Global Specialties Global Specialties SFG-205 Manual
SFG-20X
5 &10 MHz Arbitrary/ Function
Waveform Generators
User
Manual
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
Do not operate the instrument in the presence of ammable gases or fumes.
Operation of any electrical instrument in such an environment constitutes a denite
safety hazard.
KEEP AWAY FROM LIVE CIRCUITS
Instrument covers must not be removed by operating personnel. Component
replacement and internal adjustments must be made by qualied maintenance
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
rendering rst aid and resuscitation, is present.
DO NOT SUBSTITUTE PARTS OR MODIFY THE INSTRUMENT
Do not install substitute parts or perform any unauthorized modications to this
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
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1
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.
Refer servicing to qualied personnel.
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
line fuses. For continued re protection, replace fuses only with those of the specied
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
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.
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
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
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.
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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
1.2. Handle Adjustment
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
1.3. The Front/Rear Panel
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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
17. USB Connector
Figure 1- 4 Rear Panel of SFG-20X Series
1. USB Interface
2. AC Input Receptacle
Figure 1- 5 Display Interface (Sine Wave is the default display signal)
Waveform
Display area
Parameter area
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.
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,
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.
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
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
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.
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.
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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.
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.
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
Figure 2- 2 Table2- 1 Menu Explanations of Sine Waveform
To Set the Output Frequency/Period
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
Function
menu
Explanations
Freq/
Period
Set the signal frequency or period;
The current parameter will be switched at a
second press.
Ampl/
HLevel
Set the signal amplitude or high level;
The current parameter will be switched at a
second press.
Offset/
LLevel
Set the signal offset or low level;
The current parameter will be switched at a
second press.
Phase
Set the phase of the signal;
to change its value.
Figure 2- 3 Setting the Frequency
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).
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.
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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.
Figure 2- 5 Setting the Offset
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