Synthesized Function Generator
SFG-2000/SFG-2100 Series
USER MANUAL
GW INSTEK PART NO. 82FG-21200MD
This manual contains proprietary information, which is protected by
copyrights. All rights are reserved. No part of this manual may be
photocopied, reproduced or translated to another language without
prior written consent of Good Will company.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve products and reserves
the rights to change specification, equipment, and maintenance
procedures at any time without notice.
ISO-9001 CERTIFIED MANUFACTURER
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng City, Taipei County 236, Taiwan.
Table of Contents
Table of Contents
SAFETY INSTRUCTIONS ................................................... 5
SFG-2000 Series User Manual
FREQUENCY MODULATION........................................... 38
COUNTER INPUT............................................................ 40
Safety Symbols......................................................... 5
Safety Guidelines ..................................................... 6
GETTING STARTED........................................................... 9
Technical background .............................................10
Lineup/Features......................................................12
Front Panel .............................................................13
Rear Panel...............................................................19
Set Up.....................................................................20
Operation Shortcuts ...............................................22
Default Setting Contents.........................................24
SINE/SQUARE/TRIANGLE WAVE.....................................25
Select the waveform................................................26
Set the Frequency....................................................26
Set the Duty Cycle (Square Waveform) ...................28
Set Amplitude .........................................................29
Set Offset................................................................30
TTL CMOS OUTPUT.........................................................31
Select the waveform................................................32
Set the Frequency....................................................32
Set the Duty Cycle...................................................33
Set Amplitude .........................................................34
STORE/RECALL SETTING................................................ 42
APPLICATION EXAMPLES ............................................... 44
Reference Signal for PLL System ............................ 44
Trouble-Shooting Signal Source..............................44
Transistor DC Bias Characteristics Test.................. 45
Amplifier Over-Load Characteristic Test.................46
Amplifier Transient Characteristics Test .................46
Logic Circuit Test.................................................... 48
Impedance Matching Network Test ........................ 48
Speaker Driver Test.................................................49
Sweep for Speaker Test...........................................50
FAQ ................................................................................. 51
APPENDIX ....................................................................... 52
Error Messages ......................................................52
Specification...........................................................53
Declaration of Conformity ...................................... 55
INDEX ............................................................................. 56
SWEEP..............................................................................35
AMPLITUDE MODULATION ............................................37
3
4
SAFETY INSTRUCTIONS
SAFETY INSTRUCTIONS
This chapter contains important safety instructions that
you must follow when operating SFG-2000 series and
when keeping it in storage. Read the following before any
operation to insure your safety and to keep the best
condition for SFG-2000 series.
Safety Symbols
These safety symbols may appear in this manual or on
SFG-2000 series.
Warning: Identifies conditions or practices that could
WARNING
CAUTION
result in injury or loss of life.
Caution: Identifies conditions or practices that could
result in damage to SFG-2000 series or to other
properties.
Attention Refer to the Manual
Earth (ground) Terminal
SFG-2000 Series User Manual
Safety Guidelines
General Guideline
CAUTION
• Do not place any heavy object on SFG-2000 series.
• Avoid severe impacts or rough handling that leads to
damaging SFG-2000 series.
• Do not discharge static electricity to SFG-2000 series.
• Use only mating connectors, not bare wires, for the
terminals.
• Do not block or obstruct cooling vent opening.
• Do not perform measurements at power source and
building installation site (Note below).
• Do not disassemble SFG-2000 series unless you are
qualified as service personnel.
(Note) EN 61010-1:2001 specifies the measurement categories and
their requirements as follows. SFG-2000 series falls under category
II.
Power Supply
WARNING
• Measurement category IV is for measurement performed at the
source of low-voltage installation.
• Measurement category III is for measurement performed in the
building installation.
• Measurement category II is for measurement performed on the
circuits directly connected to the low voltage installation.
• Input voltage: 115/230V AC +10%, −15%, 50/60Hz
• The power supply voltage should not fluctuate more
than 10%.
• Connect the protective grounding conductor of the
power cord to earth ground, to avoid electrical shock.
Fuse
WARNING
• Fuse type: T0.125A/ 250V
• Only service personnel are allowed to access internal
fuse holders.
• Replace the fuse with the specified type and rating
only, for continued fire protection.
• Disconnect the power cord before fuse replacement.
• Make sure the cause of the fuse blowout is fixed
before fuse replacement.
5
6
SAFETY INSTRUCTIONS
SFG-2000 Series User Manual
Cleaning
SFG-2000 series
Operation
Environment
Storage
Environment
• Disconnect the power cord before cleaning.
• Use a soft cloth dampened in a solution of mild
detergent and water. Do not spray any liquid into
SFG-2000 series.
• Do not use chemicals or cleaners containing harsh
materials such as benzene, toluene, xylene, and
acetone.
• Location: Indoor, no direct sunlight, dust free, almost
non-conductive pollution (Note below)
• Relative Humidity: < 80%
• Altitude: < 2000m
• Temperature: 0°C to 40°C
(Note) EN 61010-1:2001 specifies the pollution degrees and their
requirements as follows. SFG-2000 series falls under degree 2.
Pollution refers to “addition of foreign matter, solid, liquid, or
gaseous (ionized gases), that may produce a reduction of dielectric
strength or surface resistivity”.
• Pollution degree 1: No pollution or only dry, non-conductive
pollution occurs. The pollution has no influence.
• Pollution degree 2: Normally only non-conductive pollution
occurs. Occasionally, however, a temporary conductivity caused
by condensation must be expected.
• Pollution degree 3: Conductive pollution occurs, or dry,
non-conductive pollution occurs which becomes conductive due
to condensation which is expected. In such conditions,
equipment is normally protected against exposure to direct
sunlight, precipitation, and full wind pressure, but neither
temperature nor humidity is controlled.
• Location: Indoor
• Relative Humidity: < 80%
• Temperature: −10°C to 70°C
Power cord for the United Kingdom
When using SFG-2000 series in the United Kingdom, make sure the power
cord meets the following safety instructions.
NOTE: This lead / appliance must only be wired by competent persons
WARNING: THIS APPLIANCE MUST BE EARTHED
IMPORTANT: The wires in this lead are coloured in accordance with the following code:
Green/ Yellow: Earth
Blue: Neutral
Brown: Live (Phase)
As the colours of the wires in main leads may not correspond with the colours marking
identified in your plug/appliance, proceed as follows:
The wire which is coloured Green & Yellow must be connected to the Earth terminal
marked with the letter E or by the earth symbol
The wire which is coloured Blue must be connected to the terminal which is marked with
the letter N or coloured Blue or Black.
