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Handheld Digital

USER MANUAL

ISO-9001 CERTIFIED MANUFACTURER

Storage Oscilloscope

with DMM

GDS-200 and GDS-300 Series

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.

SAFETY INSTRUCTIONS

Table of Contents

SAFETY INSTRUCTIONS ................................................... 5

GETTING STARTED ......................................................... 10

GDS-200 and GDS-300 Series Overview 12

Appearance .......................................... 15

Initial Setup ......................................... 30

OPERATION .................................................................... 37

Gesture Control ................................... 41

Common Menu UI Elements ................ 47

Vertical Menu Operation ...................... 50

Trigger Menu Operation ....................... 66

Trigger Setting ..................................... 68

Run Mode ............................................ 80

Cursor Measurements .......................... 83

Automatic Measurements .................... 87

Drop-Down Menu ................................ 95

Utility Menu ......................................... 97

Acquire Menu .................................... 108

Display Menu ..................................... 113

Go-NoGo Menu ................................. 119

Save Operations ................................ 125

Recall Operations .............................. 136

File Manager ...................................... 140

DMM Mode ....................................... 144

EE APPs ............................................. 155

REMOTE CONTROL CONFIG ......................................... 166

Interface Configuration ...................... 167

FAQ ............................................................................... 173

GDS-200 & GDS-300 Series User Manual

APPENDIX ..................................................................... 175

Firmware Update ............................... 177

Fuse Replacement .............................. 178

Resistor Standards ............................. 179

GDS-200/300 Default Settings ........... 182

GDS-200/300 Specifications ............... 183

GDS-200/300 Dimensions .................. 188

Declaration of Conformity .................. 189

INDEX ............................................................................ 190

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 instrument or to other properties.

DANGER High Voltage

Attention Refer to the 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.

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 instrument.

Safety Guidelines

General Guideline

CAUTION

 Do not place any heavy object on the

instrument.

 Avoid severe impact or rough handling that

leads to damaging the instrument.

 Do not discharge static electricity to the

instrument.

 Use only mating connectors, not bare wires, for

the terminals.

 Do not block the cooling fan opening.

 Do not disassemble the instrument unless you

are qualified.

 Do not use sharp objects or press with undue

force on the touch screen display.

 Do not apply more than 300Vrms (CAT II, DSO

inputs); 600V (CAT II, DMM inputs) or 300V (CAT III, DMM inputs).

(Measurement categories) EN61010-1:2010, EN61010-2-030 and EN61010-2-033 specify the measurement categories and their requirements as follows. The GDS-200/300 falls under category II & III.

 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 0 is for measurements performed on

circuits not directly connected to Mains.

GDS-200 & GDS-300 Series User Manual

SAFETY INSTRUCTIONS

AC Adapter Power Supply (AC Mains)

WARNING

 AC Input voltage range: 100VAC-240VAC

 Frequency: 47Hz-63Hz

 Output: 12 DCV, 36W Max

 To avoid electrical shock connect the protective

grounding conductor of the AC power cord to an earth ground.

Power Supply (DC)

 DC Input voltage range (10.5-13.5 V DC, 3A)

Cleaning the Instrument

 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 material

such as benzene, toluene, xylene, and acetone.

Operation Environment

 Location: Indoor, no direct sunlight, dust free,

almost non-conductive pollution (Note below)

 Relative Humidity: 20%- 85%

 Altitude: < 2000m

 Temperature: 0°C to 50°C

(Pollution Degree) EN 61010-1:2010 specifies the pollution degrees and their requirements as follows. The instrument 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.

GDS-200 & GDS-300 Series User Manual

Storage environment

 Location: Indoor

 Temperature: -25°C to 70°C

 Relative Humidity: <90%

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.

Battery

 Type: Rechargeable Li-ion polymer

 Model: FT8862103P

 Manufacturer: Chinese Precision Technology

(Assembled in China)

 Rating: 7.4Vdc

⎓

, 6100mAh (45 Watt)

Battery Caution

 The internal battery should not be replaced by

the end-user. Please return the unit back to your local dealer for assistance.

 Never allow the battery to come in contact with

fire or water.

 Discard used batteries according to the

manufacturer’s instructions or local laws.

 Read the manual before use.

SAFETY INSTRUCTIONS

Green/ Yellow:

Earth

Blue:

Neutral

Brown:

Live (Phase)

Power cord for the United Kingdom

When using the instrument 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.

GDS-200 & GDS-300 Series User Manual

GETTING STARTED

This chapter will allow you to quickly set up a GDS-200 or GDS-300 series oscilloscope and run over the basic operation and features.

Before you can get started, you will need to check the package contents (standard accessories, page

14). After the contents are checked the Overview section will describe all the major features and functions of the oscilloscopes in the GDS-200 and GDS-300 series. The Appearance section will go over the front, rear and side panels of the instrument. The Display Overview will give a brief introduction to the display and how the display changes depending on the current function, orientation or mode. Lastly the Getting Started section will explain how to turn on the instrument, explain how to set up the instrument, and go over the gestures and operating conventions that are used with the capacitive touch panel on the unit.

