UNI-T UTG1000A User Manual

UTG1000A Series Function Generator User Manual

Preface

Dear Users:

Hello! Thank you for choosing this brand new Uni-Trend device. In order to use this instrument safely and correctly, please read this manual thoroughly, especially the Safety Notes part.

After reading this manual, it is recommended to keep the manual at an easily accessible place, preferably close to the device, for future reference.

UTG1000A Series Function Generator User Manual

UNl-T is Uni-Trend Technology (China) Limited. All rights reserved. UNI-T products are protected by patent rights in China and other countries, including issued and pending patents. Uni-Trend reserves the rights to any product specification and pricing changes. Uni-Trend reserves all rights. Licensed software products are properties of Uni-Trend and its subsidiaries or suppliers, which are protected by national copyright laws and international treaty provisions. Information in this manual supercedes all previously published versions. UNI-T is the registered trademark of Uni-Trend Technology (China) Limited. Uni-Trend warrants that this product will be free from defects for a three-year period. If the product is re-sold, the warranty period will be from the date of the original purchase from an authorized UNI-T distributor. Probes, other accessories, and fuses are not included in this warranty.

If the product is proved to be defective within the warranty period, Uni-Trend reserves the rights to either repair the defective product without charging any parts or labor, or exchange the defected product to a working equivalent product. Replacement parts and products may be brand new, or perform at the same specifications as brand new products. All replacement parts, modules, and products are the property of Uni-Trend.

The “customer” refers to the individual or entity that is declared in the guarantee. In order to obtain

the warranty service, "customer" must inform the defects within the applicable warranty period to UNI-T, and to perform appropriate arrangements for the warranty service. The customer shall be responsible for packing and shipping the defective products to the designated maintenance center of UNI-T, pay the shipping cost, and provide a copy of the purchase receipt of the original purchaser. If the product is shipped domestically to the location of the UNI-T service center, UNI-T shall pay the return shipping fee. If the product is sent to any other location, the customer shall be responsible for all shipping, duties, taxes, and any other expenses.

This warranty shall not apply to any defects or damages caused by accidental, machine parts’ wear and

tear, improper use, and improper or lack of maintenance. UNI-T under the provisions of this warranty has no obligation to provide the following services: a) Any repair damage caused by the installation, repair, or maintenance of the product by non UNI-T service representatives. b) Any repair damage caused by improper use or connection to an incompatible device. c) Any damage or malfunction caused by the use of a power source which does not conform to the requirements of this manual.

UTG1000A Series Function Generator User Manual

d) Any maintenance on altered or integrated products (if such alteration or integration leads to an increase in time or difficulty of product maintenance).

This warranty written by UNI-T for this product, and it is used to substitute any other expressed or implied warranties. UNI-T and its distributors do not offer any implied warranties for merchantability or applicability purposes. For violation of this guarantee, UNI-T is responsible for the repair or replacement of defective products is the only remedy available to customers. Regardless of whether UNI-T and its distributors are informed that any indirect, special, incidental, or consequential damage may occur, the UNI-T and its distributors shall not be responsible for any of the damages.

Warranty

UNI-T warrants that the product will be free from defects for a three-year period. If the product is re-sold, the warranty period will be from the date of the original purchase from an authorized UNI-T distributor. Probes, other accessories, and fuses are not included in this warranty.

If the product is proved to be defective within the warrenty period, UNI-T reserves the rights to either repair the defective product without charging of parts and labor, or exchange the defected product to a working equivalent product. Replacement parts and products may be brand new, or perform at the same specifications as brand new products. All replacement parts, modules, and products become the property of UNI-T.

The “customer” refers to theindividual or entity that is declared in the guarantee. In order to obtain the

warranty service, "customer" must inform the defects within the applicable warranty period to UNI-T, and to perform appropriate arrangements for the warranty service. The customer shall be responsible for packing and shipping the defective products to the designated maintenance center of UNI-T, pay the shipping cost, and provide a copy of the purchase receipt of the original purchaser. If the product is shipped domestically to the location of the UNI-T service center, UNI-T shall pay the return shipping fee. If the product is sent to any other location, the customer shall be responsible for all shipping, duties, taxes, and any other expenses.

