GW Instek AFG-2225 User manual

Arbitrary Function Generator
AFG-2225
User Manual
GW INSTEK PART NO.82RF-22250M01
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
3
Table of Contents
SAFETY INSTRUCTIONS..................................6
GETTING STARTED .......................................11
Main Features ...................................................................11
Panel Overview..................................................................13
Setting Up the function Generator.....................................19
QUICK REFERENCE .......................................21
How to use the Digital Inputs ...........................................23
How to use the Help Menu ...............................................25
Selecting a Waveform ........................................................27
Modulation........................................................................29
Sweep................................................................................34
Burst .................................................................................35
ARB ...................................................................................37
Utility Menu ......................................................................40
Frequency Counter.............................................................41
Coupling............................................................................42
Menu Tree .........................................................................44
Default Settings ................................................................52
OPERATION ..................................................54
Select a Waveform .............................................................55
MODULATION...............................................64
Amplitude Modulation (AM) .............................................66
Frequency Modulation (FM) ..............................................75
Frequency Shift Keying (FSK) Modulation..........................84
Phase Modulation (PM) ....................................................91
SUM modulation .............................................................100
Frequency Sweep .............................................................108

AFG-2225 User Manual
4
Burst Mode .....................................................................118
SECONDARY SYSTEM FUNCTION SETTINGS
.................................................................... 131
Save and Recall ...............................................................132
System and Settings ........................................................136
System and Settings ........................................................136
CHANNEL SETTINGS .................................. 143
ARBITRARY WAVEFORMS............................ 147
Inserting Built-In Waveforms ...........................................148
Display an Arbitrary Waveform ........................................150
Editing an Arbitrary Wavefrom .........................................159
Ouput an Arbitrary Waveform ..........................................169
Saving/Loading an Arbitrary Waveform ............................171
REMOTE INTERFACE................................... 180
Establishing a Remote Connection ..................................181
Command List .................................................................189
System Commands ..........................................................193
Status Register Commands..............................................196
System Remote Commands .............................................199
Apply Commands ............................................................200
Output Commands ..........................................................206
Pulse Configuration Commands ......................................216
Amplitude Modulation (AM) Commands .........................218
AM Overview ...................................................................218
Frequency Modulation (FM) Commands..........................223
FM Overview ...................................................................223
Frequency-Shift Keying (FSK) Commands ........................228
FSK Overview ..................................................................228
Phase Modulation (PM)Commands .................................232
PM Overview ...................................................................232

Table of Contents
5
SUM Modulation (SUM) Commands ..............................236
SUM Overview................................................................. 236
Frequency Sweep Commands ..........................................240
Sweep Overview ..............................................................240
Burst Mode Commands ...................................................249
Burst Mode Overview ......................................................249
Arbitrary Waveform Commands .......................................260
Arbitrary Waveform Overview ..........................................260
COUNTER .......................................................................266
PHASE.............................................................................267
COUPLE ..........................................................................268
Save and Recall Commands .............................................271
Error Messages ...............................................................273
SCPI Status Register........................................................287
APPDENIX ................................................... 293
AFG-2225 Specifications..................................................293
EC Declaration of Conformity ..........................................298
INDEX ......................................................... 299

AFG-2225 User Manual
6
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.
WARNING
Warning: Identifies conditions or practices that
could result in injury or loss of life.
CAUTION
Caution: Identifies conditions or practices that
could result in damage to the function generator or
to other objects or property.
DANGER High Voltage
Attention: Refer to the Manual
Protective Conductor Terminal
Earth (Ground) Terminal
DANGER Hot Surface

SAFETY INSTRUCTIONS
7
Double Insulated
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.
Safety Guidelines
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
AFG-2225 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.
Power Supply
WARNING
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.

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8
Fuse
WARNING
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.
Operation
Environment
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

SAFETY INSTRUCTIONS
9
(Pollution Degree) EN 61010-1:2010specifies 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,
precipitation, and full wind pressure, but neither temperature
nor humidity is controlled.
Storage
environment
Location: Indoor
Relative Humidity: < 70%
Temperature: -10°C to 70°C
Disposal
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.

AFG-2225 User Manual
10
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:
Green/ Yellow:
Earth
Blue:
Neutral
Brown:
Live (Phase)
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 0.75mm2should 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.

GETTING STARTED
11
GETTING STARTED
The Getting started chapter introduces the
function generator’s main features, appearance, set
up procedure and power-up.
Main Features
Model name
Frequency bandwidth
AFG-2225
25MHz
Performance
DDS Function Generator series
1μHz high frequency resolution maintained at
full range
20ppm frequency stability
Arbitrary Waveform Capability
120 MSa/s sample rate
60 MSa/s repetition rate
4k-point waveform length
10 groups of 4k waveform memories
True waveform output to display
User-defined output section
DWR (Direct Waveform Reconstruction)
capability
Waveform editing via PC
Features
Sine, Square, Ramp, Pulse, Noise, standard
waveforms
Internal and external LIN/LOG sweep with
marker output

AFG-2225 User Manual
12
Int/Ext AM, FM, PM, FSK, SUM modulation
Burst function with internal and external
triggers without marker output
Store/recall 10 groups of setting memories
Output overload protection
Interface
USB interface as standard
3.5 inch Color TFT LCD (320 X 240) graphical
user interface
AWES (Arbitrary Waveform Editing Software)
PC software

GETTING STARTED
13
Panel Overview
Front Panel










turn

 


/
  
    


AFG-2225

LCD Display Function keys,
Return key
Scroll Wheel Output
Terminals
Number pad Power
switch
Output key
Channel
select key
Arrow keys
Operation keys
LCD Display
TFT color display, 320 x 240 resolution.
Function Keys
F1~F5

Activates functions which appear
on the right-hand side of the LCD
display.
Return Key
turn
Goes back to the previous menu
level.
Operation Keys

The waveform key is used to select
a type of waveform.
/
The FREQ/Rate key is used to set
the frequency or sample rate.

AMPL sets the waveform
amplitude.

Sets the DC offset.

AFG-2225 User Manual
14

The UTIL key is used to access the
save and recall options, update and
view the firmware version, access
the calibration options, output
impedance settings and frequency
meter.

ARB is used to set the arbitrary
waveform parameters.



The MOD, Sweep and Burst keys
are used to set the modulation,
sweep and burst settings and
parameters.
Preset Key

The preset key is used to recall a
preset state.
Output Key

The Output key is used to turn on
or off the waveform output.
Channel Select
Key

The channel select key is used to
switch between the two output
channels.
Output ports

Ω
Ω


CH1: Channel 1 output port
CH2: Channel 2 output port
Power Button
Turns the power on or off.
Arrow Keys
Used to select digits when editing
parameters.

GETTING STARTED
15
Scroll Wheel
The scroll wheel is used to edit
values and parameters.
Decrease Increase
Keypad
/


 



The digital keypad is used to enter
values and parameters. The keypad
is often used in conjunction with
the arrow keys and variable knob.

AFG-2225 User Manual
16
Rear Panel


z


rr
ountr
rr


ost
v
USB Host port Trigger output
Input Terminals
USB Device port
FanPower socket input
Trigger Input
IN
OUT
Trigger
Counter
Trigger
MOD
External trigger input. Used to
receive external trigger signals.
Trigger Output
IN
OUT
Trigger
Counter
Trigger
MOD
Marker output signal. Used for
Sweep and ARB mode only.
Fan
Fan.
Power Input
Socket
AC 100-240V
50-60Hz 25W MAX
Power input: 100~240V AC
50~60Hz.

GETTING STARTED
17
USB Host
Host
USB type-A host port.
USB Device
Port
Device
USB type-B device port is used to
connect the function generator to a
PC for remote control.
Counter Input
IN
OUT
Trigger
Counter
Trigger
MOD
Frequency counter input.
MOD Input
IN
OUT
Trigger
Counter
Trigger
MOD
Modulation input terminal.

AFG-2225 User Manual
18
Display
Soft Menu
Keys
Status Tabs
Parameter
Windows
Waveform
Display
Parameter
Windows
The Parameter display and edit window.
Status Tabs
Displays the current channel and setting status.
Waveform Display
Used to display the waveform
Soft Menu Keys
The function keys (F1~F5) beside the Soft Menu
keys correspond to the soft keys.

GETTING STARTED
19
Setting Up the function Generator
Background
This section describes how to adjust the handle
and power up the function generator.
Adjusting the
Handle
Pull out the handle
sideways and rotate
it.










turn

 


/
  
    


AFG-2225

Place the AFG-2225
horizontally,
Or tilt the stand.
Place the handle
vertically to hand
carry.

AFG-2225 User Manual
20
Power Up
1. Connect the power cord to
the socket on the rear panel.
2. Turn on the power switch
on the front panel.
3. When the power switch is turned on the screen
displays the loading screen.
The function generator is now ready to be used.