The wire which is coloured Brown must be connected to the terminal marked with the
letter L or P or coloured Brown or Red.
If in doubt, consult the instructions provided with the equipment or contact the supplier.
This cable/appliance should be protected by a suitably rated and approved HBC mains
fuse: refer to the rating information on the equipment and/or user instructions for details.
As a guide, cable of 0.75mm2 should be protected by a 3A or 5A fuse. Larger conductors
would normally require 13A types, depending on the connection method used.
Any moulded mains connector that requires removal /replacement must be destroyed by
removal of any fuse & fuse carrier and disposed of immediately, as a plug with bared wires
is hazardous if a engaged in live socket. Any re-wiring must be carried out in accordance
with the information detailed on this label.
or coloured Green or Green & Yellow.
7
8
GETTING STARTED
GETTING STARTED
This chapter describes SFG-2000 series in a nutshell,
including main features and front/rear/display
introduction. Follow the Set Up section to properly
install and power up SFG-2000 series.
SFG-2000 series
overview
Panel
introduction
Technical background ............................................ 10
Series lineup ..........................................................12
Main features......................................................... 12
Front Panel ............................................................ 13
Rear Panel.............................................................. 19
SFG-2000 Series User Manual
Technical background
Traditional
function
generators
DDS
methodology
SFG-2000 series uses the latest Direct Digital Synthesis
(DDS) technology to generate stable, high resolution
output frequency. The DDS technology solves several
problems encountered in traditional function generators,
as follows.
Constant current circuit methodology
This analog function generating method uses a constant
current source circuit built with discrete components
such as capacitors and resistors. Temperature change
inside the generator greatly affects the components
characteristics which lead to output frequency change.
The results are poor accuracy and stability.
In DDS, the waveform data is contained in and
generated from a memory. A clock controls the counter
which points to the data address. The memory output is
converted into analog signal by a digital to analog
converter (DAC) followed by a low pass filter. The
resolution is expressed as fs/2k where fs is the frequency
and k is the control word, which contains more than
28bits. Because the frequency generation is referred to
clock signal, this achieves much higher frequency stability
and resolution than the traditional function generators.
Setup
Quick reference
9
Tilt stand ............................................................... 20
Power up................................................................ 21
Recall the default setting .......................................21
Functionality check ................................................ 21
Operation Shortcuts .............................................. 22
Default Setting Contents........................................ 24
10
GETTING STARTED
SFG-2000 Series User Manual
Block diagram
DDS synthesizer consists of Phase accumulator
(counter), lookout table data (ROM), Digital-to-analog
converter (DAC), and Low-pass filter (LPF).
Frequency
Control Word (K)
System Clock
(fs)
28bit
Phase
Accumulator
Register
Table
ROM/RAM
Digital-Analog
Converter
Low-Pass
Filter
Output (fo)
28bit
28bit
12bit
The phase accumulator adds the frequency control word
K at every clock cycle fs. The accumulator output points
to a location in the Table ROM/RAM. The DAC
converts the digital data into an analog waveform. The
LPF filters out the clock frequency to provide a pure
waveform.
Lineup/Features
Series lineup
Features
Lineup
SFG-2004 (4MHz)
SFG-2007 (7MHz)
SFG-2010 (10MHz)
SFG-2020 (20MHz)
SFG-2104 (4MHz)
SFG-2107 (7MHz)
SFG-2110 (10MHz)
SFG-2120 (20MHz)
Main features
Performance
Features
Input/Output
Terminals
Duty
cycle
Offset TTL/
CMOS
● ● ●
● ● ●
● ● ●
● ● ●
Sweep AM/
Counter
FM
― ― ―
― ― ―
― ― ―
― ― ―
● ● ● ● ● ●
● ● ● ● ● ●
● ● ● ● ● ●
● ● ● ● ● ●
• High resolution using DDS and FPGA technology
• High frequency accuracy: 20ppm
• Low distortion: −55dBc
• High resolution 100mHz maintained at full range
• Wide output frequency range: 4, 7, 10, 20MHz
• Various output waveforms: Sine, Square, and Triangle
• TTL/CMOS output
• Variable DC offset control
• Output overload protection
• Store/recall: 10 settings
• Counter up to 150MHz high frequency (SFG-2100
series)
• AM/FM with internal and external (SFG-2100 series)
• Sweep mode with LINE and LOG (SFG-2100 series)
• Frequency output
• TTL/CMOS output
• Counter input (SFG-2100 series)
• External modulation input (SFG-2100 series)
11
12
GETTING STARTED
SFG-2000 Series User Manual
Front Panel
SFG-2100 series front panel
Main
Display
Power
Switch
Sweep Span/
Sweep Time
Speed Control
Log/Lin Selector
AM/FM
Control
Waveform
selection Key
DC Offset
Control
CMOS
Amplitude
Control
Entry
Keys
Amplitude/
Attenuation
Control
Counter
Input
Editing
Knob
TTL/CMOS
Output
Cursor
Keys
Waveform
Output
Main display
(7 segment)
Shows the waveform frequency,
counter frequency, and duty cycle.
For SFG-2100 series only. In the
counter mode, indicates that the
leftmost digit (100MHz) is hidden
but contains a real number. For
counter details, see page40.
For SFG-2100 series only. In
counter mode, indicates gate
selection. For counter details, see
page40.
TTL
Indicates that the TTL or CMOS
output is enabled. For TTL/CMOS
details, see page31.
For square wavefor m only.
Indicates that the duty cycle is
being edited. For square waveform
details, see page25.
Indicates that the waveform output
is attenuated by −20dB. For
attenuation details, see page29.
SFG-2000 series front panel
Main
Display
Power
Switch
CMOS
Amplitude
Control
Waveform
selection Key
DC Offset
Control
Entry
Keys
Amplitude/
Attenuation
Control
13
Editing
Knob
TTL/CMOS
Output
Waveform
Cursor
Keys
Output
For SFG-2100 series only. Indicates
that the sweep mode is activated.
For sweep details, see page35.
For SFG-2100 series only. Indicates
that FM or AM mode is enabled.
For modulation details, see page37
(AM) or page38(FM).
For SFG-2100 series only. Indicates
that the counter mode is enabled.
For counter details, see page40.
EXT
For SFG-2100 series only. Indicates
that the external modulation input
is used. For details, see page37
(AM) or page39(FM).
14
GETTING STARTED
SFG-2000 Series User Manual
Waveform
selection key
Entry keys
Indicates the waveform shape: Sine,
Square, and Triangle. For details,
see page26.
Indicates that the Shift key is
pressed.
