
Arbitrary Function Generator
GW INSTEK PART NO. 82AF-21200MC1
ISO-9001 CERTIFIED MANUFACTURER

This manual contains proprietary information, which is protected by
copyright. 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 Corporation.
The information in this manual was correct at the time of printing.
However, Good Will continues to improve its products and therefore
reserves the right to change the specifications, equipment, and
maintenance procedures at any time without notice.
Good Will Instrument Co., Ltd.
No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan.

TABLE OF CONTENTS
Table of Contents
SAFETY INSTRUCTIONS .................................. 2
GETTING STARTED ......................................... 6
Main Features ..................................................................... 6
Panel Overview .................................................................... 8
Selecting a Waveform ........................................................ 14
ARB ................................................................................... 15
Modulation ........................................................................ 15
Sweep (2100 series only) ................................................... 17
Counter (2100 series only) ................................................ 17
Save/Recall ........................................................................ 18
AFG-2000 Series Specifications ......................................... 19
EC Declaration of Conformity ............................................ 23
1

AFG-2000 Quick Start Guide
Warning: Identifies conditions or practices that
could result in injury or loss of life.
Caution: Identifies conditions or practices that
could result in damage to the function generator or
to other objects or property.
Attention: Refer to the Manual
Protective Conductor Terminal
Earth (Ground) Terminal
DANGER Hot Surface
SAFETY INSTRUCTIONS
This chapter contains important safety instructions
that should be followed when operating and
storing the function generator. Read the following
before any operation to ensure your safety and to
keep the function generator in the best condition.
Safety Symbols
These safety symbols may appear in this manual or on the
instrument.
2

SAFETY INSTRUCTIONS
Do not dispose electronic equipment as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased.
General
Guideline
CAUTION
Do not place heavy objects on the instrument.
Do not place flammable objects on the
instrument.
Avoid severe impact or rough handling that
may damage the function generator.
Avoid discharges of static electricity on or near
the function generator.
Use only mating connectors, not bare wires, for
the terminals.
The instrument should only be disassembled by
a qualified technician.
(Measurement categories) EN 61010-1:2010 specifies the
measurement categories and their requirements as follows. The
instrument falls under category II.
Measurement category IV is for measurement performed at the
source of a low-voltage installation.
Measurement category III is for measurement performed in a
building installation.
Measurement category II is for measurement performed on
circuits directly connected to a low voltage installation.
Measurement category I is for measurements performed on
circuits not directly connected to Mains.
AC Input voltage: 100 ~ 240V AC, 50 ~ 60Hz.
Connect the protective grounding conductor of
the AC power cord to an earth ground to
prevent electric shock.
Safety Guidelines
3

AFG-2000 Quick Start Guide
Fuse type: F1A/250V.
Only qualified technicians should replace the
fuse.
To ensure fire protection, replace the fuse only
with the specified type and rating.
Disconnect the power cord and all test leads
before replacing the fuse.
Make sure the cause of fuse blowout is fixed
before replacing the fuse.
Cleaning the
function
generator
Disconnect the power cord before cleaning the
function generator.
Use a soft cloth dampened in a solution of mild
detergent and water. Do not spray any liquid
into the function generator.
Do not use chemicals containing harsh products
such as benzene, toluene, xylene, and acetone.
Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (Note below)
and avoid strong magnetic fields.
Relative Humidity: < 80%
Altitude: < 2000m
Temperature: 0°C to 40°C
(Pollution Degree) EN 61010-1:2010 specifies pollution degrees and
their requirements as follows. The function generator 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,
4

SAFETY INSTRUCTIONS
precipitation, and full wind pressure, but neither temperature
nor humidity is controlled.
Location: Indoor
Relative Humidity: < 70%
Temperature: -10°C to 70°C
Do not dispose this instrument as unsorted
municipal waste. Please use a separate collection
facility or contact the supplier from which this
instrument was purchased. Please make sure
discarded electrical waste is properly recycled to
reduce environmental impact.
Power cord for the United Kingdom
When using the function generator 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:
As the colours of the wires in main leads may not correspond with the coloured
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 either the letter E, the earth symbol or coloured Green/Green &
Yellow.
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, a 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 exposed wiring from a cable, plug or connection that is engaged in a live socket
is extremely hazardous. If a cable or plug is deemed hazardous, turn off the mains
power and remove the cable, any fuses and fuse assemblies. All hazardous wiring
must be immediately destroyed and replaced in accordance to the above standard.
5

