Global Specialties SFG-210 User manual

SFG-2;

10 MHz Arbitrary/ Function
Waveform GeneratorV

User

M a n u a l

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Safety Summary

The following safety precautions apply to both operating and maintenance personnel
and must be observed during all phases of operation, service, and repair of this
instrument. Before applying power, follow the installation instructions and become
familiar with the operating instructions for this instrument.

If this device is damaged or something is missing, contact the place of purchase
immediately.

This manual contains information and warnings that must be followed to ensure safe
operation as well as maintain the meter in a safe condition.

GROUND THE INSTRUMENT

To minimize shock hazard, the instrument chassis and cabinet must be connected
to an electrical ground. This instrument is grounded through the ground conductor of
the supplied, three-conductor ac power cable. The power cable must be plugged into
an approved three-conductor electrical outlet. Do not alter the ground connection.
Without the protective ground connection, all accessible conductive parts (including
control knobs) can render an electric shock. The power jack and mating plug of the
power cable must meet IEC safety standards.

DO NOT OPERATE IN AN EXPLOSIVE ATMOSPHERE

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safety hazard.

KEEP AWAY FROM LIVE CIRCUITS

Instrument covers must not be removed by operating personnel. Component

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personnel. Disconnect the power cord before removing the instrument covers and
replacing components. Under certain conditions, even with the power cable removed,
dangerous voltages may exist. To avoid injuries, always disconnect power and
discharge circuits before touching them.

DO NOT SERVICE OR ADJUST ALONE

Do not attempt any internal service or adjustment unless another person, capable of

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DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT

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instrument. Return the instrument to B&K Precision for service and repair to ensure
that safety features are maintained.

WARNINGS AND CAUTIONS

WARNING and CAUTION statements, such as the following examples, denote a

1

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hazard and appear throughout this manual. Follow all instructions contained in these
statements.

WARNING statement calls attention to an operating procedure, practice, or

A
condition, which, if not followed correctly, could result in injury or death to personnel.

CAUTION statement calls attention to an operating procedure, practice, or condition,

A
which, if not followed correctly, could result in damage to or destruction of part or all of
the product.

WARNING:

Do not alter the ground connection. Without the protective ground connection, all
accessible conductive parts (including control knobs) can render an electric shock.
The power jack and mating plug of the power cable meet IEC safety standards.

WARNING:

To avoid electrical shock hazard, disconnect power cord before removing covers.

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CAUTION:

Before connecting the line cord to the AC mains, check the rear panel AC line voltage
indicator. Applying a line voltage other than the indicated voltage can destroy the AC

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voltage and current ratings.

CAUTION:

This product uses components which can be damaged by electro-static discharge
(ESD). To avoid damage, be sure to follow proper procedures for handling, storing
and transporting parts and subassemblies which contain ESD-sensitive components.

Compliance Statements

Disposal of Old Electrical & Electronic Equipment
(Applicable in the European Union and other European
countries with separate collection systems). This product
is subject to Directive 2002/96/EC of the European
Parliament and the Council of the European Union on
waste electrical and electronic equipment (WEEE) ,
and in jurisdictions adopting that Directive, is marked
as being put on the market after August 13, 2005, and
should not be disposed of as unsorted municipal waste.
Please utilize your local WEEE collection facilities in
the disposition of this product and otherwise observe all
applicable requirements.

2

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CE Declaration of Conformity

The power supply meets the requirements of 2006/95/EC Low Voltage Directive and
2004/108/EC Electromagnetic Compatibility Directive with the following standards.

Low Voltage Directive

z EN61010-1: 2001
z EN61010-031: 2002+A1: 2008

EMC Directive

z EN 61326-1:2006
z EN 61000-3-2: 2006+A2: 2009
z EN 61000-3-3: 2008

Safety Symbols

Refer to the user manual for warning information to avoid hazard or
personal injury and prevent damage to instrument.

CAUTION
WARNING

Chassis (earth ground) symbol.

On (Power). This is the In position of the power switch when
instrument is ON.

Off (Power). This is the Out position of the power switch when
instrument is OFF.

Off (Supply). This is the AC mains connect/disconnect switch on the
back of the instrument.

CAUTION indicates a hazardous situation which, if not avoided, will
result in minor or moderate injury

WARNING indicates a hazardous situation which, if not avoided,
could result in death or serious injury

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Introduction of SFG-20X Series

The manual covers the following two types of SFG-20X Series Function/Arbitrary
Waveform Generators: SFG-210 and SFG-205.

SFG-20X Series Function/Arbitrary Waveform Generators adopt the direct
digital synthesis (DDS) technology, which can provide stable, high-precision,
pure and low distortion signals. Its combination of excellent system features,
easiness in usage and versatile functions makes this generator a perfect solution
for your job now and in the future.

SFG-20X Series Function/Arbitrary Waveform Generator has a clear and simple
front-panel. The user-friendly panel layout and instructions, versatile terminals,
direct graph interface, built-in instructions and help system have greatly
simplified the operation process, with the help of which, users do not have to
spend a great deal of time learning and familiarizing the operation of the
generator before they can use it proficiently. The built-in AM, DSB-AM,FM, PM,
ASK, FSK and PWM modulation functions generate modulated waveforms at
ease, without the help of a separate modulating source. USB I/O is a standard
accessory, while GPIB is optional. Remote instructions meet the SCPI
specification requirements.

From the characteristics and specifications given below, you will understand how
SFG-20X can satisfy your requirements.

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DDS technology provides precise, stable and low distortional output 

signal.

3.5’TFT color LCD display. 
125MSa/s sampling rate, 14-bit resolution. 
Frequency characteristics: 

Sine: 1μHz to 30MHz
Square: 1μHz to 10 MHz
Ramp: 1μHz to 300kHz
Pulse: 500μHz to 5MHz
White Noise: 10MHz bandwidth (-3dB)

Arbitrary: 1μHz to 5MHz
5 standard waveforms: Sine, Square, Ramp, Pulse, Noise 
Self-defined arbitrary waveform 
Multiple modulation function: AM, FM, PM, ASK, FSK, PWM, DSB-AM, 

Sweep and Burst.

Multiple interfaces: USB host & USB device(USBTMC) 
Support USB storage device. Software updating could also be 

performed using USB devices.

Up to 16k sample points of internal waveform depth, which can rebuild 

or simulate any complex waveform.

Built-in help system.

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Catalogue 

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

Introduction of SFG-20X Series ...................................................................... VI

1. Getting Started ........................................................................................... 1

1.1. General Inspection ........................................................................... 2

1.2. Handle Adjustment ........................................................................... 2

1.3. The Front/Rear Panel ....................................................................... 3

1.4. To Set a Waveform ........................................................................... 7

1.5. To Set Modulate/Sweep/Burst ........................................................ 12

1.6. To Set Output ................................................................................. 14

1.7. To Use Digital Input ........................................................................ 15

1.8. To Use Store/Utility/Help Function ................................................. 16

2. Operating Your Generator ....................................................................... 17

2.1. To Set Sine Signals ........................................................................ 18

2.2. To Set Square Signals .................................................................... 23

2.3. To Set Ramp Signals ...................................................................... 26

2.4. To Set Pulse Signals ...................................................................... 29

2.5. To Set Noise Signals ...................................................................... 33

2.6. To Set Arbitrary Signals .................................................................. 35

2.7. To Generate the Modulated Waveform .......................................... 42

2.8. To Generate Sweep ....................................................................... 52

2.9. To Generate Burst .......................................................................... 54

2.10. To Store and Recall ..................................................................... 58

2.11. To Set the Utility Function ........................................................... 64

2.12. Test/Cal ....................................................................................... 75

2.13. Edition Information ...................................................................... 80

2.14. Updating Firmware ...................................................................... 82

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2.15. How to Use the Built-in Help System .......................................... 83

