into the USB storage device, or store the content currently displayed on the screen in specified picture format (.bmp) in USB storage device.

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3. Menu Softkey

Correspond to the left menus respectively. Press any softkey to activate the corresponding menu.

4. Page Up/Down

Open the previous or next page of the current function menu.

5. CH1 Output

BNC connector with 50Ω nominal output impedance.

When Output1 is enabled (the backlight turns on), this connector output waveform according to the current configuration of CH1.

6. CH1 Sync Output

BNC connector with 50Ωnominal output impedance.

When the sync output of CH1 is enabled, this connector outputs the sync signal corresponding to the current settings of CH1 (refer to the introduction in

Sync).

7. CH2 Output

BNC connector with 50Ωnominal output impedance.

When Output2 is enabled (the backlight turns on), this connector output waveform according to the current configuration of CH2.

8. CH2 Sync Output

BNC connector with 50Ωnominal output impedance.

When the sync output of CH2 is enabled, this connector outputs the sync signal corresponding to the current settings of CH2 (refer to the introduction in

Sync).

9. Channels Control

CH1: used to select CH1. When CH1 is selected (the backlight turns on), users can set the waveform and parameters of CH1.

CH2: used to select CH2. When CH2 is selected (the backlight turns on), users can set the waveform and parameters of CH2.

Trigger1: in sweep or burst mode, it is used to trigger CH1 to generate a

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Chapter 1 Quick Start sweep or burst output manually (only when Output1 is enabled).

Trigger2: in sweep or burst mode, it is used to trigger CH2 to generate a sweep or burst output manually (only when Output2 is enabled).

Output1: enable or disable the output of CH1.

Output2: enable or disable the output of CH2.

CH1 CH2: execute channel copy (refer to the introductions in Channel

Copy).

10. Counter

Press Counter to turn the counter on or off. When the counter is turned on, the backlight of the key is illuminated and the left indicator flickers. If the counter interface is currently displayed, press this key again to disable counter function; if the screen currently displays interfaces other than the counter interface, press this key again to switch to counter interface (refer to the introductions in Counter).

11. Numeric Keyboard

It is used to input parameters and consists of numbers (0 to 9), decimal point

(.), operators (+/-) and buttons (“Enter”, “Cancel” and “Del”). If a negative is required, please input an operator “-” before the numbers. In addition, the decimal point “.” can be used to switch units quickly and the operators “+/-” can be used to switch between uppercase and lowercase (for the use method of the numeric keyboard, refer to the introduction in Parameter Setting

Method).

12. Knob

During parameter setting, it is used to increase (clockwise) or decrease

(counterclockwise) the current highlighted number.

It is used to select file storage location or select the file to be recalled when storing or recalling file.

It is used to switch the character in the soft keyboard when entering filename.

It is used to select built-in waveform when defining the shortcut waveform of

User.

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13. Direction Keys

When using the knob and direction keys to set parameters, the direction keys are used to switch the digits of the number.

During filename input, they are used to move the cursor.

14. Waveforms

Sine----Sine

Generate a Sine waveform with frequency from 1μHz to 160MHz.

 When the function is enabled, the backlight of the button turns on.

 Enable to change Frequency/Period, Amplitude/High Level, Offset/Low

Level and Start Phase of the Sine waveform.

Square----Square

Generate a Square waveform with frequency from 1μHz to 50MHz and variable duty cycle.

 When the function is enabled, the backlight of the button turns on.

 Enable to change Frequency/Period, Amplitude/High Level, Offset/Low

Level, Duty Cycle and Start Phase of the Square waveform.

Ramp----Ramp

Generate a Ramp waveform with frequency from 1μHz to 4MHz and variable symmetry.

 When the function is enabled, the backlight of the button turns on.

 Enable to change Frequency/Period, Amplitude/High Level, Offset/Low

Level, Symmetry and Start Phase of the Ramp waveform.

Pulse----Pulse

Generate a Pulse waveform with frequency from 1μHz to 40MHz and variable pulse width and edge time.

 When the function is enabled, the backlight of the button turns on.

 Enable to change Frequency/Period, Amplitude/High Level, Offset/Low

Level, Pulse Width/Duty Cycle, Leading Edge Time, Trailing Edge Time and

Delay of the Pulse waveform.

Noise----Noise

Generate a Gauss Noise with 120MHz bandwidth.

 When the function is enabled, the backlight of the button turns on.

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 Enable to change Amplitude/High Level and Offset/Low Level of the

Noise.

Arb----Arbitrary Waveforms

Generate an arbitrary waveform with frequency from 1μHz to 40MHz.

 Provide Step-by-Step output mode.

 Generate 150 built-in waveforms: DC, Sinc, Exponential Rise, Exponential

Fall, ECG, Gauss, Haversine, Lorentz, Pulse, Dual-Tone etc.; output arbitrary waveforms stored in USB storage device.

 Generate arbitrary waveforms (16 kpts) edited from the front panel or through PC software and then downloaded to the instrument by the users.

 When the function is enabled, the backlight of the button turns on.

 Enable to change Frequency/Period, Amplitude/High Level, Offset/Low

Level and Start Phase of the arbitrary waveform.

Harmonic——Harmonic

Generate harmonics with frequency from 1μHz to 80MHz.

 Output up to 16 th

order of harmonic.

 Users can set the harmonic “Order”, “Type”, “Ampl” and “Phase”.

User----User-defined Waveform Key

Users can define the built-in waveform frequently used as shortcut (Utility

UserKey). And then, in any operation interface, press User to quickly open the desired waveform and set its parameters.

15. Modes

Mod----Modulation

Generate the modulated waveforms. Provide various analog modulation and digital modulation modes and can generate AM, FM, PM, ASK, FSK, PSK, BPSK,

QPSK, 3FSK, 4FSK, OSK or PWM modulated signal.

 Support internal and external modulations.

Sweep----Sweep

Generate the frequency sweeping signal of Sine, Square, Ramp and Arbitrary

Waveforms (except DC).

 Support three sweep types: Linear, Log and Step.

 Support three trigger sources: Internal, External and Manual.

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 Provide the “Mark” function.

 When the function is enabled, the backlight of the button turns on.

Burst----Burst

Generate burst waveforms of Sine, Square, Ramp, Pulse and Arbitrary waveform (except DC).

 Support three burst types: N Cycle, Infinite and Gated.

 Noise can also be used to generate Gated burst.

 Support three trigger sources: Internal, External and Manual.

 When the function is enabled, the backlight of the button turns on.

Note: when the instrument is working in remote mode, you can return it back to local mode by pressing Burst.

16. Return

This key is used to return to the previous menu.

17. Shortcuts/Utility

Print: used to execute print function. Save the content shown on the screen as image in USB storage device.

Edit: this key is the shortcut of “ArbEdit Wform” and is used to enter the

ArbEdit interface quickly.

Preset: used to return the instrument state to default or user-defined states

(refer to the introduction in Restore Default).

Utility: used to set the system parameters. When this function is enabled, the backlight of the button turns on.

Store: store or recall the instrument state or user-defined arbitrary data.

 Support normal file operations.

 Provide a built-in non-volatile memory (C Disk) and an external USB storage device (D Disk).

 When the function is enabled, the backlight of the button turns on.

Help: to get context help information about any front-panel key or menu softkey, press this key until it is illuminated and then press the desired key.

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18. LCD

800 × 480 TFT color LCD is used to display the current function menu and parameters setting, system state as well as prompt messages.

CAUTION

Overvoltage protection of the output channel will take effect once any of the following conditions is met.

 Amplitude setting in the generator is greater than 4 Vpp; the input voltage is greater than ± 11.25 V (± 0.1 V) and frequency is lower than

10kHz.

 Amplitude setting in the generator is lower than or equal to 4 Vpp; the input voltage is greater than ± 4.5 V (± 0.1 V) and frequency is lower than 10kHz.

 The message “OverLoad protect, The output is off!” will appear on the screen when overvoltage protection takes effect.

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Rear Panel

The rear panel of DG4000 is as shown in the figure below.

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8. 7. 6. 5. 4. 3. 2. 1.

Figure 1-6 DG4000 Rear Panel

1. AC Power Input

This generator can accept AC power supply of 100-240V, 45-440Hz.

Power Fuse: 250V, T2 A.

2. LAN

Connect the generator to the local area network for remote control through this interface. This generator conforms to LXI-C instrument standards and can quickly build test system with other devices to easily realize system integration.

3. Security Lock Hole

Users can use the security lock (buy it by themselves) to lock the instrument at a fixed location.

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4. USB Device

PC can be connected through this interface to control the generator remotely through PC software.

5. 10MHz In/Out

BNC female connector with 50Ω nominal impedance. The function of this connector is determined by the type of clock used by the generator. DG4000 can use internal or external clock (refer to the introduction in Clock Source ).

 When internal clock source is used, the connector (used as 10MHz Out) can output 10MHz clock signal generated by the internal crystal oscillator of the generator.

 When external clock source is used, the connector (used as 10MHz In) accepts a 10MHz external clock signal.

 This connector is usually used to synchronize multiple instruments (refer to the introduction in Sync).

6. CH1: Mod/FSK/Trig

BNC female connector with 50Ω nominal impedance. Its function is determined by the current working mode of CH1.

Mod:

If AM, FM, PM, PWM or OSK is enabled for CH1 and external modulation source is used, this connector accepts an external modulation signal.

FSK:

If ASK, FSK or PSK is enabled for CH1 and external modulation source is used, this connector accepts an external modulation signal (users can set the polarity of the signal).

Trig In

If CH1 is in sweep or burst mode and external trigger source is used, this connector accepts an external trigger signal (users can set the polarity of the signal).

Trig Out

If CH1 is in sweep or burst mode and internal or manual trigger source is used, this connector outputs a trigger signal with specified edge.

7. CH2: Mod/FSK/Trig

BNC female connector with 50Ω nominal impedance. Its function is determined by the current working mode of CH2.

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Mod:

If AM, FM, PM, PWM or OSK is enabled for CH2 and external modulation source is used, this connector accepts an external modulation signal.

FSK

If ASK, FSK or PSK is enabled for CH2 and external modulation source is used, this connector accepts an external modulation signal (users can set the polarity of the signal).

Trig In:

If CH2 is in sweep or burst mode and external trigger source is used, this connector accepts an external trigger signal (users can set the polarity of the signal).

Trig Out:

If CH2 is in sweep or burst mode and internal or manual trigger source is used, this connector outputs a trigger signal with specified edge.

8. External Signal Input (Counter)

BNC female connector with 50Ω nominal impedance. It is used to accept an external signal to be measured by the counter.

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To Connect to Power

DG4000 accepts AC power supply: 100 to 240V, 45Hz to 440Hz. Please use the power cable provided in the accessories to connect the instrument to AC power (as shown in Figure 1-7). At this point, the generator is powered on and the power button at the lower-left corner of the front panel is in breathing state.

Figure 1-7 To Connect to Power

CAUTION

If the power fuse needs to be changed, please return the instrument back to our factory and the RIGOL authorized operator will change it for you.

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User Interface

DG4000 user interface displays the parameters and waveforms of the two channels at the same time. The figure below is the interface when both CH1 and

CH2 select Sine. Different contents will be displayed when different functions are enabled.

4. Channel Configuration 3. Channel State

2. Status Bar 1. Current

Function

5. Frequency

6. Amplitude

7. Offset

8. Phase

9. Waveform

10. Counter

11. Menu

12. Menu Page Number

Figure 1-8 User Interface

1. Current Function

Display the name of the function currently selected. For example, “Sine” indicates that “Sine” waveform function is currently selected and “ArbEdit” indicates that “Arbitrary Waveform Edit” function is currently selected.

2. Status Bar

The following indicators would be displayed according to the current configuration.

When the instrument is connected into LAN successfully, this indicator will light.

When the generator works in remote mode, this indicator will light.

When the generator detects connected USB storage device, this indicator will light.

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3. Channel Status

Display areas of CH1 and CH2. Indicate whether the channel is selected and turned on (ON/OFF).The area of the channel currently selected is highlighted and the on/off state of the channel currently turned on is “ON”.

Note:

When a channel is “Selected”, it does not mean that the channel is turned on.

When CH1 is selected, users can configure the parameters of CH1 and the backlight of CH1 turns on. When CH1 is turned on, CH1 can output waveform according to the current configuration and the backlight of Output1 turns on.

4. Channel Configurations

Display the current output configuration in each channel, including output resistance, mode and type of modulating source or trigger source.

Output Resistance

High Impedance: display “HighZ”

Load: display the resistance value, the default is “50Ω”

Mode

Modulation: display “Mod”

Sweep: display “Sweep”

Burst: display “Burst”

Modulating/Trigger Source Type

Internal modulating/trigger: display “Internal”

External modulating/trigger: display “External”

Manual Trigger: display “Manual”

5. Frequency

Display the current waveform frequency in each channel. Press the corresponding softkey Freq and use the numeric keyboard or direction keys and knob to modify this parameter. The parameter that can be modified currently will be highlighted and the lightspot above the number indicates current cursor location.

6. Amplitude

Display the current waveform amplitude in each channel. Press the corresponding softkey Ampl and use the numeric keyboard or direction keys and knob to modify this parameter. The parameter that can be modified

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7. Offset

Display the current waveform DC offset in each channel. Press the corresponding softkey Offset and use the numeric keyboard or direction keys and knob to modify this parameter. The parameter that can be modified currently will be highlighted and the lightspot above the number indicates current cursor location.

8. Phase

Display the current waveform phase in each channel. Press the corresponding softkey Start Phase and use the numeric keyboard or direction keys and knob to modify this parameter. The parameter that can be modified currently will be highlighted and the lightspot above the number indicates current cursor location.

9. Waveform

Display the currently selected waveform shape in each channel.

10. Counter

Only available when the counter is turned on and can display the current measurement state of the counter briefly or in detail.

 Brief: only display frequency, period and the number of measurements performed.

 Detail: display the configurations of the counter, five measurement values

(Frequency, Period, Duty Cycle, Positive Pulse Width and Negative Pulse

Width) and the number of measurements performed.

11. Menu

Display the operation menu corresponding to the function currently selected.

For example, the “Sine” function menu is displayed in the above figure.

12. Menu Page Number

Display the total number of pages and the current page number of the menu, such as “1 of 1” or “1 of 2”.

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Parameter Setting Method

Users can use the numeric keyboard or knob and direction keys to set parameters.

Numeric Keyboard

The numeric keyboard consists of:

Number Keys

The 0 to 9 number keys are used to directly input the desired parameter value.

Decimal Point

Press this key to insert a decimal point “.” at the current position of the cursor.

Operator Key

The operator key “+/-” is used to modify the operator of the parameter. Press this key to set the parameter operator to “-”; press this key again to switch the operator to “+”. Note that the operator key is used to switch between uppercase and lowercase in filename edit.

Enter Key

Press this key to finish parameter input and add the default unit for the parameter.

Cancel Key

(1) During parameter input, press this key to clear the input in the active function area and exit parameter input.

(2) Turn the display in the active function area off.

Del Key

(1) During parameter input, press this key to delete the character at the left of the cursor.

(2) During filename edit, press this key to delete the characters input.

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Direction keys and Knob

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Functions of the direction keys:

1. During parameter input, use the direction keys to move the cursor to select the digit to be edited.

2. During filename edit, use the direction keys to move the cursor.

Functions of the knob:

 When the parameter is in editable state, turn the knob to increase (clockwise) or reduce (counterclockwise) the parameter with specified step.

 During filename edit, use the knob to select the characters in the soft keyboard.

 In Arb Select WformBuiltIn and Utility UserKey, use the knob to select arbitrary waveform.

 In store and recall, use the knob to select the storage location of the file or to select the file to be recalled.

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To Use the Built-In Help

To get context help information about any front-panel key or menu softkey, press

Help to illuminate the key and then press the desired key to get corresponding help.

Pressing Help twice will get the following common help.

1. View the last displayed message.

2. View error queue of the remote commands.

3. Get the help information of a key.

4. Generate a basic waveform.

5. Generate an arbitrary waveform.

6. Generate a modulated waveform.

7. Generate a frequency Sweep.

8. Generate a Burst waveform.

9. Storage management.

10. Synchronize multiple Generators.

11. Get technical support from RIGOL.

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To Use the Security Lock

Use the security lock (option) to lock the generator at a fixed location. As shown in the figure below, align the lock with the lock hole and plug it into the lock hole vertically, turn the key clockwise to lock the instrument and then pull the key out.

Security Lock Hole

Figure 1-9 Security Lock Hole

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To Use the Rack Mount Kit

This instrument can be installed into a standard 19 inches cabinet.

Figure 1-10 Rack Mount Kit

Kit Parts List

The part list of the rack mount kit (as shown in Figure 1-10) of DG4000 is as shown in the table below. Wherein, the “No.” column corresponds to Figure 1-11 and

Figure 1-12.

Table 1-1 Kit Parts List

No. Name Qty Part No. Description

1-1 Front Panel 1

1-2 Support Board 1

1-3 Left Plate 1

1-4 Right Plate 1

1-5 Pressure Feet 2

RM-DG4-01

RM-DG4-02

RM-DG4-03

RM-DG4-04

RM-DG4-05

1-6 Built-in Fitting 2

2-1 M4 Screw 18

RM-DG4-06

RM-SCREW-01 M4 x 6 Phil-Slot Pan Head Machine

Screw Nail

2-2 M6 Screw 4

2-3 M6 Screw 4

RM-SCREW-02 M6 x 20 Phil-Slot Pan Head Machine

Screw Nail

RM-SCREW-03 M6 x 4 Square Machine Female

Screw Contain Lock Blade

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Figure 1-11 Parts of Rack Mount Kit

2-1 2-2 2-3

Figure 1-12 Screws and Nuts

Installation Tool

PH2 Phillips Screwdriver (recommended).

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Installation Space

The following requirements must be fulfilled by the machine cabinet in which the instrument is mounted.

 The machine cabinet must be a standard 19-inch one.

 At least 4U (177.8 mm) space should be provided by the machine cabinet.

 The depth inside the machine cabinet should not be less than 180 mm.

The dimension of the instrument after being installed is as shown below.

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Installation Procedure

Only authorized operators can execute the installation operation. Improper installation might result in damage of the instrument or incorrect installation of the instrument on the rack.

1. Install the right and left plates: align the detents of the right and left plates with the openings on the support board and insert them into the support board respectively, then fix them with four M4 screws.

2. Install the front panel of the rack mount kit: fix the front panel onto the frame installed in the previous step using six M4 screws.

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3. Fix the bottom of the instrument: fix the instrument onto the support board using two pressure feet and four M4 screws.

4. Fix the top of the instrument: fix the top of the instrument using two built-in fittings and four M4 screws.

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5. Load into the machine cabinet: mount the rack with the instrument fixed to it into a standard 19-inch machine cabinet with four M6 screws and four M6 square nuts.

6. Post-installation notice: the rack occupies a height of 4U. The holes pointed out by the arrows are installation holes. Note that they should be aligned with during installation.

DG4000 Series User’s Guide

Chapter 2 Basic Waveform Output

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Chapter 2 Basic Waveform Output

DG4000 can output basic waveforms (including Sine, Square, Ramp, Pulse and

Noise) from one of the channels separately or from the two channels at the same time. At start-up, the instrument outputs a sine waveform with 1kHz frequency and 5Vpp amplitude by default. This chapter introduces how to configure the instrument to output various basic waveforms.

Subjects in this chapter:

 To Select Output Channel

 To Select Basic Waveform

 To Set Frequency

 To Set Amplitude

 To Set DC Offset Voltage

 To Set Start Phase

 Align Phase

 To Set Duty Cycle

 To Set Symmetry

 To Set Parameters for Pulse

 To Enable Output

 Basic Waveform Output Example

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To Select Output Channel

Users can configure DG4000 to output basic waveform from a single channel or from dual channels at the same time. Please select the desired channel before configuring waveform parameters. At start-up, CH1 is selected by default.

Press CH1 or CH2 at the front panel and the corresponding area in the user interface is illuminated. At this point, users can configure the waveform and parameters of the channel selected.

Note: CH1 and CH2 can not be selected at the same time. Users can first select

CH1 and then select CH2 after configuring the waveform and parameters of CH1.

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To Select Basic Waveform

DG4000 can output 5 kinds of basic waveforms including Sine, Square, Ramp,

Pulse and Noise. At start-up, Sine is selected by default.

1. Sine

Press Sine at the front panel to select sine waveform and the backlight of the button turns on. At this point, “Sine” and the parameter setting menu of sine waveform are displayed on the right of the user interface.

2. Square

Press Square at the front panel to select square waveform and the backlight of the button turns on. At this point, “Square” and the parameter setting menu of square waveform are displayed on the right of the user interface.