GETTING STARTED

GDS-200 and GDS-300 Series Overview ........................... 12

Series Lineup ............................................................................................................ 12

Main Features ........................................................................................................... 12

Accessories ................................................................................................................ 14

Appearance ..................................................................... 15

GDS-200/300 Front Panel ..................................................................................... 15

Rear Panel ................................................................................................................. 17

Interface Panel .......................................................................................................... 18

BNC Panel ................................................................................................................ 20

Display Overview ..................................................................................................... 21

Horizontal ................................................................................................... 21

Vertical ......................................................................................................... 22

How to Use the Touch Interface ........................................................................... 25

Help Menu ................................................................................................................ 28

Initial Setup .................................................................... 30

Power Up .................................................................................................................. 30

USB Driver Installation .......................................................................................... 31

Tilting the Stand ....................................................................................................... 32

Setting the System Date & Time ........................................................................... 33

Setting the Language ............................................................................................... 34

Switching Horizontal and Vertical View............................................................... 34

Compensating a Probe ............................................................................................ 34

GDS-200 & GDS-300 Series User Manual

Model name

Bandwidth

Memory depth

DMM Resolution

Temperature measurement

GDS-207

70MHz

1M points per channel

3½

GDS-210

100MHz

GDS-220

200MHz

GDS-307

70MHz

5M points per channel

4½

Yes

GDS-310

100MHz

GDS-320

200MHz

Performance

 1 G Sa/s sampling rate max

 70/100/200MHz bandwidth

 Acquisition memory: 5Mpts for GDS-300 series;

1Mpts for GDS-200 series

 Max 300Vrms (CAT II, DSO); 600V (CAT II) or

300V (CAT III) for DMM

 30,000 Waveforms can be replayed

GDS-200 and GDS-300 Series Overview

Series Lineup

There are 6 models in the series, divided by DSO bandwidth, DSO memory depth, DMM digit resolution and the DMM temperature function.

Note: Throughout the user manual, when we are referring to any of the models generically, we will write “GDS”, “GDS-200” or “GDS300”, unless explicitly stated otherwise.

Main Features

Features

 Simultaneous DMM and DSO operation

 Portrait and landscape modes

 Large 800 x 480 TFT panel and capacitive touch

panel

 7.4V/6100mAH battery for up to 4 hours

operation

 Support for differential probes

 Handy APPs – EE calculator, Resistance

calculator, Attenuation calculator

 Shielded BNC terminals

 DSO Features

 X-Y mode

 Go/No Go

 36 automatic measurement functions

 Trend plot

 Edge, Alt, Video and Pulse trigger functions

 FFT, FFTrms, +, -, /, * math functions

 Replay function

 DMM Features

 50,000 counts

 DCV, DCA, ACV, ACA, R, Diode, Continuity,

Temperature

 Fuse protection for the current ports

Interface

 Mini-B USB device port

GETTING STARTED

Accessories

Standard Accessories

Part number

Description Certificate of calibration

User manual CD

GAP-001

AC-DC adapter

GTP-150B-2

150MHz Probe. for GDS-207 /307, GDS-210 /310

GTP-250B-2

250MHz Probe. for GDS-220 /320

GTL-207

Multimeter test lead x1

GSC-010

Soft carrying case (large)

GSC-011

Protection bag (small)

GWS-001

Wrist strap

Optional Accessories

Part number

Description

GDP-040D

Dual-channel Differential Probe, Only for GDS-200/300

GTL-253

Type A - Mini-B USB cable

GCL-001

Vertical Calibration cable

GPF-700

Protective film for LCD screen

Download

Name

Description

dso_vpo.inf

USB driver

GDS-200 & GDS-300 Series User Manual

GETTING STARTED

COMA mA

GDS-220

Digital Storage Oscilloscope

200 MHz 1GSa/s

FUSED

10A MAX

FUSED

CAT II600mA MAX 600V CAT III 300V

Display

COM port

Current ports

BNC inputs

Interface

panel

port

V W

Display

Color LCD screen, 800 x 480, capacitive touch.

Interface Panel

The interface panel holds a number of different interfaces such as the input power socket, USB device port and the options power port. See page 18 for details.

Appearance

GDS-200/300 Front Panel

GDS-200 & GDS-300 Series User Manual

DMM Ports

10A MAX

FUSED

COMA mA

CAT II 600V CAT III 300VFUSED

600mA MAX

Accepts up to 600mA. Fuse protection: 1A.

Accepts up to 10A. Fuse protection: 10A

COM

Com port

Voltage, Resistance and Diode port.

Max voltage: 600V

Rear Panel

Horizontal stand

Vertical stand

Vent

Do not block the vent opening.

Vertical Stand

Use the vertical stand to position the unit vertically.

Horizontal Stand

Use the horizontal stand to use the unit horizontally.