Indicates the output frequency:
MHz, kHz, or Hz.
Indicates the duty cycle unit. For
duty cycle details, see page28.
WAVE
Selects the waveform shape: sine,
square, and triangle. For details,
see page26.
Enters frequency, duty cycle, and various parameters.
1 2
3 7
54
DUTY
7
−20dB
8
TTL
9
MHz
AM
FM
4
SWEEP
5
kHz
Hz/%
1.2MHz
MHz
37kHz
45% (in duty cycle mode)
45Hz (in frequency mode)
Enter duty cycle (page28).
Attenuate the waveform output
by −20dB (page29).
Enables TTL/CMOS output
(page31).
Deletes previous entry
(backspace).
Selects Amplitude Modulation
(page37).
Selects Frequency Modulation
(page38).
Selects sweep mode (page35).
STORE
RECALL
1
Editing knob
Cursor keys
Wav ef orm
OUTPUT
50 Ω
output
TTL/CMOS
TTL/CMOS
OUTPUT
output
Counter input
COUNTER
INPUT
Max AC 30Vrms
6
3
2
0
Stores the parameter setting
(page42).
Recalls the parameter setting
(page42).
Recalls the default parameter
setting (page43).
Switches to counter mode
(page40).
Accepts external modulation
signal (page37-AM) or
(page38-FM).
Increases (right turn) or decreases (left
turn) the frequency or duty cycle.
Moves the editing point left or right in
case of manual editing.
Outputs sine, square, and triangle
waveform. BNC terminal, 50Ω output
impedance.
Outputs TTL or CMOS output
waveform, BNC terminal. For
TTL/CMOS mode details, see page31.
Accepts signals for frequency counting.
BNC, AC 30Vrms maximum. For
counting mode details, see page40.
15
16
GETTING STARTED
SFG-2000 Series User Manual
Amplitude/
Attenuation
control
DC offset
control
CMOS
amplitude
control
Sweep speed
control
Log/Linear
sweep selector
AMPL
−20dB
ADJ
OFFSET
-
TTL/CMOS
5V 15V
CMOS ADJ
SWEEP TIME
SLOW FAST
+
ADJ
CAL
TTL
LOG
LIN
Sets the sine/square/triangle waveform
amplitude. Turn left (decrease) or right
(increase).
When pulled out, attenuates the
sine/square/triangle waveform
amplitude by −20dB. The −20dB display
turns On.
For details, see page29.
When pulled out, sets the DC
offset level for sine/square/triangle
waveform. Turn left (decrease) or right
(increase). The range is −5V ~ +5V, in
50Ω load.
For details, see page30.
This knob becomes effective when the
TTL/CMOS output is enabled (page31).
Selects TTL as output.
When pulled out, selects CMOS
as output. Sets the CMOS output level.
Turn left (decrease) or right (increase).
This knob is available in SFG-2100
series only. It becomes effective in
sweep time mode.
Sets the sweep speed. Turn left (slow) or
right (fast). The range is 1 ~ 30 seconds.
For sweep details, see page35.
Sweep span
control
AM/FM
modulation
control
Power switch
SWEEP SPAN
0MAX
AM %
FM Dev
This knob is available in SFG-2100
series only. It becomes effective in
sweep mode and AM/FM mode.
In Sweep mode: Sets the sweep span.
Turn left (narrow) or right (wide). The
range is 1 ~ 100. For sweep details, see
page36.
In AM/FM mode:
Sets the FM deviation (page38).
Turn left (decrease) or right (increase).
The range is over −50kHz ~ +50kHz,
centered at 1MHz.
When pulled out, sets the AM
depth (page37). Turn left (shallow) or
right (deep). The range is 0 ~ 100%.
Turns the main power On/Off. For
power up sequence, see page20.
Selects linear sweep.
When pulled out, selects
logarithmic sweep.
17
18
GETTING STARTED
SFG-2000 Series User Manual
Rear Panel
External
Modulator Input
AC Power Input
External
Modulator
Input
AC Power
Input
AC Voltage
Selector
Accepts the modulation signal from external device.
BNC male connector, 10Vp-p maximum. SFG
automatically switches the modulation signal from
internal to external.
For modulation details, see page37 (AM) or page38(FM).
Accepts the AC power cord. 115 or 230V, 50/60Hz.
Set Up
Tilt stand
Pull out the
handle sideways
and rotate it.
Place SFG
horizontally,
Or tilt stand.
Place the handle
vertically for
hand carry.
AC Voltage
Selector
Selects 115V or 230V for power source.
AC 100/110/120V → select 115V.
AC 220/230/240V → select 230V.
Improper selection might lead to internal fuse
blowout.
19
20
GETTING STARTED
SFG-2000 Series User Manual
Power up
Recall the
default
setting
1. Select the AC voltage on the rear
panel accordingly.
AC 100/110/120V→select 115V.
115V
AC 220/230/240V→select 230V.
2. Connect the power cord.
3. Push and turn On the main
power switch on the front panel.
4. The display shows model name and the last setup.
Example: SFG-2110, 500Hz triangle wave in sweep
mode and −20dB attenuation enabled
Press
2
to recall the default setup. SFG shows
the message “done”, and outputs 10kHz sine wave.
Operation Shortcuts
Here are the collections of operation example shortcuts.
Sine wave 250Hz,
−20dB amplitude
OUTPUT
50 Ω
Trian g le wa v e
8kHz,
+2V Offset
OUTPUT
50 Ω
Square Wave
1MHz, 45% duty
OUTPUT
50 Ω
1. Press Wave key and select Sine
2. Press 2 + 5 + 0 + Hz/% key
3. Press Shift + 8 key (−20dB)
...Or pull Amplitude knob
1. Press Wave key and select
Triangle
2. Press 8 + kHz key
3. Pull Offset knob (ADJ) and
Rotate
1. Press Wave key and select Square
2. Press 1 + MHz key
3. Press Shift + 7 key (Duty)
4. Press 4 + 5 + Hz/% key
TTL Output 10kHz
TTL/CMOS
OUTPUT
...Or Rotate the Scroll knob
1. Press Shift + 9 key (TTL)
2. Press 1 + 0 + kHz key
3. Press TTL/CMOS knob (TTL)
WAVE
2
5 0
−20dB
8
Hz/%
or AMPL ADJ
WAVE
8
kHz
OFFSET ADJ
WAVE
MHz
1
DUTY
7
4
or
1
5
TTL
9
0
TTL
Hz/%
kHz
TTL/CMOS (TTL)
TTL
9
TTL
1
0
kHz
TTL/CMOS
(CMOS)
OUTPUT
1. Press Shift + 9 key (TTL)
2. Press 1 + 0 + kHz key
3. Pull TTL/CMOS knob (CMOS)
and rotate
Functionality
check
Connect SFG output to measurement device such as
oscilloscope and check the waveform characteristics.