3. Ramp

Press Ramp at the front panel to select ramp waveform and the backlight of the button turns on. At this point, “Ramp” and the parameter setting menu of ramp waveform are displayed on the right of the user interface.

4. Pulse

Press Pulse at the front panel to select pulse and the backlight of the button turns on. At this point, “Pulse” and the parameter setting menu of pulse are displayed on the right of the user interface.

5. Noise

Press Noise at the front panel to select noise and the backlight of the button turns on. At this point, “Noise” and the parameter setting menu of noise are displayed on the right of the user interface.

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To Set Frequency

Frequency is one of the most important parameters of basic waveforms. For different instrument models and different waveforms, the setting ranges of frequency are different. For detailed information, please refer to “Frequency

Characteristics” in Specifications. The default frequency is 1kHz.

The frequency displayed on the screen is the default value or the frequency previously set. When the instrument function is changed, if this frequency is valid under the new function, the instrument will still use this frequency; otherwise, the instrument would display prompt message and set the frequency to the frequency upper limit of the new function automatically.

Press Freq/Period to highlight “Freq”. At this point, use the numeric keyboard or direction keys and knob to input the frequency value. Then, select the desired unit from the pop-up menu.

 For the input method of frequency value, refer to the introduction in

Parameter Setting Method.

 The frequency units available are MHz, kHz, Hz, mHz and μHz.

 Press this softkey again to switch to period setting. At this point, “Period” is highlighted.

 The period units available are sec, msec, μsec and nsec.

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To Set Amplitude

The amplitude range is limited by the “Resistance” and “Freq/Period” settings.

Please refer to “Output Characteristics” in Specifications. The default value is

5Vpp.

The amplitude displayed on the screen is the default value or the amplitude previously set. When the instrument configuration (such as frequency) is changed, if this amplitude is valid, the instrument will still use this amplitude; otherwise, the instrument would display prompt message and set the amplitude to the amplitude upper limit of the new configuration automatically. Users can also use “High Level” or “Low Level” to set the amplitude.

Press Ampl/HiLevel to highlight “Ampl”, and then use the numeric keyboard or direction keys and knob to input the amplitude value. Then, select the desired unit from the pop-up menu.

 For the input method of amplitude value, refer to the introduction in

Parameter Setting Method.

 The amplitude units available are Vpp, mVpp, Vrms, mVrms and dBm (valid in

HighZ).

 Press this softkey again to switch to high level setting. At this point, “HiLevel” is highlighted.

 The high level units available are V and mV.

Unit Switch

Vpp is the unit for signal peak-peak value and Vrms is the unit for signal effective value. The default unit is Vpp. Users can quickly switch the current amplitude unit from the front panel.

For different waveforms, the relations between Vpp and Vrms are different.

The relation of the two units is as shown in the figure below (take sine waveform as an example).

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Vamp

Vrms=0.707Vamp

Vpp=2Vamp

According to the figure above, the conversion relation between Vpp and

Vrms fulfills the following equation:

Vpp

2 2

Vrms

For example, to convert 2Vpp to the corresponding value in Vrms, press · in the numeric keyboard and select Vrms menu. For sine waveform, the converted value is 707.2mVrms.

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To Set DC Offset Voltage

The offset range is limited by the “Resistance” and “Ampl/HiLevel” settings.

Please refer to the “Output Characteristics” in Specifications. The default value is

0V

DC

.

The DC offset voltage displayed on the screen is the default value or the offset previously set. When the instrument configuration (such as resistance) is changed, if this offset is valid, the instrument will still use this offset; otherwise, the instrument would display prompt message and set the offset to the offset upper limit of the new configuration automatically.

Press Offset/LoLevel to highlight “Offset”, and then use the numeric keyboard or direction keys and knob to input the offset value. Then, select the desired unit from the pop-up menu.

 For the input method of offset value, refer to the introduction in Parameter

Setting Method.

 The DC offset voltage units available are V

DC

and mV

DC

.

 Press this softkey again to switch to low level setting. At this point, “LoLevel” is highlighted.

 The low level units available are V and mV.

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To Set Start Phase

The setting range of start phase is from 0° to 360° and the default is 0°.

The start phase displayed on the screen is the default value or the phase previously set. When the instrument function is changed, the new function will still use this phase.

Press Start Phase to highlight the softkey, and then use the numeric keyboard or direction keys and knob to input the start phase value. Then, select the unit “°” from the pop-up menu. For the input method of phase value, refer to the introduction in Parameter Setting Method.

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Align Phase

DG4000 series dual-channel generators enable to align the phases of the two channels. Pressing down this softkey will re-configure the two channels, and enable the generator to output with specified frequency and start phase.

For two signals whose frequencies are the same or in multiple, this operation will align their phases. For example, assume a sine waveform (1kHz, 5Vpp, 0 °) is output from CH1, while another (1kHz, 5Vpp, 180°) from CH2. Use an oscilloscope to sample and display the two signals, and then toggle the channel output switch of the generator, you will see that the waveforms shown on the oscilloscope do not always have a phase deviation of 180°. At this point, press Align Phase on the generator and the waveforms shown on the oscilloscope will have a phase deviation of 180° without any adjustment of the start phase of the generator.

CH1

CH2

Figure 2-1 Before Aligning Phase

CH1

CH2

Figure 2-2 After Aligning Phase

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Note: the Align Phase menu is grayed out and disabled when one of the two channels is in modulation mode.

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To Set Duty Cycle

Duty Cycle is defined as the percentage that the high level takes up in the whole period as shown in the figure below. This parameter is only available when square waveform is selected.

t

Duty Cycle=t/T*100%

T

The duty cycle range is limited by the “Freq/Period” setting. Please refer to

“Signal Characteristics” in Specifications. The default value is 50%.

Press Duty Cycle to highlight the softkey, and then use the numeric keyboard or direction keys and knob to input the duty cycle value. Then, select the unit “%” from the pop-up menu. For the input method of duty cycle value, refer to the introduction in Parameter Setting Method.

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To Set Symmetry

Symmetry is defined as the percentage that the rising period takes up in the whole period as shown in the figure below. This parameter is only available when ramp is selected.

t Symmetry=t/T*100%

T

The setting range of symmetry is from 0% to 100% and the default is 50%.

Press Symmetry to highlight the softkey, and then use the numeric keyboard or direction keys and knob to input the symmetry value. Then, select the unit “%” from the pop-up menu. For the input method of symmetry value, refer to the introduction in Parameter Setting Method.

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To Set Parameters for Pulse

To output a pulse, users need to set the “Pulse Width/Duty Cycle”, “Leading edge”,

“Trailing edge”, “Delay” and “Recover Delay” in addition to the basic parameters

(such as frequency, amplitude, DC offset voltage, start phase, high level, low level and align phase) introduced above. t

Rise t

Fall

90%

50%

脉宽

Pulse Period

10%

Pulse Width/Duty Cycle

Pulse Width is defined as the time from the 50% threshold of a rising edge amplitude to the 50% threshold of the next falling edge amplitude as shown in the figure above.

Pulse Width range is limited by the Minimum Pulse Width” and the “Pulse

Period” (for the ranges of “Minumum Pulse Width” and “Pulse Period”, please refer to “Signal Characteristics” in Specifications). The default value is 500μs.

 Pulse Width ≥ Minimum Pulse Width

 Pulse Width ≤ Pulse Period - Minimum Pulse Width × 2

Pulse Duty Cycle is defined as the percentage that the Pulse Width takes up in the whole period.

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Pulse Width and Duty Cycle are correlative. Once a parameter is changed, the other will be automatically changed. Pulse Duty Cycle is limited by the “Minimum

Pulse Width” and the “Pulse Period”.

 Pulse Duty Cycle ≥ 100 × Minimum Pulse Width ÷ Pulse Period

 Pulse Duty Cycle ≤ 100 × (1 - 2 × Minimum Pulse Width ÷ Pulse Period)

Press Width/Duty to highlight “Width”, and use the numeric keyboard or direction keys and knob to input the desired value. Then, select the desired unit from the pop-up menu.

 For the input method of the value, refer to the introduction in Parameter

Setting Method.

 Selectable Pulse Width units: sec, msec, μsec, nsec.

 Press this softkey again to switch to duty cycle setting (at this point, it is set to

20% automatically).

Leading/Trailing Edge Time

The Leading (rising) edge time is defined as the duration of the pulse amplitude rising from 10% to 90% threshold, while the Trailing (falling) edge time is defined as the duration of the pulse amplitude moving down from 90% to 10% threshold as shown in the figure above.

The range of leading/trailing edge time is limited by the currently specified pulse width limit as shown in the formula below. DG4000 will automatically adjust the edge time to match the specified pulse width if the value currently set exceeds the limit value.

Leading/Trailing Edge Time ≤ 0.625 × Pulse Width

Press Leading (or Trailing) to highlight the softkey. Use the numeric keyboard or direction keys and knob to input the desired value and select the desired unit from the pop-up menu.

 For the input method of the value, refer to the introduction in Parameter

Setting Method.

 Selectable Leading/Trailing Edge Time units: sec, msec, μsec, nsec.

 Leading edge time and trailing edge time are independent from each other and users can set them separately.

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Delay

Delay is defined as the delayed time of the output of a channel relative to the output of the other channel. The range of delay is from 0s to pulse period and the default is 0s.

CH1 Output

CH2 Output

Delay

Press Delay to highlight the softkey. Use the numeric keyboard or direction keys and knob to input the desired value and select the desired unit from the pop-up menu.

 For the input method of the value, refer to the introduction in Parameter

Setting Method.

 Selectable Delay Time units: sec, msec, μsec, nsec.

Recover Delay

Press Pulse, then use to open the 2/2 menu page and press Restore, the generator will align the delay between the two channels. Assume that CH1 and CH2 output pulse waveforms with the same parameters. Use the oscilloscope to sample the waveforms of the two channels and display them stably. Then, toggle the output switch of the generator. The two waveforms displayed on the oscilloscope have a certain delay. At this point, press Restore on the generator and the waveforms will be displayed on the oscilloscope without any delay.

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Chapter 2 Basic Waveform Output

CH1

CH2

Figure 2-3 Before Restore

CH1

CH2

Figure 2-4 After Restore

Note that Restore is grayed out and disabled if any of the two channels is in modulation mode.

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To Enable Output

After configuring the parameters of the waveform selected, waveform output could be enabled.

Note: before enabling waveform output, you can also configure parameters (such as Resistance and Polarity) related to the channel output through “CH1/CH2Set” menu in Utility. For details, please refer to the introduction in Channel Setting.

Press Output1 or/and Output2 at the front panel and the backlight of the button turns on. The instrument outputs the configured waveform from the [Output1] or/and [Output2] connector at the front panel.

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Basic Waveform Output Example

Configure the generator to output a pulse waveform with 1.5MHz frequency,

500mVpp amplitude, 5mV

DC

DC offset, 200ns pulse width, 75ns leading (rising) edge time, 100ns trailing (falling) edge time and 5ns delay.

1. Press CH1 at the front panel and the backlight turns on, indicating that CH1 is selected.

2. Press Pulse at the front panel and the backlight turns on, indicating that

Pulse waveform is selected.

3. Press Freq/Period to highlight “Freq”. The lightspot above the number indicates current cursor location (as shown in the figure below). Use the numeric keyboard or direction keys and knob to input the frequency value

“1.5” and select the unit “MHz” from the pop-up menu.

Figure 2-5 To Set Waveform Parameters

4. Press Ampl/HiLevel to highlight “Ampl”. The lightspot above the number indicates current cursor location. Use the numeric keyboard or direction keys and knob to input the amplitude value “500” and select the unit “mVpp” from the pop-up menu.

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5. Press Offset/LoLevel to highlight “Offset”. The lightspot above the number indicates current cursor location. Use the numeric keyboard or direction keys and knob to input the offset value “5” and select the unit “mV

DC

” from the pop-up menu.

6. Press Width/Duty to highlight “Width”. The lightspot above the number indicates current cursor location. Use the numeric keyboard or direction keys and knob to input “200” and select the unit “nsec” from the pop-up menu. At this point, the pulse duty cycle changes accordingly.

7. Press Leading to highlight it. The lightspot above the number indicates current cursor location. Use the numeric keyboard or direction keys and knob to input “75” and select the unit “nsec” from the pop-up menu. Press Trailing to highlight it. The lightspot above the number indicates current cursor location. Use the numeric keyboard or direction keys and knob to input “100” and select the unit “nsec” from the pop-up menu.

8. Press Delay to highlight it. The lightspot above the number indicates current cursor location. Use the numeric keyboard or direction keys and knob to input

“5” and select the unit “nsec” from the pop-up menu.

9. Press Output1 at the front panel to turn CH1 output on. At this point, CH1 outputs waveform with the specified parameters. Connect the output terminal of CH1 to the oscilloscope and the waveform is as shown in the figure below.

Figure 2-6 To Output Pulse Waveform

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Chapter 3 Arbitrary Waveform Output

DG4000 provides 150 kinds of built-in arbitrary waveforms stored in non-volatile memory and allows users to store 10 user-defined arbitrary waveforms in non-volatile memory and 1 user-defined arbitrary waveform in volatile memory.

Users can also store the user-defined arbitrary waveform in external memory

(such as USB storage device). User-defined waveforms can contain 1 (DC voltage) to 16384 (16K) data points, namely 1pts to 16kpts.

DG4000 can output the built-in and user-defined arbitrary waveforms from a single channel or from two channels at the same time. This chapter introduces how to configure the generator to output arbitrary waveforms.

Subjects in this chapter:

 To Enable Arbitrary Waveform

 Step-By-Step Output Mode

 To Select Arbitrary Waveform

 To Create New Arbitrary Waveform

 To Edit Arbitrary Waveform

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To Enable Arbitrary Waveform

Press Arb to enable arbitrary waveform function and open the operation menu of arbitrary waveform.

1. Freq/Period: set the output “Frequency/Period” of the arbitrary waveform.

2. Ampl/HiLevel: set the output “Amplitude/High Level” of the arbitrary waveform.

3. Offset/LoLevel: set the output “Offset/Low Level” of the arbitrary waveform.

4. Phase: set the “Start Phase” of the arbitrary waveform.

5. Align Phase: refer to Align Phase.

6. Step-By-Step: enable the step-by-step output mode of arbitrary waveform.

7. Select Wform: select arbitrary waveform stored in internal or external memory.

8. Create New: users can define waveform with up to 16 kpts.

9. Edit Wform: edit the stored arbitrary waveform.

Refer to Basic Waveform Output to configure the parameters and output. This chapter will focus on “Step-By-Step”, “Select Waveform”, “Create New” and “Edit

Waveform”.

Tip

Users can also press User at the front panel to quickly set arbitrary waveform parameters including frequency/period, amplitude/high level, offset/low level, start phase and align phase. At this point, the waveform output is the waveform defined in Utility UserKey (refer to introduction in User-defined

Waveform Key).

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Step-By-Step Output Mode

DG4000 supports step-by-step output of arbitrary waveform. Press Arb to open the arbitrary waveform setting menu and press Step-By-Step to enable the step-by-step output mode of arbitrary waveform.

In step-by-step output mode, the generator calculates the frequency

(30.517578125kHz) of the output signal automatically according to the wave table length (16,384) and sample rate. The generator outputs waveform points one by one at this fixed frequency. Step-by-step output mode can prevent the loss of important waveform points.

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To Select Arbitrary Waveform

DG4000 allows users to select arbitrary waveforms stored in internal or external memory for output. Press Arb, use to open the 2/2 menu page, and then press

Select Wform to select “Builtin”, “Stored Wforms” or “Volatile Wform” for arbitrary waveform output.

Built-In Waveform

Select from the 150 kinds of built-in arbitrary waveforms of DG4000 as shown in the table below. Press BuiltIn and select a kind (“Common”, “Project”, “SectMod,

“Bioelect”, “Medical”, “Standard”, “Maths”, “Trigonome”, “Anti Trigonome” or

“Window”); the corresponding waveforms are displayed on the interface; use the knob to select the desired waveform; use to open the 2/2 menu page and press Select to select the specified waveform.

Table 3-1 Built-in Waveform Table

Name Explanation

Common

DC

AbsSine

DC signal

Absolute value of a Sine

AbsSineHalf

AmpALT

AttALT

GaussPulse

NegRamp

NPulse

PPulse

SineTra

SineVer

StairDn

StairUD

StairUp

Trapezia

Project

Absolute value of half a Sine

Gain oscillation curve

Attenuation oscillation curve

Gauss pulse

Negative ramp

Negative pulse

Positive pulse

Sine-Tra waveform

Sine-Ver waveform

Stair-down waveform

Stair-up and stair-down waveform

Stair-up waveform

Trapezoid waveform

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BandLimited

BlaseiWave

Butterworth

Chebyshev1

Chebyshev2

Combin

CPulse

CWPulse

DampedOsc

DualTone

Gamma

GateVibar

LFMPulse

MCNoise

Discharge

Pahcur

Quake

Radar

Ripple

RoundHalf

RoundsPM

StepResp

SwingOsc

TV

Voice

Surge

Sec-Mod

AM

FM

PFM

PM

PWM

Bioelect

Cardiac

EOG

EEG

Chapter 3 Arbitrary Waveform Output

Bandwidth-limited signal

Time-velocity curve of explosive vibration

Butterworth filter

Chebyshev1 filter

Chebyshev2 filter

Combination function

C pulse

CW pulse

Time-displacement curve of damped oscillation

Dual-tone signal

Gamma signal

Gate self-oscillation signal

Linear FM pulse

Mechanical construction noise

Discharge curve of Ni-MH battery

Current waveform of DC brushless motor

Analog quake waveform

Analog radar waveform

Ripple wave of battery

RoundHalf wave

RoundsPM waveform

Step-response signal

Kinetic energy- time curve of swing oscillation

TV signal

Voice signal

Surge signal

Sectioned sine AM signal

Sectioned sine FM signal

Sectioned pulse FM signal

Sectioned sine PM signal

Sectioned PWM signal

Cardiac signal

Electro-Oculogram

Electroencephalogram

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Airy

Besselj

Bessely

Cauchy

Cubic

Dirichlet

Erf

Erfc

ErfcInv

ErfInv

ExpFall

ExpRise

Gauss

HaverSine

EMG

Pulseilogram

ResSpeed

Medical

LFPulse

Tens1

Tens2

Tens3

Standard

Ignition

ISO16750-2 SP

ISO16750-2 VR

ISO7637-2 TP1

ISO7637-2 TP2A

ISO7637-2 TP2B

ISO7637-2 TP3A

ISO7637-2 TP3B

ISO7637-2 TP4

ISO7637-2 TP5A

ISO7637-2 TP5B

SCR

Math

Electromyogram

Pulsilogram

Speed curve of the respiration

Chapter 3 Arbitrary Waveform Output

Waveform of the low frequency pulse electrotherapy

Waveform 1 of the nerve stimulation electrotherapy

Waveform 2 of the nerve stimulation electrotherapy

Waveform 3 of the nerve stimulation electrotherapy

Ignition waveform of the automotive motor

Automotive starting profile with ringing

Automotive supply voltage profile for resetting

Automotive transients due to disconnects

Automotive transients due to inductance in wiring

Automotive transients due ignition switching off

Automotive transients due to switching

Automotive transients due to switching

Automotive supply profile during starting

Automotive transients due to battery disconnect

Automotive transients due to battery disconnect

SCR firing profile

Airy function

BesselI function

BesselII function

Cauchy distribution function

Cubic function

Dirichlet function

Error function

Complementary error function

Inverted complementary error function

Inverted error function

Exponential fall function

Exponential rise function

Gauss distribution

HaverSine function

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Laguerre

Laplace

Legend

Log

LogNormal

Lorentz

Maxwell

Rayleigh

Versiera

Weibull

ARB_X2

Trigonome

CosH

CosInt

Cot

CotHCon

CotHPro

CscCon

CscPro

CscHCon

CscHPro

RecipCon

RecipPro

SecCon

SecPro

SecH

Sinc

SinH

SinInt

Sqrt

Tan

TanH

Anti Trigonome

Acos

ACosH

ACotCon

4-times Laguerre polynomial

Laplace distribution

5-times Legend polynomial

Logarithm function with the base 10

Logarithmic Gaussian distribution

Lorentz function

Maxwell distribution

Rayleigh distribution

Versiera

Weibull distribution

Square function

Hyperbolic cosine

Integral cosine

Cotangent

Concave hyperbolic cotangent

Protuberant hyperbolic cotangent

Concave cosecant

Protuberant cosecant

Concave hyperbolic cosecant

Protuberant hyperbolic cosecant

Concave reciprocal

Protuberant reciprocal

Concave secant

Protuberant secant

Hyperbolic secant

Sinc function

Hyperbolic sine

Integral sine

Square root

Tangent

Hyperbolic tangent

Arc cosine

Arc hyperbolic cosine

Concave arc cotangent

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FlattopWin

Hamming

Hanning

Kaiser

NuttallWin

ParzenWin

TaylorWin

Triang

TukeyWin

ACotPro

ACotHCon

ACotHPro

ACscCon

ACscPro

ACscHCon

ACscHPro

ASecCon

ASecPro

ASecH

Asin

ASinH

Atan

ATanH

Window

Bartlett

BarthannWin

Blackman

BlackmanH

BohmanWin

Boxcar

ChebWin

Chapter 3 Arbitrary Waveform Output

Protuberant arc cotangen

Concave arc hyperbolic cotangent

Protuberant arc hyperbolic cotangent

Concave arc cosecant

Protuberant arc cosecant

Concave arc hyperbolic cosecant

Protuberant arc hyperbolic cosecant

Concave arc secant

Protuberant arc secant

Arc hyperbolic secant

Arc Sinc

Arc hyperbolic sine

Arc tangent

Arc hyperbolic tangent

Bartlett window

Modified Bartlett-Hann window

Blackman window

BlackmanH window

Bohman window

Rectangle window

Chebyshev window

Flat Top weighted window

Hamming window

Hanning window

Kaiser window

Nuttall-defined minimum 4-term Blackman-Harris window

Parzen window

Taylor window

Triangle window (Fejer window)

Tukey (tapered cosine) window

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Stored Waveform

Select arbitrary waveforms stored in internal non-volatile memory (C Disk) or external memory (D Disk). Press this softkey to enter the Store/Recall Interface and the Store key at the front panel is illuminated. Please select and read the desired arbitrary waveform file. For more details, please refer to Store and

Recall. Waveform data in volatile memory will be changed after the file is read. To return to arbitrary waveform setting interface, press Arb.