3. Application and Examples ........................................................................ 84

3.1. Example 1:Generate a Sine Wave ................................................. 85

3.2. Example 2:Generate a Square Wave ............................................. 87

3.3. Example 3:Generate a Ramp Wave ............................................... 89

3.4. Example 4:Generate a Pulse Wave ............................................... 91

3.5. Example 5:Generate a Noise Wave ............................................... 93

3.6. Example 6:Generate an Arbitrary Wave ......................................... 94

3.7. Example 7:Generate a Sweep Linear Wave .................................. 96

3.8. Example 8:Generate a Burst Wave ................................................ 98

3.9. Example 9:Generate an AM Wave ............................................... 100

3.10. Example 10:Generate a FM Wave ............................................ 102

3.11. Example 11:Generate a PM Wave ............................................ 104

3.12. Example 12:Generate a FSK Wave .......................................... 106

3.13. Example 13:Generate an ASK Wave ........................................ 108

3.14. Example 14: Generate a PWM Wave ....................................... 110

3.15. Example 15: Generate a DSB-AM Wave .................................. 112

4. Troubleshooting ..................................................................................... 114

General Inspecting .................................................................................... 114

Troubleshooting ........................................................................................ 115

5. Service and Support .............................................................................. 116

Maintain summary .................................................................................... 116

Contact GLOBAL SPECIALTIES .............................................................. 117

6. Appendix ................................................................................................ 117

Appendix A: Accessories .......................................................................... 117

Appendix B: Daily Maintain and Cleaning ................................................. 118

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1. Getting Started

This chapter covers the following topics:

 General Inspection

 Handle Adjustment

 The Front/Rear Panel

 To Set a Waveform

 To Set Modulate/Sweep/Burst

 To Set Output

 To Use Digital Input

 To Use Store/Utility/Help Function

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1.1. General Inspection

When you get a new SFG-20X Series Function/Arbitrary Waveform Generator,
you are suggested to take the following steps to inspect the instrument.

1. Inspect the shipping container for damage.

If there are damages in the packing or foam, keep them until the whole
machine and the accessories pass the electric and mechanical testing.

2. Check the accessories.

Accessories supplied with the instrument are listed in chapter 6 ‘Appendix
A: Accessories’.
If the contents are incomplete or damaged, please notify your sales
representative.

3. Inspect the instrument.

In case any mechanical damage or defect, or if the instrument does not
operate properly or pass performance tests, notify your sales
representative. If the shipping container is damaged, or the cushioning
materials show signs of stress, notify the carrier as well as your sales office.
Keep the shipping materials for the carrier’s inspection. Offices will arrange
for repair or replacement at their option without waiting for claim settlement.

1.2. Handle Adjustment

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To adjust the handle position of SFG-20X Function/Arbitrary Waveform
Generator, please grip the handle by the sides and pull it outward. Then, make
the handle rotate to the desired position.

Figure 1- 1 Viewing Position and Carrying Position

1.3. The Front/Rear Panel

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When you get a new SFG-20X Series Function/Arbitrary Waveform Generator,
first you need to understand how to operate the front/rear panel correctly. This
chapter will make a brief introduction and description for the operation and
functions of the front/rear panel.

The SFG-20X Series Function/Arbitrary Waveform Generator has a clear and
simple front panel. See Figure 1- 2 and Figure 1- 3. The front panel has a knob
and functional keys. The 5 blue grey buttons on the right side of the screen are
menu buttons (named F1 to F5 from up to down) with the help of which, you can
enter different functions menu or have direct specific applications. The signal
input and output interfaces are set at the front and rear panels which can help
generating multiple arbitrary waveforms. The various interfaces can meet the
need of the multiple interface communications.

Figure 1- 2 SFG-20X Series

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Figure 1- 3 Front Panel of SFG-20X Series

1. Display

2. Return Key

3. Waveform Selection Keys

4. Number Keypad

5. Knob

6. Cursor Keys

7. Manual Trigger Key (Sweep and Burst only)

8. Output Enable Key

9. Output BNC Connector

10. Sync BNC Connector

11. Help Menu Key

12. Modulation/Sweep/Burst Keys

13. Utility Menu Key

14. State Storage Menu Key

15. Menu Operation Softkeys

16. On/Off Switch

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17. USB Connector

Figure 1- 4 Rear Panel of SFG-20X Series

1. USB Interface

2. AC Input Receptacle

Waveform

Display area

Parameter area

Figure 1- 5 Display Interface (Sine Wave is the default display signal)

Menu Options

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Character definitions in this User Manual:
The signs for buttons in this manual are the same as the panel buttons. Please
note that, the signs for the functional buttons on the operation panel are
represented by squared words, such as Sine , which represents the
transparent functional key with Sine on it on the front panel, while the menu
buttons are represented by brighten words such as Freq, which means the
frequency option in the Sine menu.

1.4. To Set a Waveform

On the operation panel, there is a set of buttons with waveform icon. See Figure
1- 6. The exercise below will help you familiarize with the waveform selection
settings.

Figure 1- 6 Waveform Selection Buttons

1. Press Sine button and the waveform window will display sine waveform.
SFG-20X Series Generator can generate sine signal with a frequency from
1μHz to 30MHz. By setting frequency/period, amplitude/high level,
offset/low level, sine signal with different parameters can be generated.

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Figure 1- 7 Sine Signal Display Interface

As is shown in Figure 1- 7, the default signal parameters are: 1 kHz frequency,

4.0 Vpp amplitude and 0 Vdc offset.

2. Press Square button, and the waveform window displays square waveform.
SFG-20X Series Generator can generate square signal with a frequency
from 1μHz to 10MHz and variable duty cycle.

Figure 1- 8 Square Signal Display Interface

As is shown in Figure 1- 8, the default signal parameters are: 1kHz frequency,

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4.0Vpp amplitude, 0Vdc offset and 50% duty cycle.

3. Press Ramp button, and the waveform window displays ramp waveform.
SFG-20X Series Generator can generate ramp signal with a frequency of
from 1μHz to 300kHz and variable symmetry.

Figure 1- 9 Ramp Signal Display Interface

As is shown in Figure 1- 9, the default signal parameters are: 1kHz frequency,

4.0Vpp amplitude, 0Vdc offset and 50% symmetry.

4. Press Pulse button, and the waveform window displays pulse waveform.
SFG-20X Series Generator can generate pulse signal with a frequency
from 500μHz to 5 MHz and variable pulse width and delay.

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Figure 1- 10 Pulse Signal Display Interface

As is shown in Figure 1- 10, the default signal parameters are: 1kHz frequency,

4.0Vpp amplitude, 0Vdc offset, 200μs pulse width.

5. Press Noise button, and the waveform window displays noise waveform.
SFG-20X Series Generator can generate noise signal with a band width up
to 10MHz.

Figure 1- 11 Noise Signal Display Interface

As is shown in Figure 1- 11, the default signal parameters are: 128mV Stdev and
0mV Mean.

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6. Press Arb button, and the waveform window displays arbitrary waveform.
SFG-20X Series Generator can generate repeatable arbitrary waveform
signals with at most 16 kpts and 5 MHz frequency.

Figure 1- 12 Arbitrary Waveform Signal Display Interface

As is shown in Figure 1- 12, the default signal parameters are: 1 kHz frequency,

4.0 Vpp amplitude and 0 mVDC offset.

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1.5. To Set Modulate/Sweep/Burst

As shown in Figure 1- 13, there are three buttons on the front panel, which are
used for modulation, sweep and burst settings. The instructions below will help
you familiarize with the setting of these functions.

Figure 1- 13 Modulate/Sweep/Burst Button

1. Press Mod button, the modulated waveforms will be generated. The
modulated waveform can be changed by modifying the parameters such as
type, internal/external modulation, depth, frequency, waveform, etc.
SFG-20X Series can modulate waveform using AM, FM, PM, ASK, FSK,
PWM and DSB-AM. Sine, square, ramp and arbitrary waveforms can be
modulated (pulse, noise and DC cannot be modulated).

Figure 1- 14 Modulated Waveform Display Interface

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2. Press Sweep button, sine, square, ramp or arbitrary waveform can be swept
(pulse, noise and DC can not be swept).

In the sweep mode, SFG-20X Series generate signal with variable
frequencies.