This warranty shall not apply to any defects or damages caused by acciendental, machine parts’ wear

and tear, improper use, and improper or lack of maintenance. UNI-T under the provisions of this warranty has no obligation to provide the following services:

a) Any repair damage caused by the installation, repair, or maintenance of the product by non UNI-T service representatives.

b) Any repair damage caused by improper use or connection to an incompatible device.

c) Any damage or malfunction caused by the use of a power source which does not conform to the requirements of this manual.

UTG1000A Series Function Generator User Manual

d) Any maintenance on altered or integrated products (if such alteration or integration leads to an increase in time or difficulty of product maintenance).

This warranty written by UNI-T for this product, and it is used to substitute any other express or implied warranties. UNI-T and its distributors do not offer any implied warranties for merchatability or applicability purposes.

For violation of this guarantee, UNI-T is responsible for the repair or replacement of defective products is the only remedy available to customers. Regardless of whether UNI-T and its distributors are informed that any indirect, special, incidental, or consequential damage may occur, the UNI-T and its distributors shall not be responsible for any of the damages.

General Safety Overview

This instrument strictly complies with the safety requirements for electronic measuring instrument GB4793 and IEC 61010-1 safety standard during design and manufacturing. Please understand the following safety preventative measures, to avoid personal injury, and to prevent damage to the product or any connected products. To avoid possible dangers, be sure to use this product in accordance with the regulations.

Only trained personnels can perform the maintenance program.

Avoid fire and personal injury.

Use the correct power line: Only use the dedicated UNI-T power supply appointed to the local region

or country for this product.

Correct Plug: Don't plug when the probe or test wire is connected to the voltage source.

Ground the product: This product is grounded through the power supply ground wire. To avoid electric

shock, grounding conductors must be connected to the ground. Please be sure that the product is properly grounded before connecting to the input or output of the product.

Correct connection of oscilloscope probe: Ensure that the probe ground and ground potential are correctly connected. Do not connect ground wire to high voltage.

Check all terminal ratings: To avoid fire and the large current charge, please check all the ratings and the marks on the product. Please also refer to the product manual for details on the ratings before connecting to the product.

Do not open the case cover or front panel during operation

Only use fuses with ratings listed in the technical index

Avoid circuit exposure: Do not touch exposed connectors and components after power is connected.

UTG1000A Series Function Generator User Manual

Do not operate the product if you suspect it is faulty, and please contact UNI-T authorized service personnel for inspection. Any maintenance, adjustment, or replacement of parts must be performed by UNI-T authorized maintenance personnels.

Maintain proper ventilation

Please do not operate the product in humid conditions

Please do not operate in inflammable and explosive environment

Please keep the product surface clean and dry

Safety Terms and Symbols

The following terms may appear in this manual:

Warning: The conditions and behaviors may endanger life.

Note: The conditions and behaviors may cause damage to the product and other properties.

The following terms may appear on the product:

Danger: Performing this operation may cause immediate damage to the operator.

Warning: This operation may cause potential damage to the operator.

Note: This operation may cause damage to the product and devices connected to the product.

The following symbols may appear on the product:

UTG1000A Series Function Generator User Manual

Table of Contents

Preface ............................................................................................................................................. 1

Copyright Information ....................................................................................................................... 2

Warranty .......................................................................................................................................... 3

General Safety Overview ................................................................................................................... 4

Safety Terms and Symbols................................................................................................................. 5

Table of Contents .............................................................................................................................. 6

Chapter 1 Introduction ...................................................................................................................... 8

1.1 Safety Terms and Symbols ..................................................................................................... 8

1.2 General Safety Overview ....................................................................................................... 9

Chapter 2 Introduction .................................................................................................................... 10

2.1 Main Features .............................................................................................................................. 10

2.2 Panels and Buttons ...................................................................................................................... 10

2.2.1 Front Panel ........................................................................................................................ 10

Chapter 3 Quick Start ...................................................................................................................... 15

3.1 General Inspection ...................................................................................................................... 15

3.1.1 Check for Damages Caused by Transport ......................................................................... 15

3.1.2 Check Accessories ............................................................................................................. 15

3.1.3 Machine Inspection ........................................................................................................... 15

3.2 Handle Adjustment ..................................................................................................................... 15

3.3 Basic Waveform Output .............................................................................................................. 16

3.3.1 Frequency Setting ............................................................................................................. 16

3.3.2 Amplitude Setting ............................................................................................................. 16

3.3.3 DC Offset Voltage Setting .............................................................................................. 17

3.3.4 Square Wave Setting ...................................................................................................... 18