Volatile Waveform

Select arbitrary waveform currently stored in the volatile memory. Note that this menu would be unavailable if there is no waveform data in volatile memory currently. To fill up the volatile memory, you can create a waveform through

Create New” or select a waveform from “Built-In” or “Stored Wforms”.

When “Volatile Wforms” is selected, users can edit the volatile waveform using the

Edit Wfrom menu. The new waveform data will overwrite the previous data in the volatile memory. You can also save the new volatile waveform in non-volatile memory.

Note: only when Output1 or/and Output2 is pressed and the backlight of the button turns on, can the instrument output the specified arbitrary waveform from the corresponding output terminal.

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To Create New Arbitrary Waveform

Press Arb, use to open the 2/2 menu page, and then press Create New to open the arbitrary waveform creation interface.

1. Cycle Period

Press this softkey and use the numeric keyboard or direction keys and knob to set the cycle period of the new waveform. Cycle period is the boundary time of the waveform and the range is from 25.0ns to 1Ms.

Note that the time of the last point that can be defined should be lower than the cycle period.

2. High VLimit

Press this softkey and use the numeric keyboard or direction keys and knob to set the level upper limit of the new waveform. The level upper limit is the maximum voltage that can be set during waveform edit. The level upper limit must be greater than the “Low VLimit” currently set and lower than or equal to +5V (50Ω).

3. Low VLimit

Press this softkey and use the numeric keyboard or direction keys and knob to set the level lower limit of the new waveform. The level lower limit is the minimum voltage that can be set during waveform edit. The level lower limit must be greater than or equal to -5V (50Ω) and lower than the “High VLimit” currently set.

4. Init #Points

When creating a new waveform, the waveform editor will automatically create a waveform with two points. By default, point 1 is located at 0 seconds and point 2 at half of the specified cycle period. In addition, the levels of the two points are equal to the specified “Low VLimit”. Press this softkey and use the numeric keyboard or direction keys and knob to set the initial points of the new waveform. DG4000 allows users to create arbitrary waveform with 1 to 16384

(16K) points. If in need, you can “Insert Point” or “Delete Point” later.

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5. Interp

Press this softkey to enable or disable the interpolation between the defined waveform points.

Off: The waveform editor will hold a constant voltage level between two points and create a step waveform.

Linear: The waveform editor will automatically connect the two defined points with a straight line.

6. Edit Points

Define a waveform by specifying the time and voltage of each waveform point.

Press this softkey to enter the “Edit Points” interface.

PointID: Set the ID of the point to be edited. The default is 1. You can use the numeric keyboard or direction keys and knob to modify this parameter.

Time: Set the time of the current point in a period. This setting is limited by the times of the previous and the next points. Note that the time of point 1 is fixed at 0 s.

Voltage: Set the voltage of the current point in mV or V. The range of the voltage is limited by the “High VLimit” and “Low VLimit”. Note that the waveform editor will automatically set the voltage of the last point to the voltage of point 1 to create a continuous waveform.

Insert Point: Insert a waveform point at the middle position of the currently edited point and the next edited point.

Delete Point: Delete the current point from the waveform and connect the remaining points using the current interpolation method. Note that point 1 cannot be deleted.

7. Edit Block

Define a waveform by editing the time and voltage of the start and end points and automatically setting the points between them through linear interpolation. Press Interp to select “Linear”, and then press this softkey to enter the “Edit Block” interface. Note that if “Linear” is not selected in Interp, this menu is grayed out and disabled.

X1: Set the ID of the start point of the block (namely the time position of the start point). Note that this value should be lower than the “Init Points” and be equal to or lower than X2.

Y1: Set the voltage of the start point in mV or V. The setting range of

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Chapter 3 Arbitrary Waveform Output voltage is limited by “High VLimit” and “Low VLimit”.

X2: Set the ID of the end point of the block (namely the time position of the end point). Note that this value should be lower than or equal to the

“Init Points” and be greater than or equal to X1.

Y2: Set the voltage of the end point in mV or V. The setting range of voltage is limited by “High VLimit” and “Low VLimit”.

Execute: Edit the points between the start and end points according to the current setting.

Delete: Delete the points that can be edited between X1 and X2 and connect the start and end points using the current interpolation method.

Note that point 1 cannot be deleted.

8. Save

The currently created waveform is stored in the volatile memory by default.

When creating a new waveform, the previous waveform in volatile memory will be overwritten. Users can store the waveform created in internal non-volatile memory (C Disk) or external memory (D Disk). Press Save to enter the file storage interface (refer to Store and Recall) to store the waveform created.

Tips

Users can also use the PC software to edit arbitrary waveform and use the following methods to store the waveform in internal memory or external memory:

Use SCPI command (For details, please refer to DG4000 Programming

Guide).

:TRACe:DAC VOLATILE,<binary_block_data>

Save the waveform file stored in USB storage device (identified as “D Disk” in the instrument) to internal memory (C Disk) through the file management system.

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Example: Edit Points

The following example introduces how to use “Edit Points” to create an arbitrary waveform fulfilling the following conditions.

Parameter

Cycle Period

Value

12μs

High VLimit 4V

Low VLImit

Interp

-2V

Linear

Point 1 0s, 0V

Point 2

Point 3

4μs, 4V

8μs, 0V

Point 4 10μs, -2V

Operation Procedures:

1. Press Arb and use to open the 2/2 menu page; then press Create New

Cycle Period, use the numeric keyboard to input “12” and select the unit

“μs” from the pop-up menu.

2. Press High VLimit, use the numeric keyboard to input “4” and select the unit

“V” from the pop-up menu.

3. Press Low VLimit, use the numeric keyboard to input “-2” and select the unit

“V” from the pop-up menu.

4. Press Init #Points , use the numeric keyboard to input “4” and press OK.

Note: at this point, a -2 V level line appears.

5. Press Interp to select “Linear”.

6. Press Edit Points to enter the “Edit Points” interface.

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Chapter 3 Arbitrary Waveform Output

1) Press PointID to define the first point (the time is 0 by default). Press

Voltage, use the numeric keyboard to input “0” and select the unit “V” from the pop-up menu.

2) Press PointID again, use the numeric keyboard or knob to select point 2; then press Time and Voltage to input 4μs and 4 V respectively.

3) Refer to step 2) to input point 3 and 4 in the table.

4) After finishing editing all the points, press OK to return to the previous menu. At this point, press Save to enter the file storage interface (refer to

Store and Recall) to save the edited arbitrary waveform.

7. Observe the edited arbitrary waveform.

V

4

2

2

0

1

3

4 8 12

1

μ s

-2

4

Explanation: as shown in the figure above, the waveform editor will automatically set the voltage of the last point to that of point 1 to create a continuous waveform.

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Example: Edit Block

The following example introduces how to use “Edit Block” to create an arbitrary waveform fulfilling the following conditions.

Parameter Value

Cycle Period

High VLimit

12μs

4V

Low VLimit

Interp

X1Y1

-2V

Linear

2, 4V

X2Y2 4, -2V

Operation Procedures:

1. Press Arb and use to open the 2/2 menu page; then press Create New

Cycle Period, use the numeric keyboard to input “12” and select the unit

“μs” from the pop-up menu.

2. Press High VLimit, use the numeric keyboard to input “4” and select the unit

“V” from the pop-up menu.

3. Press Low VLimit, use the numeric keyboard to input “-2” and select the unit

“V” from the pop-up menu.

4. Press Init #Points, use the numeric keyboard to input “4” and press OK.

Note: at this point, a -2 V level line appears.

5. Press Interp to select “Linear”.

6. Press Edit Block to enter the “Edit Block” interface.

1) Press X1 and use the numeric keyboard to input “2”; then press Y1, use the numeric keyboard to input “4” and select the unit “V” from the pop-up menu. Use the same method to set X2 and Y2.

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Chapter 3 Arbitrary Waveform Output

2) Press Execute to apply the setting of step 1). The waveform editor will connect point 1 (level is -2 V) to point 2 (level is 4 V), point 2 to point 4 as well as point 4 to point 1 using straight lines.

3) After finishing editing all the points, press to return to the previous menu. At this point, press Save to enter the file storage interface (refer to

Store and Recall) to save the edited arbitrary waveform.

7. Observe the edited arbitrary waveform.

V

4

2

0

-2

1

X1,Y1

2

3

3

6

9

4

X2,Y2

12

1

μ s

Explanation: as shown in the figure above, the waveform editor will automatically set the voltage of the last point to that of point 1 to create a continuous waveform.

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To Edit Arbitrary Waveform

Arbitrary waveforms stored in internal non-volatile memory or external memory can be edited.

Press Arb and use to open the 2/2 menu page, then press Edit Wform to open waveform editing menu. Users can also press Edit at the front panel to quickly open this interface.

Only “Select Wform” which will be introduced in this section, is new in this menu compared to Create New. For other menu functions and operations, please refer to To Create New Arbitrary Waveform. Press Edit WformSelect Wform to select the waveform to be edited.

1. To Edit Built-In waveforms

Select a waveform from the built-in waveforms to edit. You can store the edited waveform without overwriting the original built-in waveform.

2. To Edit Stored Waveforms

Select a waveform from internal non-volatile memory (C Disk) or external memory (D Disk) to edit. You can overwrite the old waveform or save the new waveform as a new file.

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Chapter 4 Harmonic Output

DG4000 can be used as a harmonic generator to output harmonic with specified order, amplitude and phase. It is usually used in the test of harmonic detector device or harmonic filter device. This chapter introduces how to configure the generator to output harmonics.

Subjects in this chapter:

 Overview

 To Set Fundamental Waveform Parameters

 To Set Harmonic Order

 To Select Harmonic Type

 To Set Harmonic Amplitude

 To Set Harmonic Phase

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Overview

According to Fourier transform, time domain waveform is the superposition of a series of sine waveforms as shown in the equation below:

f

(

t

)

A

1 sin( 2

f

1

t

1

)

A

2 sin( 2

f

2

t

2

)

A

3 sin( 2

f

3

t

3

)

......

Generally, component with

f

1

frequency is called fundamental waveform,

f

1

is fundamental waveform frequency,

A

1

is fundamental waveform amplitude and

1

is fundamental waveform phase. The frequencies of other components (called harmonics) are all integral multiples of the fundamental waveform frequency.

Components whose frequencies are odd multiples of the fundamental waveform frequency are odd harmonics and components whose frequencies are even multiples of the fundamental waveform frequency are even harmonics.

DG4000 can output up to 16th order of harmonic. After selecting CH1 or CH2, press Harmonic at the front panel to enter the harmonic setting menu. Users can set the parameters of fundamental waveform, set the type of harmonic, specify the highest order of harmonic and set the amplitude and phase of each order of harmonic.

After finishing harmonic parameter setting, press Output1 or/and Output2 and the backlight of the button turns on, the instrument outputs the specified harmonic from the corresponding output terminal.

To Set Fundamental Waveform Parameters

DG4000 allows users to set various fundamental waveform parameters such as frequency, period, amplitude, DC offset voltage, high level, low level and start phase.

It also supports align phase operation. Please refer to introductions in Basic

Waveform Output to set fundamental waveform parameters.

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To Set Harmonic Order

The highest order of harmonic output from DG4000 can not be greater than this setting value.

After entering the harmonic setting menu, press Order (at this point, “Order” on the screen is highlighted) and use the numeric keyboard or the direction keys and knob to input the harmonic order. The range is limited by the maximum output frequency of the instrument as well as the fundamental waveform frequency.

 Range: integers within 2 to maximum output frequency of the

instrument÷ fundamental waveform frequency.

 The maximum is 16.

To Select Harmonic Type

DG4000 can output even harmonic, odd harmonic, all orders of harmonic or user-defined orders of harmonic. After entering the harmonic setting menu, press

Type to select the desired harmonic type.

1. Even

Press this key and the instrument would output fundamental waveform and even harmonics.

2. Odd

Press this key and the instrument would output fundamental waveform and odd harmonics.

3. All

Press this key and the instrument would output fundamental waveform and all the harmonics in order.

4. User

Press this key and the instrument would output the user-defined orders of harmonics. The highest order is 16.

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16 bits binary data is used to represent the output status of the 16 orders of harmonics respectively, wherein, 1 represents enabling the output of the corresponding harmonic and 0 represents disabling the output of the corresponding harmonic. Users only need to use the numeric keyboard to modify the value of each data bit (note: the leftmost bit representing fundamental waveform is always X and can not be modified). For example, set the 16 bits data to X001 0000 0000 0001, thus 4th and 16th orders of harmonics are output.

Note: the actual harmonics output is determined by the “Order” currently specified.

To Set Harmonic Amplitude

After entering the harmonic setting menu, press Ampl to set the amplitude of each order of harmonic.

1. Sn: press this softkey to select the sequence number of the harmonic to be set.

2. Ampl: press this softkey to set the amplitude of the harmonic selected. Use the numeric keyboard or direction keys and knob to input the amplitude value and then select the desired unit from the pop-up menu.

 For the input method of amplitude value, refer to the introduction in

Parameter Setting Method.

 The amplitude units available are Vpp, mVpp, Vrms, mVrms and dBm (not available in HighZ).

To Set Harmonic Phase

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After entering the harmonic setting menu, press Phase to set the phase of each order of harmonic.

1. Sn: press this softkey to select the sequence number of the harmonic to be set.

2. Phase: press this softkey to set the phase of the harmonic selected. Use the numeric keyboard or the direction keys and knob to input the phase value and then select the unit “°” from the pop-up menu. For the input method of phase value, refer to the introduction in Parameter Setting Method.

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 AM

 FM

 PM

 ASK

 FSK

 PSK

 BPSK

 QPSK

 3FSK

 4FSK

 OSK

 PWM

Chapter 5 Modulated Waveform Output

DG4000 supports AM, FM, PM, ASK, FSK, 3FSK, 4FSK, PSK, BPSK, QPSK, PWM and

OSK modulations. DG4000 can output modulated waveform from a single channel or from two channels at the same time. The modulated waveform consists of carrier waveform and modulating waveform. The carrier waveform can be Sine,

Square, Ramp, Arbitrary waveform (except DC) or Pulse (only in PWM). The modulating waveform can be from internal or external modulation source.

Subjects in this chapter:

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AM

Modulated waveform usually consists of carrier waveform and modulating waveform. For amplitude modulation (AM), the amplitude of the carrier waveform varies with the instantaneous voltage of the modulating waveform.

To Select AM Modulation

Press ModTypeAM to enable AM function.

 When Mod is enabled, Sweep or Burst will be disabled automatically (if enabled currently).

 After AM is enabled, the instrument will generate AM waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

AM carrier waveform could be Sine, Square, Ramp or Arbitrary waveform (except

DC). The default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform (or

User, the pre-defined waveform can not be DC) to select a desired carrier waveform shape.

 Pulse, Noise and DC could not be used as carrier waveform.

To Set Carrier Frequency

Different carrier waveforms have different frequency ranges as shown in the table below. For all the carrier waveforms, the default value is 1kHz.

Carrier Waveform

Sine

Square

Frequency Range

1μHz to 160MHz

1μHz to 50MHz

Ramp

Arbitrary Waveform

1μHz to 4MHz

1μHz to 40MHz

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After the carrier waveform is selected, you can press Freq/Period to highlight

“Freq”, and then use the numeric keyboard or direction keys and knob to input the desired frequency value.

To Select Modulating Waveform Source

DG4000 can accept modulating waveform from internal or external modulation source. Press ModSource to select “Int” or “Ext” modulation source.

1. Internal Source

When internal modulation source is selected, press Shape to select Sine,

Square, Triangle, UpRamp, DnRamp, Noise or Arb as modulating waveform.

The default is Sine.

 Square: 50% duty cycle.

 Triangle: 50% symmetry.

 UpRamp: 100% symmetry.

 DnRamp: 0% symmetry.

 Arb: when arbitrary waveform is selected as modulating waveform, the generator would limit the waveform length to 2kpts automatically.

Note: Noise can be used as modulating waveform but can not be used as carrier waveform.

2. External Source

When external modulation source is selected, the Shape menu will be grayed out and disabled. The generator accepts the external modulating signal from the [Mod/FSK/Trig] connector at the rear panel. The AM modulating amplitude is controlled by the ± 2.5 V signal level of the connector.

[Mod/FSK/Trig]

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To Set Modulating Waveform Frequency

When internal modulation source is selected, press AM_Freq to set the modulating waveform frequency.

 Input the desired frequency value using the numeric keyboard or direction keys and knob.

 The modulating waveform frequency ranges from 2mHz to 50kHz, and the default value is 100Hz.

Notice that, this menu will be grayed out and disabled when external modulation source is selected.

To Set Modulation Depth

Modulation depth expressed as a percentage indicates the amplitude variation degree. The AM modulation depth ranges from 0% to 120%. Press AM Depth to set AM modulation depth.

 In 0% modulation, the output amplitude is half of the specified value.

 In 100% modulation, the output amplitude is equal to the specified value.

 In >100% modulation, the output amplitude of the instrument would not exceed 10Vpp (50Ω load).

When “Ext” modulation source is selected, the output amplitude of the instrument is also controlled by the ± 2.5V signal level at the [Mod/FSK/Trig] connector at the rear panel. For example, set the modulation depth to 100%, the output amplitude is the maximum when the modulating signal is +2.5V and the minimum when the modulating signal is -2.5V.

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FM

Modulated waveform consists of carrier waveform and modulating waveform. For frequency modulation (FM), the frequency of the carrier waveform varies with the instantaneous voltage of the modulating waveform.

To Select FM Modulation

Press ModTypeFM to enable FM function.

 When Mod is enabled, Sweep or Burst will be disabled automatically (if currently enabled).

 After FM is enabled, the instrument will generate FM waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

FM carrier waveform could be Sine, Square, Ramp or Arbitrary waveform (except

DC). The default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select a desired carrier waveform shape.

 Pulse, Noise and DC could not be used as carrier waveform.

To Set Carrier Frequency

Different carrier waveforms have different frequency ranges as shown in the table below. For all the carrier waveforms, the default value is 1kHz.

Carrier Waveform

Sine

Square

Frequency Range

1μHz to 160MHz

1μHz to 50MHz

Ramp

Arbitrary Waveform

1μHz to 4MHz

1μHz to 40MHz

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After the carrier waveform is selected, you can press Freq/Period to highlight

“Freq”, and then use the numeric keyboard or direction keys and knob to input the desired frequency value.

To Select Modulating Waveform Source

DG4000 can accept modulating waveform from internal or external modulation source. Press ModSource to select “Int” or “Ext” modulation source.

1. Internal Source

When internal modulation source is selected, press Shape to select Sine,

Square, Triangle, UpRamp, DnRamp, Noise or Arb as modulating waveform.

The default is Sine.

 Square: 50% duty cycle.

 Triangle: 50% symmetry.

 UpRamp: 100% symmetry.

 DnRamp: 0% symmetry.

 Arb: when arbitrary waveform is selected as modulating waveform, the generator would limit the waveform length to 2kpts automatically.

Note: Noise can be used as modulating waveform but can not be used as carrier waveform.