CMOS Out 10kHz,
10Vpp
TTL/CMOS
21
22
GETTING STARTED
SFG-2000 Series User Manual
Linear Sweep,
1kHz start,
Sine wave 250Hz
OUTPUT
50 Ω
Log Sweep,
10kHz start,
Tria n gle w ave
8kHz
OUTPUT
50 Ω
AM, Internal,
50% modulation,
sine wave 10kHz
OUTPUT
50 Ω
FM, External,
50% deviation,
sine wave 1MHz
OUTPUT
50 Ω
1. Press Wave key and select Sine
2. Press 2 + 5 + 0 + Hz/% key
3. Press Shift + 5 key (Sweep)
4. Press SWEEP TIME knob (LIN)
and rotate
5. Press SWEEP SPAN knob and
rotate
1. Press Wave key and select
Triangle
2. Press 8 + kHz key
3. Press Shift + 5 key (Sweep)
4. Pull SWEEP TIME knob (LOG)
and rotate
5. Press SWEEP SPAN knob and
rotate
1. Press Wave key and select Sine
2. Press 1 + 0 + kHz key
3. Press Shift + .(dot) key (AM)
4. Pull SWEEP SPAN knob (AM
%) and rotate
1. Press Wave key and select Sine
2. Press 1 + MHz key
3. Input external modulation signal
(EXT sign appears)
4. Press Shift + 4 key (FM)
5. Push SWEEP SPAN knob (FM
Dev) and rotate
WAVE
2
5 0
SWEEP
5
Hz/%
SWEEP TIME LIN
SWEEP SPAN
WAVE
8
kHz
SWEEP
5
SWEEP TIME
LOG
SWEEP SPAN
WAVE
1
0
AM
kHz
SWEEP SPAN
WAVE
MHz
1
EXT
AM
SWEEP SPAN
(FM Dev)
Counter input,
sine wave 1MHz
COUNTER
INPUT
1. Press Shift + 1 (Counter)
2. The Gate sign flashes when
1
counted
Store the setting
to memory No.1
1. Press Shift + 6 (Store)
2. The “Store” sign appears
3. Enter the memory number (1 ~
STORE
6
10)
Recall the setting
from memory
No.1
4. The “done” sign appears
1. Press Shift + 3 (Recall)
2. The “Recall” sign appears
3. Enter the memory number (1 ~
RECALL
3
10)
4. The “done” sign appears
Default Setting Contents
Recall default
2
settings
Wav e t yp e
Freque ncy
TTL/CMOS
−20dB
Modulation
Sweep mode
Press the shift key, then 2 to recall the
default setting. The “done” message
appears, followed by display update.
Sine wave
10.0000kHz
Disabled
Disabled
Disabled
Disabled
23
24
SINE/SQUARE/TRIANGLE WAVE
SINE/SQUARE/TRIANGLE
SFG-2000 Series User Manual
Select the waveform
Sine / Square
/ Triangle
Press
appears on the display.
WAVE
key repeatedly. The corresponding icon
WAVE
Select waveform
Set frequency
Set duty cycle
(for square
wave)
Set amplitude
Set offset
Select the waveform............................................... 26
Enter frequency...................................................... 26
Edit frequnency...................................................... 27
Enter duty cycle...................................................... 28
Edit duty cycle........................................................ 28
Normal output .......................................................29
Attenuate by −20dB ............................................... 29
Activate offset........................................................ 30
Adjust offset .......................................................... 30
Limitation .............................................................. 30
OUTPUT
50 Ω
Set the Frequency
Enter
frequency
Enter the waveform frequency using the numerical keys.
1 2
3 7
54
MHz
Sine waveform.
Square waveform.
Triangle waveform.
The waveform comes out from the main
terminal.
10Vp-p maximum (50Ω load)
20Vp-p maximum (no load)
kHz
Hz/%
MHz
1.2MHz
37kHz
45Hz
Delete a number
(backspace)
25
26
Triangle waveform frequency is limited to
maximum 1MHz. When the input exceeds it, the
following message (Freq-Err2) appears and forces the
frequency to 1MHz.
For full error message list, see page52.
SINE/SQUARE/TRIANGLE WAVE
SFG-2000 Series User Manual
Edit
frequnency
Left cursor key moves the active
cursor left.
Right cursor key moves the active
cursor right.
Turn the editing knob left to decrease
the frequency.
Turn the editing knob right to increase
the frequency.
Set the Duty Cycle (Square Waveform)
The duty cycle setting is not available in sine/triangle waveform.
Enter duty
cycle
DUTY
7
Press the Shift key, then 7 to
enter duty cycle editing mode.
The duty sign appears on the
display.
The default value is 50%.
The settable range is 20% ~
Hz/%
54
80%, 2Hz ~ 1MHz.
Use numerical keys to enter
value.
Example: 45%
Edit duty
cycle
MHz
Delete a number (backspace)
The editing knob changes the
value, and the cursor keys
moves the active digit (same as
entering frequency).
When inactive for 5 seconds, the display automatically
goes back to previous mode (frequency view).
Setting duty cycle (press
DUTY
7
) is not available
when sine or triangle waveform is activated. The
following message appears.
27
28
For full error message list, see page52.
SINE/SQUARE/TRIANGLE WAVE
SFG-2000 Series User Manual
Set Amplitude
Normal
output
Attenuate by
−20dB
AMPL
Sine/square/triangle waveform can be attenuated by
−20dB, in two ways: −40dB altogether.
−20dB
ADJ
−20dB
Set Offset
Turn the Amplitude knob right
(increase) or left (decrease).
Activate
offset
The range is 10Vpp for 50Ω load.
Adjust offset
Method1
Pull out the Amplitude knob. The
output amplitude is attenuated by
−20dB (no display sign).
8
Method2
Press the shift key, then 8. The output
amplitude is attenuated by −20dB. The
−20dB sign appears on the display.
Limitation
SFG can add or delete offset to the sine/square/triangle
waveform, thus changing the waveform vertical position.
Use the OFFSET knob.
Pushed: Offset Off
Pulled: Offset On
OFFSET
Turn the knob right (higher position)
or left (lower position).
The range is −5V ~ +5V for 50Ω
ADJ
CAL
+
load.
-
Note that the output amplitude, including the offset, is
still limited to:
−5 ~ +5V (50Ω load)
−10 ~ +10V (no load)
Therefore excessive offset leads to peak clip as below.