3.3.5 Pulse Wave Setting ........................................................................................................ 18

3.3.6 DC Voltage Setting ......................................................................................................... 19

3.3.7 Ramp Wave Setting ........................................................................................................ 20

3.3.8 Noise Wave Setting ........................................................................................................ 20

3.4 Frequency Measurement ............................................................................................................ 21

3.5 Build-in Help System ................................................................................................................... 21

Chapter 4 Advanced Applications 4.1 ROLL mode ............................................................................ 22

4.1 Modulation Waveform Output ................................................................................................... 22

4.1.1 Amplitude Modulation (AM) ............................................................................................. 22

4.1.2 Frequency Modulation (FM) ............................................................................................. 29

4.1.3 Phase Modulation (PM) .................................................................................................... 37

4.1.4 Amplitude Shift Keying (ASK) ............................................................................................ 44

4.1.5 Frequency Shift Keying (FSK) ............................................................................................ 50

4.1.6 Phase Shift Keying (PSK) .................................................................................................... 57

UTG1000A Series Function Generator User Manual

4.1.7 Pulse Width Modulation (PWM) ....................................................................................... 64

4.2 Sweep Waveform Output ........................................................................................................... 71

4.2.1 Sweep Selection ................................................................................................................ 71

4.2.2 Start Frequency and Stop Frequency Setting ................................................................... 72

4.2.3 Sweep Mode ..................................................................................................................... 74

4.2.4 Sweep Time ....................................................................................................................... 74

4.2.5 Trigger Source Selection ................................................................................................... 74

4.2.6 Trigger Output ................................................................................................................... 75

4.2.7 Comprehensive Example .................................................................................................. 75

4.3 Arbitrary Wave Output ............................................................................................................... 79

4.3.1 Enable Arbitrary Wave Function ....................................................................................... 79

4.3.2 Arbitrary Wave Selection .................................................................................................. 80

Chapter 5 Trouble Shooting ............................................................................................................. 81

5.1 No Display On Screen (Black Screen) .......................................................................................... 81

5.2 No Waveform Output ................................................................................................................. 81

Chapter 6 Services and Supports ..................................................................................................... 82

6.1 Warranty Overview ..................................................................................................................... 82

6.2 Contact Us .................................................................................................................................... 82

Appendix A Factory Reset State ....................................................................................................... 83

Appendix B Technical Specifications ................................................................................................ 86

Appendix C Accessories List ............................................................................................................. 92

Appendix D Maintenance and Cleaning ........................................................................................... 93

UTG1000A Series Function Generator User Manual

Chapter 1 Introduction

1.1 Safety Terms and Symbols

The following terms may appear in this manual:

Warning: The conditions and behaviors may endanger life.

Note: The conditions and behaviors may cause damage to the product and other properties.

The following terms may appear on the product:

Danger: Performing this operation may cause immediate damage to the operator.

Warning: This operation may cause potential damage to the operator.

Note: This operation may cause damage to the product and devices connected to the product.

Symbols on the product.

The following symbols may appear on the product:

Alternating Current

Ground Terminal for Testing

Ground Terminal for Chassis

On/Off Button

High Voltage

Caution! Refer to Manual

Protective Ground Terminal

CE logo is a registered trademark of the European Union.

C-tick logo is a registered trademark of Australia.

Environmental Protection Use Period (EPUP)

UTG1000A Series Function Generator User Manual

1.2 General Safety Overview

This instrument strictly complies with the GB4793 safety requirements for electrical equipment and EN61010-1/2 safety standard during design and manufacturing. It complies with the safety standards for insulated voltage standard CAT II 300V and contamination level II. Please read the following safety preventative measures:

To avoid electric shock and fire, please use the dedicated UNI-T power supply appointed to the local region or country for this product.

This product is grounded through the power supply ground wire. To avoid electric shock, grounding conductors must be connected to the ground. Please be sure that the product is properly grounded before connecting to the input or output of the product.

To avoid personal injury and prevent damaging the product, only trained personnel can perform the maintenance program.

To avoid fire or electric shock, please notice rated operating range and product marks. Do not use the product outside the rated range.

Please check the accessories for any mechanical damage before usage.

Only use accessories that came with this product.

Please do not put metal objects into the input and output terminals of this product.

Do not operate the product if you suspect it is faulty, and please contact UNI-T authorized service personnel for inspection.