2. External Source

When external modulation source is selected, the Shape menu will be grayed out and disabled. The generator accepts the external modulating signal from the [Mod/FSK/Trig] connector at the rear panel. The frequency deviation is controlled by the ± 2.5 V signal level of the connector.

[Mod/FSK/Trig]

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To Set Modulating Waveform Frequency

When internal modulation source is selected, press FM_Freq to set the modulating waveform frequency.

 Input the desired frequency value using the numeric keyboard or direction keys and knob.

 The modulating waveform frequency ranges from 2mHz to 50kHz, and the default value is 100Hz.

Notice that, this menu will be grayed out and disabled when external modulation source is selected.

To Set Frequency Deviation

Frequency deviation is the deviation of the modulating waveform frequency relative to the carrier frequency. Press Deviation to set the FM frequency deviation.

 Frequency deviation must be lower than or equal to the carrier frequency.

 The sum of frequency deviation and carrier frequency must be lower than or equal to the sum of the current carrier frequency upper limit and 1kHz.

When “Ext” modulation source is selected, frequency deviation is controlled by the

± 2.5V signal level at the [Mod/FSK/Trig] connector at the rear panel. Positive signal level corresponds to frequency increase and negative signal level corresponds to frequency decrease. The lower the level, the less offset is generated. For example, if the frequency deviation is set to 1kHz, +2.5V signal level corresponds to a 1kHz increase of frequency and -2.5V signal level corresponds to a 1kHz decrease of frequency.

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PM

Modulated waveform consists of carrier waveform and modulating waveform. For phase modulation (PM), the phase of the carrier waveform varies with the instantaneous voltage of the modulating waveform.

To Select PM Modulation

Press ModTypePM to enable PM function.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if currently enabled).

 After PM is enabled, the instrument will generate PM waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

PM carrier waveform could be Sine, Square, Ramp or Arbitrary waveform (except

DC). The default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select the desired carrier waveform shape.

 Pulse, Noise and DC could not be used as carrier waveform.

To Set Carrier Frequency

Different carrier waveforms have different frequency ranges as shown in the table below. For all the carrier waveforms, the default value is 1kHz.

Carrier Waveform Frequency Range

Sine

Square

Ramp

Arbitrary Waveform

1μHz to 160MHz

1μHz to 50MHz

1μHz to 4MHz

1μHz to40 MHz

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After the carrier waveform is selected, you can press Freq/Period to highlight

“Freq”, and then use the numeric keyboard or direction keys and knob to input the desired frequency value.

To Select Modulating Waveform Source

DG4000 can accept modulating waveform from internal or external modulation source. Press ModSource to select “Int” or “Ext” modulation source.

1. Internal Source

When internal modulation source is selected, press Shape to select Sine,

Square, Triangle, UpRamp, DnRamp, Noise or Arb as modulating waveform.

The default is Sine.

 Square: 50% duty cycle.

 Triangle: 50% symmetry.

 UpRamp: 100% symmetry.

 DnRamp: 0% symmetry.

 Arb: when arbitrary waveform is selected as modulating waveform, the generator would limit the waveform length to 2kpts automatically.

Note: Noise can be used as modulating waveform but can not be used as carrier waveform.

2. External Source

When external modulation source is selected, the Shape menu will be grayed out and disabled. The generator accepts the external modulating signal from the [Mod/FSK/Trig] (as shown in the figure below) connector at the rear panel. The phase deviation is controlled by the ± 2.5 V signal level of the connector.

[Mod/FSK/Trig]

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To Set Modulating Waveform Frequency

When internal modulation source is selected, press PM_Freq to set the modulating waveform frequency.

 Input the desired frequency value using the numeric keyboard or direction keys and knob.

 The modulating waveform frequency ranges from 2mHz to 50kHz, and the default value is 100Hz.

Notice that, this menu will be grayed out and disabled when external modulation source is selected.

To Set Phase Deviation

Phase deviation is the deviation of the modulating waveform phase relative to the carrier waveform phase. Press Deviation to set the PM phase deviation.

 Use the numeric keyboard or direction keys and knob to input the desired phase value.

 The range of phase deviation is from 0º to 360º.

When “Ext” modulation source is selected, the phase deviation is controlled by the

± 2.5V signal level at the [Mod/FSK/Trig] connector at the rear panel. For example, if the phase deviation is set to 180º, +2.5V signal level corresponds to a

180º phase variation. The lower the external signal level, the less deviation would be generated.

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ASK

When using ASK (Amplitude Shift Keying) modulation, you can configure the generator to “shift” its output amplitude between two preset amplitude values

(“carrier amplitude” and “modulating amplitude”). The “shift” rate (ASK Rate) is determined by the internal signal level or signal level at the [Mod/FSK/Trig] connector at the rear panel.

To Select ASK Modulation

Press ModTypeASK to enable ASK function.

 When Mod is enabled, Sweep or Burst will be disabled automatically (if enabled currently).

 After ASK is enabled, the instrument will generate ASK waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

ASK carrier waveform could be Sine, Square, Ramp or arbitrary waveform (except

DC). The default is Sine.

 Press the front panel key Sine, Square, Ramp or Arb

Select Wform

(or User, the pre-defined waveform can not be DC) to select the desired carrier waveform shape.

 Pulse, Noise and DC could not be used as carrier waveform.

To Set Carrier Amplitude

After selecting carrier waveform shape, press Ampl/HiLevel to highlight “Ampl”, and then use the numeric keyboard or direction keys and knob to input the desired amplitude. The available amplitude range is limited by Resistance and

Freq/Period. Please refer to the “Output Characteristics” described in

Specifications.

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To Select Modulating Waveform Source

Press ModSource to select “Int” or “Ext” modulating waveform source.

1. Internal Source

When internal source is selected, the modulating waveform is set as a Square with 50% duty cycle, and the rate at which the output amplitude “shifts” between “carrier amplitude” and “modulating amplitude” is determined by

“ASK Rate”.

2. External Source

When external source is selected, the generator accepts the external modulating signal from the [Mod/FSK/Trig] connector at the rear panel.

[Mod/FSK/Trig]

Note: the [Mod/FSK/Trig] connector is different when controlling ASK and AM/FM/PM modulations externally. In ASK modulation, the

[Mod/FSK/Trig] connector has adjustable edge polarity.

To Set ASK Rate

When internal source is selected, press ASK Rate to set the rate at which the output amplitude shifts between “carrier amplitude” and “modulating amplitude”.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

Note: when “Ext” modulation source is selected, this menu would be grayed out and disabled.

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To Set Modulating Amplitude

Press ModAmp to set the modulating amplitude.

 Use the numeric keyboard or direction keys and knob to input the desired amplitude value.

 The range of amplitude (HighZ) is from 0 to 10V and the default is 2V.

To Set Modulating Polarity

Press Polarity to select the “Pos” or “Neg” polarity of the modulating waveform to control the output amplitude.

In internal modulation, set the polarity to “Pos” and the generator would output the greater of the carrier amplitude and modulating amplitude when the modulating waveform is logic low and output the lower when the modulating waveform is logic high. The situation is the opposite when the polarity is set to

“Neg”.

In external modulation, set the polarity to “Pos” and the generator would output the greater of the carrier amplitude and modulating amplitude when logic low level is input and output the lower when the logic high level is input. The situation is the opposite when the polarity is set to “Neg”.

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FSK

When FSK (Frequency Shift Keying) modulation is selected, you can configure the generator to “shift” its output frequency between two preset frequencies (“carrier frequency” and “hop frequency”). The “shift” frequency (FSK Rate) is determined by the internal signal level or signal level at the [Mod/FSK/Trig] connector at the rear panel.

To Select FSK Modulation

Press ModTypeFSK to enable FSK function.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After FSK is enabled, the instrument will generate FSK waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

FSK carrier waveform could be Sine, Square, Ramp or arbitrary waveform (except

DC), and the default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select desired carrier waveform shape.

 Pulse, Noise and DC could not be used as carrier waveform.

To Set Carrier Frequency

Different carrier waveforms have different frequency ranges as shown in the table below. For all the carrier waveforms, the default value is 1kHz.

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Carrier Waveform

Sine

Square

Ramp

Arbitrary Waveform

Frequency Range

1μHz to 160MHz

1μHz to 50MHz

1μHz to 4MHz

1μHz to 40MHz

After the carrier waveform is selected, you can press Freq/Period to highlight

“Freq”, and then use the numeric keyboard or direction keys and knob to input the desired frequency value.

To Select Modulating Waveform Source

Press ModSource to select “Int” or “Ext” modulating waveform source.

1. Internal Source

When internal source is selected, the modulating waveform is set as a Square with 50% duty cycle, and the frequency at which the output frequency shifts between “carrier frequency” and “hop frequency” is determined by “FSK Rate”.

2. External Source

When external source is selected, the generator accepts the external modulating signal from the [Mod/FSK/Trig] connector at the rear panel.

[Mod/FSK/Trig]

Note: the [Mod/FSK/Trig] connector is different when controlling FSK and AM/FM/PM modulations externally. In FSK modulation, the

[Mod/FSK/Trig] connector has adjustable edge polarity.

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To Set FSK Rate

When internal source is selected, press FSK Rate to set the frequency at which the output frequency shifts between “carrier frequency” and “hop frequency”.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

Note: when “Ext” modulation source is selected, this menu is grayed out and disabled.

To Set Hop Frequency

Alternating frequency (“hop” frequency) is the modulating frequency. The range of hop frequency depends on the carrier waveform currently selected. Press

HopFreq to highlight it and input the desired frequency value using the numeric keyboard or direction keys and knob.

 Sine: 1μHz to 160MHz

 Square: 1μHz to 50MHz

 Ramp: 1μHz to 4MHz

 Arb: 1μHz to 40MHz

To Set Modulating Polarity

Press Polarity to select the “Pos” or “Neg” polarity of the modulating waveform to control the output frequency.

In internal modulation, set the polarity to “Pos” and the generator would output the carrier frequency when the modulating waveform is logic low and output the hop frequency when the modulating waveform is logic high. The situation is the opposite when the polarity is set to “Neg”.

In external modulation, set the polarity to “Pos” and the generator would output the carrier frequency when logic low level is input and output the modulating frequency when logic high level is input. The situation is the opposite when the polarity is set to “Neg”.

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PSK

When PSK (Phase Shift Keying) modulation is selected, you can configure the generator to “shift” its output phase between two preset phase values (“carrier phase” and “modulating phase”). The “shift” frequency (PSK Rate) is determined by the internal signal level or signal level at the [Mod/FSK/Trig] connector at the rear panel.

To Select PSK Modulation

Press ModTypePSK to enable PSK function.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After PSK is enabled, the instrument will generate PSK waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

PSK carrier waveform could be Sine, Square, Ramp or arbitrary waveform (except

DC), and the default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select the desired carrier waveform shape.

 Pulse, Noise and DC could not be used as carrier waveform.

To Set Carrier Phase

After carrier waveform shape is selected, press Start Phase to highlight it and use the numeric keyboard or direction keys and knob to input the desired phase. The available phase ranges from 0º to 360º and the default value is 0º.

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To Select Modulating Waveform Source

Press ModSource to select “Int” or “Ext” modulating waveform source.

1. Internal Source

When internal source is selected, the modulating waveform is set as a Square with 50% duty cycle, and the frequency at which the output phase shifts between “carrier phase” and “modulating phase” is determined by “PSK Rate”.

2. External Source

When external source is selected, the generator accepts the external modulating signal from the [Mod/FSK/Trig] connector (as shown in the figure below) at the rear panel.

[Mod/FSK/Trig]

Note: the [Mod/FSK/Trig] connector is different when controlling PSK and AM/FM/PM modulations externally. In PSK modulation, the

[Mod/FSK/Trig] connector has adjustable edge polarity.

To Set PSK Rate

When internal source is selected, press PSK Rate to set the frequency at which the output phase shifts between “carrier phase” and “modulating phase”.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

Note: when “Ext” is selected, this menu is grayed out and disabled.

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To Set PSK Phase

PSK phase is the modulating phase. Press Phase to set the modulating phase.

 Use the numeric keyboard or direction keys and knob to input the desired phase value.

 The phase range is from 0º to 360º and the default is 180º.

To Set Modulating Polarity

Press Polarity to select the “Pos” or “Neg” polarity of the modulating waveform to control the output phase.

In internal modulation, set the polarity to “Pos” and the generator would output the carrier phase when the modulating waveform is logic low and output the modulating phase when the modulating waveform is logic high. The situation is the opposite when the polarity is set to “Neg”.

In external modulation, set the polarity to “Pos” and the generator would output the carrier phase when logic low level is input and output the modulating phase when logic high level is input. The situation is the opposite when the polarity is set to “Neg”.

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BPSK

When BPSK (Binary Phase Shift Keying) is selected, you can configure the generator to “shift” its output phase between two preset phases (“carrier phase” and “modulating phase”). The “shift” frequency (BPSK rate) is determined by the internal signal level of the instrument.

To Select BPSK Modulation

Press ModTypeBPSK to enable BPSK function.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After BPSK is enabled, the instrument will generate BPSK waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

BPSK carrier waveform could be Sine, Square, Ramp or arbitrary waveform

(except DC), and the default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select desired carrier waveform shape.

 Pulse, Noise and DC could not be used as carrier waveform.

To Set Carrier Phase

After carrier waveform shape is selected, press Start Phase to highlight it and use the numeric keyboard or the direction keys and knob to input the desired phase.

The phase range is from 0º to 360º and the default is 0º.

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To Select Modulating Waveform Source

BPSK uses internal modulation source. Press Data Source to select PN15, PN21,

01 or 10and the default is PN15.

Explanation:

PN sequence (Pseudo-noise Sequence), a kind of periodic bianary sequence, has the statistical characteristics similar to a random noise but can be produced and processed repeatedly. The most commonly used PN sequence is m sequence generated by shift registers with linear feedback and its period is relevant to the linear feedback logic and the initial state of each register.

The period of the m sequence generated by n-level shift register is 2 n

-1. As

In the figure below is a 4-level linear feedback shift register of which the feedback logic is a3

 a2. For PN15 and PN21, 15 and 21are levels of the registers.

+

Output a3 a2 a1 a0

To Set BPSK Rate

BPSK uses internal modulation source. Press Rate to set the frequency at which the output phase shifts between “carrier phase” and “modulating phase”.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

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To Set BPSK Phase

BPSK phase is the modulating phase. Press Phase to set the modulating phase.

 Use the numeric keyboard or direction keys and knob to input the desired phase value.

 The phase range is from 0º to 360º and the default is 180º.

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QPSK

When QPSK (Quadrature Phase Shift Keying) is selected, you can configure the generator to “shift” its output phase among four preset phases (“carrier phase” and three “modulating phases”). The “shift” frequency (QPSK rate) is determined by the internal signal level of the instrument.

To Select QPSK Modulation

Press ModTypeQPSK to enable QPSK function.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After QPSK is enabled, the instrument will generate QPSK waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

QPSK carrier waveform could be Sine, Square, Ramp or arbitrary waveform

(except DC), and the default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select desired carrier waveform shape.

 Pulse (basic waveform), Noise and DC could not be used as carrier waveform.

To Set Carrier Phase

After carrier waveform shape is selected, press Start Phase to highlight it and use the numeric keyboard or direction keys and knob to input the desired phase. The phase range is from 0º to 360º and the default is 0º.

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To Select Modulating Waveform Source

QPSK uses internal modulation source. Press Data Source to select PN15 or PN21 and the default is PN15.

To Set QPSK Rate

QPSK uses internal modulation source. Press Rate to set the frequency at which the output phase shifts between “carrier phase” and “modulating phase”.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

To Set QPSK Phases

QPSK phases are the modulating phases. Press Phase1, Phase2 and Phase3 to set the modulating phases respectively.

 Use the numeric keyboard or direction keys and knob to input the desired phase value.

 The phase range is from 0º to 360º and the default values of Phase1,

Phase2 and Phase3 are 450º, 135º and 225º respectively.

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3FSK

When 3FSK (3 Frequency Shift Keying) modulation is selected, you can configure the generator to “shift” its output frequency among three preset frequencies

(“carrier frequency” and two “modulating frequencies”). The “shift” frequency

(3FSK rate) is determined by the internal signal level of the instrument.

To Select 3FSK Modulation

Press ModType3FSK to enable 3FSK function.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After 3FSK is enabled, the instrument will generate 3FSK waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

3FSK carrier waveform could be Sine, Square, Ramp or arbitrary waveform (except

DC), and the default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select desired carrier waveform shape.

 Pulse (basic waveform), Noise and DC could not be used as carrier waveform.

To Set Carrier Frequency

Different carrier waveforms have different frequency ranges as shown in the table below. For all the carrier waveforms, the default value is 1kHz.

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Chapter 5 Modulated Waveform Output

Carrier Waveform

Sine

Frequency Range

1μHz to 160MHz

Square

Ramp

1μHz to 50MHz

1μHz to 4MHz

Arbitrary Waveform 1μHz to 40MHz

After the carrier waveform is selected, you can press Freq/Period to highlight

“Freq”, and then use the numeric keyboard or direction keys and knob to input the desired frequency value.

Modulation Source

3FSK uses internal modulation source and the modulating waveform is Sine.

To Set 3FSK Rate

3FSK uses internal modulation source. Press KeyFreq to set the frequency at which the output frequency shifts between “carrier frequency” and the two “hop frequencies”.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

To Set Hop Frequencies

Alternating frequencies (“hop” frequencies) are the modulating frequencies. The ranges of hop frequencies depend on the carrier waveform currently selected.

Press HopFreq1 and HopFreq2 to highlight them and input the desire frequency values using the numeric keyboard or direction keys and knob respectively.

 Sine: 1μHz to 160MHz

 Square: 1μHz to 50MHz

 Ramp: 1μHz to 4MHz

 Arb: 1μHz to 40MHz

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4FSK

When 4FSK (4 Frequency Shift Keying) modulation is selected, you can configure the generator to “shift” its output frequency among four preset frequencies

(“carrier frequency” and three “hop frequencies”). The “shift” frequency (4FSK rate) is determined by the internal signal level of the instrument.

To Select 4FSK Modulation

Press ModType4FSK to enable 4FSK function.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After 4FSK is enabled, the instrument will generate 4FSK waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

4FSK carrier waveform could be Sine, Square, Ramp or arbitrary waveform (except

DC), and the default is Sine.

 Press the front panel key Sine, Square, Ramp or ArbSelect Wform

(or User, the pre-defined waveform can not be DC) to select the desired carrier waveform shape.

 Pulse (basic waveform), Noise and DC could not be used as carrier waveform.

To Set Carrier Frequency

Different carrier waveforms have different frequency ranges as shown in the table below. For all the carrier waveforms, the default value is 1kHz.

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Chapter 5 Modulated Waveform Output

Carrier Waveform

Sine

Frequency Range

1μHz to 160MHz

Square

Ramp

1μHz to 50MHz

1μHz to 4MHz

Arbitrary Waveform 1μHz to 40MHz

After the carrier waveform is selected, you can press Freq/Period to highlight

“Freq”, and then use the numeric keyboard or direction keys and knob to input the desired frequency value.

Modulation Source

4FSK uses internal modulation source and the modulating waveform is Sine.

To Set 4FSK Rate

4FSK uses internal modulation source. Press KeyFreq to set the frequency at which the output frequency shifts between “carrier frequency” and three “hop frequencies”.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

To Set Hop Frequencies

Alternating frequencies (“hop” frequencies) are the modulating frequencies. The ranges of hop frequencies depend on the carrier waveform currently selected.

Press HopFreq1, HopFreq2 and HopFreq3 to highlight them and input the desire frequency values using the numeric keyboard or direction keys and knob respectively.

 Sine: 1μHz to 160MHz

 Square: 1μHz to 50MHz

 Ramp: 1μHz to 4MHz

 Arb: 1μHz to 40MHz

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OSK

When OSK (Oscillation Shift Keying) modulation is selected, users can configure the generator to output a sine signal with intermittent oscillation as shown in the figure below (the carrier waveform is 100Hz and the OSK rate is 10kHz). The start-oscillation and stop-oscillation of the internal crystal oscillator are controlled by the internal signal level or signal level at the [Mod/FSK/Trig] connector at the rear panel. When the internal crystal oscillator starts to oscillate, the instrument starts to output the carrier waveform and when the internal crystal stops oscillating, the output stops.

Figure 5-1 OSK Modulated Waveform

To Select OSK Modulation

Press ModTypeOSK to enable OSK function.

 When Sine is currently selected, OSK in the Type is not available.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After OSK is enabled, the instrument will generate OSK waveform with the currently specified carrier and modulating waveforms.

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Chapter 5 Modulated Waveform Output

To Select Carrier Waveform Shape

OSK carrier waveform can only be sine waveform. Press Sine at the front panel.