29
Positive peak
clip (50Ω)
Negative peak
clip (50Ω)
30
+5V
-5V
+5V
-5V
Clipped
Offset
Offset
Clipped
TTL CMOS OUTPUT
TTL CMOS OUTPUT
SFG-2000 Series User Manual
Select the waveform
TTL/CMOS
TTL
TTL
9
TTL/CMOS
Press Shift key, then 9. The TTL sign
appears on the display.
The TTL/CMOS output is always On
when the square wave
is
activated.
Push/pull the TTL/CMOS knob to
select the waveform.
Select waveform
Set frequency
Set duty cycle
Set amplitude
Select the waveform............................................... 32
Enter frequency...................................................... 32
Edit frequency ........................................................ 33
Enter duty cycle...................................................... 33
Edit duty cycle........................................................ 34
Set Amplitude ........................................................ 34
5V 15V
CMOS ADJ
TTL
TTL/CMOS
OUTPUT
Set the Frequency
Enter
frequency
Enter the waveform frequency using the numerical keys.
1 2
3 7
54
Pushed: TTL is selected as
output.
Pulled: CMOS is selected as
output.
The waveform comes out from the
TTL/CMOS terminal.
TTL: ≥3Vp-p (fixed)
CMOS: 4V±1Vp-p ~ 15±1Vp-p
kHz
Hz/%
MHz
1.2MHz
37kHz
45Hz
31
32
MHz
Delete a number
(backspace)
TTL CMOS OUTPUT
SFG-2000 Series User Manual
Edit
frequency
Left cursor key moves the active
cursor left.
Right cursor key moves the active
cursor right.
Turn the editing knob left to decrease
the frequency.
Turn the editing knob right to increase
the frequency.
Edit duty
cycle
The editing knob changes the
value, and the cursor keys
moves the active digit (same as
entering frequency).
When inactive for 5 seconds, the display automatically
goes back to previous mode (frequency view).
Set Amplitude
CMOS
TTL/CMOS
waveform
5V 15V
CMOS ADJ
TTL
Use the TTL/CMOS knob.
Pushed: selects TTL output
with fixed amplitude, min. 3Vp-p.
Pulled: selects CMOS
output, amplitude range 4V±1Vp-p ~
15±0.5Vp-p.
Turn the knob right (increase
amplitude) or left (decrease amplitude).
Set the Duty Cycle
DUTY
7
Enter duty
cycle
33
MHz
Hz/%
54
Press the Shift key, then 7 to
enter duty cycle editing mode.
The duty sign appears on the
display.
The default value is 50%.
The settable range is 20% ~
80%, 2Hz ~ 1MHz.
Use the numerical keys to enter
value. Example: 45%
Delete a number (backspace)
34
SWEEP
SWEEP
SFG can add sweep to the waveform output, a convenient tool for measuring
the frequency response of the DUT.
Set Sweep
Time
SFG-2000 Series User Manual
Sweep time sets the time it takes for a single sweep from
the start frequency to the end frequency.
Rotate the SWEEP TIME knob, right (fast) or left
(slow).
SWEEP TIME
Activate
sweep
Select
Log/Lin
Sweep
• Sweep function applies only to SFG-2100 series.
• Sweep and Modulation (page37) cannot be used together.
1. Output the waveform. Sine/Triangle/Square
(page25) or TTL/CMOS (page31).
2. Press the Shift key, then 5 (Sweep).
SWEEP
5
3. Sweep is activated and the sign appears on the
display.
When the sweep is activated, the duty cycle of
Square/TTL/CMOS wave is fixed to 50%.
SWEEP TIME
Logarithmic Sweep:
Pull the SWEEP TIME knob.
SLOW FAST
LOG
LIN
Linear Sweep:
Push the SWEEP TIME knob.
Set Sweep
Span
SLOW FAST
Range
1 ~ 30 seconds
Note: If the sweep time becomes too long, the stop
frequency might reach the rating (4, 7, 10, or 20MHz). In
this case, the frequency stays at the rating to the end.
Sweep span sets the frequency width of the sweep.
The current output frequency becomes the start
frequency.
Rotate the SWEEP SPAN knob, right (wide) or left
(narrow).
SWEEP SPAN
0MAX
Range
1 ~ 100 frequency ratio
Note: In order to get the maximum span (frequency
ratio), set the sweep time to a sufficient length (not too
short).
35
36
AMPLITUDE MODULATION
SFG-2000 Series User Manual
AMPLITUDE MODULATION
(page25).
and the sign appears on the display.
AM
1. Pull the SWEEP SPAN knob (AM
2. Turn the knob left (shallow) or
0MAX
AM %
0 ~ 100%
%).
right (deep).
Activate AM
Set AM depth
• AM applies only to SFG-2100 series.
• Modulation and Sweep (page35) cannot be used together.
1. Output the waveform, Sine/Triangle/Square
2. Press the Shift key, then Dot (AM). AM is activated
SWEEP SPAN
Range
FREQUENCY MODULATION
• FM applies only to SFG-2100 series.
Activate FM
Set FM
deviation
• Modulation and Sweep (page35) cannot be used together.
1. Output the waveform. Sine/Triangle/Square
(page25) or TTL/CMOS (page31).
2. Press the Shift key, then 4 (FM). FM is activated and
the sign appears on the display.
FM
4
When FM is activated, the duty cycle of
Square/TTL/CMOS wave is fixed to 50%.
The output frequency becomes the Center Frequency.
1. Push the SWEEP SPAN knob
SWEEP SPAN
(FM Dev).
Use external
modulating
signal
37
SFG-2000 series uses an internal 400Hz sine wave as the
default modulating signal.
1. Connect the modulating signal to the rear panel
terminal.
2. Press the Shift key, then 0 (EXT MOD). External
modulation is activated.
0
EXT
Frequency Range
DC ~ 1MHz
38
0MAX
AM %
FM Dev
Deviation
Range
2. Turn the knob left (shallow) or
0 ~ ±50kHz, centered at 1MHz
right (deep).
Use external
modulating
signal
FREQUENCY MODULATION
When the deviation is added to the center frequency, the
result must be smaller than the rating frequency.
Center Frequency + Deviation ≤
Rating(4,7,10,20MHz)
When this rule is violated, the “Freq-Err3” error
message appears and the FM setting will be cancelled.
For more error message details, see page52.
Center frequency (=Output frequency) must be set
within this range.
SFG-2104
SFG-2107
SFG-2110
SFG-2120
Fre quency
Range
300kHz ~ 3.7MHz
300kHz ~ 6.7MHz
300kHz ~ 9.7MHz
300kHz ~ 19.7MHz
SFG-2000 series uses an internal
400Hz sine wave as the default
modulating signal.