Please do not operate the product when the instrument box opens.

Please do not operate the product in humid conditions.

Please keep the product surface clean and dry.

If the equipment is used in a manner not specified by the manufacturer, the protection provided by the

equipment may be impaired.

UTG1000A Series Function Generator User Manual

Chapter 2 Introduction

This device is economical, high-performance, multi-functional single channel waveform generators. It uses direct digital synthesis (DDS) technology to produce accurate and stable waveforms, with a resolution as low as 1μHz. It can generate accurate, stable, pure and low distortion output signals, also can provide high-frequency vertical edge square waves. UTG1000’s convenient interface, superior technical indexes and user-friendly graphical display style can help users to complete tasks quickly and improve work efficiency.

2.1 Main Features

 Sine wave output of 20MHz/10MHz/5MHz, full frequency range resolution is 1μHz  Square wave/pulse waveform of 5MHz, and its rising, falling, and duty cycle time are adjustable  Using DDS implementation method, with 125M/s sampling rate and 14bits vertical resolution  6-bit high precision frequency counter that is TTL level compatible  Arbitrary waveform storage of 2048 points, and it can store up to 16 groups of nonvolatile

digital arbitrary waveforms

 Abundant modulation types: AM, FM, PM, ASK, FSK, PSK, PWM  Powerful PC software  4.3-inch high resolution TFT liquid crystal display  Standard configuration interface: USB Device  Supports internal/external modulation and internal/external/manual trigger  Supports sweep output  Easy-to-use multifunctional knob and number keyboard

2.2 Panels and Buttons

2.2.1 Front Panel

UTG1000A series provides users with a simple, intuitive, and easy to operate front panel. The front panel is shown in figure 2-1:

2.On/Off Button

1.Display

Button

4. Auxiliary

Terminal

5.Manual

Buttons

13.Function Menu Softkeys

3.Menu

Softkeys

UTG1000A Series Function Generator User Manual

Operation

Function and System Settings Buttons

Trigger

Button

12.Menu

6. Modulation/ Frequency Meter Input Terminal/ Trigger Output

11. Number Buttons

Knob and Button

9.Directional

8.CH Control/

Output Terminal

7. Synchronous Output

1. Display Screen

4.3-inch TFT LCD displays high-resolution output state, function menu, and other important channel information. It is designed to make human-computer interaction more convenient to improve work efficiency.

2. On/Off Button

To turn on/off the device, press this button and its backlight will turn on (orange), the display will show the function interface after the boot screen.

3. Menu Operation Softkeys

Correspondingly select or check the label contents by identifications of softkey labels (at the bottom of function interface).

Figure 2-1

UTG1000A Series Function Generator User Manual

4. Auxiliary Function and System Settings Button

This button includes 3 function labels: Channel settings, frequency meter, and system. A highlighted label (the midpoint of the label is gray and font is pure white) has a corresponding sub label at the bottom of the display.

5. Manual Trigger Button

Setting trigger, and carrying out manual trigger when flashing.

6. Modulation/Frequency Meter Input Terminal/Trigger Output Terminal

During AM, FM, PM or PWM signal modulation, when modulation source is external, modulation signal is input through external modulation input. When frequency meter function is on, the signal to be measured is input through this interface; when manual trigger for channel signal is enabled, manual trigger signal is output through this interface.

7. Synchronous Output Terminal

This button controls whether open synchronous output or not.

8. CH Control/ Output

Channel output can be turned on/off quickly by pressing Channel button, also can be set by pressing Utility button to pop-up the label, then pressing the Channel Setting softkey.

9. Direction Buttons

When setting parameters, move left and right to change number bit.

10. Multifunctional Knob and Button

Rotate the multifunctional knob to change numbers (rotate clockwise and numbers increase) or use the multifunctional knob as direction button. Press the multifunctional knob to select function, set parameters and confirm selection.

11. Number Keyboard

Number keyboard is used to enter parameter number 0 to 9, decimal point “.” and symbol key “+/-”. Decimal point can change units quickly.

12. Menu Button

3 function labels will pop up by pressing the menu button: Waveform, Modulation, and Sweep. Press the corresponding menu function softkey to get its function.

13. Functional Menu Softkeys

To select function menu quickly

The rear panel is shown in figure 2-2:

UTG1000A Series Function Generator User Manual

Figure 2-2

1. USB Interface

PC software is connected through this USB interface.