To Set Carrier Frequency

After carrier waveform shape is selected, press Freq/Period to highlight “Freq” and use the numeric keyboard or direction keys and knob to input the desired frequency. The range is from 1μHz to 160MHz.

To Select Modulating Waveform Source

Press ModSource to select “Int” or “Ext” modulation source.

1. Internal Source

When internal source is selected, the modulating waveform is set as a Square with 50% duty cycle. At this point, the intermittence time and oscillate time of the output signal is determined by the OSK “Rate”.

2. External Source

When external source is selected, the generator accepts external modulating signal from the [Mod/FSK/Trig] connector at the rear panel.

[Mod/FSK/Trig]

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To Set OSK Rate

When internal source is selected, press Rate to set the OSK rate.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

To Set Oscillate Period

Oscillate period is the oscillation period of internal crystal oscillator. Press

OscTime to highlight it and use the numeric keyboard or direction keys and knob to input the desired period. The range is from 8ns to 200s.

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Chapter 5 Modulated Waveform Output

PWM

A PWM (Pulse Width Modulation) modulated waveform consists of carrier waveform and modulating waveform. The pulse width of the carrier waveform varies with the instantaneous voltage of the modulating waveform.

To Select PWM Modulation

PWM can only be used to modulate pulse. To select PWM modulation, press Pulse at the front panel first and then press Mod to enable PWM function.

 If the Pulse function key has not been selected, PWM in Type menu is unavailable.

 When Mod is enabled but the modulation type is not PWM, pressing Pulse will select PWM automatically.

 When Mod is enabled, Sweep or Burst will be automatically disabled (if enabled currently).

 After PWM is enabled, the instrument will generate PWM waveform with the currently specified carrier and modulating waveforms.

To Select Carrier Waveform Shape

As mentioned before, PWM can only be used to modulate Pulse. To select Pulse waveform, press Pulse at the front panel.

To Set Pulse Width/Duty Cycle

After the carrier waveform shape is selected, press Width/Duty to highlight

“Width” or “Duty” and input the desired value using the numeric keyboard or direction keys and knob.

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To Select Modulating Waveform Source

Press ModSource to select “Int” or “Ext” modulating waveform source.

1. Internal Source

When internal modulation source is selected, press Shape to select Sine,

Square, Triangle, UpRamp, DnRamp, Noise or Arb as modulating waveform.

The default is Sine.

 Square: 50% duty cycle.

 Triangle: 50% symmetry.

 UpRamp: 100% symmetry.

 DnRamp: 0% symmetry.

 Arb: when arbitrary waveform is selected as modulating waveform, the generator would limit the waveform length to 2kpts automatically.

Note: Noise can be used as modulating waveform but can not be used as carrier waveform.

2. External Source

When external modulation source is selected, the Shape menu will be grayed out and disabled. The generator accepts the external modulating signal from the [Mod/FSK/Trig] connector at the rear panel. The “WidthDev” (or

“DutyDev”) is controlled by the ± 2.5 V signal level of the connector.

To Set Modulating Waveform Frequency

When internal modulation source is selected, press PWM Freq to set the frequency of the modulating waveform.

 Use the numeric keyboard or direction keys and knob to input the desired frequency value.

 The frequency range is from 2mHz to 1MHz and the default is 100Hz.

Note: when “Ext” modulation source is selected, this menu is grayed out and disabled.

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To Set Pulse Width/Duty Cycle Deviation

Press WidthDeV (or “DutyDev”) and input the desired value using the numeric keyboard or direction keys and knob.

 Width deviation represents the variation (in seconds) of the modulated waveform pulse width relative to the original pulse width.

Pulse width deviation range: 0s to 500ks.

The width deviation can not exceed the current pulse width.

The width deviation is limited by the minimum pulse width and current edge time setting.

 Duty cycle deviation represents the variation (in %) of the modulated waveform duty cycle relative to the original pulse duty cycle.

Duty cycle deviation range: 0% to 50%。

The duty cycle deviation can not exceed the current pulse duty cycle.

The duty cycle is limited by the minimum duty cycle and current edge time setting.

When “Ext” modulation source is selected, width deviation (or duty deviation) is controlled by the ± 2.5V signal level at the [Mod/FSK/Trig] connector at the rear panel. For example, if the width deviation is set to 10s, the +2.5V signal level corresponds to a 10s variation in pulse width.

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Chapter 6 Sweep

DG4000 can output sweep from a single channel or from dual channels at the same time. In sweep mode, the generator varies its output from the start frequency to end frequency within the specified sweep time. DG4000 supports linear, log and step sweep modes, allows users to set start hold, end hold and return time, supports internal, external or manual trigger source and can generate sweep output for Sine, Square, Ramp and arbitrary waveform (except DC).

Subjects in this chapter:

 To Enable Frequency Sweep

 Start Frequency and End Frequency

 Center Frequency and Frequency Span

 Sweep Type

 Sweep Time

 Return Time

 Mark Frequency

 Start Hold

 End Hold

 Sweep Trigger Source

 Trigger Output Edge

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Chapter 6 Sweep

To Enable Frequency Sweep

Press Sweep at the front panel to enable the sweep function (the backlight of the key goes on), and Mod or Burst function will be automatically disabled (if currently enabled). The instrument will generate the sweep waveform from the corresponding channel (if currently turned on) according to the current configuration. You can also reset the sweep function menu. Please refer to the introduction in the following text for details.

Start Frequency and End Frequency

Start frequency and end frequency are the upper and lower limits of the frequency for frequency sweep. The generator sweeps from the start frequency to the end frequency and then returns back to the start frequency.

 Start Frequency < End Frequency: the generator sweeps from low frequency to high frequency.

 Start Frequency > End Frequency: the generator sweeps from high frequency to low frequency.

 Start Frequency = End Frequency: the generator outputs with a fixed frequency.

When frequency sweep is enabled, press Start/Center to highlight “Start”.

Notice that, “End” in End/Span will also be highlighted. Use the numeric keyboard or direction keys and knob to input the desired frequencies. By default, the start frequency is 100Hz and the end frequency is 1kHz. Different sweep waveform corresponds to different start frequency and end frequency range.

 Sine: 1μHz to 160MHz

 Square: 1μHz to 50MHz

 Ramp: 1μHz to 4MHz

 Arb: 1μHz to 40MHz

The generator will renewedly sweep from the specified “start frequency” after start frequency or end frequency is changed.

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Center Frequency and Frequency Span

You can also set the frequency boundaries of frequency sweep through center frequency and frequency span.

 Center Frequency = (|Start Frequency + End Frequency|) / 2

 Frequency Span = End Frequency – Start Frequency

When frequency sweep is enabled, press Start/Center to highlight “Center”.

Notice that, “Span” in End/Span will also be highlighted. Use the numeric keyboard or direction keys and knob to enter the desired frequency values. By default, the center frequency is 550Hz and the frequency span is 900Hz.

Different sweep waveform corresponds to different center frequency and frequency span range and center frequency and frequency span are interrelative.

Define the minimum frequency of the waveform currently selected as

F

min

, the maximum frequency as

F

and max

F m

(

F

min

F

max

) / 2

.

 The range of center frequency is from

F

to min

F

and the parameters for max different waveforms are as follows:

Sine: 1μHz to 160MHz

Square: 1μHz to 50MHz

Ramp: 1μHz to 4MHz

Arb: 1μHz to 40MHz

 Frequency span range is influenced by the center frequency:

Center frequency <

F

: frequency span range is ± 2× (center frequency m

F

); min

Center frequency ≥

F

: frequency span range is ± 2× ( m

F

– center max frequency).

Take sine as an example.

F

is 1μHz, min

F

is 160MHz and max

F

is about m

80MHz.

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Chapter 6 Sweep

If the center frequency is 550Hz, the frequency span range is ± 2× (550Hz–1μHz)

= ± 1.099999998kHz; if the center frequency is 155MHz, the frequency span range is ± 2× (160MHz–155MHz) = ± 10MHz.

The generator will renewedly sweep from the specified “Start Frequency” after

“Center Frequency” or “Frequency Span” is changed.

Tip

In large-scale sweep, the amplitude characteristic of the output signal might change.

Sweep Type

DG4000 provides three sweep types, including Linear, Log and Step, and the default is Linear.

Linear Sweep

The output frequency of the instrument varies linearly in the way of “several Hertz per second”. The variation is controlled by “Start Frequency”, “End Frequency” and

“Sweep Time”.

When Sweep is enabled, press SwpType to select “Linear”. A line is displayed on the waveform on the screen, indicating that the output frequency changes in linear mode.

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Figure 6-1 Linear Sweep

Log Sweep

The output frequency of the instrument varies in a logarithmic fashion, that is, the output frequency changes in the way of “octave per second” or “decade per second”. The change is controlled by “Start Frequency”, “End Frequency” and

“Sweep Time”.

When Log Sweep is enabled, users could set the following parameters:

Start Frequency

F

, End Frequency

start

F

and Sweep Time

stop

T sweep

The function prototype of Log Sweep is

F current

P

T

. P and T could be expressed by the above-mentioned parameters:

P

10 lg(

F stop

/

F start

) /

T sweep

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Chapter 6 Sweep

T

t

 lg(

F start

) / lg(

P

)

Wherein, t is the time from the start of the sweep and its range is from 0 to

T

.

sweep

F

is the instantaneous frequency of the current output.

current

When Sweep is enabled, press SwpType to select “Log”. An exponential function curve is displayed on the waveform on the screen, indicating that the output frequency changes in a logarithmic mode.

Figure 6-2 Log Sweep

Step Sweep

The output frequency of the instrument “steps” from “Start Frequency” to “End

Frequency”. The duration of the output signal on each frequency point is

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When Sweep is enabled, press SwpType to select “Step”. A step waveform is displayed on the waveform on the screen, indicating that the output frequency changes in “steps”. At this point, press to open the 2/2 menu page. Press

StepNum and use the numeric keyboard or knob to input the step number. The default is 2 and the range is from 2 to 2048. Note: in “Linear” and “Log” sweep modes, StepNum is grayed out and disabled.

Figure 6-3 Step Sweep

Sweep Time

When Sweep is enabled, press SwpTime and use the numeric keyboard or knob to change the sweep time. The default value is 1s and the available range is from

1ms to 300s. The generator will renewedly sweep and output from the specified

“Start Frequency” once the sweep time is changed.

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Chapter 6 Sweep

Return Time

The generator will always sweep from “Start Frequency” to “End Frequency” and stay within “End Hold” time. Return time describes the time needed for the output to return to “Start frequency” from “End frequency” after “End hold”.

When Sweep is enabled, press ReturnTime and use the numeric keyboard or knob to change the return time. The default value is 0s and the available range is from 0s to 300s.

The generator will renewedly sweep from the specified “Start Frequency” once the return time is changed.

Mark Frequency

The sync signal on the [Sync] connector corresponding to the channel at the front panel always changes from low-level to high-level at the start of each sweep, and changes from high-level to low-level at the middle of the sweep period when

“Mark” function is disabled or at the specified mark frequency point when “Mark” function is enabled.

When Sweep is enabled, press MarkFreq and select “On”, as shown in the figure below, use the numeric keyboard or knob to modify the mark frequency. The default value is 550Hz and the available range is limited by “Start Frequency” and

“End Frequency”.

The generator will renewedly sweep and output from the specified “Start

Frequency” once the Mark Frequency is changed.

Note: in step sweep mode, MarkFreq is grayed out and disabled.

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Figure 6-4 Mark Frequency

Start Hold

Start Hold is the duration that the output signal outputs with the “Start Frequency” after the sweep starts. After the Start Hold, the generator will output with varying frequency in the current sweep type.

When Sweep is enabled, use to open the 2/2 menu page, then press Start

Hold and use the numeric keyboard or knob to change the Start Hold. The default value is 0s and the available range is from 0s to 300s.

The generator will renewedly sweep and output from the specified “Start

Frequency” once the Start Hold is changed.

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Chapter 6 Sweep

End Hold

End Hold is the duration that the output signal outputs with the “End Frequency” after the generator has swept from the “Start Frequency” to the “End Frequency”.

When Sweep is enabled, use to open the 2/2 menu page, then press End

Hold and use the numeric keyboard or knob to change the End Hold. The default value is 0s and the available range is from 0s to 300s.

The generator will renewedly sweep and output from the specified “start frequency” once the End Hold is changed.

Sweep Trigger Source

The Sweep trigger source could be internal, external or manual. The generator will generate a sweep output when a trigger signal is received and then wait for the next trigger.

When Sweep is enabled, use to open the 2/2 menu page and press Source to select “Int”, “Ext” or “Manual”. The default is “Int”.

1. Internal Trigger

The generator outputs continuous sweep waveform. The trigger period is determined by the specified sweep time, return time, start hold and end hold times.

2. External Trigger

The generator accepts the trigger signal input from the [Mod/FSK/Trig] connector at the rear panel. A sweep will be generated once the connector gets a TTL pulse with specified polarity. To set the TTL pulse polarity, press

SlopeIn to select “Leading” or “Trailing”. The default is “Leading”.

Note that in “Int” and “Manual” trigger modes, the corresponding menu is

TrigOut. The [Mod/FSK/Trig] connector at the rear panel is used as the output terminal of trigger signal.

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[Mod/FSK/Trig]

3. Manual Trigger

A sweep will be generated from the corresponding channel once you press

Trigger1 or Trigger2 at the front panel.

Trigger Output Edge

In Sweep mode, when “Int” or “Manual” trigger source is selected, the generator will output a TTL compatible signal with specified edge from the [Mod/FSK/Trig] connector at the rear panel.

[Mod/FSK/Trig]

 Internal Trigger: the generator outputs a Square waveform with 50% duty cycle from the [Mod/FSK/Trig] connector at the beginning of the Sweep.

The trigger period depends on the specified sweep time, return time, start hold and end hold.

 Manual Trigger: the generator outputs a Pulse waveform with greater than

1μs pulse width at the beginning of the Sweep from the [Mod/FSK/Trig] connector.

 External Trigger: the [Mod/FSK/Trig] connector is used as the input terminal of external trigger signal and has no trigger output.

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When “Int” or “Manual” trigger is selected, press TrigOut to set the edge type of the trigger output signal. The default is “Off”.

 Off: disable the trigger output signal.

 Leading: output the trigger signal at the rising edge.

 Trailing: output the trigger signal at the falling edge.

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Chapter 7 Burst

DG4000 can output waveform with specified number of cycles (called Burst) from a single channel or from dual channels at the same time. DG4000 supports control of burst output by internal, manual or external trigger source; supports three kinds of burst types including N cycle, infinite and gated. The generator can use Sine,

Square, Ramp, Pulse, Noise (only for gated burst) or arbitrary waveform (except

DC) to generate burst.

Subjects in this chapter:

 To Enable Burst Mode

 Burst Type

 Burst Phase

 Burst Period

 Gated Polarity

 Burst Delay

 Burst Trigger Source

 Trigger Output Edge

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To Enable Burst Mode

Press Burst at the front panel to enable Burst function (the backlight of the key goes on), and Mod or Sweep function will be automatically disabled (if currently enabled). The generator will output burst waveform from the corresponding channel (if currently turned on) according to the current configuration. You can also reset the burst function menu. Please refer to the introduction in the following text for details.

Burst Type

DG4000 could output three types of bursts, including N Cycle, Infinite and

Gated. The default is N Cycle.

Table 7-1 Relations among burst type, trigger source and carrier waveform

Burst Type Trigger Source Carrier Waveform

N Cycle Int/Ext/Manual Sine/Square/Ramp/Pulse/Arbitrary waveform

(except DC)

Infinite Ext/Manual Sine/Square/Ramp/Pulse/Arbitrary waveform

(except DC)

Gated Ext Sine/Square/Ramp/Pulse/Noise/Arbitrary waveform (except DC)

N Cycle Burst

In N Cycle mode, the generator will output waveform with specified number of cycles after receiving trigger signal. Waveform functions that support N cycle burst include Sine, Square, Ramp, Pulse and arbitrary waveform (except DC).

For N cycle burst, “Int”, “Ext” or “Manual” trigger source could be used. Besides, users can set the “Start Phase”, “Burst Period” (internal trigger), “Delay”,

SlopeIn” (external trigger) and “TrigOut” (internal and manual triggers).

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When Burst is enabled, press Type to select “N_Cyc”. The parameter “Cycles” on the screen is highlighted and could be edited. At this point, use the numeric keyboard or knob to change the Cycles, the default is 1 and the available range is from 1 to 1 000 000 (external or manual trigger) or 1 to 500 000 (internal trigger).

Figure 7-1 N Cycle Burst

Infinite Burst

In Infinite mode, the cycle number of the waveform is set as an infinite value. The generator outputs a continuous waveform after receiving trigger signal. Waveform functions that support infinite burst include Sine, Square, Ramp, Pulse and arbitrary waveform (except DC).

For infinite burst, “Ext” or “Manual” trigger source could be used. Besides, users can set the “Start Phase”, “Delay”, “SlopeIn” (external trigger) and “TrigOut

(manual trigger).

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Chapter 7 Burst

When Burst is enabled, press Type to select “Infinite” and the instrument will set the trigger source to “Manual” automatically. An infinite cycle pulse sketch will appear on the screen.

Figure 7-2 Infinite Burst

Gated Burst

In Gated Mode, the generator controls the waveform output according to the external signal level from the [Mod/FSK/Trig] connector at the rear panel.

Waveform functions which support Gated Burst are Sine, Square, Ramp, Pulse,

Noise and arbitrary waveforms (except DC).

When the gated signal is “True”, the generator outputs a continuous waveform; when the gated signal is “False”, the generator completes the current period, and then stops and holds on the voltage level corresponding to the initial burst phase

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Gated Burst could only be triggered by “Ext” trigger source. Users can also set the

“Start Phase”.

When Burst is enabled, press Type to select “Gated” and then press Polarity to set the gated polarity as “Pos” (or “Neg”). The generator outputs burst waveform only when the gated signal is positive.

Figure 7-3 Gated Burst

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Chapter 7 Burst

Burst Phase

Burst phase is defined as the phase of the start point of the burst.

When Burst is enabled, press Start Phase and then use the numeric keyboard or knob to input the desired phase, the default value is 0 ° and the available range is from 0 ° to 360 °.

 For Sine, Square and Ramp, 0 ° is the point where the waveform passes through 0 V (or DC offset value) positively.

 For arbitrary waveform, 0 ° is the first point of the waveform.

 For Pulse and Noise, Start Phase is unavailable.

Burst Period

Burst period is only available for N cycle burst in internal trigger and is defined as the time from the start of a burst to the start of the next burst.

 Burst period ≥ 1μs + waveform period × number of bursts. Here, waveform period is the period of burst function (such as Sine and Square).

 If the burst period is too short, the generator will increase this period automatically to allow the output of the specified number of cycles.

When Burst is enabled, press Type  “N_Cyc” Source “Int”  Burst

Period and use the numeric keyboard or knob to input the desired period value.

The default is 10ms, and the available range is from 2μs to 500s.

Gated Polarity

Polarity is only available in gated burst mode. The instrument outputs burst when the gated signal at the [Mod/FSK/Trig] connector at the rear panel is “High

Level” or “Low Level”.

When Burst is enabled, press Type  “Gated”  Polarity to select “Pos” or

“Neg”. The default is “Pos”.

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Burst Delay

Burst delay is only available for N cycle and infinite burst mode. It is defined as the time from when the generator receives the trigger signal to starts to output the N

Cycle (or Infinite) burst.

When Burst is enabled, press Type  “N_Cyc” or “Infinite”, then press to open the 2/2 menu page and press Delay. Use the numeric keyboard or knob to input the desired delay. The delay is no less than 0s and no greater than 85s. The default is 0s.

Burst Trigger Source

Burst trigger source could be internal, external or manual. The generator will generate a burst output when a trigger signal is received and then wait for the next trigger.

When Burst is enabled, press Source to select “Int”, “Ext” or “Manual”. The default setting is “Int”.

1. Internal Trigger

When internal trigger is selected, the generator can only output N cycle burst and the burst frequency is determined by the “Burst Period”.

2. External Trigger

When external trigger is selected, the generator can output N cycle, infinite or gated burst. The generator accepts the trigger signal from the

[Mod/FSK/Trig] connector at the rear panel. A burst will be generated once the connector receives a TTL pulse with specified polarity. To set the TTL pulse polarity, press SlopeIn to select “Leading” or “Trailing” and the default setting is “Leading”.

Note that in “Int” and “Manual” triggers, the corresponding menu is TrigOut.

The [Mod/FSK/Trig] connector at the rear panel is used as the output terminal of trigger signal.