1. Connect the modulating signal to
the rear panel terminal.
2. Press the Shift key, then 0 (EXT
MOD). External modulation is
activated.
0
EXT
1kHz (fixed)
SFG-2000 Series User Manual
COUNTER INPUT
Activate
counter
COUNTER
INPUT
Set the gate
time
Counter input applies only to SFG-2100 series.
1. Connect the signal input to the Counter input
terminal. Press Shift key, then 1 (Counter).
1
2. EXT and COUNT sign appear on the display.
EXT
3. The display shows the input signal frequency.
EXT
4. The GATE sign flashes when the gate condition is
met.
Range
Resolution
Gate time sets the display update rate and counter
resolution. These two parameters are in trade-off.
Short gate time = faster update, coarse resolution
Long gate time = slower update, fine resolution
0 ~ 150MHz
100nHz for 1Hz input,
0.1Hz for 100MHz input
39
40
To change the gate time, turn the
editing knob right (increase) or left
(decrease).
COUNTER INPUT
SFG-2000 Series User Manual
Gate time /
The following table shows the relationship between
counter frequency, gate time, resolution, and display.
Resolution
table
0.01s 100µHz 10.0000Hz
0.1s 10µHz 10.00000Hz
1s 1µHz 10.000000Hz
0.01s 1mHz 100.000Hz
0.1s 100µHz 100.0000Hz
1s 10µHz 100.00000Hz
0.01s 10mHz 1.00000kHz
0.1s 1mHz 1.000000kHz
1s 100µHz 1.0000000kHz
0.01s 10Hz 1.00000MHz
0.1s 1Hz 1.000000MHz
1s 100mHz 1.0000000MHz
0.01s 100Hz 10.0000MHz
0.1s 10Hz 10.00000MHz
1s 1Hz 10.000000MHz
0.01s 100Hz 100.0000MHz
0.1s 10Hz 100.00000MHz
1s 1Hz 100.000000MHz
Over sign
Input Gate
time
0.01s 100µHz 1.0000Hz
1Hz
10Hz
100Hz
1kHz
1MHz
10MHz
100MHz
* The OVER sign shows that the 100MHz
digit contains a real number but hidden
from the display. It turns On under the
following condition.
• Input frequency: ≥100MHz
• Gate Time: 10s
To view the 100MHz digit, switch to smaller
gate time such as 1s or 0.1s.
0.1s 10µHz 1.00000Hz
1s 1µHz 1.000000Hz
10s 100nHz 1.0000000Hz
10s 100nHz 10.0000000Hz
10s 1µHz 100.000000Hz
10s 10µHz 1.00000000kHz
10s 10mHz 1.00000000MHz
10s 100mHz 10.0000000MHz
10s 100mHz 00.0000000MHz*
Resolution Display
STORE/RECALL SETTING
Store the
panel setting
Recall the
panel setting
STORE
6
The “Store 0” sign appears.
Enter the memory number, 0 ~ 9. (for example, 1)
The “done” sign appears.
RECALL
3
The “recall 0” sign appears.
Enter the memory number, 0 ~ 9. (for example, 1)
The “done” sign appears and the panel setting changes
accordingly.
Press the Shift key, then 6 to store
the current panel setting to internal
memories.
Memory range: 0 ~ 9 (10 set)
Press the Shift key, then 3 to recall a
panel setting stored in internal
memories.
Memory range: 0 ~ 9 (10 set)
41
42
STORE/RECALL SETTING
SFG-2000 Series User Manual
Recall the
default panel
2
setting
The “done” message appears.
The panel is updated with the default setting.
Wav e t ype
Freque ncy
TTL/CMOS
−20dB
Modulation
Sweep mode
Press the shift key, then 2 to recall
the default panel setting.
Sine wave
10.0000kHz
Disabled
Disabled
Disabled
Disabled
APPLICATION EXAMPLES
Reference Signal for PLL System
Description
Block diagram
Trouble-Shooting Signal Source
Description
Block diagram
The SFG output can be used as a cost-effective reference
signal for Phase-Locked-Loop system. Directly connect
SFG output to PLL input.
SFG series
Reference In Output
The SFG output can be used as the signal source to test
the failed part in a circuit system. Isolate the problematic
part from the rest, feed the SFG output as a stimulus,
and observe the outcome using an oscilloscope.
SFG series
PLL
Oscilloscope
43
44
Circuit System
APPLICATION EXAMPLES
Transistor DC Bias Characteristics Test
Description
Block diagram
Use SFG-2000 series as the signal source for a transistor.
Compare the transistor input/output waveform using the
oscilloscope. Adjust the DC voltage source to find out
the maximum output without distorting the waveform.
SFG series
Oscilloscope
SFG-2000 Series User Manual
Amplifier Over-Load Characteristic Test
Description
Block diagram
Use the triangle wave output from SFG-2000 series to
check the amplifier output distortion caused by overload.
The common sine wave is not the ideal source in this
case. Observe the linearity of the triangle waveform
using an oscilloscope.
SFG series
Oscilloscope
Oscilloscope
display
Input
V+
Output
V-
Transistor
Triangle wave
Load
Amplifier
Amplifier Transient Characteristics Test
Description
Block diagram
Use the square wave output from SFG-2000 series to
check the transient frequency response of an amplifier.
The common sine wave is not the ideal source in this
case. Observe the waveform using an oscilloscope.
SFG series
Square wave
Oscilloscope
Load
Amplifier
45
46
APPLICATION EXAMPLES
SFG-2000 Series User Manual
Test step
Trans ie nt
characteristic
list
Note
1. Apply a triangle waveform to the amplifier first.
Adjust the waveform amplitude to make sure there is
no clipping.
2. Switch to square waveform and adjust its frequency
to the middle of the amplifier pass band, such as
20Hz, 1kHz, and 10kHz.
3. Observe the shape of the amplifier output. The
following table shows the possible output distortions
and their explanations.
• Amplitude reduction at low
frequency
• No phase shift
• Low frequency boosted (accentuated
fundamental)
• High frequency loss
• No phase shift
• Low frequency phase shift
• Trace thickened by hum-voltage
• High frequency loss
• Phase shift
• Low frequency loss
• Phase shift
• Low frequency loss
• Low frequency phase shift
• High frequency loss
• Low frequency phase shift
• Damped oscillation
For narrow band amplifier testing, square wave may not
be suitable.