GETTING STARTED

Interface Panel

Power input for options

Calibration output

Power switch

Internal use ports (restricted access)

USB device port

12V input port

Power Switch

Power switch to turn the unit on or off.

DC input. This port is used for charging the internal lithium battery. Accepts power from the supplied AC-DC power adapter.

Input Voltage: 10.5V - 13.5V Input Current: At least 3.5A.

USB Device Port

Mini-B USB device port. This port is used access the internal 120MB flash memory. When connected to a PC, the GDS-200/300 will be recognized as an external hard disk.

Calibration Port

The calibration port is used to output a 2Vpk-pk 1kHz square wave for probe calibration purposes.

Internal Use Port

This panel houses two ports that are for internal use only. Use of these ports are restricted and not for enduser use.

GDS-200 & GDS-300 Series User Manual

GETTING STARTED

External Power Port.

This port supplies power for optional accessories such as the differential probe option (GW part number: GDP-040D

Voltage output: 5V Current output: 250mA

BNC Panel

CH2 inputTapped holeCH1 input

MW16.5pF 300Vrms MAX.

1 2

CAT 300V

CH1, CH2 Inputs

Channel 1 and channel 2 BNC inputs.

Input impedance: 1MΩ Input Capacitance: 16.5pF Max voltage: 300V max (CAT II)

Tapped Hole

The tapped hole is used to secure the differential probe option to the GDS-200/300. See the differential probe manual for details.

GDS-200 & GDS-300 Series User Manual

GETTING STARTED

Battery indicator, trigger level, and horizontal position

Input frequency, trigger state.

Date, time and horizontal position indicator

Drop down menu area

Channel indicators

Vertical scale

Horizontal scale

Trigger mode

Measurement and DMM menu

Hardcopy button

Run mode

Autoset

Gesture control menu

Trigger indicator

Display Overview

Horizontal

Vertical

In order: Input frequency, trigger state, time, horizontal position, acquisition mode, trigger level, battery indicator.

Horizontal position indicator

Drop down menu area

Channel indicators

Vertical scale

Horizontal scale

Trigger mode

Run mode Autoset

Gesture control menu

Trigger indicator

Hardcopy

DMM measurement

Automatic measurements

Input Frequency

Displays the triggered signal frequency.

Trigger State

Indicates the trigger state: Trig’d (triggered) Stop <2Hz

Date and Time

Displays the date (horizontal only) and time. See page 33 to set the time.

Horizontal Position

Shows the horizontal position.

Acquisition Mode

Displays the acquisition mode (Sample, Peak Detect, Average)

GDS-200 & GDS-300 Series User Manual

GETTING STARTED

Horizontal Window Indicator

Shows the current horizontal scale and position in relation to the record length.

Drop Down Menu Area

Tapping anywhere in the title bar will trigger the drop down menu.

Gesture Control Menu

The gesture control menu allows you to configure whether the touch gestures control the input waveforms or the cursors. This menu will also turn the cursor display on or off.

Channel Indicators

The channel indicator shows the vertical position of each active channel.

Trigger Indicator

Selects the trigger input channel and selects the trigger source.

Vertical Scale

Shows the vertical scale of each active channel. Indicates whether any of the reference or math channels are activated.

Horizontal Scale

Indicates the horizontal scale and the sampling rate.

Trigger Mode

Shows and configures the trigger settings.

Automatic Measurements

Shows the automatic measurements. The automatic measurements can be minimized or hidden when used in the horizontal mode.

DMM Measurements

Shows the DMM measurements. When in the horizontal view the DMM measurements can be minimized or even hidden.

Hardcopy Key

The Hardcopy key is used as a quick-save key either for image screenshots, waveforms, setup files or all of the above.

GDS-200 & GDS-300 Series User Manual

Run Mode (Backward, Run/Stop, Forward, Single)

The Run/Stop key is used to start/stop acquiring samples. The Forward/Backward keys step backward/forward through each consecutively sampled waveform. The Single key puts the trigger into single mode.

Autoset

The Autoset function automatically configures the panel settings to position the input signal to the best viewing condition.

GETTING STARTED

Background

Unlike other oscilloscopes or digital multimeters, the GDS-200 and GDS-300 Series have no physical hardware keys, therefore operation is completely controlled using the capacitive touch screen. Using a capacitive touch screen is a new interface paradigm for DSOs; the gestures and general user interface is easier to use and more intuitive than traditional DSO interfaces. Before you begin to use these instruments, we highly recommend you take a few moments to get to know the basic gestures and interface conventions.

Basic Gestures

There are a few basic gestures that can be used to operate the GDS-200/GDS-300. When asked to perform a gesture throughout the user manual, you can refer to the gestures below.

Tap / Press

Tap/Press once to select an item.

The gesture will be recognized after you lift your finger off the display.

Long Press / Tap & Hold

Tap & hold

Press and hold an item until a submenu system or secondary option appears.

How to Use the Touch Interface

GDS-200 & GDS-300 Series User Manual

Swipe

Horizontally swipe on the screen.

Scroll

Drag your finger vertically on the screen to scroll.