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Chapter 7 Burst

[Mod/FSK/Trig]

3. Manual Trigger

When manual trigger is selected, the generator can output infinite or gated burst. A burst will be generated from the corresponding channel (if currently turned on) once you press Trigger1 or Trigger2 at the front panel. If the corresponding channel is not turned on, the trigger will be ignored.

Trigger Output Edge

In burst mode, when the trigger source is “Int” or “Manual”, the generator would output a TTL-compatible signal with specified edge from the [Mod/FSK/Trig] connector at the rear panel.

[Mod/FSK/Trig]

 In internal trigger, the generator outputs a square waveform with variable duty cycle (related to the carrier period and number of cycles) from the

[Mod/FSK/Trig] connector at the start of burst. The trigger period is the same with the specified burst period.

 In manual trigger, the generator outputs a pulse with greater than 1μs pulse width from the [Mod/FSK/Trig] connector at the start of burst.

 In external trigger, the [Mod/FSK/Trig] connector is used as the input terminal of external trigger signal and has no trigger output.

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When “Int” or “Manual” trigger is selected, press TrigOut to specify the edge of the trigger output signal and the default is “Off”.

 Off: disable the trigger output signal.

 Leading: output the trigger signal at the rising edge.

 Trailing: output the trigger signal at the falling edge.

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Chapter 8 Counter

DG4000 provides a 7 digits/s counter which can measure various parameters (such as frequency, period, duty cycle, positive pulse width and negative pulse width) of external input signal and support statistic of measurement results. When the statistic function is enabled, the instrument calculates the maximum, minimum, average and standard deviation of the measurement values automatically and displays the variation tendency of the measurement values in “Digital” or “Curve” mode. In addition, the dual channels can still output normally when the counter is enabled.

Subjects in this chapter:

 To Enable the Counter

 To Set the Counter

 Statistic

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Chapter 8 Counter

To Enable the Counter

Press Counter at the front panel (the backlight of the key turns on) to enable counter function and enter counter setting interface as shown in the figure below.

If the counter is currently turned on and the screen displays the counter interface, press Counter again to disable counter function. If the counter is currently turned on and the screen displays interfaces other than the counter interface, press

Counter to switch to the counter interface.

Gate Time Attenuation HF Reject Trigger Sensitivity

Coupling Input Impedance Trigger Level

Figure 8-1 Counter Parameter Setting Interface

Note: the CH2 sync output will be disabled when the counter is enabled.

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To Set the Counter

You need to configure appropriate paremeters for the counter.

1. TrigSens

Set the trigger sensitivity of the measurement system. The default is 50% and the range available is from 0% to 100%.

Press TrigSens. Use the numeric keyboard to input the desired value and select the unit “%” from the pop-up menu.

2. TrigLevel

Set the trigger level of the measurement system. The system triggers and gets the measurement readings when the input signal reaches the specified trigger level. The default is 0V and the range available is from -2.5V to 2.5V.

Press TrigLevel. Use the numeric keyboard to input the desired value and select the desired unit (V or mV) from the pop-up menu.

3. Impedance

Set the input impedance to “50Ω” or “HighZ” and the default is “HighZ”.

4. Coupling

Set the coupling mode of the input signal to “AC” or “DC” and the default is

“AC”.

5. Atten

Set the attenuation coefficient of the input signal to “X1” or “X10”.

6. HFReject

High-frequency reject can be used to filter out the high-frequency components and improve the measurement accuracy in low-frequency signal measurement.

Press HFReject to enable or disable the high-frequency reject function.

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Chapter 8 Counter

Note: enable high-frequency reject when low-frequency signal with lower than 1kHz frequency is measured to filter out high-frequency noise interference; disable high-frequency reject when high-frequency signal with greater than 1kHz frequency is measured.

7. Gate Time

Press Gate Time to set the gate time of the measurement system and the default is “1.310ms”.

GateT1 1.310ms

GateT2

GateT3

10.48ms

166.7ms

GateT4

GateT5

1.342s

10.73s

GateT6 >10ns

8. Measure

Press Measure to select the type of parameter to be measured by the counter.

The counter can measure the following parameters: frequency (“Freq”), period (“Peri”), duty cycle (“Duty”), positive pulse width (“+Width”) and negative pulse width (“–Width”) and the default is “Freq”.

9. Statist

Press Statist to enable or disable statistic function. For detail information, please refer to “Statistic”.

10. Auto

Press this key to set the counter parameters automatically.

After the counter parameters are set, the generator measures the external input signal using the preset parameters.

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Statistic

When the statistic function is enabled, the instrument calculates the maximum, minimum, average and standard deviation of the measurement values automatically and displays the variation tendency of the measurement values in

“Digital” or “Curve” mode.

1. To enable the statistic

Press StatistStatist to enable or disable statistic function and the default is “OFF”.

2. To select display mode

After the statistic function is enabled, press Display to set the display mode of the statistic result to “Digital” or “Curve”, as shown in Figure 8-2 and Figure

8-3.

Figure 8-2 Statistic results (in “Digital” display mode)

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Figure 8-3 Statistic results (in “Curve” display mode)

3. To clear the statistic results

Press Clear to remove the current statistic result.

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Chapter 9 Store and Recall

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Chapter 9 Store and Recall

DG4000 can store the current instrument state and user-defined arbitrary waveform data in internal or external memory and recall them when needed.

Subjects in this chapter:

 Storage System Overview

 To Select File Type

 To Select Browser Type

 File Operation

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Chapter 9 Store and Recall

Storage System Overview

DG4000 could store the current instrument state or user-defined arbitrary waveform data in internal or external memory and recall them when needed.

DG4000 provides an internal non-volatile memory (C Disk) and an external memory (D Disk).

 C Disk: provide 10 storage locations (STATE 1 to STATE 10) for state files and

10 storage locations (ARB 1 to ARB 10) for arbitrary waveform files. Users can store instrument states and arbitrary waveform files (created by users or downloaded using remote commands) to C Disk and copy the files in USB storage device to C Disk.

 D Disk: available when USB storage device is detected at the USB Host interface at the front panel.

Press Store (the key backlight goes on) at the front panel to enable the

Store/Recall function and open the Store/Recall interface as shown in the figure below.

Figure 9-1 Store and Recall Interface

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Note that: DG4000 can only identify filenames consist of Chinese characters,

English letters, number and underscore. If other characters are used to name the file or folder, the name might be displayed in the store and recall interface abnormally.

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To Select File Type

Press StoreFile Type to select the desired file type. The file types available include State File, Arb File, Txt File, Csv File and All File.

1. State File

Store the instrument state in internal or external memory in “*.RSF” format. At most 10 instrument states can be stored in internal memory. The 10 instrument states stored correspond to “User1” to “User10” in Utility

Preset (refer to Restore Default).

The state file stored includes waveforms selected, frequency, amplitude, DC offset, duty cycle, symmetry, phase and modulation, sweep, burst parameters used of the two channels and counter parameters.

2. Arb File

Store the user-defined arbitrary waveform in internal or external memory in

“*.RAF” format. At most 10 arbitrary files can be stored in internal memory.

3. Txt File

Read the Txt files stored in external memory. The data of each line (can not be longer than 64 characters) is considered as an arbitray waveform point and the data of all the lines in the file are normalized to form an arbitrary waveform.

The arbitray waveform is stored in volatile memory. The instrument will enter the Arb interface automatically when the “Read” operation is finished.

Note: when “Dir” is selected in Browser, this menu is grayed out and disabled.

4. Csv File

Read the csv files in external memory. The instrument will enter the Arb interface automatically when the “Read” operation is finished. The arbitray waveform is stored in volatile memory.

Note: when “Dir” is selected in Browser, this menu is grayed out and disabled.

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5. All File

Display all the files and folders in the currently selected directory. When this menu is selected, the store function is not available.

To Select Browser Type

Press StoreBrowser to switch between “Dir” and “File”. Use the knob to select the desired directory or file.

 Dir: when this type is selected, use the knob to switch between C Disk and D

Disk (when USB storage device is inserted).

 File: when this type is selected, use the knob to switch files or folders under the current directory.

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File Operation

When “File” is select as the browser type, users can perform a series of operations on files including Save, Read, Copy, Paste, Delete and New Directory.

Save

1. To Select File Type

Follow the introduction in To Select File Type to select the type of files to be saved. Note that if the current File Type is “All File”, the save operation is unavailable.

2. To Open the Filename Input Interface

In Store/Recall interface, set the Browser as “File” and then press Save to enter the filename input interface as shown in the figure below.

Filename Input Area Virtual Soft Keyboard

Figure 9-2 Filename Input Interface (English)

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3. To Input Filename

Press InType to select “Chinese” or “English”. The length of the file or folder name is limited within 27 characters.

 English Input (include number input):

Press +/- on the numeric keyboard to switch between uppercase and lowercase.

Use the knob to select the desired character from the “virtual soft keyboard”, then press Select to select the character and the character selected would be displayed in the “Filename Input Area”. Use the same method to input all the characters needed. You can press Delete to delete the character at the cursor currently in the “Filename Input Area”.

 Chinese Input:

Press +/- on the numeric keyboard to switch to lowercase.

Pinyin Input Area Filename Input Area Virtual Soft Keyboard

Chinese Character Display Area

Figure 9-3 Filename Input Area (Chinese)

Use the knob to select the desired character from the “virtual soft keyboard”, then press Select to select the character and the character

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Chapter 9 Store and Recall selected would be displayed in the “Pinyin Input Area”. After inputting the pinyin of a Chinese character, use the numeric keyboard to select the No. of the desired Chinese character (if the desired Chinese character is not currently displayed, use the direction key to open the next page) and the

Chinese character selected would be displayed in the “Filename Input

Area”. Use the same method to input all the Chinese characters needed.

You can press Delete to delete the character in the “Pinyin Input Area” and then the Chinese character at the cursor currently in the “Filename

Input Area”.

4. To Save File

After finishing inputting filename in the filename input interface, press Save, the generator will save the file under the currently selected directory with the specified filename and file type and display corresponding prompt message when the save operation succeeds.

Recall

1. To Select File Type

Follow the introduction in To Select File Type to select the type of file to be recalled. Note that if the current File Type is “All File”, the file to be recalled is the currently selected file.

2. To Select the File to be Recalled

Set Browser as “Dir” and use the knob to select the directory in which the file to be recalled is stored. Then set Browser as “File”, and use the knob to select the file to be recalled.

3. To Recall File

Press Read, the generator will read the currently selected file and display corresponding prompt message when the read operation succeeds.

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Copy

1. To Select the File to be Copied

Set Browser as “Dir” and use the knob to select the directory in which the file to be copied is stored. Then set Browser as “File”, and use the knob to select the file to be copied.

2. To Copy File

Press Copy, the generator will copy the file currently selected.

Paste

1. To Copy a File

Copy a file following the introduction in Copy .

2. To Select Paste Destination

Set Browser as “Dir” and use the knob to select a paste destination directory.

3. To Paste File

Press Paste, the generator will paste the copied file in the directory currently marked by the cursor and display corresponding prompt message when the paste operation succeeds.

Delete

1. To Select File or Folder to be Deleted

Set Browser as “Dir” and use the knob to select the directory in which the file or folder to be deleted is stored. Then set Browser as “File”, and use the knob to select the file or folder to be deleted.

2. To Delete File or Folder

Press Delete, the generator will delete the currently selected file or folder

(empty folder).

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New Directory

DG4000 allows users to create new folders in external memory. Please make sure that a USB storage device is inserted and identified by the instrument.

1. To Select Memory

In Store/Recall interface, set Browser as “Dir” and use the knob to select “D disk”.

2. New Directory

Set Browser as “File”, use to open the 2/2 menu page and press New

Directory to enter the folder name input interface ( same as shown in Figure

9-2 or Figure 9-3).

Note: when “C Disk” is selected, this menu is unavailable.

3. To Input Folder Name

Input the new folder name following the introduction in Save .

4. To Save Folder

After finishing inputting the new folder name in the folder name input interface, press Save and the generator will create a new empty folder under the current directory.

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Chapter 10 Utility and System Settings

DG4000 allows users to configure the parameters of dual channels, configure remote interfaces and set system parameters.

Subjects in this chapter:

 Overview

 Channel Setting

 To Configure the Remote Interface

 System Setting

 Print

 Channel Coupling

 Channel Copy

 User-defined Waveform Key

 Restore Default

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Overview

Press Utility at the front panel to open the operation interface as shown in the figure below. This interface displays the current channel output configuration, channel coupling configuration and system parameters.

Figure 10-1 Utility Interface

1. CH1Set: set the output parameters of CH1.

2. CH2Set: set the output parameters of CH2.

3. I/O Setup: set the I/O interface parameters.

4. System: set the system parameters.

5. Print: set parameters related to screen print.

6. Coupling: set channel coupling parameters.

7. CH Copy: set channel copy parameters.

8. UserKey: define the shortcut of frequently used built-in waveform.

9. Preset: restore the generator to its default state or user-preset states.

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Channel Setting

This section takes CH1 for example to illustrate how to set the channel. The setting method for CH2 is quite the same.

Sync

DG4000 could output the sync signals of basic waveforms (except Noise), arbitrary waveforms (except DC), Harmonics, Sweep signal, Burst signal and modulated signal from a single channel or two channels at the same time. The sync signal is output from the [Sync] connector at the front panel.

[Sync]

Figure 10-2 [Sync] Connector

1.

Sync On/Off

Enable or disable sync signal at the [Sync] connector. Press Utility

CH1SetSync to select “On” or “Off” for the sync signal output. The default is “On”, namely transmitting the sync signal to the [Sync] connector.

If sync signal is disabled, the output level at the [Sync] connector is logic low.

2.

Sync Signals of Various Waveforms

 For Sine, Square, Ramp and Pulse, the sync signal is a Square with 50% duty cycle. It is TTL high level relative to 0V (or DC offset) when the output is positive and TTL low level relative to 0V (or DC offset) when the output is negative.

 For arbitrary waveform, the sync signal is a square with 50% duty cycle.

The sync signal is TTL high level when the generator outputs the first downloaded waveform point.

 For harmonics, sync signal is a square with variable duty cycle and takes the harmonic order as reference.

 For AM, FM, PM and PWM, in internal modulation mode, the sync signal is

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Chapter 10 Utility and System Settings a Square with 50% duty cycle and takes modulating frequency as reference. It is TTL high level in the first half period of the modulation waveform. In external modulation mode, there is no sync signal output.

 For ASK, FSK, PSK, BPSK, QPSK, 3FSK and 4FSK, the sync signal takes

ASK/FSK/PSK/BPSK/QPSK/3FSK/4FSK Rate as reference and is a Square with 50% duty cycle. For ASK, FSK and PSK, in external modulation mode, there is no sync signal output.

 For OSK, the sync signal is a square with 50% duty cycle and takes OSK rate as reference. The sync signal is TTL high level when the internal crystal oscillator starts to oscillate. In external modulation mode, there is no sync signal output.

 For Sweep, when “Mark” is disabled, the sync signal is a Square with 50% duty cycle. It is TTL high level at the start of the sweep and changes to

TTL low level at mid-point of the Sweep and its frequency corresponds to the specified sweep time, return time, start hold and end hold times.

When “Mark” is enabled, the sync signal is TTL high level when sweep starts and transforms to TTL low level at the marked frequency point.

 For a N cycle burst, the sync signal is TTL high level when burst starts and transforms to TTL low level while the specified number of cycles end (if the waveform has a relative start phase, the crossing point may not be zero). For an infinite burst, its sync signal is the same as the sync signal of a continuous waveform.

 For an external Gated burst, its sync signal follows its gated signal. Note that the sync signal will not transform to TTL low level until the last period is finished (if the waveform has a relative start phase, the crossing point may not be zero).

Sync Polarity

Set the sync signal on the [Sync] connector as normal or inverted.

Press UtilityCH1SetPolarity to select “Pos” or “Neg”.

 Pos: output normal sync signal.

 Neg: output inverted sync signal.

Notice that the sync signal related to the waveform is not inverted even when the waveform is inverted.

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Output Polarity

Set the signal on the [Output1] connector as normal or inverted. Waveform inverts relatively to the offset voltage.

Press UtilityCH1SetOutput to select “Normal” or “Invert”. The default is

“Normal”. The waveform of the first half period of the cycle is positive in “Normal” mode and negative in “Invert” mode.

Normal Invert Normal Invert

0 V

Offset

0 V

Pay attention to the following after the waveform inverts:

 None of the offset voltage would change.

 Waveform is not inverted in graphic mode.

 Sync signal related to the waveform is not inverted.

Resistance Setting

Resistance setting is applicable to output amplitude and DC offset voltage. DG4000 has a 50Ω fixed serial output resistance for the [Output1] connector at the front panel. If the actual load does not match the specified value, the voltage level displayed would not match the voltage level of the component under test. To ensure correct voltage level, the load resistance setting must match the actual load.

Press UtilityCH1SetResi to select “HighZ” or “Load”. The default is

“HighZ”. If “Load” is selected, use the numeric keyboard to set specific resistance value. The default is 50Ω and the available range is from 1Ω to 10kΩ. Resistance setting will be displayed on the screen. As shown in the figure below, CH1 resistance setting is a specified value “50 Ω” and CH2 resistance setting is “HighZ”.

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Figure 10-3 Resistance Setting

The generator will adjust the output amplitude and offset voltage automatically once the resistance setting is changed. For example, the current amplitude is 5Vpp.

At this point, change the output resistance from 50Ω to HighZ and the amplitude displayed on the screen will double to 10Vpp. If the output resistance is changed from HighZ to 50Ω, the amplitude will reduce to half of the previous value (2.5Vpp).

Notice that only the displayed values change with the parameter and the real output from the generator does not change.

Resistance Setting

Noise Setting

DG4000 supports to superpose a gauss noise onto its output signal. This function is called noise superposition. The signal superposed with noise can be used to test the anti-noise capability of instrument.

Press UtilityCH1SetNoise to enable or disable noise superposition function. The default is “OFF”. When Mod, Sweep or Burst is enabled, this menu is grayed out and disabled.

Noise Scale

Set the percentage of the amplitude of the noise superposed onto the output signal takes up in the signal amplitude.

Press UtilityCH1SetNoise Scale. Use the numeric keyboard to input the desired value and select the unit “%” from the unit menu. The range available is from 0% to 50% and the default is 10%. Note that Noise Scale is grayed out and disabled when noise superposition function is disabled.

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To Configure the Remote Interface

DG4000 is configured with USB and LAN interfaces and supports users to configure the interface parameters for remote communication.

Press UtilityI/O Setup to open the I/O setting menu and set the LAN interface parameters for remote communication or select the type of device connected to the USB interface.

LAN Setting

Press UtilityI/O SetupLAN to open the LAN parameters configuration interface as shown in the following figure. Users can examine network status and configure network parameters.

Current IP Configure Mode

Network Status

IP Configure Mode status

MAC Address

VISA Descriptor

Figure 10-4 LAN Setting Interface

Network Status

Different prompt messages will be provided by the generator based on the current network status.

 Connected: LAN connection is successful.

 Disconnect: LAN connection is unsuccessful.

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MAC Address

MAC (Media Access Control) address, also called hardware address, is used for defining the position of the network device. For a generator, the MAC address is always unique. It is always used to identify the instrument while assigning IP address for instrument. MAC address (48 bits, namely 6 bytes) is usually expressed in hexadecimal format, such as 00-14-0E-42-12-CF.

VISA Descriptor

VISA (Virtual Instrument Software Architecture) is an advanced application programming interface developed by NI (National Instrument) for communications with various instrument buses. It uses the same method to communicate with instruments regardless of the types of the instrument interfaces (GPIB, USB,

LAN/Ehternet or RS232). The GPIB, USB, LAN/Ethernet or RS232 instrument is called “resource”.

VISA descriptor is the resource name and describes the accurate name and location of the VISA resource. If LAN interface is currently used for communication with the instrument, the VISA descriptor is TCPIP0::172.16.2.13::INSTR.

IP Configure Mode

IP configure mode could be DHCP, AutoIP or ManualIP. If the network is disconnected currently, there will be nothing to display behind “IP Configure

Mode:”. In different IP configuration modes, the configuration modes of network parameters (such as IP address) are different.

1. DHCP

 In DHCP mode, DHCP server in the current network assigns LAN parameters, e.g. IP address, for the generator.

 Press DHCP to select “On” or “Off” to turn DHCP mode on or off.

2. AutoIP

 In AutoIP mode, the generator acquires IP address within 169.254.0.1

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 Press AutoIP to select “On” or “Off” to turn AutoIP mode on or off. To enable this mode, set DHCP as “Off”.

3. ManualIP

 In ManualIP mode, the LAN parameters of the generator, e.g. IP address, are defined by users.

 Press ManualIP to select “On” or “Off” to turn ManualIP mode on or off.

To enable this mode, set DHCP and AutoIP as “Off”.