Logic Circuit Test
Description
Block diagram
Use the TTL/CMOS output from SFG-2000 series to
test digital circuits. Observe the timing relation of
input/output waveform using an oscilloscope.
SFG series
TTL/CMOS Out
Digital Circuit
Oscilloscope
Impedance Matching Network Test
Description
Block diagram
Test step
Use SFG-2000 series for impedance matching network:
testing its frequency characteristic and matching the
impedance.
Adjust the potentiometer until V2 becomes the half of
V1 (V2=0.5V1). Then the impedance Z of the network
becomes identical to the potentiometer.
47
48
APPLICATION EXAMPLES
Speaker Driver Test
Description
Block diagram
Use SFG-2000 series for testing the frequency
characteristics of audio speakers. Record the volt reading
versus the input signal frequency.
SFG-2000 Series User Manual
Sweep for Speaker Test
Description
Test
description
Block diagram
Use the sweep feature in SFG-2000 series for testing the
frequency response of an audio speaker.
1. Set SFG output to sine wave, 20Hz.
2. Activate sweep and set LIN/LOG, sweep time, and
sweep span.
3. Change the frequency if other bands need to be
tested.
SFG series
Graph
The peak voltage occurs on the resonant frequency of
the speaker.
Peak of Audio Drive Response
Correspondent
Response (dB)
Frequency (Hz)
Amplifier
Speaker
49
50
FAQ
SFG-2000 Series User Manual
FAQ
● I pressed the Power key on the front panel but nothing happens.
●
How can I get out of Counter/Sweep/Modulation/TTL/−20dB mode?
● The device accuracy does not match the specification.
● What are these error messages?
I pressed the Power key on the front panel but nothing happens.
Make sure the AC source voltage setting on the rear
panel is correct (page21). Otherwise the internal fuse
might be blown out. Contact the service personnel.
How can I get out of Counter/Sweep/Modulation/TTL/−20dB mode?
Press the Shift key, then the relevant numerical key. (Do
the same action as you entered those modes)
For example: To get out of Counter mode, press Shift
then 1.
The device accuracy does not match the specification.
Make sure the device is powered On for at least 30
minutes, within +20°C~+30°C. This is necessary to
stabilize the unit to match the specification.
What are these error messages?
Several messages appear when trying to set the frequency
or duty cycle in forbidden way. Page52 summarizes all
the error message content.
If there is still a problem, please contact your local dealer or GWInstek at
www.gwinstek.com.tw
/ marketing@goodwill.com.tw.
APPENDIX
Error Messages
Frequency
error
FrEq-Err2
FrEq-Err3
FrEq-Err1
Duty Cycle
error
duty-Err2
duty-Err3
duty-Err1
Sine and square wave frequency over range.
This message appears when entering sine or
square waveform frequency larger than the
rating. See page26 for sine/square rating.
Triangle wave Frequency over range. This
message appears when entering triangle
waveform frequency larger than 1MHz. See
page26 for triangle wave rating.
FM Center Frequency over range. This
message appears when trying to enter FM
center frequency larger than specified. See
page38 for FM center frequency range.
Not square waveform. This message
appears when trying to set duty cycle in
non-square (=sine or triangle) waveform.
For duty cycle setting, see page28 (square
wave) or page33 (TTL/CMOS output).
Square wave frequency over range. This
message appears when trying to set duty
cycle when the square wave frequency is
over 1MHz. For square wave frequency
setting, see page26.
Duty over range. This message appears
when the duty cycle setting goes outside
20~80% range.
For duty cycle range, see page28 (square
wave) or page33 (TTL/CMOS output).
51
52
APPENDIX
SFG-2000 Series User Manual
Specification
Output Function Sine, Square, Triangle
Amplitude Range
Impedance
Main
Freque ncy
Sine Wave
Tria n gle Wa ve
Square Wave
CMOS Output
TTL Output
Attenuator
DC Offset < −5V ~ >+5V (50Ω load)
Duty Range 20% ~ 80%, 2Hz~1MHz (Square Wave)
Duty Resolution 1% (Square Wave Only)
Display 9 digits LED display
Sine/Square
Waveform Range
Tr i an g l e
Waveform Range
Resolution 0.1Hz (1Hz for SFG-2020/2120)
Stability ±20ppm
Accuracy ±20ppm
Aging ±5ppm/year
Harmonic
Distortion
Flatness
Linearity
Symmetry ±1% of period + 4ns, 0.1Hz ~ 100kHz
Rise/Fall Time ≤ 25ns at maximum output (50Ω load)
Level 4 ± 1Vpp ~ 15 ± 1Vpp, adjustable
Rise/Fall Time ≤ 120ns
Level
Fan Out 20 TTL Load
10Vp-p (into 50Ω load)
50Ω ± 10%
−20dB ± 1dB x2
SFG-2004 0.1Hz ~ 4MHz
SFG-2007 0.1Hz ~ 7MHz
SFG-2010 0.1Hz ~ 10MHz
SFG-2020 1Hz ~ 20MHz
SFG-2104 0.1Hz ~ 4MHz
SFG-2107 0.1Hz ~ 7MHz
SFG-2110 0.1Hz ~ 10MHz
SFG-2120 1Hz ~ 20MHz
0.1Hz ~ 1MHz
(1Hz ~ 1MHz for SFG-2020/2120)
≥−55dBc, 0.1Hz ~ 200kHz
≥−40dBc, 0.2MHz ~ 4MHz
≥−30dBc, 4MHz ~ 20MHz
(Amplitude at maximum position
without attenuating 1/10 of any
combination setting, TTL/CMOS off)
< ± 0.3dB, 0.1Hz ~ 1MHz
< ± 0.5dB, 1MHz ~ 4MHz
< ± 2dB, 4MHz ~ 10MHz
< ± 3dB, 10MHz ~ 20MHz
(At the max amplitude relating to 1kHz)
≥ 98%, 0.1Hz ~ 100kHz
≥ 95%, 100kHz ~ 1MHz
≥ 3Vpp
Sweep
(SFG-2100
Series)
Amplitude
Modulation
(SFG-2100
Series)
Fre quency
Modulation
(SFG-2100
Series)
Fre quency
Counter
(SFG-2100
Series)
Store/Recall
Rise/Fall Time ≤ 25ns
Sweep Rate 100:1 Ratio Max, adjustable (Note1)
Sweep Time 1 ~ 30s, adjustable (Note2)
Sweep Mode Linear, Logarithmic
Depth 0 ~ 100%
Frequency 400Hz (internal), DC ~ 1MHz (external)
Carrier BW
External
Modulating
100Hz ~ 5MHz (−3dB)
Sensitivity: ≤ 10Vpp for 100%
modulation
Deviation ≥0 ~ ±50kHz, center at 1MHz
Freque ncy
External
Modulating
400Hz fixed (internal), 1kHz fixed
(external)
Sensitivity: ≤ 10Vpp for 10%
modulation (center at 1MHz)
Range 5Hz ~ 150MHz
Accuracy Time Base Accuracy ± 1 count
Time Base ±20ppm (23±5°C) after 30min warmup
Max. Resolution 100nHz for 1Hz, 0.1Hz for 100MHz
Input Impedance 1MΩ/150pf
Sensitivity
≤ 35mVrms, 5Hz ~ 100MHz
≤ 45mVrms, 100MHz ~ 150MHz
10 Groups of Setting Memories
Power Source
AC115V/230V +10%, −15%, 50/60Hz
Indoor Use, Altitude Up to 2000m
Operation
Environment
Ambient Temperature 0 ~ 40°C
Relative Humidity ≤ 80%, 0 ~ 40°C
Relative Humidity ≤ 70%, 35 ~ 40°C
Install Category II / Pollution Degree 2
General
Storage
Environment
Te mp e ra t u re : −10 ~ 70°C
Humidity: ≤70%
Instruction Manual x 1, Power Cord x 1
Accessories
GTL-101 x 2 (SFG-2100 Series)
GTL-101 x 1 (SFG-2000 Series)
Dimension 107 (W) x 266 (H) x 293 (D)
Wei ght
Note1: In order to get the maximum sweep span, sweep time needs to be tuned.