Pinch In

Pinch the screen to zoom out (make the waveforms smaller), or spread your fingers apart to zoom in (make the waveforms larger).

Pinch Out

GETTING STARTED

Drag and drop

Drop

Drag

Drag an item to an option and let go*.

*The drag and drop gesture is usually used in the Horizontal, Vertical or Trigger menu to manually set a positional value.

Help Menu

Background

If at any time you are not sure how to use a particular function, the help icon can be used to put an overlay on the screen to show the basic function of each icon.

Steps

Tap the title bar on the top of the LCD display to bring up the Drop Down menu.

Tap on the Utility icon.

GDS-200 & GDS-300 Series User Manual

GETTING STARTED

Tap on the Help option in the Utility menu.

The help screen overlay is shown on the display. There are three help screens. Use the

numbered icons, , , , to view the corresponding help screen. Use the exit icon

to exit from the help screen.

GDS-200 & GDS-300 Series User Manual

Requirements

Before the unit is powered up for the first time, it is recommended that the unit is first fully charged.

Steps

1. Plug the AC-DC power pack into the mains

outlet.

2. Connect the 12V plug into the 12V socket on the

interface panel of the GDS-200/300.

3. The unit will begin charging. An orange battery

indicator light indicates charging, while green indicates charged.

Battery

indicator

4. Slide the power switch to

the ON position, located on the interface panel.

5. The unit will turn on in a short while.

Initial Setup

This chapter should be used to set up the instrument when used for the first time or if the firmware has been updated.

Power Up

GETTING STARTED

6. The battery indicator is shown on the top

right-hand corner of the main display.

Background

The GDS-200/300 has a USB device driver that should be installed to get the most out of the unit.

Installation

1. Turn off the GDS-200/300.

2. When the PC is on, connect the USB cable from

the GDS-200/300 to the PC.

3. Turn the GDS-200/300 on.

4. Access the Menu tray by pressing the title bar.

Go to Utility>USB device port and set the device port to Communication.

5. The PC will now recognize the unit as a new

device and ask to search for the driver.

6. Direct the driver installation wizard to the USB

device driver (dso_vpo.inf) on the User Manual CD.

USB Driver Installation

GDS-200 & GDS-300 Series User Manual

7. The GDS-200/300 will now be recognized as a

virtual com port (VCP).

Horizontal

To tilt the stand horizontally, pull the catch from the smaller of the two stands.

Pull this catch

Vertical

To tilt the stand vertically, release the catch from the larger of the stands.

Pull this

catch

Tilting the Stand

GETTING STARTED

Background

The GDS-200/300 will keep the date and time settings saved so long as the battery is not allowed to fully discharge.

1. Access the Menu tray by tapping the title bar.

2. Press Utility>System>Date&Time.

The Date&Time menu will appear.

3. To set the date, press Date and use the number

picker to set the year, month and day.

4. To set the time, press Time and use the number

picker to set the hour and minute.

5. Press OK to save the date and time settings.

Note

The date and time settings only remain saved if the battery is not fully drained. However, if the unit shuts down due to insufficient battery power, there will usually still be enough battery power to keep the internal clock running for sometime.

Setting the System Date & Time

GDS-200 & GDS-300 Series User Manual

Background

The GDS-200/300 menu system can be set to display a number of languages.

1. Access the Menu tray by tapping the title bar.

2. Press Utility>System>Language.

The Language menu will appear.

3. To set the language, press your preferred

language.

Background

By default the GDS-200/300 is set to the vertical view.

Switch View

1. Tap the title bar to access the Menu tray.

2. Press the icon to toggle between horizontal

and vertical view.

Background

To demonstrate connecting the probes, we will use the 1kHz calibration signal on the interface panel and compensate the probe from this signal.

Connection

1. Connect a probe to the CH1 BNC terminals.

Setting the Language

Switching Horizontal and Vertical View

Compensating a Probe

GETTING STARTED

2. Set the probe attenuation to x10 on the probe.

3. Connect the probe to the 2V calibration signal.

The calibration signal outputs a 1kHz, 2Vpp square wave signal.

COMA mA

FUSED

10A MAX

FUSED

CAT II600mA MAX 600V

CAT III 300V

CH1

4. Press the vertical icon.

5. Select CH1, if it is not already selected.

6. Press the option icon.

7. Press Probe and set the probe to 10X.

8. Exit from the Vertical menu (tap anywhere

outside the Vertical menu).

9. Press the Autoset button on the bottom

corner of the screen.

10. The calibration signal is displayed on the

screen.

11. Tap the title bar to access the Menu tray.

12. Press Display>Type and select Vector as the

GDS-200 & GDS-300 Series User Manual

interpolation type.

13. Turn the adjust point on the probe until the

probe is properly compensated.