AFG-2000 Quick Start Guide
Sine, Square, Ramp, Noise, ARB
0.1Hz~20MHz
1 mVpp to 10 Vpp( into 50Ω)
2 mVpp to 20 Vpp(open-circuit)
20MHzHz~25MHz
1 mVpp to 5 Vpp( into 50Ω)
2 mVpp to 10 Vpp(open-circuit)
GETTING STARTED
The Getting started chapter introduces the
function generator’s main features, appearance
and introduces a quick instructional summary of
some of the basic functions. For comprehensive
operation instructions, please see the user manual.
Main Features
6

GETTING STARTED
DDS technology using an FPGA provides high
resolution waveforms
25MHz DDS (Direct Digital Synthesis) signal
output series
0.1Hz resolution
Full Function Arbitrary Waveform Capability
20 MSa/s sample rate
10 MHz repetition rate
4 k-point waveform length
10-bit amplitude resolution
Ten 4k waveform memories
Sine, Square, Ramp, Noise
Int/Ext AM, FM, FSK modulation
Modulation/sweep signal output
Save/recall 10 groups of setting memories
Output overload protection
ARB (Arbitrary Waveform) can be edited with
PC software
USB interface as standard
3.5 inch LCD
7

AFG-2000 Quick Start Guide
ARB
OUTPUT
50
W
50
W
SYNC
MAIN
OUTPUT
POWER
Save/Recall INT/EXT Hop LIN/LOG
Shape DEP/DEV Rate Start/Stop Gate
FUNC
FREQ
AMPL
OFST
DUTY
Point
Value
0
7 8 9
4 5 6
1 2 3
/
Hz/Vpp kHz/Vrms MHz/dBm % Shift
AM FM FSK Sweep Count
OUTPUT
Enter
Arbitrary Function Generator
AFG-2125
LCD Display Number
pad
Scroll Wheel
MAIN
output port
ARB keys Power
button
Output
control key
Enter key
Arrow keys SYNC output port
Operation
keys
Function keys
High-Z/50Ω
ARB
OUTPUT
50
W
50
W
SYNC
MAIN
OUTPUT
POWER
Save/Recall
FUNC
FREQ
AMPL
OFST
DUTY
Point
Value
0
7 8 9
4 5 6
1 2 3
/
Hz/Vpp kHz/Vrms MHz/dBm % Shift
OUTPUT
Enter
Arbitrary Function Generator
AFG-2025
LCD Display Number
pad
Scroll Wheel
MAIN
output port
ARB keys Power
button
Output
control key
Enter key
Arrow keys SYNC output port
Operation
keys
Function keys
High-Z/50Ω
Panel Overview
AFG-2105/2112/2125 Front Panel
AFG-2005/2012/2025 Front Panel
8

GETTING STARTED
3.5 inch, 3 color LCD display.
The digital keypad is used to
enter values and parameters. The
keypad is often used in
conjunction with the selection
keys and variable knob.
The scroll wheel is used to edit
values and parameters in steps of
1 digit. Used in conjunction with
the arrow keys.
Decrease Increase
Used to select digits when editing
parameters.
OUTPUT
50
W
50
W
SYNC
MAIN
OUTPUT
SYNC output port (50Ω
impedance).
Main output port (50Ω
impedance).
Used to confirm input values.
Turns the instrument power
on/off.
Toggles the output impedance
between 50Ω and High-Z.
9

Saves or recalls waveforms from
memory.
Selects kHz or Vrms units.
Sets the source to internal or
external for the modulation and
FSK functions*.
Selects MHz or dBm units.
Sets the “Hop” frequency for FSK
modulation*.
Sets the sweep to linear or
logarithmic*.
The shift key is used to select the
secondary functions on the
operation keys.
The AM key is used to turn AM
modulation on/off*.
Selects the modulation
waveform*.
The FM key is used to turn FM
modulation on/off*.
Selects the modulation depth or
the frequency deviation*.
Sets the AM, FM, FSK modulation
and sweep function (Rate)*
AFG-2000 Quick Start Guide
10

GETTING STARTED
Selects the Sweep function*.
Sets the Start or Stop frequency*.
Turns the frequency counter
on/off*.
Sets the frequency counter gate
time*.
Arbitrary waveform editing keys.
The point key sets the ARB point
numbers.
The Value key sets the amplitude
value of the selected point.
The FUNC key is used to select
the output waveform type,
Sine, Square, Ramp, Noise, ARB.
Sets the frequency of the selected
waveform.
Sets the amplitude of the selected
waveform.
The OFST sets the DC offset for
the selected waveform.
The DUTY key sets the duty cycle
of square and ramp waveforms.
*indicates functions/features for the AFG-2105/2112/2125 only.
11