Note2: If sweep time is too long, the stop frequency will stay at the maximum
frequency until the end of the sweep cycle.
Approx. 3.2kg (SFG-2100 Series)
Approx. 3.1kg (SFG-2000 Series)
53
54
APPENDIX
Declaration of Conformity
We
GOOD WILL INSTRUMENT CO., LTD.
(1) No.7-1, Jhongsing Rd., Tucheng City, Taipei County, Taiwan
(2) No. 69, Lu San Road, Suzhou City (Xin Qu), Jiangsu Sheng, China
declare, that the below mentioned product
Type of Product: Synthesized Function Generator
Model Number: SFG-2004, SFG-2007, SFG-2010, SFG-2020,
SFG-2104, SFG-2107, SFG-2110, SFG-2120
are herewith confirmed to comply with the requirements set out in the
Council Directive on the Approximation of the Law of Member States
relating to Electromagnetic Compatibility (89/336/EEC, 92/31/EEC,
93/68/EEC) and Low Voltage Directive (73/23/EEC, 93/68/EEC).
For the evaluation regarding the Electromagnetic Compatibility and Low
Voltage Directive, the following standards were applied:
◎ EMC
EN 61326-1: Electrical equipment for measurement, control and laboratory
use –– EMC requirements (1997 + A1:1998 + A2:2001 + A3:2003)
Conducted Emission
Radiated Emission
EN 55011: Class A 1998 +
A1:1999 + A2:2002
Current Harmonics
EN 61000-3-2: 2000 + A2:2005
Voltage Fluctuations
EN 61000-3-3: 1995 + A1:2001
------------------------- Surge Immunity
------------------------- Conducted Susceptibility
------------------------- Power Frequency Magnetic Field
------------------------- Voltage Dip/ Interruption
◎ Safety
Low Voltage Equipment Directive 73/23/EEC & amended by 93/68/EEC
Safety Requirements
IEC/EN 61010-1: 2001
Electrostatic Discharge
EN 61000-4-2: 1995 + A1:1998 +
A2:2001
Radiated Immunity
EN 61000-4-3: 2002 + A1:2002
Electrical Fast Transients
EN 61000-4-4: 2004
EN 61000-4-5: 1995 + A1:2001
EN 61000-4-6: 1996 + A1:2001
EN 61000-4-8: 1993 + A1:2001
EN 61000-4-11: 2004
SFG-2000 Series User Manual
INDEX
2
20dB attenuation................................... 29
example setting ................................. 22
A
AM
example setting ................................. 23
setup .................................................. 37
amplifier application example .............. 46
application examples............................. 44
C
cleaning.................................................... 7
CMOS
activation........................................... 32
example setting ................................. 22
constant current circuit......................... 10
control knob overview ........................... 17
counter gate time................................... 40
counter input ......................................... 40
example setting ................................. 24
D
DDS block diagram ................................11
default panel setting
contents ............................................. 43
recall .................................................. 43
default setting
contents ............................................. 24
default setting recall ............................. 21
direct digital synthesis.......................... 10
display contents overview ..................... 14
duty cycle
example setting ................................. 22
setup .................................................. 28
duty cycle error ................................ 28, 52
faq ...................................................... 51
E
EN 61010 ....................................... 6, 7, 55
EN55011................................................. 55
EN61000 ................................................ 55
external modulation ........................ 37, 39
example setting ................................. 23
F
FAQ ........................................................ 51
FM
example setting ................................. 23
seup.................................................... 38
frequency
editing................................................ 27
entering.............................................. 26
frequency error .......................... 27, 39, 52
faq ...................................................... 51
front panel diagram
SFG-2000........................................... 13
SFG-2100........................................... 13
fuse
safety instruction................................. 6
I
impedance application example............ 48
in/out terminal overview ....................... 16
L
lin sweep selection................................. 35
log sweep selection................................. 35
logic application example ...................... 48
55
56
INDEX
M
main feature list.....................................12
memory recall
example setting..................................24
memory store
example setting..................................24
model lineup ...........................................12
N
numerical keys overview........................15
O
offset .......................................................30
example setting..................................22
operation environment
safety instruction ................................ 7
operation shortcuts.................................22
P
phase locked loop
example application ...........................44
power supply
safety instruction ................................ 6
power up sequence .................................21
FAQ.....................................................51
R
rear panel ...............................................19
recall setting...........................................42
S
safety
guidelines ............................................ 6
symbol.................................................. 5
UK power cord..................................... 8
setup step............................................... 20
sine wave
example setting ................................. 22
selection ............................................. 26
speaker application example........... 49, 50
specification ........................................... 53
FAQ.................................................... 51
square wave
duty cycle........................................... 28
example setting ................................. 22
selection ............................................. 26
storage environment
safety instruction ................................ 7
store setting ........................................... 42
sweep
example setting ................................. 23
setup .................................................. 35
T
table of contents....................................... 3
technical background............................. 10
tilt stand ................................................ 20
transistor application example ............. 45
triangle wave
example setting ................................. 22
selection ............................................. 26
troubleshooting application example.... 44
TTL
activation ........................................... 32
example setting ................................. 22
57
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