Under

Compensation

Normal

Over

Compensation

OPERATION

Gesture Control ............................................................... 41

Select a Channel, Math or Reference Waveform ................................................. 41

Set the Vertical Position of the Selected Waveform ........................................... 42

Set the Vertical Scale of the Selected Waveform ................................................. 43

Set the Horizontal Position .................................................................................... 44

Set the Horizontal Scale .......................................................................................... 45

Select the Trigger Source and the Trigger Level .................................................. 46

Common Menu UI Elements ............................................ 47

Radio Check Boxes .................................................................................................. 47

Toggle Switches........................................................................................................ 47

Sliding Scales............................................................................................................. 47

Value Picker .............................................................................................................. 48

Keyboards and Keypads ......................................................................................... 48

Vertical Menu Operation ................................................. 50

Vertical Icon Overview ........................................................................................... 50

Entering the Vertical Menu .................................................................................... 51

Channel or Reference/Math Waveform Selection and Activation ................... 51

Vertical Scale and Position ..................................................................................... 52

Vertical Options – Channel .................................................................................... 53

Vertical Options – Reference Waveforms ............................................................ 56

Vertical Options – Math ......................................................................................... 56

Horizontal Position ................................................................................................. 59

Horizontal Expansion ............................................................................................. 60

Zoom ......................................................................................................................... 63

Trigger Menu Operation .................................................. 66

Trigger Icon Overview ............................................................................................ 66

Entering the Trigger Menu ..................................................................................... 67

Trigger Setting ................................................................. 68

Trigger Types ............................................................................................................ 68

OPERATION

GDS-200 & GDS-300 Series User Manual

Trigger Parameters and Settings ............................................................................ 69

Trigger Mode ............................................................................................................ 71

Forced Trigger .......................................................................................................... 72

Alternate Trigger ...................................................................................................... 72

Trigger Level ............................................................................................................ 73

Edge Trigger ............................................................................................................. 74

Pulse Trigger ............................................................................................................. 76

Video Trigger ........................................................................................................... 77

Autoset ...................................................................................................................... 78

Run Mode ....................................................................... 80

Run/Stop and Single Key Overview ..................................................................... 80

Run/Stop Mode ....................................................................................................... 81

Single Mode .............................................................................................................. 82

Cursor Measurements ..................................................... 83

Using Cursors ........................................................................................................... 83

Automatic Measurements ................................................ 87

Measurement Types ................................................................................................. 87

Viewing Automatic Measurements ........................................................................ 90

Selecting an Automatic Measurement ................................................................... 91

Automatic Measurement Options ......................................................................... 93

Drop-Down Menu ............................................................ 95

Opening the Drop-down Menu ............................................................................. 95

Return to Default Settings ...................................................................................... 95

Panel Lock ................................................................................................................ 96

Utility Menu .................................................................... 97

Accessing the Utility Menu ..................................................................................... 97

Set the Language ...................................................................................................... 97

View System Information ....................................................................................... 98

Signal Path Compensation ...................................................................................... 99

Setting the System Date & Time ......................................................................... 100

Touch Sounds ........................................................................................................ 101

Erase Memory ........................................................................................................ 101

Configure the Hardcopy Function ...................................................................... 101

Configure USB Device Port ................................................................................. 103

Configure Autoset Mode ...................................................................................... 104

Set Ruler .................................................................................................................. 105

Calibration .............................................................................................................. 106

OPERATION

Acquire Menu ................................................................. 108

Accessing the Acquisition Menu .......................................................................... 108

Select Acquisition Mode ....................................................................................... 109

Show Waveform in XY Mode ............................................................................. 110

Set the Record Length ........................................................................................... 111

Set the Interpolation .............................................................................................. 112

Display Menu ................................................................. 113

Accessing the Display Menu ................................................................................ 113

Display the Waveform as Dots or Vectors ........................................................ 113

Set the Level of Persistence .................................................................................. 114

Set the Waveform Intensity .................................................................................. 115

Set the Graticule Intensity .................................................................................... 116

Set the Graticule Type ........................................................................................... 117

Set the Brightness Level ........................................................................................ 118

Go-NoGo Menu .............................................................. 119

Accessing the Go-NoGo Menu ........................................................................... 119

Configuring the Go-NoGo Menu ....................................................................... 119

Running a Go-NoGo Test ................................................................................... 123

Save Operations ............................................................. 125

Accessing the Save Menu ...................................................................................... 125

Saving and Configuring Image Files .................................................................... 126

Saving and Configuring Waveform Files ............................................................ 129

Saving and Configuring Setups ............................................................................ 132

Saving and Configuring Images, Waveforms and Setups All at Once ............ 134

Recall Operations ........................................................... 136

Accessing the Recall Menu ................................................................................... 136

Recalling Waveform Files ..................................................................................... 136

Recalling Setups ..................................................................................................... 139

File Manager .................................................................. 140

Accessing the File Manager .................................................................................. 140

Navigating the File System ................................................................................... 141

DMM Mode .................................................................... 144

Accessing the Multimeter ..................................................................................... 144

Multimeter Display Overview .............................................................................. 146

AC/DC Voltage Measurement ............................................................................ 146

GDS-200 & GDS-300 Series User Manual

Current Measurement ........................................................................................... 147

Resistance Measurement ....................................................................................... 149

Diode Measurement .............................................................................................. 150

Continuity Measurement....................................................................................... 152

Temperature Measurement................................................................................... 153

EE APPs ......................................................................... 155

Accessing the EE Apps ........................................................................................ 155

Attenuator Calculator ............................................................................................ 156

Advanced DMM .................................................................................................... 157

Calculator ................................................................................................................ 160

QR Code Link App ............................................................................................... 161

Resistance Calculator ............................................................................................. 161

OPERATION

Note

The gestures described below are only applicable if

“Waveform” is selected as the gesture control method.