2. Heat Dissipation Holes

To ensure this instrument dissipate heat well, please do not block these holes.

3. Insurance Pipe

When AC input current is more than 2A, the fuse will cut off the AC input to protect the device.

4. Main Power Switch

Press down on “I” to power the instrument, and press down on “O” to cut off AC input.

5. AC Power Input Terminal

This device supports AC power from 100V to 240V, 45Hz to 440 Hz, and power fused is 250V, T2 A.

Channel Information

Softkey

Labels

Waveform

Parameter

List

Softkey

Function interface is shown in figure 2-3:

UTG1000A Series Function Generator User Manual

Figure 2-3

Detailed Description:

 Channel information: 1) “ON/OFF” on the left is channel open information. 2) There is a “Limit” logo

indicates output range limit where white is valid and grey is invalid. The matched impedance of

output terminal (1Ω to 1KΩ adjustable, or high resistance, factory default is 50Ω). 3) The right side is

the current valid waveform.

 Softkey labels: Softkey labels are used for identifying menu softkey functions and menu operation

softkey functions.

1) Labels on the right of screen: Highlighted display indicates that the label is selected. If not,

press corresponding softkey to select.

2) Labels at the bottom of screen: Sub label contents belongs to the next category of Type label.

Press corresponding button to select sub labels.

 Waveform Parameter List: Displays parameters of current waveform in a list.  Waveform Display Area: Displays current channel’s waveform.

UTG1000A Series Function Generator User Manual

Chapter 3 Quick Start

3.1 General Inspection

It is recommended to follow the steps below to check the instrument before using this device for the first time.

3.1.1 Check for Damages Caused by Transport

If the packaging carton or the foam plastic cushions are severely damaged, please contact the UNI-T distributor of this product immediately.

If the instrument is damaged by transport, please keep the package and contact the transport department and the UNI-T distributor, the distributor will arrange for repairment or replacement.

3.1.2 Check Accessories

UTG1000 accessories are: Power cord, USB data cable, BNC cable (1 meter), and user CD.

If any of the accessories are missing or damaged, please contact UNI-T or local distributors of this product.

3.1.3 Machine Inspection

If the instrument appears to be damaged, not working properly, or has failed the functionality test, please contact UNI-T or local distributors of this product.

3.2 Handle Adjustment

UTG1000 series handle can be adjusted freely. If the handle position needs to be changed, please hold the handle on both sides and pull out, then rotate the handle to the desired position, as shown in figure

3-1:

Figure 3-1

UTG1000A Series Function Generator User Manual

3.3 Basic Waveform Output

3.3.1 Frequency Setting

Default waveform: A sine wave of 1kHz frequency and 100mV amplitude (with 50Ω termination). Steps for changing the frequency to 2.5MHz are shown as following:

a) Press Menu→Waveform→Parameter→Frequency in turn to frequency setting mode. Set

parameters by pressing Frequency softkey to change frequency and period.

b) Use number keyboard to input the required number of 2.5.

c) Select corresponding unit MHz.

3.3.2 Amplitude Setting

Defaultwaveform: A sine wave of 100mV peak-peak value with 50Ω termination.

Steps for changing the amplitude to 300mV are shown as following:

1. Press Menu→Waveform→Parameter→Amplitude in turn. Press Amplitude softkey again can

switch between Vpp, Vrms, and dBm.

2. Use number keys to input 300.

UTG1000A Series Function Generator User Manual

3. Select required unit: Press unit softkeymVpp.

Note: This parameter can be set by multifunctional knob and direction buttons.

3.3.3 DC Offset Voltage Setting

The default waveform is a sine wave with 0V DC offset voltage (with 50Ω termination).Steps for changing DC offset voltage to -150mV are shown as following:

1. Press Menu→Waveform→Parameter→Offset to enter parameter setting.

2. Use number keys to input the required number of -150.

3. Select corresponding unit mV.

Note: This parameter can be set by multifunctional knob and direction buttons.

UTG1000A Series Function Generator User Manual

3.3.4 Square Wave Setting

Press Menu→Waveform→Type→Squarewave→Parameter in turn (press Type softkey to select only when Type label is not highlighted). If parameter needs to be set, press corresponding softkey to enter required numerical value and select the unit.

Note: This parameter can be set by multifunctional knob and direction buttons.