 The IP address format is nnn.nnn.nnn.nnn. The first nnn ranges from 0 to

223 (except 127) and the other three nnn range from 0 to 255. It is recommended that users acquire an available IP from their network administrator.

 Press IP Address and use the numeric keyboard and direction keys to enter your desired IP. The setting is stored in non-volatile memory and will be loaded automatically when the generator is powered on the next time if DHCP and AutoIP are set as “Off”.

Tips

 If all the three IP configuration modes are “On”, the priority of parameters configuration from high to low is “DHCP”, “AutoIP” and

“ManualIP”.

 The three IP configuration modes cannot be set as “Off” at the same time.

To Set Subnet Mask

In ManualIP mode, the subnet mask could be manually set.

 The format of subnet mask is nnn.nnn.nnn.nnn, where nnn ranges from 0 to

255. It is recommended that users acquire an available subnet mask from their network administrator.

 Press SubMask and use the numeric keyboard and direction keys to enter your desired subnet mask. The setting is stored in non-volatile memory and will be automatically loaded when the generator is powered on the next time if

DHCP and AutoIP are set as “Off”.

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To Set Default Gateway

In ManualIP mode, the default gateway could be manually set.

 The format of default gateway is nnn.nnn.nnn.nnn, where the first nnn ranges from 0 to 223 (except 127) and the other three nnn range from 0 to 255.

It is recommended that users acquire an available default gateway from their network administrator.

 Press Default Gateway and use the numeric keyboard and direction keys to enter your desired gateway address. The setting is stored in non-volatile memory and will be automatically loaded when the generator is powered on the next time if DHCP and AutoIP are set as “Off”.

To Set Domain Name Server (DNS)

In ManualIP mode, the DNS could be manually set.

 The DNS format is nnn.nnn.nnn.nnn, where the first nnn ranges from 0 to 223

(except 127) and the other three nnn range from 0 to 255.

It is recommended that users acquire an available DNS address from their network administrator.

 Press DNS Server and use the numeric keyboard and direction keys to enter your desired DNS address. The setting is stored in non-volatile memory and will be automatically loaded when the generator is powered on the next time if

DHCP and AutoIP are set as “Off”.

To Set Host Name

Consult your network administrator whether you need to use a host name and what is the name.

Press Host Name and use the numeric keyboard and direction keys to enter the host name with up to 16 characters which could consist of letters, numbers, dot and dash. The setting is stored in the non-volatile memory.

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To Set Domain Name

Consult your network administrator whether you need to use a domain name and what is the name.

Press Domain Name and use the numeric keyboard and direction keys to enter the domain name with up to 16 characters which could consist of letters, numbers, dot and dash. The setting is stored in the non-volatile memory.

Default Configuration

Press Default Config and the prompt message “Restore network settings to preset values of LXI?” is displayed. Press OK to restore the network parameters to their default values. By default, DHCP and AutoIP are enabled and ManualIP is disabled.

Current Configuration

Press Current Config to examine the MAC address of the current instrument, the current LAN parameters and LAN status information.

OK

Press Ok to enable the current setting of LAN parameters.

To Set USB Device Type

The USB Device interface at DG4000 rear panel could be connected with PC to control the instrument remotely.

Press UtilityI/O SetupUSB Dev to select “PC”. Users can use PC software to edit arbitrary waveform and download it to the internal memory of the generator.

Users can also use the SCPI commands to control the generator.

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Chapter 10 Utility and System Settings

System Setting

Number Format

You can set the display formats of the decimal point and thousands separator in number parameters. This setting is stored in non-volatile memory. Press Utility

SystemNumber Format to enter the number format setting interface.

 Decimal Point: could be set as dot “.” or comma “,” and the default is dot “.”.

 Thousands separator: could be set as “On”, “Off” or “Space”. The default is

“On”.

Number format has 6 combinations, as shown in the figure below:

Dot + On (Comma)

Dot + Space

Dot + Off

Comma + On (Dot)

Comma + Space

Comma + Off

Notice: Decimal point and thousands separator cannot be set as dot or comma at the same time.

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Chapter 10 Utility and System Settings

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Language

At present, DG4000 supports simplified Chinese and English system languages, including Chinese/English menu, help information, prompt messages, interface display and Chinese/English input method.

Press UtilitySystemLanguage to select the desired language. This setting is stored in non-volatile memory and will not be influenced by “Preset”.

Power On Setting

Set the configuration to be used when the instrument is powered on the next time to “Default” or “Last”. The default setting is “Default”.

 Last: include all the system parameters, except output configuration, clock source.

 Default: denote the factory default except some parameters (such as:

Language).

Press UtilityPowerOn to select the desired configuration type. This setting is stored in non-volatile memory and will not be influenced by “Preset”.

Power Setting

Set the start-up mode when the generator is powered on to “Auto” or “Manual” and the default is “Auto”.

 Auto: the instrument starts automatically after power-on.

 Manual: users need to press the power switch at the front panel to start the instrument after power-on.

Press UtilityPowerSet to select the desired type.

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Chapter 10 Utility and System Settings

Brightness

Press UtilitySystemLight and use the numeric keyboard or knob to set the brightness of the screen. The range is from 1% to 100%. This setting is stored in non-volatile memory and will not be influenced by “Preset”.

Beeper

When the beeper in DG4000 is enabled, a beep is generated when an error occurs during front panel or remote operation.

Press UtilitySystemBeep to select “On” or “Off” and the default is “On”.

The current setting is stored in non-volatile memory and will not be influenced by

“Preset”.

Screen Saver

Enable or disable screen saver mode.

Press UtilitySystemScrnSvr to select “On” or “Off” and the default is

“Off”. The current setting is stored in non-volatile memory and will not be influenced by “Preset”.

Clock Source

DG4000 provides internal 10MHz clock source and accepts external clock source from the [10MHz In/Out] connector at the rear panel. It can also output clock source from the [10MHz In/Out] connector.

Press UtilitySystemCLK to select “Int” or “Ext”. The default is “Int”. If

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“Ext” is selected, the instrument will detect whether a valid external clock signal is input from the [10MHz Out/In] connector at the rear panel. If no valid clock source is detected, the prompt message “Not detect a valid external clock!” would be displayed and the clock source would be switched to “Int”.

Users can also synchronize two or more instruments by setting the clock source.

When two instruments are synchronized, the “Align Phase” function can not be used. “Align phase” is only applicable to be used to adjust the phase relation between two output channels of the same instrument and can not be used to change the phase relation between the output channels of two instruments. Users can change the phase relation between two instruments by change the “Start

Phase” of each channel.

Sync methods for two or more instruments:

 Synchronization between two instruments:

Connect the [10MHz In/Out] connector of Generator A (“Internal” clock) to the [10MHz In/Out] connector of Generator B (“External” clock) and set the output frequencies of A and B as a same value to realize synchronization between two instruments.

 Synchronization among multi-instruments (Method 1):

Connect the [10MHz In/Out] connector of Generator A (“Internal” clock) to the [10MHz In/Out] connector of Generator B (“External” clock), then connect the [10MHz In/Out] connector of Generator B with the [10MHz

In/Out] connector of Generator C (“External” clock), etc. Finally, set the output frequencies of all the generators as a same value to realize synchronization among multi-instruments.

 Synchronization among multi-instruments (Method 2):

Divide the 10MHz clock source of a Generator (“Internal” clock) into multiple channels, and then connect them to the [10MHz In/Out] connectors of other generators (“External” clock) respectively, and finally set the output frequencies of all the generators as a same value to realize synchronization among multi-instruments.

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Chapter 10 Utility and System Settings

System Information

Press UtilitySystemSys Info and the model, serial number, software,

FPGA, hardware and keyboard version numbers are displayed in the system information interface.

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Print

Users could store the contents displayed on the screen into external USB storage device in picture format. Press UtilityPrint to open print setting interface.

1. To Store Screen to USB Storage Device

Please connect a USB storage device first. When the connection succeeds, an

icon will be displayed in the status bar on the screen and the corresponding prompt message will be displayed.

Press UtilityPrintDest to select “U Disk” and then press U Disk to set to store the screen picture in “Bmp” format.

2. To Execute Print

Press Print at the front panel and the generator will store the screen in USB storage device in picture format according to the preset configuration.

Note: if no USB storage device is currently connected to the generator, the print operation would fail and the prompt message “USB flash driver not detected. Print invalid.” would be displayed.

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Chapter 10 Utility and System Settings

Channel Coupling

DG4000 supports to enable frequency, phase and amplitude couplings separately or at the same time. When coupling is enabled, set CH1 or CH2 as the “base” channel and set the frequency, phase or amplitude deviation of the two channels.

Then when the frequency, phase or amplitude of the base channel is changed, the corresponding parameter of the other channel will change automatically and always keeps the specified frequency, phase or amplitude deviation.

Press Utility at the front panel, use to open the 2/2 menu page and press

Coupling to enter the channel coupling interface.

1. To Set the Coupling Base

Press Base to set “CH1” or “CH2” as the base source of coupling. Here, “CH2” is selected.

Note that the coupling base can not be changed when the coupling function is enabled. At this point, this menu is grayed out and disabled.

2. To Enable Coupling Function

Press Coupling to turn “On” or “Off” the coupling function. The default is

“Off”.

Press FreqCoup to turn frequency coupling “On” or “Off”. After frequency coupling is enabled, use the numeric keyboard to input the desired frequency deviation. Here, it is set to “100Hz”.

Press PhaseCou to turn phase coupling “On” or “Off”. After phase coupling is enabled, use the numeric keyboard to input the desired phase deviation. Here, it is set to “10°”.

Press AmpCoup to turn amplitude coupling “On” or “Off”. After amplitude coupling is enabled, use the numeric keyboard to input the desired amplitude deviation. Here, it is set to “1Vpp”.

Parameter relations between CH1 and CH2:

F

CH1

=F

CH2

+ 100Hz P

CH1

=P

CH2

+ 10° A

CH1

=A

CH2

+ 1Vpp

Green “*” marks are displayed on the left of the frequency, phase and amplitude of the coupling base source as shown in the figure below, indicating that the

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Chapter 10 Utility and System Settings

RIGOL generator is in frequency, phase and amplitude couplings. Change the frequency, phase and amplitude of CH2 to 100Hz, 0° and 1Vpp respectively and the parameters of CH1 will change to 200Hz, 10° and 2Vpp automatically.

Coupling Mark

Figure 10-5 Channel Coupling

Key Points:

 Channel coupling is only available when the waveforms of the two channels are basic waveforms, including Sine, Square, Ramp and Arbitrary waveform

(except DC).

 If the sum of the frequency, phase or amplitude of the base channel and the corresponding deviation set exceeds the upper limit of frequency, phase or amplitude of the non-base channel, the generator will adjust the frequency, phase or amplitude of the non-base channel to avoid parameter overrange.

 The frequency, phase and amplitude of the non-base channel can not be modified directly.

 When the phase of the base channel is changed, the phase (phase displayed on the interface) of the non-base channel will change accordingly. At this point, align phase between the two channels can be realized without executing the

Align Phase operation.

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Chapter 10 Utility and System Settings

 Channel coupling and channel copy are mutually exclusive. The prompt message “Channel copy not allowed in Coupling mode.” would be displayed if users execute channel copy operation (press CH1=CH2 at the front panel) when channel coupling is enabled.

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Channel Copy

DG4000 supports state copy or waveform copy function between its two channels, namely copy the state (parameters and output configuration) or arbitrary waveform parameters of one channel to the other or swap the states of the two channels.

Press UtilityCH Copy to set the parameters of channel copy. This setting will not be affected by the preset operation.

1. Copy Type

Press UtilityCH CopyType at the front panel to set the content of channel copy to “Sate” or “Wave”.

 State: include waveform (except volatile waveform) and waveform parameters (such as frequency and amplitude), functions (such as modulation, sweep and burst) as well as output configurations (such as sync, resistance and polarity) of the channel.

 Wave: arbitrary waveform data (except waveform parameters). Available only when both of the two channels select arbitrary waveforms.

2. Copy Direction

Press UtilityCH CopyDirection to set the direction of channel copy as

“CH1->CH2”, “CH2->CH1” or “Swap” (only available when the copy type is set to “State”, swap the states of CH1 and CH2).

Then, press CH1 CH2 at the front panel under any interface to execute the channel copy operation.

Note:

Channel coupling and channel copy are mutually exclusive. Channel copy (press

CH1 CH2 at the front panel) is forbidden when channel coupling is enabled.

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Chapter 10 Utility and System Settings

User-defined Waveform Key

The User key at the front panel of DG4000 provides a shortcut for users. You can define this shortcut key as the desired built-in waveform. You can recall and set the desired waveform under any operation interface once you press this shortcut key.

Press UtilityUserKey to open the user-defined waveform interface. Use the knob to select the desired waveform (such as: AbsSine) from the interface, use to open the 2/2 menu page and then press Select.

Figure 10-6 User-defined Waveform Interface

At this point, pressing User under any interface would output AbsSine signal from the corresponding channel (if currently turned on) and you can also modify the

AbsSine signal parameters.

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Figure 10-7 Press User Key to Quickly Edit Waveform Parameters

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Chapter 10 Utility and System Settings

Restore Default

Restore the generator to its default state or user-preset states.

 Default State: the parameter values are as shown in the table below. Note that items marked with “*” will not be affected by the preset operation.

 User-preset States: correspond to the 10 state files stored in internal memory.

Press UtilityPreset to select “Default” or one of “User1” to “User10”. Press

Preset at the front panel under any state to switch the instrument to the specified state. Note that before selecting “User1” to “User10”, make sure that valid state file is stored in the corresponding storage location.

Table 10-1 Factory Default Values

Parameters

Channel Parameters

Defaults

Current Carrier Waveform

Output Resistance

Sync Output

Sync Polarity

Output Polarity

Noise

Sine

HighZ

On

Pos

Normal

OFF

Noise Scale

Coupling

Coupling Base

Phase Deviation

Frequency Deviation

Amplitude Deviation

Basic Waveform

Frequency

Amplitude

Amplitude Unit

Offset

Start Phase

10%

Off

CH2

0Hz

0Vpp

1kHz

5Vpp

Vpp

0V

DC

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Chapter 10 Utility and System Settings

Square Duty Cycle

Symmetry

50%

50%

Pulse Duty Cycle

Pulse Width

Pulse Leading Edge

Pulse Trailing Edge

50%

500μs

1.9531μs

1.9531μs

Arb Waveform

Built-in Arbitrary Waveform Sinc

Off Step-By-Step Output

Harmonic

Order

Type

Amplitude

Phase

2

Even

1.264,7Vpp

AM Modulation

Modulation Source

Modulating Waveform

AM Frequency

Modulation Depth

FM Modulation

Modulation Source

Modulating Waveform

FM Frequency

Frequency Deviation

Int

Sine

100Hz

100%

Int

Sine

100Hz

1kHz

PM Modulation

Modulation Source

Modulating Waveform

PM Frequency

Phase Deviation

PWM Modulation

Int

Sine

100Hz

90°

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Modulation Source

Modulating Waveform

Modulating Frequency

Width Deviation

Duty Cycle Deviation

ASK Modulation

Modulation Source

ASK Rate

Modulating Amplitude

ASK Polarity

FSK Modulation

Modulation Source

FSK Rate

Hop Frequency

FSK Polarity

PSK Modulation

Modulation Source

PSK Rate

PSK Phase

PSK Polarity

BPSK Modulation

Rate

Phase

Modulating Waveform

QPSK Modulation

Rate

Phase 1

Phase 2

Phase 3

Modulating Waveform

10-26

Int

100Hz

10kHz

Pos

Int

100Hz

180°

Pos

100Hz

180°

Sine

Int

Pulse

100Hz

200μs

20%

Int

100Hz

2Vpp

Pos

100Hz

45°

135°

225°

Sine

Chapter 10 Utility and System Settings

DG4000 Series User’s Guide

Chapter 10 Utility and System Settings

3FSK Modulation

Key Frequency

Hop Frequency 1

Hop Frequency 2

4FSK Modulation

Key Frequency

Hop Frequency 1

Hop Frequency 2

Hop Frequency 3

OSK Modulation

Modulation Source

Rate

Oscillate Time

Sweep

Sweep Type

Step

Sweep Time

Start Hold

End Hold

Return Time

Start Frequency

End Frequency

Center Frequency

Frequency Span

Mark Frequency

Trigger Source

Trigger Output

Slope Input

Burst

Burst Mode

Cycle Number

Start Phase

100Hz

100Hz

100Hz

100Hz

100Hz

100Hz

100Hz

Int

1kHz

1ns

Linear

2

1s

0s

0s

0s

100Hz

1kHz

550Hz

900Hz

Off

Int

Off

Leading

N Cycle

1

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Delay

Gated Polarity

Trigger Source

Trigger Output

Trigger Input

Trigger Period

System Parameter

DHCP

Auto IP

Manual IP

Beeper

Power On Setting

Screen Saver

Clock Source

Decimal Point

Thousand Separator

Brightness*

Language*

Print

Picture Format

Counter

Sensitivity

Trigger Level

Input Resistance

Coupling

Attenuation

Gate Time

Measurement Item

Statistic Function

Display Format

Chapter 10 Utility and System Settings

0s

Pos

Int

Off

Leading

10ms

On

ON

OFF

ON

Default

ON

Internal

Dot

Comma

Factory Delivery Setting

Factory Delivery Setting

USB Storage Device

Bmp

50%

0V

HighZ

AC

× 1

1.310ms

Frequency

Off

Digital

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Chapter 11 Remote Control

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Chapter 11 Remote Control

Users can control DG4000 through remote interfaces. This chapter provides basic information and method of remote control of the instrument.

Subjects in this chapter:

 Remote Control Overview

 Remote Control Mode

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Chapter 11 Remote Control

Remote Control Overview

DG4000 can communicate with PC through USB or LAN interface to realize remote control on the basis of SCPI commands (Standard Commands for Programmable

Instruments). DG4000 supports SCPI 1999.1.

When the instrument is working in remote mode, the indicator in the upper right corner of the user interface will light and the keys at the front panel are locked. Now you can return the instrument to local mode by pressing Burst.

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Remote Control Mode

Remote control of DG4000 on the basis of SCPI commands mainly contains the following two modes:

1. To control DG4000 by programming

2. To control DG4000 by using PC software

User-defined Programming

Users can program and control DG4000 by using the SCPI commands on the basis of NI-VISA (National Instrument – Virtual Instrument Software Architecture) library.

1. Install NI-VISA Library

You need to install the VISA library of NI (download from http://www.ni.com/visa/) on your PC. NI-VISA is an application program interface developed by NI according to the VISA standards. You can use

NI-VISA to realize the communication between the generator and PC through instrument buses (such as USB). VISA defines a set of software commands with which users can control the instrument without the need to understand how the interface bus works. For details, please refer to NI-VISA Help.

2. Build Communication between Instrument and PC

You need to build the communication between the generator and PC.

 USB Interface: use USB cable to connect the generator and PC. At this point, the hardware update wizard dialog box is displayed. Then, follow the instructions to install the “USB Test and Measurement Device”.

Steps:

1) Select “Install the software automatically (Recommended)”;

2) Click “Next”;

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Chapter 11 Remote Control

1

2

3) Select “Don’t search. I will choose the driver to install”;

4) Click “Next”;

3

4

5) Select “USB Test and Measurement Device”;

6) Click “Next”;

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6

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7) When the installation is finished, click “Finish”.

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Chapter 11 Remote Control

7

 LAN Interface: connect your generator to the local area network of the PC and set the network parameters correctly following the instructions in

LAN Setting.

3. Programming

Then, you can select a familiar software developing tool for programming. The developing tools available include Visual C++ 6.0, Visual Basic 6.0, LabVIEW

8.6 and etc. For detailed information about SCPI commands and programming method of DG4000, refer to DG4000 Programming Guide.

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To Use PC Software

You can control DG4000 remotely by sending SCPI commands using PC software.

PC softwares supported by DG4000 include:

 General PC software Ultra Sigma

of RIGOL

 Measurement & Automation Explore of NI (National Instrument Corporation)

 Agilent IO Libraries Suite of Agilent (Agilent Technologies, Inc.)

This section introduces in details how to use Ultra Sigma to send commands through USB and LAN interfaces to control DG4000. Please refer to Ultra Sigma

Help to install the software and the components required correctly.

1. To Control the Instrument through USB

1) Connect the devices

Connect the generator (use the USB Device interface at the rear panel) with your PC using USB cable.

2) Install the USB drive

As the generator is a USB-TMC device, after you connect the generator to the PC and turn both on, the PC will display the hardware update wizard dialog box. Please install the “USB Test and Measurement Device” driver following the directions of the wizard.