See page 83 for details.

Background

Any channel, math waveform or reference waveform that has already been turned on can be selected from the left of the grid. See page 51 to turn on a waveform, math function or waveform.

Steps

To select the active waveform, tap the desired channel, math or reference indicator.

When selected, the icon will become a solid triangle.

Example

Selected

waveform

Gesture Control

This chapter will go over all of the basic touch gestures that are available using the default settings. The touch gestures cover all the most frequently used operations that an engineer uses, allowing the GDS-200/300 to operate completely without panel keys or knobs.

Select a Channel, Math or Reference Waveform

GDS-200 & GDS-300 Series User Manual

Background

The touch screen can be used to conveniently set the vertical position of the selected waveform.

Steps

Swipe the screen vertically to set the vertical position of the selected waveform.

The vertical position will also be shown in a popup window.

The waveform will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

Tapping the upper or lower part of the screen will also increase/decrease the vertical position.

Example

Set the Vertical Position of the Selected Waveform

OPERATION

Background

The touch screen can be used to conveniently set the vertical scale of the selected waveform. To set other vertical scale options, see from page 53

Steps

Pinch in/out vertically to set the vertical scale of the selected waveform.

A scale indicator will popup to show the current scale in relation to full vertical scale range.

When the scale indicator appears, simply tapping the upper or lower half of the screen will also change the vertical scale.

The vertical scale (as a value) is shown in the bottom left-hand side of the display.

Example

Scale Indicator

Vertical Scale

Set the Vertical Scale of the Selected Waveform

GDS-200 & GDS-300 Series User Manual

Background

The touch screen can be used to conveniently set the horizontal position.

Steps

Swipe the screen horizontally to set the horizontal position of the displayed waveforms.

The horizontal indicator is a solid orange triangle at the top to the grid.

The horizontal position (as a value) is shown at the top of the grid.

The waveform will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

Example

Horizontal

position indicator

Horizontal Position

Set the Horizontal Position

OPERATION

Background

The touch screen can be used to conveniently set the horizontal scale of the displayed waveforms. To set other horizontal scale options, see page 60.

Steps

Pinch in/out horizontally to set the horizontal scale of the display.

A scale indicator will popup to show the current scale in relation to full horizontal scale range.

When the scale indicator appears, simply tapping the left or right-half of the screen will also change the horizontal scale.

The horizontal scale (as a value) is shown in the bottom left-hand side of the display.

Example

Horizontal

indicator

Horizontal

Scale

Set the Horizontal Scale

GDS-200 & GDS-300 Series User Manual

Background

The touch screen can be used to conveniently select the trigger source as well as set the trigger level.

Select Trigger Source

Tap on the trigger level indicator to toggle between trigger sources.

Toggle trigger

source

Set the Trigger Level

Swipe the screen to the right of the grid to set the trigger level with the currently selected source.

The trigger level will also be shown in a popup window.

Example

Trigger

Level

Select the Trigger Source and the Trigger Level

OPERATION

Background

A radio checkbox allows a single option to be selected.

Example

Selected in

checkbox

Background

Toggle switches are used to turn options on or off.

Example

Off position On position

Background

Sliders are used to quickly enter a value, on a sliding scale. They are usually accompanied by some common preset value buttons.

Common Menu UI Elements

This section will give a brief overview of some of the common UI elements that are used to select parameters and values in menus. Not all of the UI elements look the same but will have similar functions. User interface elements that are not shown below will be specifically shown in the user manual.

Radio Check Boxes

Toggle Switches

Sliding Scales

Example

Slider

Preset value button

Value Picker

Background

Value pickers are used to enter discrete values. They are usually accompanied by some common preset value buttons.

Example

Decrease value

Current value

Preset value

button

Increase value

Background

Software keyboards and keypads are used to enter specific values. Keyboards are used to enter letters and numbers, such as making text notes or files names. Keypads are used to enter values, such as the horizontal position.

GDS-200 & GDS-300 Series User Manual

Keyboards and Keypads

OPERATION

Example: keypad

Units

keypad

Delete Enter

When using a keypad:

 Select the unit  Enter the value using the keypad  Press Enter to confirm the entered value.

Example: Keyboard

Text entry

area

OKEnter

Alphanumeric/Language/

symbol toggle

When using the keyboard:

 The text entry area will display the text

that is entered.