3.3.5 Pulse Wave Setting

Default duty cycle of pulse wave is 50% and rising/falling edge time is 1us. Steps for setting square wave with 2ms period, 1.5Vpp amplitude, 0V DC offset and 25% duty cycle (limited by the minimum pulse width specification 80ns), 200us rising time and 200us falling time are seen as following:

Press Menu→Waveform→Type→PulseWave→Parameter in turn, then press Frequency softkey to switch to Period. Enter required number value and select the unit. When entering duty cycle value, there is a quick label at the bottom of display, and select 25%.

If need to set falling edge time, press Parameter softkey or rotate multifunctional knob to the right to enter sub label, then press Falling Edge softkey to enter required number and select unit.

UTG1000A Series Function Generator User Manual

Note: This parameter can be set by multifunctional knob and direction buttons.

3.3.6 DC Voltage Setting

Actually, DC voltage output is the setting of DC offset. Steps for changing DC offset voltage to 3V are seen as following:

1. Press Menu→Waveform→Type→DC in turn to enter parameter setting mode.

2. Use number keyboard to input the required number of 3.

3. Select required unit V

Note: This parameter can be set by multifunctional knob and direction buttons.

UTG1000A Series Function Generator User Manual

3.3.7 Ramp Wave Setting

Default symmetry degree of ramp wave is 100%. Steps for setting triangular wave with 10kHz frequency, 2V amplitude, 0V DC offset and 50% duty cycle are seen as following:

Press Menu→Waveform→Type→RampWave→Parameter in turn to enter parameter setting mode. Select parameter to enter edit mode, then input required numbers and select unit. Note: When enter symmetry degree value, there is a 50% label at the bottom of display, press corresponding softkey or use number keyboard.

Note: This parameter can be set by multifunctional knob and direction buttons.

3.3.8 Noise Wave Setting

Default Quasi Gauss noise amplitude is 100mVpp and DC offset is 0mV. Steps for setting Quasi Gauss noise with 300mVpp amplitude and 1V DC offset are shown as following:

Press Menu→Waveform→Type→Noise→Parameter in turn to enter parameter editing mode. After setting, enter required number and unit.

UTG1000A Series Function Generator User Manual

Note: This parameter can be set by multifunctional knob and direction buttons.

3.4 Frequency Measurement

This device is suitable for measuring frequency and duty cycle of TTL compatible signals, with frequency range of 1Hz to 100MHz. The frequency meter takes signal through the input interface (Input/CNT terminal). Press Utility then Counter to collect Frequency, Period, and Duty Cycle values from input signal. Note: When there is no signal input, frequency meter parameter list always shows last measurement value. Frequency meter will refresh only when new TTL compatible signal is present at the Input/CNT terminal.

3.5 Build-in Help System

The build-in help system provides relevant information for any button or menu softkey. You also can use help topic list to get help. Operations for buttons help information are shown as following:

Long press any softkey or button to display relevant information. If the content is more than 1 screen size, use softkey or multifunctional knob to display the next screen. Press “Return” to exit.

Note!

The built-in help system provides simplified Chinese and English languages. All information, context help and help topic are displayed in selected language. Language setting: Utility→ System→Language.

UTG1000A Series Function Generator User Manual

Chapter 4 Advanced Applications 4.1 ROLL mode

4.1 Modulation Waveform Output

4.1.1 Amplitude Modulation (AM)

Press Menu→Modulation→Type→ Amplitude Modulation in turn to start the AM function. Then the modulated waveform will output with modulation waveform and carrier wave set.

Carrier Waveform Selection

AM carrier waveform can be: sine wave, square wave, ramp wave or arbitrary wave (except DC), and the default is sine wave. After selecting AM modulation, press Carrier Wave Parameter softkey to enter carrier waveform selection interface.

Carrier Wave

Frequency

UTG1010A

UTG1005A

Minimum Value

Maximum Value

Minimum Value

Maximum Value

Sine Wave

1μHz

10MHz

1μHz

5MHz

Square wave

1μHz

5MHz

1μHz

5MHz

Ramp Wave

1μHz

400kHz

1μHz

400KHz

Arbitrary Wave

1μHz

2MHz

1μHz

1MHz

UTG1000A Series Function Generator User Manual

Carrier Wave Frequency Setting

Settable carrier wave frequency range is different for different carrier waveforms. Default frequency of all carrier wave is 1kHz. The frequency setting range of each carrier wave can be seen in the following table:

If need to set carrier frequency, please press Parameter→ Frequency softkey, then enter required numerical value, and select unit after selecting carrier waveform.