AFG-2000 Quick Start Guide
NO OPERATOR SERVICEABLE COMPONENTS INSIDE.
DO NOT REMOVE COVERS. REFER SERVICING TO
TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE
GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND.
WARNING
QUALIFIED PERSONNEL.
SER.NO. LABEL
AC 100-240V
50-60Hz 25VA
OUTPUT INPUT
MOD Counter
Trigger MOD
MOD input
Trigger input
MOD output
Type B USB portPower socket
Counter input
NO OPERATOR SERVICEABLE COMPONENTS INSIDE.
DO NOT REMOVE COVERS. REFER SERVICING TO
TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE
GROUNDING CONDUCTOR MUST BE CONNECTED TO GROUND.
WARNING
QUALIFIED PERSONNEL.
SER.NO. LABEL
AC 100-240V
50-60Hz 25VA
Type B USB portPower socket
OUTPUT INPUT
MOD Counter
Trigger MOD
The type B USB port is used to
connect the function generator to a
PC for remote control.
Power input: 100~240V AC
50~60Hz.
AFG-2105/2112/2125 Rear Panel
AFG-2005/2012/2025 Rear Panel
12

Display
Waveform type
Counter settings
USB icon
Frequency display
Secondary parameter
display
Modulation, sweep,
counter menu
Press the function key to cycle through different
output waveforms.
Gate time counter settings*.
Shows the USB interface status.
Displays the main waveform frequency settings.
Secondary
parameter display
Displays secondary waveform parameters and
settings.
Modulation,
sweep, counter
menu
Displays the modulation, sweep and counter
functions as well as the modulating waveform and
source*.
*indicates functions/features for the AFG-2105/2112/2125 only.
GETTING STARTED
13

AFG-2000 Quick Start Guide
Example: Sine Wave, 10kHz, 1Vpp, 2Vdc
1. Press FUNC>select the sine wave
Example: Square Wave, 10kHz, 3Vpp, 75% duty cycle
1. Press FUNC>select the square wave
Example: Ramp Wave, 10kHz, 3Vpp, 25% symmetry
1. Press FUNC>select the ramp wave
Selecting a Waveform
Sine Wave
Square Wave
Ramp Wave
14

GETTING STARTED
Example: ARB Ramp, 10 kHz, 1Vpp, 2 points.
1. Press FUNC>select the ARB wave
5. Press Value>5>1>1>Enter. (+511 amplitude)
7. Press Value>+/->5>1>1>Enter. (-511
amplitude)
Example: AM modulation. 100Hz modulating square wave. 1 Vpp,
1kHz Sine wave carrier. 70% modulation depth. Internal source
signal.
1. Press FUNC>select the sine wave
5. Press Shift>INT/EXT>select INT source
6. Press Shift>Shape>select the square wave
7. Press Shift>Rate>1>0>0>Hz
8. Press Shift>DEP/DEV>7>0>%
10. Press AM to deselect the AM function
ARB
ARB – Enter Points
Modulation
AM (2100 series only)
15

AFG-2000 Quick Start Guide
Example: FM modulation. 100Hz modulating square wave. 1Vpp,
1kHz Sine wave carrier. 100 Hz frequency deviation. Internal
Source.
1. Press FUNC>select the sine wave
5. Press Shift>INT/EXT>select INT
6. Press Shift>Shape>select square
7. Press Shift>Rate>1>0>0>Hz
8. Press Shift>DEP/DEV>1>0>0>Hz
10. Press FM to deselect the FM function
Example: FSK modulation. 100Hz Hop frequency. 1Vpp, 1kHz
Ramp carrier wave. 10 Hz Rate (modulation frequency). Internal
Source.
1. Press FUNC>select the ramp wave
5. Press Shift>INT/EXT>Select INT
6. Press Shift>Rate>1>0>Hz
7. Press Shift>HOP>1>0>0>Hz
9. Press FSK to deselect the FSK function
FM (2100 series only)
FSK Modulation (2100 series only)
16

GETTING STARTED
Example: Frequency Sweep. Start Frequency 1Hz, Stop Frequency
1MHz. 1Hz Rate. 1Vpp. Lins Sweep.
1. Press FUNC>select the ramp wave
4. Press Shift>INT/EXT>select INT
5. Press Shift>Start/Stop>select Start>1>Hz
6. Press Shift>Start/Stop>select Stop>1>MHz
8. Press Shift>LIN/LOG>Select LINS
10. Press Sweep to deselect the sweep function
Example: Frequency counter function, gate time 1s.
OUTPUT INPUT
MOD Counter
MOD
Trigger
2. Press Shift>Gate>select 1S gate time
3. Connect the signal to the counter input
terminal.
4. Press Count to deselect the counter function.
Sweep (2100 series only)
Counter (2100 series only)
17