 The +=# key will bring up a symbol

keyboard

 The ABC/Language key will bring up the

alphanumeric or native language keyboard.

 Press Enter to go to the next line.  Press OK to finish entering the text.

GDS-200 & GDS-300 Series User Manual

Channel

status

Coupling

Vertical scale

Bandwidth

limit status

Invert status

Reference

indicator

Math

indicator

Item

Description

Channel Status

Indicates if a channel is turned on.

Coupling

Indicates DC, AC or GND coupling.

Vertical Scale

Indicates the vertical scale.

Bandwidth Limit Status

Indicates the bandwidth limit is turned on for that channel.

Invert Status

Indicates that the channel waveform is inverted.

Reference Indicator

Indicates that either R1 or R2 is turned on. Math Indicator

Indicates that the Math function is turned on.

Vertical Menu Operation

The vertical menu controls the vertical scale and position, channel activation, coupling, expansion modes and probe settings.

Vertical Icon Overview

Major settings that have been set in the vertical menu will be reflected in the Vertical icon.

OPERATION

Steps

1. Press the vertical icon to bring up the vertical

menu.

2. The Vertical Menu appears.

Vertical Menu

Vertical icon

Turning a Channel On

From the vertical menu press the icon of the desired channel, reference waveform or math waveform to turn the channel on or to select the channel as the active channel.

 When activated the channel icon will be

colored.

 The active channel will have an orange

ring around the channel icon.

 Channels that are turned off will be

grayed-out.

Entering the Vertical Menu

Channel or Reference/Math Waveform Selection and Activation

GDS-200 & GDS-300 Series User Manual

Example

Activated channels

Selected/active channel Disabled channels

Background

The vertical scale and position can be configured in the vertical menu in addition to the using the touch gestures.

Touch Control

Select the desired channel, reference waveform or math function.

Page 41

Note

Position: When using touch control, the waveform will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

Menu Control

1. Use the scale picker to set the vertical scale for

the selected channel.

2. Use the position slider to set the vertical

position for the selected channel.

3. To set the vertical position to 0, drag from the

Vertical Position key and drop to the “Set to 0” option.

4. To manually set the vertical position, drag from

the Vertical Position key and drop to the keyboard icon. Type in the value for the vertical position with the keypad that appears.

Vertical Scale and Position

OPERATION

Scale

picker

Vertical

Position key

Position

slider

Drag and drop the

Vertical position key to manually

set vertical

position

Background

The Options menu in the Vertical menu allows you to set the coupling, invert waveforms, turn the bandwidth limit on, set the expansion mode and set the probe attenuation.

Setup

1. Select a channel by tapping on the

corresponding channel icon.

Page 51

2. Press the Options icon to bring up the

vertical options.

The vertical options for the selected channel/waveform will be displayed.

Coupling

1. Press Coupling to set the coupling for the

selected channel.

2. Choose the coupling type in the Coupling

menu that appears.

Vertical Options – Channel

GDS-200 & GDS-300 Series User Manual

Coupling

DC, AC, GND

Invert

Press the Invert toggle switch to invert the waveform for the selected channel.

Bandwidth Limit

Press the Bandwidth Limit toggle switch to turn the bandwidth limit on or off.

Bandwidth limit

20MHz, Off

Expand

When the voltage scale is changed, the Expand function designates whether the signal expands from the center of the signal or from the signal ground level. Expand by Center can be used to easily see if a signal has a voltage bias. Expand by Ground is the default setting.

1. Press the Expand key to set the expand mode

for all the displayed waveforms.

2. Choose the expansion type in the Expand menu

that appears.

Expand

By Center, By Ground

Example

Expand by Ground

Expand by ground

Expand by Center

Expand by center

OPERATION

Note

If the vertical scale is changed when the Expand function is set to ground, the signal will expand from the ground level. The ground level position does not change when the vertical scale is changed.

If the vertical scale is changed when the Expand function is set to center, the signal will expand from the center of the waveform window. The ground level position will suit to match the signal position.

Probe

This menu sets the probe attenuation and the probe type.

Press Probe and set the probe parameters for the chosen channel in the Probe menu that appears.

Probe Type

Voltage, Current

Probe attenuation

0.001X - 1000X (1-2-5 step resolution)

10X (preset)

Probe

type

10X presetAttenuation

GDS-200 & GDS-300 Series User Manual

Background

The Options menu in the Vertical menu allows you to view the selected reference waveform sample rate, record length and creation date.

Setup

1. Select a reference by tapping on the

corresponding R1 or R2 icon.

Page 51

2. Press the Options icon to bring up the

vertical options.

The data for the selected reference waveform will be displayed.

Note

The reference waveforms can only be recalled if they have been saved first.

Selected reference waveform

Reference waveform

information

Background

When Math (M) is selected, the Options menu in the Vertical menu allows you to set the math mode, source operators, units and windowing function.

Vertical Options – Reference Waveforms

Vertical Options – Math

OPERATION

Setup

1. Select the math channel by selecting

the M icon.

Page 51

2. Press the Options icon to bring up the math

settings.