Figure 1- 15 Sweep Waveform Display Interface

3. Press Burst button, burst for sine, square, ramp, pulse or arbitrary waveform
can be generated.

Figure 1- 16 Burst Waveform Display Interface

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Term Explanation
Burst: Output waveforms with set cycle times.

Burst can last for certain times of waveform cycle (N-Cycle Burst) or be
controlled by external gated signals (Gated Burst). Burst applies to all kinds
of waveforms, but noise can only be used in gated burst. Generally it is called
burst function within every signal generator.

1.6. To Set Output

As is shown in Figure 1- 17, there are two buttons on the right side of the
operation panel, which are used to output/trigger control. The instruction below
will help you familiarize with these functions.

Figure 1- 17 Output Buttons

Press Output button, activate or deactivate the output signal.

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1.7. To Use Digital Input

As is shown in Figure 1- 18, there are three sets of buttons on the operation
panel, which are direction button, the knob and the keypad. The instruction
below will help you familiarize with the digital input function.

Figure 1- 18 Front Panel Digital Input

1. The up and down keys are used to shift parameters and the left and right keys

are used to shift digits.

2. Keypad is used to directly set the parameters value.

3. Knob is used to change a signal digit value whose range is 0~9.

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1.8. To Use Store/Utility/Help Function

As is shown in Figure 1- 19, there are three buttons on the operation panel,
which are used to call the store/recall, utility and help function. The instruction
below will help you familiarize with these functions.

Figure 1- 19 Store/Recall Utility and Help Button

1. The Store/Recall button is used to store waveform data and configure

information.

2. The Utility button is used to set the auxiliary system function, change the

output configure parameters, interface setting, system setting information
or perform the instrument self-test and read the calibration information, etc.

3. The Help button is used to read the help information.

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2. Operating Your Generator

Up to now you have got a brief understanding about SFG-20X series with the
front/rear panel, every function control area and keys. You should also know
how to set your Function/Arbitrary Waveform Generator for your usage. If you
are not familiar with these operations, you are suggested to read chapter one
‘Getting Started’ again.

This chapter covers the following topics:

 Setting Sine Signal
 Setting Square Signal
 Setting Ramp Signal
 Setting Pulse Signal
 Setting Noise Signal
 Setting Arb Signal
 Output Modulated Signal
 Output Sweep Signal
 Output Burst Signal
 Store/Recall
 Utility Setting
 Help System

You are suggested to read this chapter carefully so as to understand
SFG-20X Series Generator’s versatile waveform setting functions and
more operation methods.

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2.1. To Set Sine Signals

Press Sine button to call the sine operation. The sine waveform parameters are
set by using the sine operation menu.

The parameters of sine waveforms are: frequency/period, amplitude/high level,
offset/low level and phase. Different sine signals are generated by setting these
parameters. As is shown in Figure 2- 1, in the soft key menu, select Freq. Cursor
is located in the frequency parameter area in the parameter display window, and
users can set the frequency value here.

Figure 2- 1 Sine Parameter Display Interface

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Figure 2- 2 Table2- 1 Menu Explanations of Sine Waveform

Function

menu

Freq/

Period

Ampl/

HLevel

Offset/
LLevel

Phase Set the phase of the signal;

Set the signal frequency or period;
The current parameter will be switched at a
second press.
Set the signal amplitude or high level;
The current parameter will be switched at a
second press.
Set the signal offset or low level;
The current parameter will be switched at a
second press.

To Set the Output Frequency/Period

Explanations

1. Press Sine →Freq, to set the frequency parameter.

The frequency shown on the screen when the instrument is powered is the
default value or the set value beforehand. When setting the function, if the
current value is valid for the new waveform, it will be used sequentially. If
you want to set the period for the waveform, press Freq/Period button again,
to switch to the period parameter (the current operation is displayed in
inverse color).

2. Input the desired frequency.

Use the keypad to input the parameter value directly, and press the
corresponding button to select the parameter unit. Or you can use the
direction button to select the digit you want to edit, and then use the knob

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to change its value.



Figure 2- 3 Setting the Frequency

Instruction:
When using the keypad to enter the digit, you can use the left direction button to
move the cursor backward and delete or change the value of the previous digit.

To Set the Output Amplitude

1. Press Sine →Ampl, to set the amplitude.

The amplitude shown on the screen when the instrument is powered is the
default value or the set value beforehand. When changing the function, if
the current value is valid for the new waveform, it will be used sequentially.
If you want to set the waveform by high level or low level, press the
Ampl/HLevel or Offset/LLevel button again, to switch into the high level or
low level parameter (the current operation is displayed in inverse color).

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2. Input the desired Amplitude

Use the keypad or the knob to input the desired value, choose the unit, and
press the corresponding button.

Figure 2- 4 Setting the Amplitude

To Set the Output Offset

1. Press Sine →Offset, to set the offset.

The offset shown on the screen when the instrument is powered is the
default value or the set value beforehand. When changing the function, if
the current value is valid for the new waveform, it will be used sequentially.

2. Input the desired Offset

Use the keypad or the knob to input the desired value, choose the unit, and
press the corresponding button.

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Figure 2- 5 Setting the Offset

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2.2. To Set Square Signals

Press Square button to call the Square operation. The square waveform
parameters are set by using the Square operation menu.

The parameters of Square waveforms are: frequency/period, amplitude/high
level, offset/low level, phase and duty. As is shown in Figure 2- 6, select Duty.
Cursor is located in the duty parameter area in the parameter display window,
and users can set the duty value here.

Figure 2- 6 Square Parameter Display Interface

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Figure 2- 7 Table2- 2 Menu Explanations of Square Waveform

Function

Menu

Freq/

Period

Ampl/

HLevel

Offset/
LLevel

Phase Set the phase of the signal;

Duty Set the duty cycle for square waveform.

Term Explanation:

Settings Explanation

Set the signal frequency or period;

The current paramete r will be switched at a
second press.

Set the signal amplitude or high level;

The current paramete r will be switched at a
second press.

Set the signal offset or low level;

The current paramete r will be switched at a
second press.

Duty Cycle: The percentage that the high level takes up the whole period.
Please Note : for the frequency Duty Cycle Value
below 10MHz: 20% to 80%

To Set the Duty Cycle

1 Press Square →Duty, to set the duty cycle.

The duty cycle shown on the screen when the instrument is powered is the
default value or the set value beforehand. When changing the function, if
the current value is valid for the new waveform, it will be used sequentially.

2 Input the desired Duty Cycle

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Use the keypad or the knob to input the desired value, choose the unit, and
press the corresponding button. The generator will change the waveform
immediately.

Figure 2- 8 Setting the Duty Cycle

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2.3. To Set Ramp Signals

Press Ramp button to call the ramp operation. The ramp waveform parameters
are set by using the ramp operation menu.

The parameters for ramp waveforms are: frequency/ period, amplitude/ high
level offset/ low level, phase and symmetry. As is shown in Figure 2- 9, in the
soft key menu, select Symmetry. Cursor is located in the symmetry parameter
area in the parameter display window, and users can set the symmetry value
here.

Figure 2- 9 Ramp Parameter Display Interface

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Figure 2- 10 Table2- 3 Menu Explanations of Ramp Waveform

Function

Menu

Freq/

Period

Ampl/

HLevel

Offset/
LLevel

Phase Set the phase of the signal;

Symmetry Set the symmetry for ramp w aveform.

Term Explanation:

Settings Explanation

Set the signal frequency or period;
The current parameter will be switched at a
second press.
Set the signal amplitude or high level;
The current parameter will be switched at a
second press.
Set the signal offset or low level;
The current parameter will be switched at a
second press.

Symmetry: The percentage that the rising period takes up the whole Period.
Input Range: 0~100%.

To Set the Symmetry

1. Press Ramp →Symmetry, to set the symmetry.

The symmetry shown on the screen when the instrument is powered is the
default value or the set value beforehand. When changing the function, if
the current value is valid for the new waveform, it will be used sequentially.

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2. Input the desired Symmetry

Use the keypad or the knob to input the desired value, choose the unit, and
press the corresponding button. The generator will change the waveform
immediately.