AFG-2000 Quick Start Guide
Example: Save waveform to memory.
1. Press Shift>Save/Recall>Select Save
2. Turn the Scroll knob>select a file
number>Enter
Example: Recall waveform from memory.
1. Press Shift>Save/Recall>Select Recall
2. Turn the Scroll knob>select a file
number>Enter
Save/Recall
Save
Recall
18

GETTING STARTED
Sine, Square, Ramp, Noise, ARB
Frequency Characteristics
1 mVpp to 10 Vpp( into 50Ω)
2 mVpp to 20 Vpp(open-circuit)
1 mVpp to 5 Vpp( into 50Ω) for 20MHz-
25MHz
2 mVpp to 10 Vpp(open-circuit) for
20MHz-25MHz
± 2% of setting ±1 mVpp
(at 1 kHz)
± 1% (0.1dB) ≤100kHz
± 3% (0.3 dB) ≤5MHz
± 5% (0.4 dB) ≤12MHz
±20%(2dB)≤20MHz
± 5% (0.4 dB) ≤25MHz
(sine wave relative to 1 kHz)
AFG-2000 Series Specifications
The specifications apply when the function generator is powered on
for at least 30 minutes under +20°C~+30°C.
19

AFG-2000 Quick Start Guide
±5 Vpk ac +dc (into 50Ω)
±10Vpk ac +dc (Open circuit)
±2.5 Vpk ac +dc (into 50Ω) for 20MHz-
25MHz
±5Vpk ac +dc (Open circuit) for 20MHz-
25MHz
2% of setting + 5 mV+ 0.5% of amplitude
50Ω typical (fixed)
> 300kΩ (output disabled)
Short-circuit protected
Overload relay automatically disables
main output
Sine wave Characteristics
–55 dBc DC ~ 200kHz, Ampl > 0.1Vpp
–50 dBc 200kHz ~ 1MHz, Ampl > 0.1Vpp
–35 dBc 1MHz ~ 5MHz, Ampl > 0.1Vpp
–30 dBc 5MHz ~ 25MHz, Ampl > 0.1Vpp
Square wave Characteristics
≤25ns at maximum output.
(into 50 Ω load)
1.0% to 99.0% ≤100kHz
20.0% to 80.0% ≤ 5MHz
40.0% to 60.0% ≤ 10MHz
50% ≤ 25MHz
0% to 100% (0.1% Resolution)
20

AFG-2000 Quick Start Guide
±20ppm (23˚C
±5˚C) after 30
minutes warm up
The maximum
resolution is:
100nHz for 1Hz,
0.1Hz for 100MHz.
35mVrms ~ 30Vms
(5Hz to 150MHz)
10 Groups of Setting Memories
(Locations 0~9 only for instrument state,
Locations 10~19 only for ARB data)
Temperature to satisfy the specification :
18 ~ 28˚C
Operating temperature :
0 ~ 40˚C
Relative Humidity:
≤ 80%, 0 ~ 40˚C
≤ 70%, 35 ~ 40˚C
Installation category: CAT Ⅱ
266(W) x 107(H) x 293(D) mm
Quick Start Guide ×1
CD (user manual + software) ×1
Power cord×1
22

GETTING STARTED
GOOD WILL INSTRUMENT CO., LTD.
No.7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan
GOOD WILL INSTRUMENT (SUZHOU) CO., LTD.
No. 69, Lushan Road, Suzhou New District Jiangsu, China
declares that the below mentioned product
AFG-2005, AFG-2105, AFG-2012, AFG-2112, AFG-2025, AFG-2125
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 (2004/108/EC) and Low
Voltage Equipment Directive (2006/95/EC). For the evaluation
regarding the Electromagnetic Compatibility and Low Voltage
Equipment Directive, the following standards were applied:
Electrical equipment for measurement, control and
laboratory use –– EMC requirements (2006)
Conducted and Radiated Emissions
EN 55011: 2009+A1:2010
Electrostatic Discharge
EN 61000-4-2: 2008
Current Harmonic
EN 61000-3-2: 2006+A2:2009
Radiated Immunity
EN 61000-4-3: 2006+ A2:2010
Voltage Fluctuation
EN 61000-3-3: 2008
Electrical Fast Transients
EN 61000-4-4: 2004+A1:2010
-------------------------
Surge Immunity
EN 61000-4-5: 2005
-------------------------
Conducted Susceptibility
EN 61000-4-6: 2008
-------------------------
Power Frequency Magnetic Field
EN 61000-4-8: 2009
-------------------------
Voltage Dips/ Interrupts
EN 61000-4-11: 2004
Low Voltage Equipment Directive 2006/95/EC
Safety Requirements
EN 61010-1: 2010
EC Declaration of Conformity
23