3) Search device resource

Start up Ultra Sigma, the software starts searching the generator resources currently connected to the PC automatically, or click

to search manually. The status bar of Ultra Sigma at present is as shown in the figure below:

4) View the resource

The resources that have been searched successfully are shown under the

“RIGOL Online Resource” catalog and the instrument model and VISA descriptor are also displayed, such as

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Chapter 11 Remote Control

DG4162 (USB0::0x1AB1::0x04B0::DG41620000::INSTR).

5) Communicate Test

Right click the resource name

“DG4162 (USB0::0x1AB1::0x04B0::DG41620000::INSTR)” and select

“SCPI Control Panel” to open the remote command control panel through which users can send commands and read data.

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2. To Control the Instrument through LAN

1) Connect the devices

Connect the generator to your LAN using network cable.

2) Configure LAN parameters

Set the LAN parameters of the generator according to the introductions in

To Configure the Remote Interface.

3) Search device resource

Start-up Ultra Sigma and click , then click in the pop-up window, the software starts searching the generator resources connected to LAN. Instrument resources searched will be displayed in the right of the window. Select your desired resource and click , as shown in the following figures.

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Chapter 11 Remote Control

4) View the resource

The resources that have been searched successfully are shown under the

“RIGOL Online Resource” catalog and the instrument model and VISA descriptor are also displayed, such as

DG4162 (TCPIP::172.16.3.16::INSTR).

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5) Communication test

Right click the resource name “DG4162 (TCPIP::172.16.3.16::INSTR)” and select “SCPI Control Panel” to open the remote command control panel through which users can send commands and read data.

6) Load LXI webpage

The generator conforms to LXI-C standards. You can load LXI webpage conveniently through Ultra Sigma (right-click the resource name and

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Chapter 11 Remote Control select “LXI-Web”). On the webpage, some important information about the generator such as the model, manufacturer, serial number, description, MAC address and IP address is shown.

Tip

You can also load LXI webpage by input the IP address of the generator in the address bar of the PC browser.

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Chapter 12 Troubleshooting

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Chapter 12 Troubleshooting

This chapter lists the commonly encountered failures of DG4000 and their solutions. When you encounter those problems, please solve them following the corresponding steps. If the problem persists, please contact RIGOL and provide your device information (Utility SystemSys Info).

1. The screen is still dark (no display) after power on:

(1) Check if the power is correctly connected.

(2) Check if the power switch is really on.

(3) Restart the instrument after finishing the above inspections.

(4) If it does not work correctly, contact RIGOL for our service.

2. The settings are correct but no waveform is generated

(1) Check if the BNC cable is correctly connected to the channel output terminal ([Output1] or [Output2]).

(2) Check if the BNC cable can work correctly.

(3) Check the Output1 or Output2 button, if it is turned on.

(4) Set PowerOn as “Last” and then restart the instrument after finishing the above inspections.

(5) If it does not work correctly, contact RIGOL for our service.

3. The USB storage device cannot be recognized:

(1) Check if the USB storage device can work normally.

(2) Make sure the USB storage device is USB flash storage device. The generator doesn’t support hard drive-based USB storage device.

(3) Restart the instrument, reinsert the U-disk and check it.

(4) If the USB storage device still can not be recognized, please contact

RIGOL.

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Chapter 13 Specifications

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Chapter 13 Specifications

All the specifications can be guaranteed if the following two conditions are met unless where noted.

 The generator is within the calibration period and has performed self-calibration.

 The generator has been working continuously for at least 30 minutes under the specified temperature (18°C ~ 28°C).

All the specifications are guaranteed unless those marked with “typical”.

Model

Channel

Maximum Frequency

Sample Rate

Waveforms

Standard waveforms

DG4162

2

160MHz

500MSa/s

DG4102

2

100MHz

DG4062

2

60 MHz

Sine, Square, Ramp, Pulse, Noise, Harmonics

Arbitrary Waveforms 150 kinds, including Sinc, Exponential Rise, Exponential Fall, ECG,

Gauss, HaverSine, Lorentz, Dual-Tone, DC, etc.

Frequency Characteristics

Sine

Square

Ramp

Pulse

Harmonic

Noise (-3dB)

1μHz to 160MHz

1μHz to 50MHz

1μHz to 4MHz

1μHz to 40MHz

1μHz to 100MHz

1μHz to 40MHz

1μHz to 3MHz

1μHz to 25MHz

1μHz to 60MHz

1μHz to 25MHz

1μHz to 1MHz

1μHz to 15MHz

1uHz to 80MHz 1uHz to 50MHz 1uHz to 30MHz

120MHz bandwidth 80MHz bandwidth 60MHz bandwidth

Arbitrary Waveform

Resolution

Accuracy

1μHz to 40MHz 1μHz to 25MHz

1μHz

± 2ppm,18°C to 28°C

Sine Wave Spectrum Purity

Harmonic Distortion Typical (0dBm)

DC-1MHz: <-60dBc

1μHz to 15MHz

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Chapter 13 Specifications

Total Harmonic Distortion

Spurious (non-harmonic)

Phase Noise

1MHz-10MHz: <-55dBc

10MHz-100MHz: <-50dBc

100MHz-160MHz: <-40dBc

<0.1% (10Hz-20kHz,0dBm)

Typical (0dBm)

10MHz <-65dBc

>10MHz <-65dBc+6dB/octave

Typical (0dBm, 10kHz deviation)

10MHz: ≤-115dBc/Hz

Signal Characteristics

Square

Rise/Fall Time

Overshoot

Duty Cycle

Non-symmetry

Jitter (rms)

Typical (1Vpp)

<8ns

Typical (100KHz, 1Vpp)

Typical (1Vpp)

<10ns

<3%

≤10MHz: 20.0% to 80.0%

10MHz-40MHz: 40.0% to 60.0%

>40MHz: 50.0% (fixed)

1% of period +5ns

Typical (1Vpp)

5MHz 2ppm+500ps

> 5MHz 500ps

Ramp

Linearity

Symmetry

Pulse

Period

Typical (1Vpp)

<12ns

≤1% of peak output (Typical, 1kHz, 1VPP, 100% Symmetry)

0% to 100%

Pulse Width

Leading/

Trailing Edge Time

Overshoot

25ns to 1000000s 40 ns to 1000000 s 66.7 ns to

1000000 s

≥10ns

≥5ns

≥12ns

≥7ns

≥18ns

≥11ns

Jitter (rms)

Typical (1Vpp)

<3%

Typical (1Vpp)

5MHz 2ppm+500ps

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> 5MHz 500ps

Arb

Waveform Length

Vertical Resolution

Sample Rate

Minimum Rise/Fall Time

Jitter (rms)

16k points

14bits

500MSa/s

Typical (1Vpp)

<5ns

Typical (1Vpp)

5MHz 2ppm+500ps

> 5MHz 500ps

Off, Linear

Edit Points, Edit Block

Interpolation Method

Edit Method

Harmonic

Harmonic Order

Harmonic Type

Harmonic Amplitude

Harmonic Phase

Output Characteristics

Amplitude (into 50 Ω)

Range

≤16

Even, Odd, All, User can be set for all harmonics can be set for all harmonics

Accuracy

Flatness

(relative to 1kHz Sine wave,

500 mVpp, 50Ω)

Units

Resolution

≤20MHz: 1mVpp to 10Vpp

≤70MHz: 1mVpp to 5Vpp

≤120MHz: 1mVpp to 2.5Vpp

≤160MHz: 1mVpp to 1Vpp

≤20MHz: 1mVpp to

10Vpp

≤70MHz: 1mVpp to

5Vpp

≤100MHz: 1mVpp to 2.5Vpp

≤20MHz: 1mVpp to

10Vpp

≤60MHz: 1mVpp to

5Vpp

Typical (1kHz Sine, 0V Offset, >10mVpp, Auto)

± 1% of setting ± 2mV

Typical

≤10MHz:± 0.1dB

≤60MHz:± 0.2dB

≤100MHz:± 0.4dB

≤160MHz:± 0.8dB

Typical

≤10MHz:± 0.1dB

≤60MHz:± 0.2dB

≤100MHz:± 0.4dB

Typical

≤10MHz:± 0.1dB

≤60MHz:± 0.2dB

Vpp, Vrms, dBm

1mV or 3bits

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Chapter 13 Specifications

Offset (into 50 Ω)

Range

Accuracy

Waveform Output

Impedance

± 5Vpk ac + dc

1% of setting + 5mV + 0.5% of amplitude

50Ω (Typical)

Protection

Modulation Characteristics

Modulation Type

AM

Short-circuit protection, automatically disable waveform output when overload occurs

AM, FM, PM, ASK, FSK, PSK, BPSK, QPSK, 3FSK, 4FSK, OSK, PWM

Carrier Waveform

Source

Modulating Waveform

Depth

Modulating Frequency

FM

Carrier Waveform

Source

Modulating Waveform

Modulating Frequency

PM

Carrier Waveform

Sine, Square, Ramp, Arb (except DC)

Internal/External

Sine, Square, Ramp, Noise, Arb

0% to 120%

2mHz to 50KHz

Sine, Square, Ramp, Arb (except DC)

Internal/External

Sine, Square, Ramp, Noise, Arb

2mHz to 50KHz

Sine, Square, Ramp, Arb (except DC)

Internal/External

Sine, Square, Ramp, Noise, Arb

0° to 360°

2mHz to 50KHz

Source

Modulating Waveform

Phase Deviation

Modulating Frequency

ASK

Carrier Waveform

Source

Modulating Waveform

Key Frequency

FSK

Carrier Waveform

Source

Modulating Waveform

Sine, Square, Ramp, Arb (except DC)

Internal/External

Square with 50% duty cycle

2mHz to 1MHz

Sine, Square, Ramp, Arb (except DC)

Internal/External

Square with 50% duty cycle

13-4

DG4000 Series User’s Guide

Chapter 13 Specifications

Key Frequency

3FSK

Carrier Waveform

Source

Modulating Waveform

Key Frequency

4FSK

Carrier Waveform

Source

Modulating Waveform

Key Frequency

PSK

Carrier Waveform

Source

Modulating Waveform

Key Frequency

BPSK

Carrier Waveform

Source

Modulating Waveform

Key Frequency

QPSK

Carrier Waveform

Source

Modulating Waveform

Key Frequency

OSK

Carrier Waveform

Source

Oscillation Time

Key Frequency

PWM

Carrier Waveform

Source

Modulating Waveforms

Width Deviation

2mHz to 1MHz

Sine, Square, Ramp, Arb (except DC)

Internal

Square with 50% duty cycle

2mHz to 1MHz

Sine, Square, Ramp, Arb (except DC)

Internal

Square with 50% duty cycle

2mHz to 1MHz

Sine, Square, Ramp, Arb (except DC)

Internal/External

Square with 50% duty cycle

2mHz to 1MHz

Sine, Square, Ramp, Arb (except DC)

Internal

Sine, Square, Ramp, Noise, Arb (2mHz to 50kHz)

2mHz to 1MHz

Sine, Square, Ramp, Arb (except DC)

Internal

Sine, Square, Ramp, Noise, Arb (2mHz to 50kHz)

2mHz to 1MHz

Sine

Internal/External

8ns to 200s

2mHz to 1MHz

Pulse

Internal/External

Sine, Square, Ramp, Noise, Arb

0% to 100% of Pulse Width

DG4000 Series User’s Guide

RIGOL

13-5

RIGOL

Chapter 13 Specifications

Modulating Frequency

[Mod/FSK/Trig] Input

Input Range

Input Bandwidth

Input Impedance

Burst Characteristics

Carrier Waveform

Carrier Frequency

Burst Count

Start/Stop Phase

Internal Period

Gated Source

Trigger Source

Trigger Delay

Sweep Characteristics

Carrier Waveform

Type

Direction

Start/Stop Frequency

Sweep Time

Hold/Return Time

Trigger Source

Mark

Counter Specifications

Function

2mHz to 50KHz

75mVRMS to ± 2.5Vac+dc

5MHz

100Ω

Sine, Square, Ramp, Pulse, Noise, Arb (except DC)

2mHz to 100MHz 2mHz to 100MHz

1 to 1 000 000 or Infinite

0° to 360°

2μs to 500s

External Trigger

Internal, External or Manual

0ns to 85s

Sine, Square, Ramp, Arb (except DC)

Linear, Log or Step

Up or Down

1μHz to 160MHz

1ms to 300s

0ms to 300s

1μHz to 100MHz

Internal, External or Manual

Falling edge of Sync signal (programmable)

2mHz to 60MHz

1μHz to 60MHz

Frequency, Period, Positive/Negative Pulse Width, Duty Cycle

Frequency Resolution 6 digits/second (Gate Time =1s)

Frequency Range 1μHz to 200MHz

Period Measurement Measurement Range 5ns to 16 days

Voltage Range and Sensitivity (Not modulation signal)

DC Coupling

DC Offset Range

1μHz to 100MHz

± 1.5VDC

50mVRMS to

± 2.5Vac+dc

Input Attenuation:

“closed”

13-6

DG4000 Series User’s Guide

Chapter 13 Specifications

RIGOL

AC Coupling

Frequency/Amplitude

Range

Pulse Width

Duty Cycle

Input Range

Input Adjustment

Input Trigger

Gate Time

100MHz to 200MHz

1μHz to 100MHz

100MHz to 200MHz

100mVRMS to

± 2.5Vac+dc

50mVRMS to ± 2.5Vpp

100mVRMS

± 2.5Vpp to

Pulse Width and Duty Cycle Measurement

1μHz to 25MHz

Minimum

50mVRMS to

± 2.5Vac+dc

≥20ns

Resolution 2ns

DC Coupling

Input Attenuation:

“closed”

Range (Display) 0% to 100%

Input Characteristics

Breakdown Voltage

± 7Vac+dc

(Attenuation: closed)

± 70Vac+dc

(Attenuation: open)

5Vrms

Impedance=1MΩ

Impedance=50Ω

Attenuation

Impedance

Open: “× 10”; Closed: “× 1”

50Ω 1MΩ

Coupling

HF Reject

Trigger Level Range

Trigger

Range

Sensitivity

GateTime1

AC DC

ON: input bandwidth=250KHz;

OFF: input bandwidth=225MHz

-2.5V to +2.5V

0% (140mV hysteresis voltage) to 100%

(2mV hysteresis voltage)

1.310ms

GateTime2

GateTime3

GateTime4

GateTime5

GateTime6

10.48ms

166.7ms

1.342s

10.73s

>10s

DG4000 Series User’s Guide 13-7

RIGOL

Trigger Characteristics

Trigger Input

Level

Slope

Pulse Width

Latency

Trigger Output

Level

Pulse Width

Maximum Rate

Clock Reference

Phase Offset

Range

Resolution

External Reference Input

Lock Range

Level

Lock Time

Impedance (Typical)

Internal Reference Output

Frequency

Level

Impedance (Typical)

Sync Output

Level

Impedance

General Specifications

Power

Power Voltage

Power Consumption

Fuse

Display

TTL-compatible

Rising or falling (selectable)

> 50ns

Sweep: <100ns (typical)

Burst: <300ns (typical)

TTL-compatible

> 60ns (typical)

1MHz

0° to 360°

0.03°

10MHz ± 50Hz

250mVpp to 5Vpp

< 2s

1kΩ, AC coupling

10MHz ± 50Hz

3.3Vpp

50Ω, AC coupling

TTL-compatible

50 Ω, nominal value

100V to 240V (45Hz to 440Hz)

Less than 50W

250V, T2A

Chapter 13 Specifications

13-8

DG4000 Series User’s Guide

Chapter 13 Specifications

Type

Resolution

Color

Environment

Temperature Range

7-inch TFT LCD

800 Horizontal × RGB × 480 Vertical Resolution

16M color

Cooling Method

Humidity Range

Altitude

Operating: 10℃ to 40℃

Non-Operating: -20℃ to 60℃

Cooling by fans compulsively

Less than 35℃: ≤90% Relative Humidity (RH)

35℃ to 40℃: ≤60% Relative Humidity (RH)

Operating: Less than 3000 meters

Non-Operating: Less than 15000 meters

Mechanical

Dimensions (W× H× D)

Weight

313 mm × 160.7 mm× 116.7mm without package: 3.2 kg with package: 4.5 kg

Interfaces

USB Host, USB Device, LAN

IP Protection

IP2X

Calibration Interval

Recommend 1 year for standard interval

RIGOL

DG4000 Series User’s Guide 13-9

Chapter 14 Appendix

RIGOL

Chapter 14 Appendix

Appendix A: Options and Accessories

Description Order Number

Model

DG4162 (160 MHz, dual-channel)

DG4102 (100 MHz, dual-channel)

DG4162

DG4102

DG4062 (60 MHz, dual-channel) DG4062

Power Cord

USB Cable

-

CB-USB

Standard

Accessories

BNC Cable (1 meter)

Quick Guide

CB-BNC-BNC-1

-

Resource CD (including User’s Guide and

Application Software)

Warranty Card

-

Options

40dB Attenuator

Rack Mount Kit

-

ATT-40dB

RMK-DG-4

NOTE: All the options or accessories can be ordered from you local RIGOL Office.

DG4000 Series User’s Guide 14-1

RIGOL

Chapter 14 Appendix

Appendix B: Warranty

RIGOL warrants that the mainframe and accessories of its product will be free from defects in materials and workmanship within the warranty period.

If the product is proven to be defective within the warranty period, RIGOL guarantees free replacement or repair of the product. For detailed warranty rules, please refer to the RIGOL official website or the instruction in the warranty card. To get repair service or a complete version of the warranty instruction, please contact

RIGOL maintenance center and local office.

RIGOL does not provide any other explicit or implicit warranty items including but not limited to any implicit warranty items about tradability and applicability for special purpose of the product, except the ones being provided by this summary and other applicable warranty cards. RIGOL will shoulder no responsibility for indirect, special or consequential damage.

14-2

DG4000 Series User’s Guide

Chapter 14 Appendix

Appendix C: Any Comment or Question?

If you have any comment or question on our document, please mail to: [email protected]

RIGOL

DG4000 Series User’s Guide 14-3

Index

Index

3FSK ....................................... 5-25

4FSK ....................................... 5-27

Align Phase ................................ 2-9

AM ............................................ 5-2 amplitude coupling .................. 10-18

ASK ......................................... 5-11

ASK Rate ................................. 5-12

AutoIP ..................................... 10-8

BPSK ....................................... 5-20

BPSK Rate ................................ 5-21

Center Frequency ................ 6-1, 6-3

Channel Copy ......................... 10-21

Copy.......................................... 9-9

Coupling Base ........................ 10-18

Default Gateway ..................... 10-10

Delay ....................................... 2-15

Delete ....................................... 9-9

DHCP....................................... 10-8

DNS ...................................... 10-10

Domain Name ........................ 10-11

Duty Cycle ............................... 2-11

Edge Time ............................... 2-14

Edit Block ................................. 3-11

Edit Points ................................ 3-11

End Frequency ........................... 6-2

End Hold .................................. 6-10

FM ............................................ 5-5 frequency coupling .................. 10-18

Frequency Deviation ................... 5-7

Frequency Span .......................... 6-3

Frequency Sweep ....................... 6-2

FSK ......................................... 5-14

FSK Rate .................................. 5-16

Gated Burst ................................ 7-4

DG4000 Series User’s Guide

RIGOL

Host Name ............................. 10-10

Infinite Burst ............................. 7-3

Linear ...................................... 3-11

Linear Sweep ............................. 6-4

Log Sweep ................................. 6-5

MAC Address ............................ 10-8

ManualIP .................................. 10-9

Mark Frequency ......................... 6-8

Modulation Depth ....................... 5-4

N Cycle ..................................... 7-2

Network Status ......................... 10-7

New Directory ........................... 9-10

Noise Scale ............................... 10-6 noise superposition .................... 10-6

Oscillate Period ......................... 5-31

OSK ......................................... 5-29

Paste ........................................ 9-9 phase coupling ........................ 10-18

Phase Deviation ........................ 5-10

PM ............................................ 5-8

PSK .......................................... 5-17

PSK Rate .................................. 5-18

Pulse Width .............................. 2-13

PWM ........................................ 5-32

QPSK ....................................... 5-23

QPSK Rate ................................ 5-24

Recall ........................................ 9-8

Recover Delay ........................... 2-15 remote control .......................... 11-2

Save ................................. 9-6, 9-10

Start Frequency.................... 6-1, 6-2

Start Hold .................................. 6-9

Step Sweep ............................... 6-6

Step-By-Step ........................ 3-1, 3-3

1

RIGOL

Subnet Mask ............................ 10-9

Supporting Legs ......................... 1-3

Symmetry ................................ 2-12

Sync ........................................ 10-3

Index

Sync Polarity ............................. 10-4

USB Device ............................... 1-13

USB Host .................................... 1-6

VISA Descriptor ........................ 10-8

2

DG4000 Series User’s Guide

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