Figure 2- 11 Setting the Symmetry

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2.4. To Set Pulse Signals

Press Pulse button to call the pulse operation. The pulse waveform parameters
are set by using the pulse operation menu.

The parameters for pulse waveforms are: frequency/period, amplitude/high
level, offset/low level, pulse width/Duty and Rise/Fall. As is shown in Figure 2­12, in the soft key menu, select PulWidth. Cursor is located in the pulse width
parameter area in the parameter display window, and users can set the pulse
width value here.

Figure 2- 12 Pulse Parameter Display Interface

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Figure 2- 13 Table 2- 4 Menu Explanations of Pulse Waveform

Function

Menu

Freq/

Period

Ampl/

HLevel

Offset/
LLevel

PulWidth

/Duty

Rise /

Term Explanation:

Fall

Explanation

Set the signal frequency or period;
The current parameter will be switched at a
second press.
Set the signal amplitude or high level;
The current parameter will be switched at a
second press.
Set the signal offset or low level;
The current parameter will be switched at a
second press.
Set the signal pulse width or duty;
The current parameter will be switched at a
second press.
Setting the rising edge for pulse waveform.

Setting the falling edge for pulse waveform

Pulse Width:

Positive Pulse Width: the time span between thresholds of 50% of the rising edge
amplitude to the next 50% of the falling edge amplitude;
Negative Pulse Width: the time span between thresholds of 50% of the falling
edge amplitude to the next 50% of the rising edge amplitude.

To Set the Pulse Width

1. Press Pulse →PulWidth, to set the pulse width.

The pulse width shown on the screen when the instrument is powered is the
default value or the set value beforehand. When changing the function, if
the current value is valid for the new waveform, it will be used sequentially.

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2. Input the desired Pulse Width

Use the keypad or the knob to input the desired value, choose the unit, and
press the corresponding button. The Generator will change the waveform
immediately.

Figure 2- 14 Setting the Pulse Width

To Set the Rising Edge

1. Press Pulse →Rise, to set the Rise edge.

The rising edge shown on the screen when the instrument is powered is the
default value or the set value beforehand. When changing the function, if
the current value is valid for the new waveform, it will be used sequentially.

2. Input the desired rising edge

Use the keypad or the knob to input the desired value, choose the unit, and
press the corresponding button. The generator will change the waveform
immediately.

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

Figure 2- 15 Setting the Rise edge

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2.5. To Set Noise Signals

Press Noise button to call the Gaussian White noise operation. The noise
waveform parameters are set by using the noise operation menu.

The parameters for noise waveforms are: Stdev and mean. As is shown in
Figure 2- 16, in the soft key menu, select Stdev, Cursor is located in the Stdev
parameter area in the parameter display window, and users can set the Stdev
value here. Noise is non-regulated signal which has no frequency or period.



Figure 2- 16 Noise Parameter Display Interface

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Figure 2- 17 Table 2- 5 Menu Explanations of Noise Waveform



Function

Menu

Stdev Set the signal standard deviation
Mean Set the signal mean

Settings Explanation

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2.6. To Set Arbitrary Signals

Press Arb button to call the Arb operation. The Arb waveform parameters are
set by using the Arb operation menu.
The Arb signal consists of two types: the system built-in waveform and the
user-definable waveform. The parameters for Arb waveforms are:
frequency/period, amplitude/high level, offset/ low level and phase.

Figure 2- 18 Arb Parameter Display Interface

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Figure 2- 19 Table 2- 6 Menu Explanations of Arb Waveform (Page 1/2)

Function

Menu

Freq/

Period

Ampl/

HLevel

Offset/
LLevel

Phase Set the phase of the signal;

Settings Explanation

Set the signal frequency or period;

The current parameter will be switched at
a second press.

Set the signal amplitude or high level;

The current parameter will be switched at
a second press.

Set the signal offset or low level;

The current parameter will be switched at
a second press.

Figure 2- 20 Table 2- 7 Menu Explanations of Arb Waveform (Page 2/2)

Function

Menu

Load Wform

Settings Explanation

Select the built-in arbitrary signal as

output.

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To select the built-in Arbitrary Waveform

There are forty-eight built-in Arbitrary Waveforms and user-definable Arbitrary
Waveforms inside the Generator. To select one of them, follow the instructions
below:
Press Arb →Load Wform, to enter the interface below.

Figure 2- 21 Table 2- 8 Menu Explanations of Built-in Arbitrary Waveform

Function

Menu

Built-In

Stored

Wforms

Cancel



Settings Explanation

Select one of the 46 types built-in arbitrary

Select one of arbitrary waveforms stored in

Cancel the current operation, and return to

1. To Select the Built-in Waveform

waveforms.

the non-volatile memory.

the upper menu (the followings are the same
and will not be explained).

Press Arb →Load Wform->Built-In, and enter the following interface.
As is shown in Figure 2- 22, there are five kinds of arbitrary waveform.

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Figure 2- 22 Table 2- 9 Menu Explanations of Built-In Arbitrary Waveform

Function

Menu

Common Select common waveform.

Math Select math waveform.

Project Select project waveform.

Winfun/

Triangle

Select Validate the built-in waveform.

Settings Explanation

Select windows function

/triangle waveform.

Figure 2- 23 Common Built-In Arbitrary Waveform interface

Table 2- 10 Menu Explanations of Common Built-In Arbitrary Waveform

Function

Menu

StairUp Select the built-in stair up waveform.
StairDn Select the built-in stair down waveform.

StairUD Select the built-in stair up and down waveform.

PPulse Select the built-in positive pulse waveform.

NPulse Select the built-in negative pulse waveform.
Trapezia Select the built-in trapezoid waveform
UpRamp Select the built-in up ramp waveform.
DnRamp Select the built-in down ramp waveform.

Settings Explanation

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Figure 2- 24 Math Built-In Arbitrary Waveform Interface

Table 2- 11 Menu Explanations of Math Built-in Arbitrary Waveform

Function

Menu

ExpFall Select the built-in exponential fall waveform.

ExpRise Select he built-in exponential rise waveform.

LogFall Select the built-in logarithmic fall waveform.

LogRise Select the built-in logarithmic rise waveform.

Sqrt Select the built-in square root waveform.

Root3 Select the built-in Ro o t3 waveform.

X^2 Select the built-in X^2 wavefo rm.

X^3 Select the built-in X^3 wavefo rm.

Sinc Select the built-in sinc waveform; Sincsin(x)/x.

Gaussian Select the built-in gaussian waveform.

Dlorentz Select the built-in D-lorentz waveform.

Haversin Select the built-in haversine waveform.

Lorentz Select the built-in lorentz Waveform.

Gauspuls

Gmonpuls Select the built-in Gaussian monopulse waveform.

Tripuls Select the built-in triangle pulse waveform.

Settings Explanation

Select the built-in gaussian-modulated sinusoidal
pulse waveform.

Figure 2- 25 Project Built-In Arbitrary Waveform interface

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Table 2- 12 Menu Explanations of Project Built-in Arbitrary Waveform

Function

Menu

Cardiac

Quake Select the built-in loma prieta earthquake waveform.

Chirp

TwoTone Select the built-in two tone signal waveform.

SNR

Settings Explanation

Select the built-in electrocardiogram (ECG) signal

waveform.

Select the built-in swept-frequency cosine

waveform.

Select the built-in sin wave with white noise

waveform.

Figure 2- 26 Winfun/Triangle Built-In Arbitrary Waveform interface

Table 2- 13 Menu Explanations of Winfun/Triangle Built-in Arbitrary Waveform

Function

Menu

Hamming Select the built-in hamming window waveform.

Hanning Select the built-in hanning window waveform.

Kaiser Select the built-in kaiser window waveform.

Blackman

Gaussian Select the built-in gaussian window waveform.

Triangle Select the built-in triangle window waveform.

Hairs Select the built-in hairs window waveform.
Bartlett Select the built-in bartlett window w a v e fo rm.

Tan Select the built-in tangent waveform.

Cot Select the built-in cotangent waveform.
Sec Select the built-in secant waveform.
Csc Select the built-in cosecant waveform

Asin Se le c t th e b u ilt-in in v e rs e s in e waveform.

Acos Select the built-in inverse cosine waveform.

Atan Select the built-in tangent waveform.

Settings Explanation

Select the built-in blackman windows

waveform.

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Acot Select the built-in inverse cotangent waveform.

2. To Select the Stored Waveform

Press Arb →Load Wform->Stored Wforms, and enter the following interface.

As is shown in Figure 2- 27, use the direction keys or knob to choose the
corresponding arbitrary waveform and press Select.

Figure 2- 27 Stored Wform Display Interface

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2.7. To Generate the Modulated Waveform

Use the Mod button to generate modulated waveform.SFG-20X Series can
generate AM, FM, ASK, FSK, PM, PWM and DSB-AM modulated waveforms.
Modulating parameters vary with the types of the modulation. In AM, users can
set the depth, modulating frequency, modulating waveform and carrier
waveform; In FM, users can set the modulating frequency, frequency deviation,
modulating waveform and carrier waveform; In ASK, users can set the Key Freq
and carrier waveform; In FSK, users can set the key frequency, Hop Freq and
carrier waveform; In PM, users can set the phase deviation, modulating
frequency, modulating waveform and carrier waveform.

We will cover how to set these parameters in details according to the modulation
types.

Modulating

Frequency

Carrier

Frequency

Carrier

Amplitude

Figure 2- 28 Display Interface of Modulated Waveform Parameter

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

AM

The modulated waveform consists of two parts: the carrier waveform and the
modulating waveform. In AM, the amplitude of the carrier waveform varies with
the instantaneous voltage of the modulating waveform. The parameters for the
AM are in Figure 2- 29

Press Mod →Type→ AM, to enter the following menu.

Figure 2- 29 Table 2- 14 Menu Explanations of the AM Parameters

Function

Menu

AM Freq

AM Depth Set the amplitude range.

Type AM Amplitude modulation.

Shape

Settings Explanation

Set the modulating waveform frequency.

Frequency range: 2mHz~20kHz
(internal source only).

Sine

Square

Triangle
UpRamp
DnRamp

Noise

Arb

Choose the modulating waveform.
To change the carrier waveform
parameter, press Sine, Square, Ramp,
Arb

Term Explanation
Modulation Depth

The amplitude range (also called ‘Percentage Modulation’). Modulation depth
varies from 0% to 120%.

In the 0% modulation, the output amplitude is the half of the set one. 
In the 100

modulation, the output amplitude is the same with the set 

one.

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FM

The modulated waveform consists of two parts: the carrier waveform and the
modulating waveform. In FM, the frequency of the carrier waveform varies with
the instantaneous voltage of the modulating waveform. The parameters for the
FM are as shown in Figure 2- 30.

Figure 2- 30 Setting Interface of FM Waveform Parameter

Press Mod →Type→ FM, to enter the following menu.

Figure 2- 31 Table 2- 15 Menu Explanations of the FM Parameters

Function

Menu

FM Freq

FM Dev Set the maximum frequency deviation

Type FM Frequency modulation

Shape

Settings Explanation

Set the modulating waveform frequency.

Frequency range 2mHz~20kHz (internal
source).

Sine

Square

Triangle
UpRamp
DnRamp

Noise

Arb

Choose the modulating waveform. To
change the carrier waveform parameter,
press Sine, Square, Ramp, Arb

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Term Explanation
Frequency Deviation

The deviation should be equal to or less than the carrier waveform 

frequency.

The sum of the deviation and the carrier frequency should be equal to 

or less than maximum frequency of the selected function.

ASK

ASK is a form of modulation that represents digital data as variations in the
amplitude of a carrier wave. The amplitude of an analog carrier signal varies in
accordance with the bit stream (modulating signal), keeping frequency and
phase constant. The parameters for the ASK are as shown in Figure 2- 32

Figure 2- 32 Setting Interface of ASK Waveform Parameter

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Press Mod →Type→ ASK, to enter the following menu.

Figure 2- 33 Table 2- 16 Menu Explanations of the ASK Parameters

Function

Menu

Key Freq

Type ASK Amplitude shift keying modulation.

Settings Explanation

Set the frequency at which the output

amplitude shifts between the carrier
amplitude and zero (internal modulation
only): 2mHz~50kHz.

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FSK
The FSK Modulation is a modulation method, the output frequency of which
switches between two the pre-set frequencies (carrier waveform frequency and
the hop frequency). The frequency at which the output frequency switches is
called the key frequency.

Figure 2- 34 Setting Interface of FSK Waveform Parameter

Press Mod →Type→ FSK, to enter the following interface

Figure 2- 35 Table 2- 17 Menu Explanations of the FSK Parameters

Function

Menu

Key Freq

Type FSK Frequency shift keying modulation.

Hop Freq Set the hop frequency.

Settings Explanation

Set the frequency at which the output

frequency shifts between the carrier
frequency and the hop frequency (internal
modulation only):
2mHz~50kHz.

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PM

The modulated waveform consists of two parts: the carrier waveform and the
modulating waveform. In PM, the phase of the carrier waveform varies with the
instantaneous voltage level of the modulating waveform. The parameters for
the PM are as shown in Figure 2- 36.

Figure 2- 36 Setting Interface of PM Waveform Parameter

Press Mod →Type →PM, enter the following interface.

Figure 2- 37 Table 2- 18 Menu Explanations of the PM Parameters

Function

Menu

PM Freq Set the modulating waveform frequency.

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Settings Explanation

Frequency range:
2mHz~20kHz

Phase

Dev

Type PM Phase modulation

Shape

Range from 0° ~ 360°.

Sine

Square

Triangle
UpRamp
DnRamp

Noise

Arb

Choose the modulating waveform.
To change the carrier waveform parameter,
press Sine, Square, Ramp, Arb

PWM

The modulated waveform consists of two parts: the carrier waveform and the
modulating waveform, the carrier waveform is only pulse. In PWM, the pulse
width of pulse varies with the instantaneous voltage of the modulating waveform.
The parameters for the FM are as shown in Figure 2- 38.

Figure 2- 38 Setting Interface of PWM Waveform Parameter

Press Mod→ Pulse →PWM, to enter the following menu.

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Figure 2- 39 Table 2- 19 Menu Explanations of the PWM Parameters

Function

Menu

PWM Freq

Width Dev

Duty Dev

Type PWM Amplitude modulation.

Shape

Settings Explanation

Set the modulating waveform

frequency. 2mHz~20kHz

Set the width or Duty range.

Sine

Square

Triangle
UpRamp
DnRamp

Noise

Arb

Choose the modulating waveform.
The carrier waveform is pulse.

DSB-AM

Press Mod→ Type →DSB-AM. The parameters for the DSB-AM are as shown
in Figure 2- 40.



Figure 2- 40 Setting Interface of DSB-AM Waveform Parameter

Figure 2- 41 Table 2- 20 Menu Explanations of the DSB-AM Parameters

Function

Menu

Settings Explanation

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DSB Freq

Type DSB-AM Amplitude modulation.

Shape

Set the modulating waveform frequency.

Frequency range: 2mHz~20kHz

Sine

Square

Triangle
UpRamp
DnRamp

Noise

Arb

Choose the modulating waveform.
To change the carrier waveform parameter,
press Sine, Square, Ramp, Arb

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2.8. To Generate Sweep

In the frequency sweep mode, the function generator ‘steps’ from the start
frequency to the stop frequency at the sweep time you specify. Sweep can be
generated by sine, square, ramp or arbitrary waveforms (pulse, noise and DC
are not allowed).

Figure 2- 42 Setting Interface of Sweep Waveform Parameter

Press Sweep button to enter the following menu. Set the waveform parameters
by using the operation menu.

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Figure 2- 43 Table 2- 21 Menu Explanations of Waveform Sweep (Page 1/2)

Function

Menu

Swp Time

Stop Freq
Freq Span
Start Freq

Mid Freq

Source

Settings Explanation

Set the time span of the sweep in which
the frequency changes from the start
frequency to stop frequency.

Internal Choose internal source.

External Choose external source.

Manual Set the start and stop time by hand.

Set the stop frequency of the sweep;
Set the frequency span of the sweep.
Set the start frequency of the sweep;
Set the center frequency of the sweep.

Sweep Frequency Setting

Use start freq and stop freq or center freq and freq span to set the range of the
frequency. Press the button again to switch between each other.

Figure 2- 44 Table 2- 22 Menu Explanations of Waveform Sweep (Page 2/2)

Function

Menu

Linear/

Log

Direct

Settings Explanation

Set the sweep with linear spacing;
Set the sweep with logarithmic spacing.
Sweep upward;
Sweep downward.

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2.9. To Generate Burst

Burst function can generate versatile waveforms in burst, which can last specific
times of waveform cycle (N-Cycle burst), or when external gated signals (gated
burst) is applied, any waveform could be used, but noise can only be used in
Gated Burst.

Press Burst button to enter the following interface. Set the waveform
parameters by using the operation menu.

Figure 2- 45 Setting Interface of Burst Waveform Parameter

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Set the N-Cycle Burst

Press Burst → N Cycle, to enter the following interface.

Figure 2- 46 Table 2- 23 Menu Explanations of the N-Cycle Parameters(Page 1/2)

Function

Menu

Period Set the burst Period.

Start

Phase

NCycle

Gated

Source

Settings Explanation

Set the start phase of the burst.

Use the N-Cycle mode.

Use the Gated mode.

Internal Choose internal source.

External Choose external source.

Manual

Choose external source, set the start time by
hand.

Burst Period

Set the time span between an N-Cycle burst and the next. If necessary the
period will increase to allow the specific number of cycles in a burst. Burst
Period>Carrier Period × Burst Number

Start Phase

Define the start point in a waveform. The phase varies from 0° to 360°, and the
default setting is 0°. For an Arbitrary Waveform, 0° is the first waveform point.

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N-Cycle/Gated

N-Cycle has specific number of waveform cycles, and every burst is activated
by a trigger event. Gated burst use external source to control burst as when to
be activated.

Figure 2- 47 Table 2- 24 Menu Explanations of the N-Cycle Parameters (Page2/2)

Function

Menu

Cycles/

Infinite

Delay Set the delay time before the burst starts.

Settings Explanation

Set the number of the bursts in a N-Cycle.
Set the number of the bursts in a N-Cycle to
be infinite.

Cycles

Set the number of waveform cycle in an N-Cycle (1 to 50,000 or Infinite).
If you choose Infinite, then a continuous waveform will be generated which will
not stop until a trigger event happens.

If needed, Burst Period will increase to cater to the specific number 

of cycles.

For an infinite-cycle burst, external or manual trigger is needed to 

activate burst.

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Delay

Set the time delay between the trigger input and the start of the N-Cycle burst.
The max delay is 240ns.

Set the Gated Burst

Press Burst →Gated, to enter the following interface.

Figure 2- 48 Table 2- 25 Menu Explanations of the Gated Burst Parameters

Function

Menu

NCycle

Gated

Polarity

Settings Explanation

Set the NCycle mode;

Set the gated mode.

Positive

Negative

Set the polarity for the gated signal.

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2.10. To Store and Recall

Press Store/Recall button to enter the following interface. You can save or recall
the state documentation inside the generator. The state file on the U Disk is also
allowed to recall or delete. File names can only be English. User can only recall
or delete the data documentation you save via CSV of the Oscilloscopes.

Figure 2- 49 Save and Read Interface

Figure 2- 50 Table 2- 26 Menu Explanations of Save and Recall (Page 1/2)

Function

Menu

File Type

Browser

Save

Recall

Delete Delete the se le c te d file .

Settings Explanation

State

Data

Directory

File

The setting of the generator;
Arbitrary waveform file;

Shift between the directory and file.
Save the waveform to the appointed

place.
Recall the waveform or setting
information in the specific position of the
memory.

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About the Browser

The directory selection shift is done by the direction keys. In the directory mode,
pressing the right key will open the lower directory while the left key will fold the
directory. Up and down key are used to shift between the directories;

To Save the Instrument State

Users are allowed to store the instrument state in any of the 10 non-volatile
memories. The state storage will ‘memorize’ the selected function (including the
arbitrary waveform, frequency, amplitude, DC offset, duty cycle, symmetry, and
other modulation parameter used.)

To save the instrument state, the procedures are given as followed:

1. Choose the file type to store
Press Store/Recall →Type→ State, and choose state as the storage type.

2. Choose the location of the file.
There are ten positions in the Local(C :), choose anyone of them by rotating
the knob.

3. Name the file and save it
Press Save button, enter the desired name. Press Save to finish.

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To Use USB Storage

As is shown in Figure 2- 51, the storage location is divided into: The internal
storage Local(C :) and the U Disk storage USB Device (A :). At the left side of
the front panel, there is a USB interface. When a USB storage is connected, the
storage menu will show ‘USB Device (A:)’. Otherwise, the default location is the
internal location Local(C :).

Figure 2- 51 USB Storage Interface

1. Install the USB Device
Insert the USB Device into the USB interface on the front panel, and the
screen will show ‘USB flash device plug in’, and storage menu will show
‘USB Device (A :)’

2. Choose the USB Device
Press Browser->Directory, move the cursor with the up or down direction
key to select ‘USB Device (A :)’. Press the right key to open the lower
directory, use the up and down direction key to choose the file ‘SFG-20X’.
Use the right key to open the lower directory, and up and down key to select
the file ‘Workspace’. Input the file name and save.

3. Remove the USB Device

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Remove the USB Device from the interface. The system will inform you
‘USB flash device plug out’, and the ‘USB Device (A :)’ in the storage menu
will disappear.

Note: USB Device can only be used by U Disk; portable hard disk is not
supported.

To Save a File

Press Store/Recall →Store, to enter the following interface. Enter the desired
file name in the ‘File Name’ frame. In the middle of the figure below is the input
keypad, used to edit the file name. Use the up and down direction keys and knob
to select the desired character; use the left and right direction keys to edit the
input file name.

Figure 2- 52 File Storage Interface

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Figure 2- 53 Table 2- 27 Menu Explanation of File Storage

Function

Menu

Input

Type
Select Select the current character.
Delete Delete the current character.

Save Store the file with the current name

Settings Explanation

En English input.

1. English Input

The alphnumeric input interface is as shown in Figure 2- 54, to save a file named
‘NEWFILE’, follow the steps below:

Figure 2- 54 Alphanumeric Input Interface

(1) Press InType->En, to enter the alphanumeric interface.
(2) Input the file name’ NEWFILE’.

Use the Knob to adjust the cursor’s horizontal position and the up and down
key to adjust the vertical position. Select the Character ‘N’ and press Select.

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Repeat this until you have inputted ‘NEWFILE’.

(3) Edit the File Name

When you have entered a wrong character, move the cursor to the wrong
character to be deleted and press Delete to remove it. Reenter the file
name.

(4) Press Save, to finish and save the file.

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2.11. To Set the Utility Function

With the Utility Function, you can set the parameters of the generator such as:
DC On/Off, Sync On/Off, Output Parameter, Interface Parameter, System
Setting and Testing Parameter. The DC switch offers the options of DC output
or Arbitrary Waveform Output. Sync Switch offers the option to choose the Sync
Signal or not. Output Setting provides the parameter setting for Load/HighZ and
Normal/Inverse. The System Setting provides the setting for Language,
Display, Beep, Screen Guard, Format, Power System Configure and default
setting; Test provides the self-testing and calibration function.

Press Utility button, to enter the Utility Menu. Its functions are listed below in
Figure 2- 55

Figure 2- 55 Table 2- 28 Menu Explanations of Utility System Setting (P age1/2)

Function

Menu

DC

Output

Setup

Sync Set the sync output

Settings Explanation

On
Off

Set the output waveform to be DC.
Set the output waveform to be arbitrary.

Set the output parameter.

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Figure 2- 56 Table 2- 29 Menu Explanations of Utility System Setting (Page2/2)

Function

Menu

System Set the system configuration.

Test/Cal Test and calibrate the instrument.

EditInfo Information of the system.

Update Update function.

Settings Explanation

To Set the DC Output

Press Utility →DC→DC On, to enter the following interface. Please note that
there is a ‘DC On’ sign at the middle left of the screen.



Figure 2- 57 DC Setting Interface

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DC Offset

Set the DC voltage level.

To Shift into the Arbitrary Waveform Output

1. Press Utility →DC→DC Off, to close DC output and return to arbitrary
waveform output.

2. Press any functional button, and the waveform output setting turns into the
arbitrary waveform output. The DC output is turned off automatically.

To Set IO

Press Utility →IO Setup, to set the IO interface. The equipment stands for RAW
protocol and TMC protocol, user may setup corresponding protocol by IO
Setup.

To Set Output Parameter

Press Utility →Output Setup, to enter the following interface.

Figure 2- 58 Table 2- 30 Menu Explanations of Output Setting (Page 1/2)

Function

Menu

Load

HighZ

Normal

Invert

Settings Explanation

Set the load connected to the Output
Connector;
Set the load connected to the Output
Connector to be HighZ.
Normal output;
Inverse output.

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1. To Set the Output Load

For the [Output] connector on the front panel, the generator has a built-in
50Ω series impendence. If the actual load does not match the set one, the
displayed amplitude and offset will be incorrect. This function is used to
match the displayed voltage with the expected one.

Steps for setting the load:
Press Utility →Output Setup→ Load, to enter the following interface.
Please note that the load parameter shown on the right bottom
is the default setting when the power is on or the pre-set load value. If the
current value is valid for the output, then current value will be used.

Figure 2- 59 Set the Output Load

Instruction

SFG-20X Series has a fixed 50Ω Series Impendence. No matter what value the
set parameter is, if the real load is different from the set one, the displayed voltage

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will not equal the real voltage.

2. To Set the Invert Waveform

Press Utility →Output Setup→ Invert, to set the Inverse Waveform Output.
When the waveform is inverse, no offset will change.

3. To Set the Sync Output

The generator provides Sync output through the [Sync] connector on the rear
panel. All standard output functions (except DC and Noise) have a
corresponding Sync signal. For some applications, they can be disabled if users
do not want to use it,

In the default setting, the Sync signal should be connected to the 

[Sync] connector (activated). When the Sync Signal is disabled, the
output voltage of the [Sync] connector is level low.

In the Inverse Mode, the Waveform that corresponds to the Sync 

Signal does not inverse.

The Sync Signal is a Pulse Signal with fixed positive pulse width, 

which is more than 50ns.

For non-modulated waveform, the Sync Signal reference is the 

carrier.

For internal modulating AM, FM and PM, the Sync signal reference is 

the modulated signal (not the carrier signal).

For ASK and FSK, the Sync Signal Reference is the keying 

Frequency.

For a Sweep, when the sweep starts, the Sync Signal becomes TTL 

Level High. The Sync frequency equals the specific Sweep time.

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For the Burst, when the burst starts, the Sync Signal is Level High. 
For the External Gated Burst, the Sync Signal follows the External 

Gated Signal.

To Set the System

Press Utility → System, to enter the following interface.

Figure 2- 59 Table 2- 31 Menu Explanations of System Setup (Page 1/2)

Function

Menu

Number

format

Language Set the display language.

Power On

Set to

Default

Settings Explanation

Default

Last

Set the number format.

All the settings return to default when
powered;
All the settings return to the last one when
powered.

Set all the settings to default.

Figure 2- 60 Table 2- 32 Menu Explanations of System Setup (Page 2/2)

Function

Menu

Beep

ScrnSvr

Settings Explanation

On

Off
1min
5min

15min
30min

1hour
2hour
5hour

Open beep;
Close beep.

Activate the screen saver program.
Screen saver will be on if no action is
taken within the time that you have
selected. Press any button the resume.

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Off Deactivate the screen saver program.

Key points:
Power On

Choose the configuration setting when the machine is powered.
Two choices are available: the default setting and the latest. Once selected, the
setting will be used when the instrument is powered.

Beep

Activate or deactivate the sound when an error occurs from the front panel or
the remote interface. Activate or deactivate any sound made by the button or
knob on the front panel. The current setting is stored in the non-volatile memory.

1. Set the Format

Press Utility →System→ Number Format, to enter the following interface.

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Figure 2- 61 Set the number Format

Figure 2- 62 Table 2- 33 Menu Explanations of Setting the Number Format

Function

Menu

Point

Separator

Settings Explanation

Using dot to represent point;

Using comma to represent point.
On
Off

Space

Enable the Separator;

Close the Separator;

Use Space to separate.

According to the different choices of the point and the separator, the format can
have various forms.

(1) as point, press Separator->On, the example is as followed:

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Figure 2- 63 Set Format

(2) as point, press ->Separator->On, the example is as followed:

Figure 2- 64 Set Format

(3) as point, press Separator->Off, the example is as followed:

Figure 2- 65 Set Format

(4) as point, press Separator->Off, the example is as followed:

Figure 2- 66 Set Format

(5) as point, press Separator->Space, the example is as followed:

Figure 2- 67 Set Format

(6) as point, press Separator->Space, the example is as followed:

Figure 2- 68 Set Format

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2. Language Setup

The SFG-20X Series Generator offers two languages (English and Simplified
Chinese) for user to choose.
To Select Language, press Utility and then Language to select the language.
The Procedure is as followed:
Press Utility →System→ Language, to change the language.

3. To Return to Default Setting

Press Utility →System→ Set to Default, to set the system to the default setting.
The default settings of the system are as followed:

Table 2- 34 Factory Default Setting

Output Default

Function Sine Wave

Frequency 1kHz

Amplitude/Offset 4Vpp/0Vdc

Phase 0°

Terminals High Z

Modulation Default

Carrier 1kHz Sine Wave

Modulating 100Hz Sine Wave

AM Depth

FM Deviation 500Hz

Key Freq 100Hz
Key Freq 100Hz

FSK Hop Frequency 1MHz

Phase Deviation 180°

100

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Sweep Default

Start/Stop Frequency 100Hz/1.9kHz

Sweep Time 1S

Trig Out Off

Mode Linear

Direction ↑

Burst Default

Period 10ms
Phase 0°

Count 1Cycle

Trig Off

Trigger Default

Source Internal

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2.12. Test/Cal

Press Utility →Test/Cal, to enter the following menu.

Figure 2- 69 Test/Cal function Menu

Figure 2- 70 Table 2- 35 Menu Explanations of Test Setting

Function

Menu

SelfTest Perform system self-test.

SelfCal Do self calibration

Settings Explain



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SelfTest

Press Utility →Test/Cal →SelfTest, to enter the following menu.

Figure 2- 71 Table 2- 36 Menu Explanations of Self Test

Function

Menu

Scr Test Run screen test program.

Key Test Run keyboard test program.

LED Test Run LED test program.

Settings Explain

1. Scr Test

Select Scr Test to enter the screen test interface. The clew words ‘Press ‘7’ Key
to continue, Press ‘8’ Key to exit’ is displayed. You could press the ‘7’ for test.

Figure 2- 72 Screen Test Interface

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2. Key Test

Select ‘keyboard Test’ to enter the keyboard test interface, the on-screen lathy
rectangle shapes represent the front panel keys. The shapes with two arrows
beside them represent the front panel knobs. Test all keys and knobs and you
should also verify that all the backlit buttons illuminate correctly.

Note:

When you operate, the screen would display the white (color LCD). 
The tested button or knobs corresponding area would display green 

(color LCD).

At the bottom of the screen display ‘Press ‘8’ Key Three Times to exit’ 

information prompt to show that press ‘8’ three times for quitting the
test.

Figure 2- 73 Key Test Interface

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3. LED Test

Select ‘LED Test’ to enter the lighten interface, the on-screen lathy rectangle
shapes represent the front panel keys; the shapes with two arrows beside them
represent the front panel knobs. The clew words ‘Press ‘7’ Key to continue,
‘Press ‘8’ Key to exit’ is displayed, You could press the ‘7’ button continuously
for testing, when buttons are lighted ,the corresponding area on the screen
would display green(color LCD).

Figure 2- 74 Led Test Interface

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SelfCal

Press Utility →1/2→Test/Cal →SelfCal, to enter SelfCal, as is shown in Figure
2- 5
SelfCal: do self calibration, environment you use the generator changes,
system may calibrate data based on change of current environment



Figure 2- 75 SelfCal Interface

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2.13. Edition Information

Press the EditInfo option button of the Utility Menu to view the generator’s
hardware and software configuration.



Figure 2- 76 Edit Info Interface

Edition Information introduce

Boot-strap No:

The times of boot-strap

Software version:

Software version of current equipment

Hardware version:

02-00-00-21-25 represents ordinally: PCB version, BOM version, Daughter
card version, FPGA version, CPLD version.

Model:

Contains information of brand of product, series, bandwidth.
For example: SFG-210 represents GLOBAL SPECIALTIES’s 200 series

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function/arbitrary waveform generator, the bandwidth is 10 MHz.

Serial No:

Bit 1-6 represent maker and series of the product. Bit 7-10 represent production
date. Bit 11-14 represent serial number of product.
For example: SFG00004130008 represents the eighth generator made by
GLOBAL SPECIALTIES in the fourth quarter of 2013.

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2.14. Updating Firmware

Using USB flash drive update firmware

The software of the generator can be updated directly via USB flash drive. This
process takes about two minutes. Follow the next steps:

1. Insert USB flash drive with firmware procedure to USB host interface on the
front panel of the generator.

2. Press the Utility button to enter the ‘Utility Menu’.

3. Press ‘1/2’ option button to enter the second page of ‘Utility Menu’.

4. Press the ‘Update’ option button.

5. Press ‘Brower’ option button to select ‘Directory’, then select the ‘USB
Device (A:)’ through direction key.

6. Press ‘Brower’ option button to select ‘File’, then select the ‘XXXX.ADS’ file
by direction key.

7. Press the ‘Recall’ option button to updating.

8. After accomplish update, restart the generator.

Note: Don’t cut off the power during product is being updating.

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2.15. How to Use the Built-in Help System

You can get a particularly help for every button on the front panel by using the
built-in help system. Or you can get help about the operation of the front panel
buttons with the help list.
Press Help to enter the following interface.

Figure 2- 77 Help Menu

Figure 2- 78 Table 2- 37 Help Menu Explanations

Function

Menu

Th
e
im

Th
e
im

Settings Explanation

Cursor upward to select.
Cursor downward to select.

Choice Select to read the information.

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3. Application and Examples

To help the user master how to use the Function/ Arbitrary Waveform Generator
more efficiently, we will describe some examples in detail. All the examples
below use the default setting of the instrument except especial explanations.

This chapter includes the following topics:

Example 1: Generate a Sine Wave 
Example 2: Generate a Square Wave 
Example 3: Generate a Ramp Wave 
Example 4: Generate a Pulse Wave 
Example 5: Generate a Noise Wave 
Example 6: Generate an Arbitrary Wave 
Example 7: Generate a Sweep Wave 
Example 8: Generate a Burst Wave 
Example 9: Generate an AM Wave 
Example 10:Generate a FM Wave 
Example 11:Generate a PM Wave 
Example 12:Generate a FSK Wave 
Example 13:Generate an ASK Wave 
Example 14:Generate a PWM Wave 
Example 15:Generate a DSB-AM Wave 

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3.1. Example 1:Generate a Sine Wave

Generate a sine wave with 50 kHz frequency, 5 Vpp amplitude and 1 Vdc offset.

 Steps:

Set the frequency. 

1. Press Sine →Freq and choose frequency which will display in white color.

2. Input ‘50’ from the keyboard and choose the unit ‘kHz’. The frequency is set
to be 50kHz.

Set the amplitude. 

1. Press Ampl to choose Ampl which will display in white color.

2. Input ‘5’ from the keyboard and choose the unit ‘Vpp’. The amplitude is set
to be 5Vpp.

Set the Offset. 

1. Press Offset to choose Offset which will display in white color

2. Input ‘1’ from the keyboard and choose the unit ‘Vdc’. The offset is set to be
1Vdc.

When the frequency, amplitude and offset are set, the wave generated is shown
in Figure 3- 1;

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Figure 3- 1 Sine Waveform

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3.2. Example 2:Generate a Square Wave

Generate a square wave with 5kHz frequency, 2Vpp amplitude, 0Vdc offset and
30% duty cycle.

 Steps:

Set the frequency. 

1. Press Square →Freq and choose Frequency which will display in white
color.

2. Input ‘5’ from the keyboard and choose the unit ‘kHz’. The frequency is set
to be 5kHz.

Set the amplitude. 

1. Press Ampl to choose Ampl which will display in white color.

2. Input ‘2’ from the keyboard and choose the unit ‘Vpp’. The amplitude is set
to be 2Vpp.

Set the offset. 

1. Press Offset to choose Offset which will display in white color

2. Input ‘0’ from the keyboard and choose the unit ‘Vdc’. The Offset is set to be
0Vdc.

Set the duty 

1. Press Duty to choose Duty which will display in white color

2. Input ‘30’ from the keyboard and choose the unit ‘%’. The duty is set to be
30%.

When the frequency, amplitude, offset and duty cycle are set, the wave
generated is shown in Figure 3- 2.

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Figure 3- 2 Square Waveform

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3.3. Example 3:Generate a Ramp Wave

Generate a ramp wave with 10μs period, 100mVpp amplitude, 20mVdc offset,
45°phase and 30% symmetry.

 Steps:

Set the period. 

1. Press Ramp →Freq and choose Period which will display in white color.

2. Input ‘10’ from the keyboard and choose the unit ‘μs’. The period is set to
be 10μs.

Set the amplitude. 

1. Press Ampl to choose Ampl which will display in white color.

2. Input ‘100’ from the keyboard and choose the unit ‘mVpp’. The amplitude is
set to be 100mVpp.

Set the offset. 

1. Press Offset to choose Offset which will display in white color

2. Input ‘20’ from the keyboard and choose the unit ‘mVdc’. The offset is set
to be 20mVdc.

Set the phase 

1. Press Phase to choose Phase which will display in white color

2. Input ‘45’ from the keyboard and choose the unit ‘ °’. The phase is set to be
45°.

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Set the symmetry 

1. Press Symmetry to choose Symmetry which will display in white color.

2. Input ‘30’ from the keyboard and choose the unit ‘30%’. The symmetry is set
to be 30%.

When the period, amplitude, offset, phase and symmetry are set, the wave
generated is shown in Figure 3- 3:

Figure 3- 3 Ramp Waveform

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3.4. Example 4:Generate a Pulse Wave

Generate a pulse wave with 5kHz frequency, 5V high level, -1V low level, 40μs
pulse width and 20ns delay.

 Steps:

Set the frequency. 

1. Press Pulse → Freq and choose Freq, which will display in white color.

2. Input ‘5’ from the keyboard and choose the unit ‘kHz’. The frequency is set
to be 5 kHz.

Set the high level 

1. Press Ampl and choose the HLevel which will display in white color.

2. Input ‘5’ from the keyboard and choose the unit ‘V’. The high level is set to
be 5V.

Set the low level 

1. Press Offset and choose the LLevel which will display in white color.

2. Input ‘-1’ from the keyboard and choose the unit ‘V’. The low level is set to
be -1V.

Set the pulse width 

1. Press PulWidth and choose PulWidth which will display in white color.

2. Input ‘40’ from the keyboard and choose the unit ‘μs’. The pulse width is set
to be 40μs.

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Set the Rising Edge 

1. Press Rising Edge and choose Rising Edge which will display in white color.

2. Input ‘20’ from the keyboard and choose the unit ‘ns’. The delay is set to be
20ns.

When the frequency, high level, low level, pulse width and delay are set, the
wave generated is shown in Figure 3- 4

Figure 3- 4 Pulse Waveform

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