Modulation Source Selection

This device can select internal modulation source or external modulation source. After enabling AM function, the default modulation source is internal. If need to change press Parameter→ModulationSource→External in turn.

1) Internal Source

When modulation source is internal, modulation wave can be: sine wave, square wave, rising ramp wave, falling ramp wave, arbitrary wave and noise. After enabling AM function, the default of modulation wave is sine wave. If need to change it, press Carrier Wave →Parameter→Type in turn.

UTG1000A Series Function Generator User Manual

 Square wave: duty cycle is 50%  Rising Ramp Wave: symmetry degree is 100%  Falling Ramp Wave: symmetry degree is 0%

 Arbitrary Wave: when arbitrary wave is modulated waveform, DDS function generator

limits arbitrary wave length as 1kpts in the way of random selection

 Noise: White Gauss noise

2) External Source

When modulation source is external, parameter list will hide the modulation wave option and modulation frequency option, and carrier waveform will be modulated by an external waveform. AM modulation depth is controlled by ±5V signal level of external modulation input terminal. For example, if modulation depth value is set to 100%, AM output amplitude is the maximum when external modulation signal is +5V, AM output amplitude is the minimum when external modulation signal is -5V.

Modulation Shape Frequency Setting

When modulation source is internal, frequency of modulation shape can be modulated. After enabling AM function, range of modulation wave frequency is 2mHz~50kHz (default is 100Hz). Press Parameter→Modulation Frequency to change. When modulation source is external, parameter list will hide the modulation shape option and modulation frequency option, and carrier waveform will be modulated by an external waveform. The range of modulation signal input from external is 0Hz~ 20Hz.

Modulation Depth Setting

Modulation depth indicates the extent of amplitude variation and is expressed as percentage. Suitable setting range of AM modulation depth is 0% to 120%, and the default is 100%. When modulation depth is set to 0%, the constant amplitude (a half of the carrier wave amplitude that has been set) is output. Output amplitude changes as modulation waveform changes when modulation depth is set to 100%. The instrument output a peak-peak voltage less than ±5V (is connected with 50Ω terminal) when modulation depth is more than 100%. If need to change, press Parameter→Modulation Depth in amplitude function interface. When modulation source is external, output amplitude of the instrument is controlled by ±5V signal level of external modulation input terminal (Input/CNT probe) in rear panel. For example, if modulation depth value in parameter list has been set to 100%, AM output amplitude is the maximum when external modulation signal is +5V, AM output amplitude is the minimum when external modulation signal is -5V.

Comprehensive Example

Firstly, make the instrument work in amplitude modulation (AM) mode, then set a sine wave with 200Hz from the internal of the instrument as a modulation signal and a square wave with frequency of 10kHz, amplitude of 200mVpp and duty cycle of 45% as a carrier wave signal. Finally, set modulation depth to 80%. Specific steps are seen as following:

1) Enable Amplitude Modulation (AM) Function

UTG1000A Series Function Generator User Manual

Press Menu→Modulation→Type→Amplitude Modulation in turn.

2) Set Modulation Signal Parameter

After enabling the AM function, press Parameter softkey and the interface will appear as following:

Press corresponding softkey, then enter required numerical value, and select the unit.

UTG1000A Series Function Generator User Manual

3) Set Carrier Wave Signal Parameter

Press Carrier Wave Parameter→Type→ Square Wave in turn to select square wave as carrier wave signal.

Press Parameter softkey again, and the interface will pop up as following:

UTG1000A Series Function Generator User Manual

Press corresponding softkey, then enter required numerical value, and select the unit.

4) Set Modulation Depth

After setting carrier wave parameter, press Return softkey to back to the following interface for setting modulation depth.

UTG1000A Series Function Generator User Manual

Press Parameter →Modulation Degree softkey again, then enter number 80 and press % softkey with number keyboard for setting modulation depth.

5) Enable Channel Output

Press Channel button start channel output quickly. Or enable output by pressing Channel Setup softkey after pressing Utility button and popping up labels. After channel output is opened, backlight of Channel button is on, and on the right side of channel information label, the font “OFF” changes to “ON”, meaning open channel output.

+ 67 hidden pages

UNI-T UTG1000A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual