Digital Storage Oscilloscope
GDS-2000A Series
USER MANUAL
GW INSTEK PART NO. 82DS-2304AEC1
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 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.
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 ................................................... 5
GETTING STARTED ......................................................... 10
GDS-2000A Series Overview................. 11
Appearance .......................................... 16
Set Up .................................................. 29
QUICK REFERENCE ......................................................... 41
Menu Tree / Operation Shortcuts ........ 43
Default Settings ................................... 61
Built-in Help ........................................ 63
MEASUREMENT .............................................................. 64
Basic Measurement ............................. 65
Automatic Measurement ...................... 72
Cursor Measurement ........................... 85
Math Operation ................................... 93
CONFIGURATION .......................................................... 101
Acquisition ........................................ 103
Segmented Memory Acquisition Overview
.......................................................... 111
Display............................................... 124
Horizontal View ................................. 130
Vertical View (Channel) ...................... 137
Trigger ............................................... 144
Search ................................................ 163
System Info / Language / Clock ......... 168
OPTIONAL SOFTWARE and APPS. ................................. 174
Applications ....................................... 175
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GDS-2000A Series User Manual
Optional Software .............................. 182
SAVE/RECALL ................................................................ 185
File Format/Utility ............................. 186
Create/Edit Labels .............................. 191
Save ................................................... 195
Recall ................................................. 202
Reference Waveforms ......................... 209
FILE UTILITIES ............................................................... 211
HARDCOPY KEY ............................................................. 218
REMOTE CONTROL CONFIG ......................................... 222
Interface Configuration ...................... 223
Web Server ......................................... 238
MAINTENANCE ............................................................. 241
FAQ ............................................................................... 246
APPENDIX ..................................................................... 249
GDS-2000A Specifications .................. 249
Probe Specifications .......................... 254
GDS-2000A Dimensions ..................... 256
Declaration of Conformity .................. 257
INDEX ............................................................................ 258
4
SAFETY INSTRUCTIONS
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 GDS-2000A or to
other properties.
DANGER High Voltage
Attention Refer to the Manual
Protective Conductor Terminal
Earth (ground) Terminal
SAFETY INSTRUCTIONS
This chapter contains important safety
instructions that you must follow during
operation and storage. Read the following before
any operation to insure your safety and to keep
the instrument in the best possible condition.
Safety Symbols
These safety symbols may appear in this manual or on the GDS2000A.
5
GDS-2000A Series User Manual
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
Make sure the BNC input voltage does not
exceed 300V peak.
Never connect a hazardous live voltage to the
ground side of the BNC connectors. It might
lead to fire and electric shock.
Do not place any heavy object on the GDS-
2000A.
Avoid severe impact or rough handling that
leads to damaging the GDS-2000A.
Do not discharge static electricity to the GDS-
2000A.
Use only mating connectors, not bare wires, for
the terminals.
Do not block the cooling fan opening.
Do not perform measurement at a power source
or building installation site (Note below).
Do not disassemble the GDS-2000A unless you
are qualified.
(Measurement categories) EN 61010-1:2010 specifies the
measurement categories and their requirements as follows. The
GDS-2000A falls under category I.
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.
Measurement category I is for measurements performed on
circuits not directly connected to Mains.
Safety Guidelines
6
SAFETY INSTRUCTIONS
Power Supply
WARNING
AC Input voltage: 100 ~ 240V AC, 48 ~ 63Hz,
auto selection. Power consumption: 96VA.
Connect the protective grounding conductor of
the AC power cord to an earth ground, to avoid
electrical shock.
Cleaning the
GDS-2000A
Disconnect the power cord before cleaning.
Use a soft cloth dampened in a solution of mild
detergent and water. Do not spray any liquid.
Do not use chemicals containing harsh materials
such as benzene, toluene, xylene, and acetone.
Operation
Environment
Location: Indoor, no direct sunlight, dust free,
almost non-conductive pollution (Note below)
Relative Humidity: < 80%
Altitude: < 2000m
Temperature: 0°C to 50°C
(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees
and their requirements as follows. The GDS-2000A 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
Temperature: -10°C to 60°C
40°C /93% RH 41°C ~60°C /65% RH
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GDS-2000A Series User Manual
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.
8
SAFETY INSTRUCTIONS
Green/ Yellow:
Earth
Blue:
Neutral
Brown:
Live (Phase)
Power cord for the United Kingdom
When using the oscilloscope 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.
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GDS-2000A Series User Manual
GDS-2000A Series Overview ............................................ 11
Series lineup .......................................................................... 11
Main Features ....................................................................... 12
Accessories ............................................................................ 13
Package Contents ................................................................. 15
Appearance ..................................................................... 16
GDS-2074A/2104A/2204A/2304A Front Panel ........... 16
GDS-2072A/2102A/2202A/2302A Front Panel ........... 17
Rear Panel ............................................................................. 24
Display ................................................................................... 26
Set Up ............................................................................. 29
Tilt Stand ............................................................................... 29
Module Installation .............................................................. 30
Software Installation ............................................................ 31
Power Up .............................................................................. 32
First Time Use ...................................................................... 33
How to Use This Manual .................................................... 35
GETTING STARTED
This chapter describes the GDS-2000A in a
nutshell, including its main features and front /
rear panel introduction. After going through the
overview, follow the Set Up section to properly
set up the oscilloscope for first time use. The Set
Up section also includes a starter on how to use
this manual effectively.
10
GETTING STARTED
Model name
Frequency
bandwidth
Input channels
Real-time
Sampling Rate
GDS-2072A
70MHz
2
2GSa/s
GDS-2102A
100MHz
2
2GSa/s
GDS-2202A
200MHz
2
2GSa/s
GDS-2302A
300MHz
2
2GSa/s
GDS-2074A
70MHz
4
2GSa/s
GDS-2104A
100MHz
4
2GSa/s
GDS-2204A
200MHz
4
2GSa/s
GDS-2304A
300MHz
4
2GSa/s
GDS-2000A Series Overview
Series lineup
The GDS-2000A series consists of 8 models, divided into 2-channel
and 4-channel versions.
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GDS-2000A Series User Manual
Features
8 inch TFT SVGA display.
MSO and DSO models available from 70MHz to
300MHz.
All models feature a real-time sampling rate of
2GSa/s and an equivalent time sampling rate of
100GSa/s.
Deep memory: 2M points record length.
Waveform capture rate of 80,000 waveforms per
second.
Vertical sensitivity: 1mV/div~10V/div.
Logic Analyzer module (optional): Adds 8 or 16
channel digital inputs and serial bus (I2C, SPI,
UART) and parallel bus triggering.
DDS Function Generator module (optional).
Segmented Memory: Optimizes the acquisition
memory to selectively capture only the
important signal details. Up to 2048 successive
waveform segments can be captured with a
time-tag resolution of 8ns. Segmented memory
can be used for both analog and digital
channels.
Enhanced Search: Allows the scope to search for
a number of different signal events.
On-screen Help.
64 MB internal flash disk.
Main Features
12
Interface
USB host port: front and rear panel, for storage
devices.
USB device port: rear panel, for remote control
or printing.
Demo output
GPIB (optional)
RS232 port.
Calibration output
SVGA output and Ethernet port (optional)
Accessories
Standard
Accessories
Part number
Description
82DS-2304AM01
Quick Start Guide
N/A region dependent
Power cord
GTP-070A-4, for
GDS-2072A/GDS-2074A
Passive probe; 70 MHz
GTP-150A-2, for
GDS-2102A/GDS-2104A
Passive probe; 150 MHz
GTP-250A-2 for,
GDS-2202A/GDS-2204A
Passive probe; 250 MHz
GTP-350A-2 for,
GDS-2302A/GDS-2304A
Passive probe; 350 MHz
Options
Option
Number
Description
DS2-LAN
Ethernet & SVGA output
DS2-GPIB
GPIB Interface
DS2-FGN
DDS Function Generator
DS2-8LA
8-Channel Logic Analyzer card
(GLA-08)with 8-Channel Logic
Analyzer Probe (GTL-08LA)
GETTING STARTED
13
GDS-2000A Series User Manual
DS2-16LA
16-Channel Logic Analyzer card
(GLA-16)with 16-Channel Logic
Analyzer Probe (GTL-16A)
Optional
Accessories
Part number
Description
GTC-001
Instrument cart, 470(W)x430(D)mm
(U.S. type input socket)
GTC-002
Instrument cart, 330(W)x430(D)mm
(U.S. type input socket)
GTL-110
test lead, BNC to BNC heads
GTL-232
RS-232C cable, 9-pin Female to 9-pin
female, Null modem for computer
GTL-242
USB cable, USB2.0A-B type cable 4P
GTL-08LA
8-Channel Logic Analyzer Testing
Probe
GTL-16LA
16-Channel Logic Analyzer Testing
Probe
GLA-08
8-Channel Logic Analyzer Card
GLA-16
16-Channel Logic Analyzer Card
GTP-070A-4
Passive probe; 70 MHz
GTP-150A-2
Passive probe; 150 MHz
GTP-250A-2
Passive probe; 250 MHz
GTP-350A-2
Passive probe; 350 MHz
Drivers
USB driver
LabVIEW driver
14
GETTING STARTED
Opening the Box
Contents
Main unit
Probe set
GTP-070A-4 for GDS-2072A/ GDS-2074A
GTP-150A-2 for GDS-2102A / GDS-2104A
GTP-250A-2 for GDS-2202A / GDS-2204A
GTP-350A-2 for GDS-2302A / GDS-2304A
Power cord
Certificate of Traceable Calibration
User Manual CD
Quick Start Guide
Note
The programming manual and USB driver are
downloadable from the GW Instek website. Visit
www.gwinstek.com, in the oscilloscope section.
Package Contents
Check the contents before using the GDS-2000A.
15
GDS-2000A Series User Manual
POWER
CH1 CH2
POSITION
TIME/DIV
POSITION
POSITION
VOLTS/DIV VOLTS/DIV
Autoset
Menu
50 %
Force-Trig
Select
TRIGGER
HORIZONTAL
VARIABLE
Measure Cursor
Display Help Save/Recall Utility
Acquire
Single
Run/Stop
Search
Set/Clear
CH3 CH4
POSITION
POSITION
VOLTS/DIV VOLTS/DIV
VERTICAL
M
R
B
Test
CH1 CH2 CH3 CH4 EXT TRIG
CAT
MW16pF
300Vpk MAX.
1
CAT
MW16pF
300Vpk MAX.
Hardcopy
Option
Menu Off
LEVEL
Zoom
MATH
REF
Demo
Logic Analyzer
1
BUS
Digital Storage Oscilloscope
GDS-2204A
200 MHz 2 GS/s
Visual Persistence Oscilloscope
GEN 1 GEN 2
Default
LCD
Variable knob
and Select key
Autoset, Run/Stop, Single
and Default settings
CH1~CH4
input
Trigger
controls
Function
keys
USB Host port,
Demo and Ground
terminals
Function
Generator
output 1&2
Power
button
Hardcopy key
Option key
Math,
Reference and
Bus keys
Bottom
menu keys
Horizontal
controls
Menu key
Vertical
controls
Logic
Analyzer
input
EXT
trigger
Side menu keys
Appearance
GDS-2074A/2104A/2204A/2304A Front Panel
16
GETTING STARTED
CH1 CH2
POSITION
TIME/DIV
POSITION
POSITION
VOLTS/DIV VOLTS/DIV
Autoset
Menu
50 %
Force-Trig
Select
TRIGGER
HORIZONTAL
VARIABLE
Measure Cursor
Display Help Save/Recall Utility
Acquire
Single
Run/Stop
LEVEL
Search
Set/Clear
VERTICAL
Test
POWER
2V
Hardcopy
Option
Menu Off
Zoom
CAT
M 16pF
300Vpk MAX.
1
CAT
MW16pF
300Vpk MAX.
1
M
R
B
MATH
REF
BUS
Default
Logic Analyzer
GEN 1 GEN 2
CH1 CH2 EXT TRIG
Digital Storage Oscilloscope
GDS-2202A
200 MHz 2 GS/s
Visual Persistence Oscilloscope
W
LCD
Variable knob
and Select key
Autoset, Run/Stop, Single
and Default settings
Math,
Reference and
Bus keys
Trigger
controls
Function
keys
USB Host port,
Demo and Ground
terminals
Function
Generator
output 1&2
Power
button
Hardcopy key
Option key
CH1~CH2
input
Bottom
menu keys
Horizontal
controls
Menu key
Vertical
controls
Logic
Analyzer
input
EXT
trigger
Side menu keys
LCD Display
8” SVGA TFT color LCD. 800 x 600 resolution,
wide angle view display.
Menu Off Key
Menu Off
Use the Menu Off key to hide the
onscreen menu system.
Option Key
Option
The Option key is used to access
any installed options, such the
Logic Analyzer option.
GDS-2072A/2102A/2202A/2302A Front Panel
17
GDS-2000A Series User Manual
Menu Keys
The Side menu and Bottom menu keys are used to
make selections from the soft-menus on the LCD
user interface.
To choose menu items, use the 7 Bottom menu
keys located on the bottom of the display panel.
To select a variable or option from a menu, use the
Side menu keys on the side of the panel. See page
35 for details.
Hardcopy
Option
Menu Off
Side menu keys
Bottom menu keys
Hardcopy Key
Hardcopy
The Hardcopy key is a quick-save
or quick-print key, depending on
its configuration. For more
information see pages 220(save) or
219(print).
Variable Knob
and Select Key
Select
VARIABLE
The Variable knob is used to
increase/decrease values or to
move between parameters.
The Select key is used to make
selections.
Function Keys
The Function keys are used to enter and configure
different functions on the GDS-2000A.
18
GETTING STARTED
Measure
Measure
Configures and runs automatic
measurements.
Cursor
Cursor
Configures and runs cursor
measurements.
Test
Test
Configures and runs GW Instek
applications.
Acquire
Acquire
Configures the acquisition mode,
including Segmented Memory
acquisition.
Display
Display
Configures the display settings.
Help
Help
Shows the Help menu.
Save/Recall
Save/Recall
Used to save and recall
waveforms, images, panel settings.
Utility
Utility
Configures the Hardcopy key,
display time, language, calibration
and Demo outputs. It also
accesses the file utilities menu.
Autoset
Autoset
Press the Autoset key to
automatically set the trigger,
horizontal scale and vertical scale.
Run/Stop Key
Run/Stop
Press to Freeze (Stop) or continue
(Run) signal acquisition (page 68).
The run stop key is also used to
run or stop Segmented Memory
acquisition (page 114).
Single
Single
Sets the acquisition mode to single
triggering mode.
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GDS-2000A Series User Manual
Default Setup
Default
Resets the oscilloscope to the
default settings.
Horizontal
Controls
The horizontal controls are used to change the
position of the cursor, set the time base settings,
zoom into the waveforms and search for events*.
Horizontal
Position
POSITION
The Position knob is used to
position the waveforms
horizontally on the display screen.
TIME/DIV
TIME/DIV
The Time/Div knob is used to
change the horizontal scale.
Zoom
Zoom
Press Zoom in combination with
the horizontal Position knob.
Play/Pause
The Play/Pause key allows you to
view each search event in
succession – to effectively “play”
through each search event. It is
also used to play through a
waveform in zoom mode.
Search
Search
The Search key accesses the search
function menu to set the search
type, source and threshold.
Search Arrows
Use the arrow keys to navigate the
search events.
20
GETTING STARTED
Set/Clear
Set/Clear
Use the Set/Clear key to set or
clear points of interest when using
the search function.
Trigger Controls
The trigger controls are used to control the trigger
level and options.
Level Knob
LEVEL
Used to set the trigger level.
Trigger Menu Key
Menu
Used to bring up the trigger menu.
50% Key
50 %
Sets the trigger level to the half
way point (50%).
Force - Trig
Force-Trig
Press to force an immediate trigger
of the waveform.
Vertical
POSITION
POSITION
Sets the vertical position of the
waveform.
Channel Menu
Key
CH1
Press the CH1~4 key to set and
configure the channel.
VOLTS/DIV Knob
VOLTS/DIV
Sets the vertical scale of the
channel.
21
GDS-2000A Series User Manual
External Trigger
Input
EXT TRIG
Accepts external trigger signals
(page 144).
Input impedance: 1MΩ
Voltage input: ±15V(peak), EXT
trigger capacitance:16pF.
Math Key
M
MATH
Use the math key to set and
configure math functions.
Reference Key
R
REF
Press the Reference key to set or
remove reference waveforms.
BUS Key
B
BUS
The Bus key is used for parallel
and serial bus (UART, I2C and SPI)
configuration. Serial bus and
parallel bus functionality is
included with the Logic Analyzer
options (DS2-8LA/DS2-16LA).
Channel Inputs
CH1
Accepts input signals.
Input impedance: 1MΩ.
USB Host Port
Demo
TypeA, 1.1/2.0 compatible. Used
for data transfer.
Ground Terminal
Demo
Accepts the DUT ground lead for
common ground.
22
GETTING STARTED
Demo and Probe
Compensation
Outputs
Demo
The Demo outputs are
multifunction outputs that can be
configured for probe
compensation, as a trigger output
or as a basic waveform generator
for demonstration purposes. (FM
signal, UART, I2C, SPI).
By default, the 3 Demo outputs are
configured as:
1: Trigger output
2: FM waveform
3: Probe Compensation signal
CAL (Demo 3) outputs a 2Vp-p,
square wave signal for probe
compensation.
Please see page 171 for details.
Logic Analyzer
Port
Logic Analyzer
The Logic Analyzer port is used to
connect to a Logic Analyzer probe.
This port only functions if the
optional logic analyzer module is
installed.
Function
Generator Output
GEN 1
GEN 2
The function generator outputs are
used with an optional function
generator module.
Power Switch
POWER
Used to turn the power on/off.
: ON
: OFF
23
Rear Panel
LINE VOLTAGE
AC 100 240V
RANGE
FREQUENCY 50 60Hz
POWER MAX. 55W 80VA
CAUTION
TO AVOID ELECTRIC SHOCK THE POWER CORD PROTECTIVE GROUNDING
DO NOT REMOVE COVERS. REFER SERVICING TO QUALIFIED PERSONNEL.
CONDUCTOR MUST BE CONNECTED TO GROUND.
Ser. No. Label
Calibration
output
RS232
port Module Slot 1
Module
Slot 2
Key lock Power input
socket
Ground strap
connector
Go/No Go
output
USB Host
port
USB Device
port
Calibration
Output
Outputs the signal for vertical scale
accuracy calibration (page 243).
USB Device Port
The USB Device port is used for
remote control.
USB Host Port
The USB Host port is used to data
transfer.
Note: Only one rear panel USB port
can be used at a time. Inserting a USB
flash drive into the USB Host Port will
disable the USB Device Port, and vice
versa.
GDS-2000A Series User Manual
24
GETTING STARTED
RS232 Port
Used for RS-232-based remote
control.
Module Slots
The module slots are used to install the optional
modules:
DS2-LAN: Ethernet and SVGA
DS2-GPIB: GPIB
GLA-08: 8 channel logic analyzer
GLA-16: 16 channel logic analyzer
Power Input
Socket
Power cord socket accepts AC
mains, 100 ~ 240V, 50/60Hz.
For power up sequence, see page
32.
Security Slot
Kensington security slot
compatible.
Ground Strap
Connector
For use with a grounding strap.
Go-No Go
Output
Outputs Go-No Go test results
(page 177) as a 500us pulse signal.
25
Display
Memory bar
Digital
waveforms
Analog
Waveforms
Bus
Channel status Horizontal status
Trigger
configuration
Waveform
frequency
Date and time
Trigger position
Acquisition modeTrigger Status
Trigger level
Channel
Indicators
Analog
Waveforms
Shows the analog input signal waveforms.
Channel 1: Yellow
Channel 2: Blue
Channel 3: Pink
Channel 4: Green
Bus Waveforms
Shows the bus waveforms for either parallel or
serial buses. The values are displayed in hex or
binary.
Digital
Waveforms
Shows the digital channel waveforms. There can
be up to 16 digital channels.
Channel
Indicators
The channel indicators show the zero volt level of
the signal waveform for each activated channel.
Any active channel is shown with a solid color.
Analog channel indicator
Bus indicator(B)
Digital channel indicator
Reference waveform indicator
GDS-2000A Series User Manual
26
GETTING STARTED
Math indicator
Trigger Position
Shows the position of the trigger.
Horizontal Status
Shows the horizontal scale and position.
Date and Time
Current date and time (page 170).
Trigger Level
Shows the trigger level on the
graticule.
Memory Bar
The ratio and the position of the
displayed waveform compared
with the internal memory (page
130).
Trigger Status
Triggered.
Pre-trigger.
Not triggered, display not updated.
Trigger stopped. Also appears in
Run/Stop (page 68).
Roll mode.
Auto trigger mode.
For trigger details, see page 144.
Acquisition Mode
Normal mode
Peak detect mode
Average mode
For acquisition details, see page 103.
Signal Frequency
Shows the trigger source
frequency.
27
GDS-2000A Series User Manual
Indicates the frequency is
less than 2Hz (lower
frequency limit).
Trigger
Configuration
Trigger source, slope,
voltage, coupling.
Horizontal Status
Horizontal scale,
horizontal position.
For trigger details, see page 144.
Channel Status
Channel 1, DC coupling,
2V/Div.
For channel details, see page 137.
28
Set Up
Tilt
To tilt, pull the legs forward, as shown below.
Stand
To stand the scope upright, push the legs back
under the casing as shown below.
Tilt Stand
GETTING STARTED
29
GDS-2000A Series User Manual
Background
The GDS-2000A has a number of optional modules
that can be installed into the module slots on the
rear panel. These modules must be installed before
power up.
Note
The modules are not hot-swappable. Please ensure the
power is off before connecting or disconnecting any of
the modules from the rear panel.
Steps
1. Make sure the power is turned off before
installing any of the optional modules.
2. Slide the tabs holding the module cover to the
unlock position and then remove
3. Install the optional module. Be sure to make
sure that the groves on the module line-up to
the slots in the module bay.
4. Slide the tabs back into the lock position.
Module Installation
30
GETTING STARTED
Background
The GDS-2000A has optional software packages to
expand the functionality of the standard GDS2000A.An activation key is required to activate any
optional software. A different activation key is
required for each optional software package.
For the latest files and information regarding the
optional software packages, see the GW Instek
website: www.gwinstek.com or contact your
nearest distributor.
Steps
1. Install any hardware modules if needed. See
page 30 for installation details.
Panel Operation
2. Insert the USB serial key for the
desired option into the front panel
USB A port.
Demo
3. Press the Utility key then the File
Utilities soft-key.
Utility
4. Navigate to the desired file in the
USB file path.
When the desired installation file
has been found, press the Select
key to start the installation.
VARIABLE
Select
Software Installation
31
5. The installation will complete in a few seconds.
When finished a pop-up message will appear
asking you to restart the GDS-2000A.
6. Restart the GDS-2000A.
Power Up
Requirements
The GDS-2000A accepts line voltages of 100 ~ 240V
at 50 or 60Hz.
Step
1. Connect the power cord to
the rear panel socket.
2. Press the POWER key. The
display becomes active in
~ 30 seconds.
: ON
: OFF
POWER
Note
The GDS-2000A recovers the state right before the
power is turned OFF. The default settings can be
recovered by pressing the Default key on the front
panel. For details, see page 202.
GDS-2000A Series User Manual
32
First Time Use
Background
This section describes how to connect a signal,
adjust the scale, and compensate the probe. Before
operating the GDS-2000A in a new environment,
run these steps to make sure the instrument
performs at its full potential.
1. Power On
Follow the procedures on the previous page.
2. Set the Date
and Time
Set the date and time.
Page 170
3. Reset System
Reset the system by recalling the
factory settings. Press the Default key
on the front panel. For details, see
page 202.
Default
4. Install Optional
modules
There are a number of optional
hardware modules that can be
installed, such as the optional
function generator.
Page 30
5. Install Optional
Software
Optional software packages may also
need to be installed.
Page 31
6. Connect Probe
Connect the probe to the Channel 1 input and to
the CAL signal output (Demo 3 output). This
output provides a 2Vp-p, 1kHz square wave for
signal compensation by default.
Set the probe attenuation to x10 if the probe has
adjustable attenuation.
GETTING STARTED
33
GDS-2000A Series User Manual
POSITION
CH1
Demo
x1
x10
X
10
X
1
CH1
Demo
6. Capture Signal
(Autoset)
Press the Autoset key. A square
waveform appears on the center of
the screen. For Autoset details, see
page 66.
Autoset
7. Select Vector
Waveform
Press the Display key, and set the
display to Vector on the bottom menu.
Display
8. Compensate
Probe
Turn the adjustment point on the probe to make
the square waveform edge flat.
34
GETTING STARTED
Under
Compensation
Normal
Over
Compensation
9. Start Operation
Continue with the other operations.
Measurement: page 64
Configuration: page 101
Save/Recall: page 185
File Utilities: page 211
Apps.: page 174
Hardcopy key: page 218
Remote Control: page
222
Maintenance: page 241
Background
This section describes the conventions used in this
manual to operate the GDS-2000A.
Throughout the manual any reference to pressing
a menu key refers to the keys directly below or
beside any menu icons or parameters.
When the user manual says to “toggle” a value or
parameter, press the corresponding menu item.
Pressing the item will toggle the value or
parameter.
How to Use This Manual
35
GDS-2000A Series User Manual
Active parameters are highlighted for each menu
item. For example in the example below, Coupling
is currently set to DC.
If a menu item can be toggled from one value or
parameter to another, the available options will be
visible, with the current option highlighted. In the
example below the slope can be toggled from a
rising slope to a falling slope or either slop.
Menu item
Parameter
Menu item
Active
parameter
Optional
parameters
Menu item
Selecting a Menu
Item, Parameter
or Variable
When the user manual says to “select” a value
from one of the side menu parameters, first press
the corresponding menu key and use the Variable
knob to either scroll through a parameter list or to
increase or decrease a variable.
Example 1
1
2
3
1. Press a bottom menu key to access
the side menu.
36
GETTING STARTED
2. Press a side menu key to either set
a parameter or to access a sub
menu.
3. If accessing a sub menu or setting
a variable parameter, use the
Variable knob to scroll through
menu items or variables. Use the
Select key to confirm and exit.
VARIABLE
Select
4. Press the same bottom menu key
again to reduce the side menu.
Example 2
For some variables, a circular arrow icon indicates
that the variable for that menu key can be edited
with the Variable knob.
1
1. Press the desired menu key to select it. The
circular arrow will become highlighted.
2. Use the Variable knob to edit the value.
37
GDS-2000A Series User Manual
Toggling a Menu
Parameter
1
1. Press the bottom menu key
to toggle the parameter.
Reduce Side
Menu
1
1. To reduce the side menu, press the
corresponding bottom menu that brought up
the side menu.
For example: Press the Source soft-key to
reduce the Source menu.
38
GETTING STARTED
Reduce Lower
Menu
1. Press the relevant function
key again to reduce the
bottom menu. For example:
press the Trigger Menu key
to reduce the trigger menu.
TIME/DIV
Autoset
Menu
50 %
Force-Trig
TRIGGER
Acquire
Single
Run/Stop
POSITION
Test
MW16pF
LEVEL
Zoom
1
Default
1
Remove All
Menus
39
GDS-2000A Series User Manual
1. Press the Menu Off key to
reduce the side menu, press
again to reduce the bottom
menu.
CH1 CH2
POSITION
TIME/DIV
POSITION
POSITION
VOLTS/DIV VOLTS/DIV
Autoset
Menu
50 %
Force-Trig
Select
TRIGGER
HORIZONTAL
VARIABLE
Measure Cursor
Display Help Save/ Recall Utility
Acquire
Single
Run/Stop
Search
Set/Clear
CH3 CH4
POSITION
POSITION
VOLTS/DIV VOLTS/DIV
VERTICAL
M
R
B
Test
CH1 CH2 CH3 CH4 EXT TRIG
MW16pF
1
MW16pF
Hardcopy
Option
Menu Off
LEVEL
Zoom
MATH
REF
Demo
1
BUS
Visual Persistence Oscilloscope
Default
1
Remove OnScreen Messages
2. The Menu Off key can also be
used to remove any on
screen messages.
CH1 CH2
POSITION
TIME/DIV
POSITION
POSITION
VOLTS/DIV VOLTS/DIV
Autoset
Menu
50 %
Force-Trig
Select
TRIGGER
HORIZONTAL
VARIABLE
Measure Cursor
Display Help Save/ Recall Utility
Acquire
Single
Run/Stop
Search
Set/Clear
CH3 CH4
POSITION
POSITION
VOLTS/DIV VOLTS/DIV
VERTICAL
M
R
B
Test
CH1 CH2 CH3 CH4 EXT TRIG
MW16pF
1
MW16pF
Hardcopy
Option
Menu Off
LEVEL
Zoom
MATH
REF
Demo
1
BUS
Visual Persistence Oscilloscope
Default
1
40
QUICK REFERENCE
Menu Tree / Operation Shortcuts .................................... 43
Convention ........................................................................... 43
Acquire Key .......................................................................... 44
Acquire Key - Segments ...................................................... 44
Autoset Key .......................................................................... 45
CH1 ~ 4 Key ........................................................................ 45
Cursor Key ............................................................................ 46
Display Key ........................................................................... 46
Help Key ............................................................................... 46
Math Key ............................................................................... 47
Measure Key ......................................................................... 48
Hardcopy Key ....................................................................... 49
Run/Stop Key ...................................................................... 49
REF Key ................................................................................ 49
Save/Recall Key ................................................................... 50
Test Key ................................................................................ 51
Test Key – Go-NoGo ......................................................... 51
Trigger Type Menu .............................................................. 52
Trigger Edge Menu .............................................................. 52
Trigger Delay Menu ............................................................. 53
Trigger Pulse Width Menu .................................................. 53
Trigger Video Menu ............................................................ 53
Trigger Pulse Runt Menu .................................................... 54
Trigger Rise & Fall Menu .................................................... 54
Trigger Timeout Menu ........................................................ 54
Utility Key ............................................................................. 55
Utility Key – I/O ................................................................. 56
Utility Key – File Utilities .................................................... 56
QUICK REFERENCE
This chapter describes the GDS-2000A menu tree,
shortcuts to major operations, built-in Help
access, and default factory settings. Use them as a
handy reference to get a quick access to the
functionality.
41
GDS-2000A Series User Manual
Utility Key – Wave Generator - Demo Outputs ............. 57
Search - Edge ........................................................................ 57
Search – Pulse Width ........................................................... 58
Search - Runt ........................................................................ 58
Search – Rise/Fall Time ...................................................... 59
Zoom Key ............................................................................. 59
Option Key ........................................................................... 60
Default Settings .............................................................. 61
Built-in Help ................................................................... 63
42
QUICK REFERENCE
For all menu trees, the bottom menu keys are
shown as grey icons and side menu keys are
shown in white. All menu tree operations are
shown in order from top to bottom.
Below is an example of the menu tree operation for
the trigger source menu and a comparison to the
operation on the DSO screen.
Menu Tree
Type
Edge
Source Coupling Slope Level Mode Holdoff
CH1~ CH4
EXT
AC Line
EXT Probe
Volt
Current
DC
AC
0.00V~ XX.XV
Set to TTL
1.4V
Set to ECL
-1.3V
Set to 50%
Auto
Normal
00.0ns~
Xxx.xxns
Set to
Minimum
EXT Probe
On
Off
Alternate
1
2
3
1mX ~ 1kX
Attenuation
Off
HF
LF
Reject
On
Off
Noise Reject
On Screen Menu
1 2
3
Menu Tree / Operation Shortcuts
Convention
43
GDS-2000A Series User Manual
Sets the acquisition mode.
Segments
Goes to the Segments menu
Reset H
Position to 0s
XY ET
Sample rate
XXXMSPS
OFF'YT(
Triggered
XY
ET
Sin(x)/x
Mode
Sample
Peak Detect
2,4,8,16,32,64,
128,256
Average
Off, 1% ~ 49%
of sample rate,
Off
Digital Filter
Record
Length
Auto
Short
Acquire
Segments
Setup the Segmented Memory function.
Segmented
Select
Segments
Analyze
Segments
Save
Segmented
Segments
Stop
Run
On
Off
Display All
1~2048
Current Seg
Segment
Time
Go Back
On
Off
1~2048
Num of Segs
Set to Maximum
Set to Minimum
Segments
Measure
Segments
Info
CH1~CH4
D0~D15
From
Select
Segmented
To File
DSXXX.CSV
Save Now
File Utilities
Sements Info
Turns on the segments information
overlay.
Segments
Measure
File Utilties
Goes to the File Utilities menu
1~2048
Start
1~2048
End
Set to Minimum
Set to Maximum
Go Back
Off
Plot Source
1~2048
Select
1~20
Divided
Off
1~2048
Select
Save Meas.
to File
CH1~CH4
Source
Acquire Key
Acquire Key - Segments
44
Autoset Key
Automatically finds the signal and sets the horizontal and vertical
scale.
Undo AutosetMode
Fit Screen
AC Priority
Autoset
Set the channel input parameters.
Voltage
Current
Probe
Impedence Invert Bandwidth Expand by
Position/
Set to 0
xxxV
Probe
On
Off
Coupling
AC
DC
GND
Full
20MHz
100MHz
200MHz
1MΩ
1mX ~ 1kX
Set to 10X
Attenuation
-50ns~50ns
Set to 0s
Deskew
Ground
Center
CH1
CH1 ~ 4 Key
QUICK REFERENCE
45
Cursor Key
Set cursor positions.
V CursorH Cursor H Unit
Set Cursor
Positions As
100%
Set Cursor
Positions As
100%
S
Hz
%
˚
V Unit
Base
%
Activates menu
item
Activates menu
item
Cursor
Set the display properties.
Dot Vector Persistence
Dot
Vector
Clear
Persistence
100ms~10s
Infinite
VPO Off
Time
Intensity
0%~100%
Waveform Intensity
10%~100%
Graticule Intensity
Waveform
Gray
Color
Graticule
Full
Grid
Cross Hair
Frame
Display
Turn help mode On/Off.
Help
Display Key
GDS-2000A Series User Manual
Help Key
46
Math Key
Standard math and FFT functions.
FFT
Math
CH1~CH4
Ref1~Ref4
Source 1
XXDiv
Position
+
×
÷
Operator
CH1~CH4
Ref1~Ref4
Source 2
XX~XXV
Unit/Div
Advanced
Math
d/dt
∫dt
√
Operator
CH1~CH4
Ref1~Ref4
f(x)
Source
Edit f(x)
XXDiv
Position
XX~XX
Unit/Div
Hanning
Rectangular
Hamming
Blackman
Window
1X
X.XXXMHz
Zoom
CH1~CH4
Ref1~Ref4
f(x)
Source 1
dBV RMS
Linear RMS
Vertical
XXdB
XXDiv
Vertical
M
MATH
+
×
÷
Operator
CH1~CH4
Source 2
Go Back
CH1~CH4
Source 2
QUICK REFERENCE
47
Display automatic measurements either individually or as
voltage/current, time or delay measurement groups.
Remove
Measurement
Gating Display All
Off
(Full Record)
Add
Measurement
Pk-Pk
Max
Min
Amplitude
High
Low
Mean
Cycle Mean
RMS
Cycle RMS
Area
Cycle Area
ROVShoot
FOVShoot
RPREShoot
FPREShoot
V/I
Frequency
Period
RiseTime
FallTime
+Width
-Width
Dutycycle
+Pulses
-Pulses
+Edges
-Edges
Time
FRR
FRF
FFR
FFF
LRR
LRF
LFR
LFF
Phase
Delay
Screen
Between
Cursors
CH1~CH4
Math
D0~D15
Source 1
High-Low
Auto
High-Low:
Histogram (best
for pulses)
High-Low:
Min-Max
(all other
waveforms)
Set to
Defaults
CH1~CH4
Math
Source 2
Select
Measurement
Remove
Measurement
CH1~CH4
Math
D0~D15
Source
OFF
Statistics
On
Off
Statistics
Samples: 2~XX
Mean & Std Dev
Reset Statistics
Measure
GDS-2000A Series User Manual
Measure Key
48
Hardcopy Key
Hardcopy
Print screen images or save a waveform, screen
image or setup (depending on the assigned
function).
Run/Stop
Run/stop signal acquisition.
R
REF
R2ON/OFF R3ON/OFF R4ON/OFFR1ON/OFF
Vertical scale
Vertical position
Vertical
Horizontal scale
Horizontal position
Horizontal
Edit Labels
Ref Details
Save To File
Goes to the Save Waveform
menu (Save/Recall)
Goes to the Edit Labels menu
(Save/Recall)
Vertical scale
Vertical position
Vertical
Horizontal scale
Horizontal position
Horizontal
Vertical scale
Vertical position
Vertical
Horizontal scale
Horizontal position
Horizontal
Vertical scale
Vertical position
Vertical
Horizontal scale
Horizontal position
Horizontal
Run/Stop Key
REF Key
QUICK REFERENCE
49
Save and recall images, waveforms and panel setups. Edit labels for
reference and setup files.
Save Waveform Save Setup
Recall
Waveform
Recall
Setup
Edit File
Label
Edit Label
Save Image
Png
Bmp
File Format
On
Off
Ink Saver
Save Now
File Utilites
Set1~Set20
Filename.set
CH1~CH4
Ref1~4
Set1~20
Label For
ACK
AD0
ADDR
ANALOG
BIT
CAS
CLK
CLOCK
CLR
COUNT
DATA
DTACK
ENABLE
HALT
INT
IN
IRQ
LATCH
LOAD
NMI
User Preset
Edit Character
CH1~CH4
Math
Ref1~4
D0~D15
All Displayed
From
Ref 1 ~ Ref4
Wave1~20
Lsf
Detail Csv
Fast Csv
LM Detail Csv
LM Fast Csv
To
To File
Save Now
File Utilites
Save Now
File Utilites
To File
To
Ref1~Ref4
To
Wave1~20
Lsf
Fast Csv
From
From File
Recall Now
File Utilites
Edit Label
Set1~Set20
Filename.set
From File
From
Recall Now
File Utilites
Goes to the File Utilities menuFile Utilites
Goes to the Keypad menuEdit Character
Goes to the Edit label menuEdit Label
On
Off
Label Display
Save/Recall
GDS-2000A Series User Manual
Save/Recall Key
50
QUICK REFERENCE
Use the Go-NoGo application as well as other optional software.
APP.
Go-NoGo
Go-NoGo
Goes to the Go-NoGo menu
Unistall
Test
NG When Violating
Compare
Source
Reference
Mode
Enable
GoNo
CH1
Enter Stop
Exit
Break
Go Back
Break
Stop Beep
Continue
Continue Beep
Go Back
Break
CH2
CH3
CH4
Go Back
Break
Auto
Tolerance
Maximum
Position
Minimum
Position
Save
Operation
Go Back
Break
Disable
Test Key
Test Key – Go-NoGo
51
GDS-2000A Series User Manual
Menu
Type
Pulse Runt
Rise & Fall
Bus
Logic
Others
Edge
Delay
Pulse Width
Video
Goes to the Edge Trigger menu
Goes to the Pulse Width Trigger
menu
Goes to the Video Trigger menu
Goes to the Pulse Runt Trigger menu
Goes to the Rise and Fall menu
Goes to the Bus menu
Goes to the Logic menu
Type
Edge
Source Coupling Slope Level Mode Holdoff
CH1~ CH4
EXT
AC Line
D0~D15
EXT Probe
Volt
Current
DC
AC
-XX~XXV
Set to TTL
1.4V
Set to ECL
-1.3V
Set to 50%
Auto
Normal
10.0ns~
10.0s
Set to
Minimum
EXT Probe
Off
HF
LF
Reject
On
Off
Noise Reject
On
Off
Alternate
1mX ~ 1kX
Attenuation
Trigger Type Menu
Trigger Edge Menu
52
QUICK REFERENCE
DC
AC
Off
HF
LF
Reject
On
Off
Noise Reject
Type
Delay
Source Coupling Slope Level Delay Mode / Holdoff
-XX~XXV
Set to TTL
1.4V
Set to ECL
-1.3V
Set to 50%
10.0ns ~ 10.0s
Auto
Normal
Holdoff
10.00ns ~ 10.0s
Set to
Minimum
Time
1~65535
Event Holdoff
Set to
Minimum
Type
Pulse Width
Source Polarity When Threshold Mode Holdoff
CH1~ CH4
EXT
AC Line
D0~D15
>
<
=
≠
-XX~XXV
Set to TTL
1.4V
Set to ECL
-1.3V
Set to 50%
Auto
Normal
10.0ns ~ 10.0s
> 10.0ns~10.0S
EXT Probe
Volt
Current
EXT Probe
Set to
Minimum
On
Off
Alternate
1mX ~ 1kX
Attenuation
Type
Video
Source Standard Trigger On Polarity Mode Holdoff
CH1~ CH4
NTSC
PAL
SECAM
1~XXXX
Auto
Normal
All Fields
All Lines
EXT Probe
Volt
Current
EXT Probe
Field 1
1~XXXX
Field 2
10.0ns ~ 10.0s
Set to
Minimum
On
Off
Alternate
1mX ~ 1kX
Attenuation
Trigger Delay Menu
Trigger Pulse Width Menu
Trigger Video Menu
53
GDS-2000A Series User Manual
Type
Pulse Runt
Source Polarity Mode Holdoff
Auto
Normal
EXT Probe
Volt
Current
When
>
<
=
≠
10.0ns~10.0s
Threshold
Set to TTL
1.4V
Set to ECL
-1.3V
-XX~XXV
-XX~XXV
10.0ns~10.0s
Set to
Minimum
On
Off
Alternate
CH1~ CH4
1mX ~ 1kX
Attenuation
Type
Rise & Fall
Source Mode Holdoff
Auto
Normal
When
>
<
=
≠
10.0ns~10.0s
Threshold
Set to TTL
1.4V
Set to ECL
-1.3V
-XX~XXV
-XX~XXV
Slope
High
Low
10.0ns~10.0s
Set to
Minimum
EXT Probe
Volt
Current
On
Off
Alternate
CH1~ CH4
1mX ~ 1kX
Attenuation
Type
Timeout
Source Timer
10.0ns~10.0s
Trigger
When
EXT Probe
Volt
Current
CH1~ CH4,
D0~D15, AC
Line
1mX ~ 1kX
Attenuation
DC
AC
Off
HF
LF
Reject
On
Off
Noise Reject
Coupling
Stays High
Stays Low
Either
Level
-XX~XXV
Set to TTL
1.4V
Set to ECL
-1.3V
Set to 50%
Mode / Holdoff
Auto
Normal
Holdoff
10.00ns ~ 10.0s
Holdoff
Set to
Minimum
Trigger Pulse Runt Menu
Trigger Rise & Fall Menu
Trigger Timeout Menu
54
System
Data &
Time
Hardcopy
File Utilities
I/OLanguage
English
Trad. Chinese
Simp. Chinese
Korean
Japanese
Polish
French
Spanish
Russian
German
Ethernet
RS-232C
System
Info
SPC
On
Off
Ink Saver
Print
Save
Function
Create Folder
Rename
Delete
More 1 of 2
2XXX
Year
Jan~Dec
01~31
Month Day
0~59
0~59
Hour Minute
Save Now
USB Device
Bmp
Png
File Format
Erase Memory
Image
Waveform
Setup
All
Assign Save To
Socket Server
More 1 of 2
Ethernet
RS-232C
USB Device
Port
Goes to the I/O USB Device
Port menu
Goes to the I/O Ethernet menu
Goes to the I/O RS232 menu
Socket Server
Create Folder
Goes to the I/O Socket Server
menu
Goes to the File Utilities
Rename
Goes to the File Utilities
SPC
Start
Abort
On
Off
Buzzer
0~30
GPIB
Demo Output
Analog
UART
I2C
SPI
Demo Mode
Demo 1*
Demo 2*
Demo 1~3*
See Wave Gener
Self Cal
Factory Setting
Self Cal
Option
Uninstall
More
2 of 2
Goes back to System menu
Goes to Uninstall menu
Goes to the Self Cal menu
Goes to the Factory menu
Goes to the Self Cal menu
Utility
Port
Demo 3*
* Demo 1, Demo 2, Demo 3 outputs depend on the Demo Output
settings.
QUICK REFERENCE
Utility Key
55
GDS-2000A Series User Manual
I/O
USB Device
Port
Ethernet
RS-232C
Go Back
Save Now
On
Off
DHCP/BOOTP
2400, 4800,
9600, 19200,
38400, 57600,
115200
Baud Rate
1, 2
Stop Bit
Odd
Even
None
Parity
Back Space
Save Now
Socket Server
On
Off
Server
Current Port
3000
0 to 65535
Select Port
Set Port
Computer
Printer
File Utilities Create Folder
Rename
Delete
Keypad
Enter Character
Back Space
Editing
Completed
Cancel
Keypad
Enter Character
Back Space
Editing
Completed
Cancel
Copy To USB
Utility Key – I/O
Utility Key – File Utilities
56
QUICK REFERENCE
Demo Output
Analog
UART
I2C
SPI
Demo Mode
Demo 1
SCLK
Demo 1
SCLK
Demo 1
Tx
Demo 1
Trigger Output
Demo 3
MOSI
Demo 3
Probe Comp.
Demo 3
Probe Comp.
Demo 3
Probe Comp.
Demo 2
SS
Demo 2
SDA
Demo 2
Rx
Demo 2
FM
1~200kHz
Default
1kHz
Frequency
5~95%
Dutycycle
Set the Search Function for edge events.
Search
On
Off
Search
Save All
Marks
Clear All
Marks
Copy Trigger
Settings To
Search
Copy Search
Settings To
Trigger
Search Type
Edge
Pulse Width
Runt
Rise/Fall Time
Logic
Bus
Search
Slope Threshold
-XX~XXV
Set to TTL
1.4V
Set to ECL
-1.3V
Set to 50%
Search
Source
CH1~ CH4
D0~D15
Utility Key – Wave Generator - Demo Outputs
Search - Edge
57
GDS-2000A Series User Manual
Set the Search Function for pulse width events.
Edge
Pulse Width
Runt
Rise/Fall Time
Logic
Bus
Search
Search
On
Off
Search
Save All
Marks
Clear All
Marks
Copy Trigger
Settings To
Search
Copy Search
Settings To
Trigger
Search Type
Polarity
When
>
<
=
≠
10.0ns~10.0S
Threshold
-XX~XXV
Set to TTL
1.4V
Set to ECL
-1.3V
Set to 50%
Source
CH1~ CH4
D0~D15
Search
Set the Search function for runt events.
Edge
Pulse Width
Runt
Rise/Fall Time
Logic
Bus
Search
Polarity When
>
<
=
≠
10.0ns~10.0S
Threshold
Set to TTL
1.4V
Set to ECL
-1.3V
-XX~XXV
-XX~XXV
Search
On
Off
Search
Save All
Marks
Clear All
Marks
Copy Trigger
Settings To
Search
Copy Search
Settings To
Trigger
Search Type
Search
Source
CH1~ CH4
D0~D15
Search – Pulse Width
Search - Runt
58
QUICK REFERENCE
Set the Search function for rise and fall time events.
Edge
Pulse Width
Runt
Rise/Fall Time
Logic
Bus
Search
Slope When
>
<
=
≠
10.0ns~10.0s
Threshold
Set to TTL
1.4V
Set to ECL
-1.3V
-XX~XXV
-XX~XXV
High
Low
Search
On
Off
Search
Save All
Marks
Clear All
Marks
Copy Trigger
Settings To
Search
Copy Search
Settings To
Trigger
Search Type
Source
CH1~ CH4
Search
*The source bus is determined from the bus trigger settings.
H Position/
Set to 0
Zoom Position/
Set to 0
Zoom Position
Reset Zoom &
H POS to 0s
XXXXmsXXXXms
Fine
Coarse
Zoom
Search – Rise/Fall Time
Zoom Key
59
Option Key
Accesses the functions in the Option menu.
Function
Generator
I/O
Logic
Analyzer
Option
Logic
Analyzer
Function
Generator
Goes to the Logic Analyzer menu
Goes to the Function Generator menu
I/O
Goes to the options I/O menu
*Note: Any option that is not installed will be grayed-out.
GDS-2000A Series User Manual
60
QUICK REFERENCE
The default factory installed settings can be
recalled at any time by pressing the Default key.
Default
Acquire
Mode: Sample
XY: OFF
Interpolation: Sin(x)/x
Sample rate: 2GSPS
Record Length: Auto
Display
Mode: Vector
Persistence: 240ms
Waveform intensity: 50%
Graticule intensity: 50%
Waveform visuals: Gray
Graticule: full
Channel
Scale: 100mV/Div
CH1: On
Coupling: DC
Impedance: 1MΩ
Invert: Off
Bandwidth: full
Expand: By ground
Position: 0.00V
Probe: voltage
Probe attenuation: 1x
Deskew: 0s
Cursor
Horizontal cursor: Off
Vertical Cursor: Off
Measure
Source: CH1
Gating: Screen
Display: Off
High-Low: Auto
Statistics: Off
Mean & Std Dev
Samples: 2
Horizontal
Scale: 10us/Div
Position: 0.000s
Math
Source1: CH1
Operator: +
Source2: CH2
Position: 0.00 Div
Unit/Div: 200mV
Math Off
Test
App: Go-NoGo
Trigger
Type: Edge
Source: CH1
Default Settings
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GDS-2000A Series User Manual
Coupling: DC
Alternate: Off
Rejection: Off
Noise Rejection: Off
Slope: Positive
Level: 0.00V
Mode: Auto
Holdoff: 10.0ns
Utility
Hardcopy: Save
Ink Saver: Off
Assign Save To: Image
File Format: Bmp
Search
Search: Off
Segments
Segments: Off
62
QUICK REFERENCE
The Help key accesses a context sensitive help menu. The help menu
contains information on how to use the front panel keys.
Panel Operation
1. Press the Help key. The
display changes to Help
mode.
Help
2. Use the Variable knob to scroll up and down
through the Help contents. Press Select to view
the help on the selected item.
Example: Help on
the Display key
Home Key
Press the Home key to return to
the main help screen.
Go Back
Press the Back key to go to the
previous menu page.
Exit
Press the Help key again or press
the Exit key to exit the Help
mode.
Help
Built-in Help
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GDS-2000A Series User Manual
Basic Measurement ......................................................... 65
Channel Activation .............................................................. 65
Autoset .................................................................................. 66
Run/Stop .............................................................................. 68
Horizontal Position/Scale .................................................. 69
Vertical Position/Scale ........................................................ 71
Automatic Measurement ................................................. 72
Measurement Items ............................................................. 72
Add Measurement ................................................................ 76
Remove Measurement ......................................................... 78
Gated mode .......................................................................... 79
Display All mode .................................................................. 80
High Low Function ............................................................. 81
Statistics ................................................................................. 83
Cursor Measurement ....................................................... 85
Use Horizontal Cursors ...................................................... 85
Use Vertical Cursors ............................................................ 89
Math Operation .............................................................. 93
Overview ............................................................................... 93
Addition/Subtraction/Multiplication/Division .............. 94
FFT ........................................................................................ 96
Advanced Math .................................................................... 98
Edit F(x) .............................................................................. 100
MEASUREMENT
64
MEASUREMENT
Activate Channel
To activate an input channel,
press a channel key.
When activated, the channel
key will light up. The
corresponding channel menu
will also appear.
CH1CH1
Each channel is associated with the color shown
beside the VOLTS/DIV dial: CH1: yellow, CH2:
blue, CH3: pink and CH4: green.
When a channel is activated, it is shown above the
bottom menu system.
CH1 CH3CH2 CH4
De-activate
Channel
To de-activate a channel, press
the corresponding channel key
again. If the channel menu is
not open, press the channel key
twice (the first press shows the
Channel menu).
CH1CH1
Basic Measurement
This section describes the basic operations required in capturing
and viewing the input signal. For more detailed operations, see the
following chapters.
Cursor Measurement → from page 85
Configuration → from page 101
Before operating the oscilloscope, please see the Getting Started
chapter, page 10.
Channel Activation
65
Default Setup
To activate the default state,
press Default.
Default
Autoset
Background
The Autoset function automatically configures the
panel settings to position the input signal to the
best viewing condition. The GDS-2000A
automatically configures the following parameters.
Horizontal scale
Vertical scale
Trigger source channel
There are two operating modes for the Autoset
function: Fit Screen Mode and AC Priority Mode.
Fit Screen Mode will fit the waveform to the best
scale, including any DC components (offset). AC
priority mode will scale the waveform to the
screen by removing any DC component.
Panel Operation
1. Connect the input signal to the
GDS-2000A and press the Autoset
key.
Autoset
2. The waveform appears in the center of the
display.
Before
After
3. To undo Autoset, press Undo
Autoset from the bottom menu.
GDS-2000A Series User Manual
66
MEASUREMENT
Change modes
1. Choose between Fit Screen Mode
and AC Priority Mode from the
bottom menu.
2. Press the Autoset key again to use
Autoset in the new mode.
Autoset
Fit Screen Mode
AC Priority
Limitation
Autoset does not work in the following situations.
Input signal frequency is less than 20Hz
Input signal amplitude is less than 30mV
Note
The Autoset key (page 66) does NOT automatically
activate the channels to which input signals are
connected.
67
Run/Stop
Background
By default, the waveform on the display is
constantly updated (Run mode). Freezing the
waveform by stopping signal acquisition (Stop
mode) allows flexible observation and analysis. To
enter Stop mode, two methods are available:
pressing the Run/Stop key or using the Single
Trigger mode.
Stop mode icon
When in Stop mode, the Stop icon
appears at the top of the display.
Triggered icon
Freeze Waveform
by Run/Stop Key
Press the Run/Stop key once.
The Run/Stop key turns red.
The waveform and signal
acquisition freezes.
Stop:
Run/Stop Run/Stop
To unfreeze, press the Run/Stop
key again. The Run/Stop key
turns green again.
Run:
Run/Stop Run/Stop
Freeze Waveform
by Single Trigger
Mode
Press the Single key to go into
the Single Trigger mode. The
Single key turns bright white.
In the Single Trigger mode, the
scope will be put into the pretrigger mode until the scope
encounters the next trigger
point. After the scope has
triggered, it will remain in Stop
mode, until the Single key is
pressed again or the Run/Stop
key is pressed.
Single Single
GDS-2000A Series User Manual
68
MEASUREMENT
Waveform
Operation
The waveform can be moved or scaled in both Run
and Stop mode, but in different manners. For
details, see page 130 (Horizontal position/scale)
and page 137 (Vertical position/scale).
Set Horizontal
Position
The horizontal position knob
moves the waveform left and
right.
POSITION
As the waveform moves, the display bar on the top
of the display indicates the portion of the
waveform currently shown on the display and the
position of the horizontal marker on the
waveform.
Position Indicator
The horizontal position is shown at the bottom of
the display grid to the right of H icon.
Select Horizontal
Scale
To select the timebase (scale),
turn the TIME/DIV knob; left
(slow) or right (fast).
TIME/DIV
Range
1ns/div ~ 100s/div, 1-2-5 increments
Horizontal Position/Scale
For more detailed configuration, see page 130.
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GDS-2000A Series User Manual
The Time/Division rate is displayed to the left of the H
icon at the bottom of the screen.
Display bar
The display bar indicates how much
of the waveform is displayed on the
screen at any given time. Changes to
timebase will be reflected on the
display bar.
Fast
Medium
Slow
Stop mode
In the Stop mode, the waveform size
changes according to the scale.
Note
The Sample rate changes according to the
time/division and record length. See page 109.
70
MEASUREMENT
Set Vertical
Position
To move the waveform up or
down, turn the vertical position
knob for each channel.
POSITION
As the waveform moves, the vertical position of
the cursor appears on the display.
Run/Stop
mode
The waveform can be moved
vertically in both Run and Stop
mode.
Select Vertical
Scale
To change the vertical scale,
turn the VOLTS/DIV knob; left
(down) or right (up).
VOLTS/DIV
Range
1mV/div ~ 10V/div
1-2-5 increments
The vertical scale indicator for
each channel on the bottom of
the display changes
accordingly.
Vertical Position/Scale
For more detailed configuration, see page 137.
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GDS-2000A Series User Manual
V/I Measurements
Time Meas.
Delay Meas.
Overview
FPREShoot
RPREShoot
FOVShoot
ROVShoot
Cycle Area
Area
Cycle RMS
RMS
Cycle Mean
Mean
Low
High
Amplitude
Min
Max
Pk-Pk
Frequency*
Dutycycle*
-Width*
+Width*
FallTime
RiseTime
Period*
-Edges
+Edges
-Pulses
+Pulses
FRR
FRF
FFR
Phase
LFF
LFR
LRF
LRR
FFF
*The logic analyzer option is needed to use the digital
channels for these automatic measurements.
Voltage/Current
Measurement
Pk-Pk
(peak to
peak)
Difference between positive
and negative peak.
(=max − min)
Automatic Measurement
The automatic measurement function measures and updates major
items for Voltage/Current, Time, and Delay type measurements.
Measurements can be made with both the analog channels and the
digital channels*, however the digital channels are only limited to a
select number of time measurements. *Logic analyzer option
needed for digital channels.
Measurement Items
72
MEASUREMENT
Max
Positive peak.
Min
Negative peak.
Amplitude
Difference between the
global high and value and
the global low value,
measured over the entire
waveform or gated region.
(=high − low)
High
Global high voltage. See
page 81 for details.
Low
Global low voltage. See page
81 for details.
Mean
The arithmetic mean value is
calculated for all data
samples as specified by the
Gating option.
Cycle Mean
The arithmetic mean value is
calculated for all data
samples within the first cycle
found in the gated region.
RMS
The root mean square of all
data samples specified by the
Gating option.
Cycle RMS
The root mean square value
is calculated for all data
samples within the first cycle
found in the gated region.
Area
Measures the positive area of
the waveform and subtracts
it from the negative area. The
ground level determines the
division between positive
and negative areas.
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GDS-2000A Series User Manual
Cycle Area
The Summation based on all
data samples within the first
cycle found in the gated
region.
ROVShoot
Rise overshoot
FOVShoot
Fall overshoot
RPREShoot
Rise preshoot
FPREShoot
Fall preshoot
Time
Measurement
Frequency
Frequency of the waveform.
Period
Waveform cycle time.
(=1/Freq)
RiseTime
The time required for the
leading edge of the first
pulse to rise from the low
reference value to the high
reference value.
FallTime
The time required for the
falling edge of the first pulse
to fall from the high
reference value to the low
reference value.
+Width
Positive pulse width.
–Width
Negative pulse width.
Duty Cycle
Ratio of signal pulse
compared with whole cycle.
=100x (Pulse Width/Cycle)
+Pulses
Measures the number of
positive pulses.
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MEASUREMENT
-Pulses
Measures the number of
negative pulses.
+Edges
Measures the number of
positive edges.
-Edges
Measures the number of
negative edges.
Delay
Measurement
FRR
Time between:
Source 1 first rising edge and
Source 2 first rising edge.
FRF
Time between:
Source 1 first rising edge and
Source 2 first falling edge.
FFR
Time between:
Source 1 first falling edge
and Source 2 first rising
edge.
FFF
Time between:
Source 1 first falling edge
and Source 2 first falling
edge.
LRR
Time between:
Source 1 first rising edge and
Source 2 last rising edge.
LRF
Time between:
Source 1 first rising edge and
Source 2 last falling edge.
LFR
Time between:
Source 1 first falling edge
and Source 2 last rising edge.
LFF
Time between:
Source 1 first falling edge
and Source 2 last falling
edge.
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GDS-2000A Series User Manual
Phase
The phase difference of two
signals, calculated in
degrees.
360x
t2
t1
Note
The in-built help system can be used to see detailed
automatic measurement definitions.
Add
Measurement
Item
1. Press the Measure key.
Measure
2. Press Add Measurement from the
bottom menu.
3. Choose either a V/I, Time or Delay
measurement from the side menu
and choose the type of
measurement you wish to add.
V/I
(Voltage/
Current)
Pk-Pk, Max, Min, Amplitude, High,
Low, Mean, Cycle Mean, RMS,
Cycle RMS, Area, Cycle Area,
ROVShoot, FOVShoot, RPREShoot,
FPREShoot
Add Measurement
The Add Measurement function allows you to add up to eight
automatic measurement items on the bottom of the screen from any
channel source.
76
MEASUREMENT
Time
Frequency, Period, RiseTime,
FallTime, +Width, –Width, Duty
Cycle, +Pulses, -Pulses, +Edges, Edges
Delay
FRR, FRF, FFR, FFF, LRR, LRF, LFR,
LFF, Phase
4. All measurements will be displayed in a
window on the bottom of the screen. The
channel number and channel color indicate the
measurement source.
For the analog inputs: yellow = CH1,
blue = CH2, pink = CH3, green = CH4.
Choose a Source
The channel source for measurement items can be
set either before or when selecting a measurement
item.
1. To set the source, press either the
Source1 or Source2 key from the
side menu and choose the source.
Source 2 is only applicable for
delay measurements.
Range
CH1~ CH4, Math*, D0~D15**
*The math source cannot include any digital
(D0~D15) inputs.
**Only available with the Logic Analyzer
option.
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GDS-2000A Series User Manual
Remove
Measurement
Item
1. Press the Measure key.
Measure
2. Press Remove Measurement from the
bottom menu.
3. Press Select Measurement and select
the item that you want to remove
from the measurement list.
Remove All Items
Press Remove All to remove all the
measurement items.
Remove Measurement
Individual measurements can be removed at any time using the
Remove Measurement function.
78
MEASUREMENT
Set Gating Mode
1. Press the Measure key.
Measure
2. Press Gating from the bottom
menu.
3. Choose one of the gating modes
from the side menu: Off (full
record), Screen, Between Cursors
Cursors On
Screen
If Between Cursors is selected, the
cursor positions can be edited by
using the cursor menu.
Page 85
Gated mode
Some automatic measurements can be limited to a “gated” area
between cursors. Gating is useful for measuring a magnified
waveform or when using a fast time base. The Gated mode has
three possible configurations: Off (Full Record), Screen and
Between Cursors.
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GDS-2000A Series User Manual
View
Measurement
Results
1. Press the Measure key.
Measure
2. Press Display All from the bottom
menu.
3. Press Source from the side menu
and choose a measurement source.
Range
CH1~CH4, Math, D0~D15
4. The results of Voltage and Time type
measurements appear on the display.
Remove
Measurements
To remove the measurement results,
press OFF.
Display All mode
Display All mode shows and updates all items from Voltage and
Time type measurements.
80
MEASUREMENT
Delay
Measurements
Delay type measurement is not available in this
mode as only one channel is used as the source.
Use the Individual measurement mode (page 76)
instead.
Digital Channels
Only Frequency, Period, +Width, -Width and Duty
Cycle measurements are supported for digital
channels.
Background
The High-Low function is used to select the
method for determining the value of the High-Low
measurement values.
Auto
Automatically chooses the best
high-low setting for each
waveform when measuring.
Histogram
Uses histograms to determine the
high-low values. This mode
ignores any preshoot and
overshoot values. This mode is
particularly useful for pulse-type
waveforms
low
high
High Low Function
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GDS-2000A Series User Manual
Min-max
Sets the high-low values as the
measured minimum or maximum
measured values.
low
high
Set High-Low
1. Press the Measure key.
Measure
2. Press High-Low from the bottom
menu.
3. Select the type of High-Low settings from the
side menu.
High-Low Settings:
Histogram, Min-Max,
Auto
Restore Default
High-Low
Settings
To return to the default High-Low
settings, press Set to Defaults.
82
Statistics
Background
The Statistics function can be used to view a
number of statistics for the selected automatic
measurements. The following information is
displayed with the Statistics function:
Value
Currently measured value
Mean
The mean value is calculated from
a number of automatic
measurement results. The number
of samples used to determine the
mean can be user-defined.
Min
The minimum value observed
from a series of measured results
for the selected automatic
measurement items.
Max
The maximum value observed
from a series of measured results
for the selected automatic
measurement items.
Standard
Deviation
The variance of the currently
measured value from the mean.
The standard deviation equals the
squared root of the variance value.
Measuring the standard deviation
can, for example, determine the
severity of jitter in a signal.
The number of samples used to
determine the standard deviation
can be user-defined.
Set High-Low
1. Press the Measure key.
Measure
2. Select at least one automatic
measurement.
Page 76
MEASUREMENT
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GDS-2000A Series User Manual
3. Set the number of samples to be
used in the mean and standard
deviation calculations.
Samples:
2~1000
4. Press Statistics from the bottom
menu and turn the Statistics
function on.
5. The statistics will appear at the bottom of the
display in a table.
Reset Statistics
To reset the statistics calculations,
press Reset Statistics.
84
MEASUREMENT
Panel Operation/
Range
1. Press the Cursor key once.
Cursor
2. Press H Cursor from the bottom
menu if it is not already selected.
3. When the H Cursor is selected,
repeatedly pressing the H Cursor
key or the Select key will toggle
which cursor is selected.
OR
Select
Range
Description
Left cursor ( ) movable, right
cursor position fixed
Right cursor ( ) movable, left
cursor position fixed
Left and right cursor ( + )
movable together
Cursor Measurement
Horizontal or vertical cursors are used to show the position and
values of waveform measurements and math operation results.
These results cover voltage, time, frequency and other math
operations. When the cursors (horizontal, vertical or both) are
activated, they will be shown on the main display unless turned off.
(page 129).
Use Horizontal Cursors
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GDS-2000A Series User Manual
4. The cursor position
information appears on the
top left hand side of the
screen
Cursor
Hor. position, Voltage/Current
Cursor
Hor. position, Voltage/Current
Delta (difference between cursors)
dV/dt or dI/dt
5. Use the Variable knob to move the
movable cursor(s) left or right.
VARIABLE
Select Units
6. To change the units of the
horizontal position, press H Unit.
Units
S, Hz, % (ratio), ˚(phase)
Phase or Ratio
Reference
7. To set the 0% and 100% ratio or the
0˚ and 360˚ phase references for the
current cursor positions, press Set
Cursor Positions As 100%.
Example
Horizontal
cursors
86
MEASUREMENT
FFT
FFT cursors use different
vertical units. For FFT details,
see page 96.
Cursor
Hor. position, dB/Voltage
Cursor
Hor. Position, dB/Voltage
Delta (difference between cursors)
dV/dt or d/dt
Example
Horizontal
cursors
XY Mode
XY mode cursors measure a number of X by Y
measurements.
Cursor
Time, rectangular, polar coordinates, product, ratio.
Cursor
Time, rectangular, polar coordinates, product, ratio.
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GDS-2000A Series User Manual
Delta (difference between cursors)
Example
Horizontal
cursors
88
MEASUREMENT
Panel Operation/
Range
1. Press the Cursor key twice.
Cursor
x2
2. Press V Cursor from the bottom
menu if it is not already selected.
3. When the V Cursor is selected,
repeatedly pressing the V Cursor
key or the Select key will toggle
which vertical cursor is selected.
OR
Select
Range
Upper cursor movable, lower
cursor position fixed
Lower cursor movable, upper
cursor position fixed
Upper and lower cursor movable
together
4. The cursor position
information appears on the
top left hand side of the
screen.
,
Time: cursor 1, cursor 2
,
Voltage/Current: cursor1, cursor2
Delta (difference between cursors)
dV/dt or dI/dt
Use Vertical Cursors
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GDS-2000A Series User Manual
5. Use the Variable knob to move the
cursor(s) up or down.
VARIABLE
Select Units
6. To change the units of the vertical
position, press V Unit.
Units
Base (source wave units), % (ratio)
Base or Ratio
Reference
7. To set the 0% and 100% ratio
references for the current cursor
position, press Set Cursor Positions
As 100%.
Example
Horizontal
cursors
Vertical
cursors
FFT
FFT has different content. For
FFT details, see page 96.
,
Frequency/Time: cursor1, cursor2
,
dB/V: cursor1, cursor2
Delta (difference between cursors)
d/dt
90
MEASUREMENT
Example
Horizontal
cursors
Vertical
cursors
XY Mode
XY mode cursors measure a number of X by Y
measurements.
Cursor
Rectangular, polar co-ordinates,
product, ratio.
Cursor
Rectangular, polar co-ordinates,
product, ratio.
Delta (difference between cursors)
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GDS-2000A Series User Manual
Example
Horizontal
cursors
Vertical
cursors
92
MEASUREMENT
Background
Math operation runs addition, subtraction,
multiplication, division, FFT, or certain advanced
math functions for waveform manipulations using
the input signals or reference waveforms (Ref1~4)
and shows the result on the display. The resulted
waveform characteristics can be measured using
the cursors.
Addition (+)
Adds the amplitude of two signals.
Source
CH1~4, Ref1~4
Subtraction (–)
Extracts the amplitude difference between two
signals.
Source
CH1~4, Ref1~4
Multiplication (×)
Multiplies the amplitude of two signals.
Source
CH1~4, Ref1~4
Division (÷)
Divides the amplitude of two signals.
Source
CH1~4, Ref1~4
FFT
Runs FFT calculations on a signal. Four types of
FFT windows are available: Hanning, Hamming,
Rectangular, and Blackman.
Source
CH1~4, Ref1~4, f(x)
d/dt
Differentiate the source waveform.
Source
CH1~4, Ref1~4, f(x)
∫dt
Integrate the source waveform with respect to
time.
Source
CH1~4, Ref1~4, f(x)
Math Operation
Overview
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GDS-2000A Series User Manual
√
Performs a square root calculation.
Source
CH1~4, Ref1~4, f(x)
Hanning FFT
Window
Frequency resolution
Good
Amplitude resolution
Not good
Suitable for....
Frequency measurement on
periodic waveforms
Hamming FFT
Window
Frequency resolution
Good
Amplitude resolution
Not good
Suitable for....
Frequency measurement on
periodic waveforms
Rectangular FFT
Window
Frequency resolution
Very good
Amplitude resolution
Bad
Suitable for....
Single-shot phenomenon
(this mode is the same as
having no window at all)
Blackman FFT
Window
Frequency resolution
Bad
Amplitude resolution
Very good
Suitable for....
Amplitude measurement on
periodic waveforms
Panel Operation
1. Press the Math key.
M
MATH
2. Press the Math key on the lower
bezel.
Addition/Subtraction/Multiplication/Division
94
MEASUREMENT
3. Select Source 1 from the side menu
Range
CH1~4, Ref~4
4. Press Operator to choose the math
operation.
Range
+, -, ×, ÷
5. Select Source 2 from the side menu.
Range
CH1~4, Ref~4
6. The math measurement result appears on the
display. The vertical scale of the math
waveform appears at the bottom of the screen.
From left: Math function, source1, operator,
source2, Unit/div
Example
Math
Source 2
Source 1
Position and Unit
To move the math waveform
vertically, press the Position key from
the side menu and use the Variable
knob to set the position.
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GDS-2000A Series User Manual
Range
–12.00 Div ~ +12.00 Div
To change the unit/div settings, press
Unit/div, then use the Variable knob to
change the unit/div.
The units that are displayed depend
on which operator has been selected,
and whether the probe for the selected
channel has been set to voltage or
current.
Operator:
Unit/div:
Multiplication
Division
Addition/Subtraction
VV, AA or W
V/V, A/A
V or A
Turn Off Math
To turn off the Math result from the
display, press the Math key again.
M
MATH
Panel Operation
1. Press the Math key.
M
MATH
2. Press FFT from the bottom menu.
3. Select the Source from the side
menu.
Range
CH1~4, Ref~4, f(x)*
*the f(x) source is set in the advanced math
function, page 100.
FFT
96
MEASUREMENT
4. Press the Vertical Units key from
the side menu to select the vertical
units used.
Range
Linear RMS, dBV RMS
5. Press the Window key from the side
menu and select the window type.
Range
Hanning, Hamming, Rectangular,
and Blackman.
6. The FFT result appears. For FFT, the horizontal
scale changes from time to frequency, and the
vertical scale from voltage/current to dB/RMS.
Source
Math
Position and
Scale
To move the FFT waveform vertically,
press Vertical until the Div parameter
is highlighted and then use the
Variable knob.
Range
–12.00 Div ~ +12.00 Div
To select the vertical scale of the FFT
waveform, press Vertical until the dB
or voltage parameters are highlighted
and then use the Variable knob.
Range
2mV~1kV RMS, 1~20 dB
97
Zoom and Offset
To zoom into the FFT waveform, press
Zoom until the x times parameter is
highlighted and then use the Variable
knob.
Range
1x ~ 20x
To horizontally offset the FFT
waveform, press Zoom until the
frequency parameter is highlighted and
then use the Variable knob.
Clear FFT
To clear the FFT result from the
display, press the Math key again.
M
MATH
Advanced Math
Background
The advanced math function is used to perform a
number of advanced math functions such as
differentiation or integration of a source
waveform.
The f(x) source function (as used in the FFT
function) can also be set from the advanced menu.
Panel Operation
1. Press the Math key.
M
MATH
2. Press Advanced Math from the
bottom menu.
3. Select the Operator from the side
menu.
Range
d/dt, ∫dt, √
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98
MEASUREMENT
4. Select the Source from the side
menu.
Range
CH1~4, Ref~4, f(x)*
*the f(x) source is set with the Edit F(x)
function, page 100.
5. The math result appears. For the
differential/integral operations, the unit/div
scale changes accordingly.
Advanced Math
Source
Position and Unit
To move the math waveform
vertically, press Position and use the
Variable knob.
Range
–12.00 Div ~ +12.00 Div
To select the vertical scale of the math
waveform, press Unit/div and use the
Variable knob.
Clear Advanced
Math
To clear the advanced math result
from the display, press the Math key
again.
M
MATH
99
Edit F(x)
Background
The f(x) source is a user-defined math function that
can be used as a source waveform for the FFT or
advanced math functions. The f(x) source
waveform is created by the addition, subtraction,
multiplication or division of two input waveforms.
Panel Operation
1. Press the Math key.
M
MATH
2. Press Advanced Math from the
bottom menu.
3. Press the Edit f(x) key to edit the
f(x) waveform.
4. Select Source 1 from the side menu
Range
CH1~4
5. Press Operator to choose the math
operation.
Range
+, -, ×, ÷
6. Select Source 2 from the side menu.
Range
CH1~4
7. The f(x) source waveform is now
set, press Go Back to return to the
Advanced Math menu.
GDS-2000A Series User Manual
100
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