Math waveform selected

Math settings

Math

1. Press the Math tab to reveal the math options.

2. From the Math tab select the sources and the

math operator.

Source 1 Operator Source 2

CH1, CH2, Ref1, Ref2 +, - , ×, ÷ CH1, CH2, Ref1, Ref2

FFT

1. Press the FFT tab to reveal the FFT math

options.

2. From the FFT tab select the source, units and

FFT window function.

Source 1 Operator Window

CH1, CH2, Ref1, Ref2 dBV RMS, Linear RMS Hanning, Rectangular, Hamming, Blackman

GDS-200 & GDS-300 Series User Manual

Example

Math waveform icon

Math waveform

Math details

The Math icon can be expanded to show the sources, volt/div and offset of the Math function. Press the Math icon to toggle between the collapsed and expanded Math icon.

Vertical scale Math sources

Offset

Collapsed Expanded

Background

The horizontal scale and position can be configured in the Horizontal menu in addition to the using the touch gestures.

Menu Control

1. Press the

Horizontal key to access the

Horizontal menu.

2. Press Main to set the scope to the main window

mode.

Horizontal menu

Horizontal icon

Horizontal scale

Horizontal position

Main window mode

3. From the Main horizontal menu the horizontal

scale and position can be configured.

4. Use the scale picker to set the horizontal scale.

5. Use the position slider to set the horizontal

position.

6. To set the horizontal position to 0, drag from

the Horizontal Position key and drop to the “Set to 0” option.

OPERATION

Horizontal Position

GDS-200 & GDS-300 Series User Manual

7. To manually set the horizontal position, drag

from the Horizontal Position key and drop to the keyboard icon. Type in the value for the horizontal position with the keypad that appears.

Scale

picker

Position

slider

Drag and drop the

Horizontal

Position key to

manually set the

horizontal position

Horizontal

Position key

Touch Control

1. Swipe the screen to set the horizontal

position.

Page 44

2. Use a pinch gesture to increase or

decrease the horizontal scale.

Page 45

Note

Position: When using the touch screen to set the horizontal position, it will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

Background

The Options menu in the Horizontal/Zoom menu allows you to set the horizontal expansion mode.

There are two horizontal expansion options: By Center and By Trigger Position.

By Center

Scales the waveform from the center of the display.

Horizontal Expansion

OPERATION

By Trigger Position

Scales the waveform from the trigger position.

Steps

1. Access the Horizontal or Zoom

menu.

Page 59 or 63

2. Press the Options icon to bring up the

Horizontal options menu.

The expansion settings will be displayed.

Horizontal options menu

Expand settings

3. Choose the expansion type in the Expand menu

that appears.

Expand

By Center, By Trigger Position

Example: By Center

Expand By Center

Trigger position

GDS-200 & GDS-300 Series User Manual

Example: By Trigger Position

Expand By Trigger

Trigger Position

Zoom

Background

The Zoom menu can be accessed from the Horizontal menu.

Setup

1. Press the

Horizontal key to access the

Horizontal menu.

2. Press Zoom to set the scope to Zoom window

mode.

Horizontal menu

Horizontal icon

Zoom scale

Zoom position

3. From the Zoom horizontal menu the zoom scale

and zoom position can be configured.

OPERATION

GDS-200 & GDS-300 Series User Manual

Menu Control

1. Use the scale picker to set the horizontal scale

for the zoom window.

2. Use the position slider to set the horizontal

position for the zoom window.

3. To set the zoom position to 0, drag from the

Zoom Position key and drop to the “Set to 0”

option.

4. To manually set the zoom position, drag from

the Zoom Position key and drop to the keyboard icon. Type in the value for the zoom position with the keypad that appears.

Scale

picker

Position

slider

Drag and drop the

Zoom Position

key to manually

set the zoom

position

Zoom

Position key

Touch Control

1. The zoom window can be zoomed in and out

using a horizontal pinch.

OPERATION

2. The horizontal position of the zoom window

can be moved by swiping the screen left or right.

Zoom horizontal position

Zoom window

Note

Position: In the main display, the zoom window will automatically snap to the zero position at each crossing. To move past the zero position, use the swipe gesture again.

GDS-200 & GDS-300 Series User Manual

Trigger source

Slope, polarity

or condition

Trigger

coupling

Noise

rejection

Alternate

trigger indicator

High/Low

frequency

rejection

Item

Description

Trigger Source Shows the trigger source channel.

CH1, CH2

Trigger Coupling Shows the trigger coupling.

AC Coupling, DC Coupling

Noise Rejection

Indicates that noise rejection is activated

Frequency rejection Indicates that high or low frequency rejection is activated.

HFR = high frequency rejection LFR = low frequency rejection

Alternate trigger indicator

Indicates that the alternate trigger is activated.

Slope, polarity or condition

This area will display the current trigger conditions:

Edge

Rising slope, Falling slope, Either slope

Pulse

Falling edge, Rising edge

Video

NTSC, PAL, SECAM

Trigger Menu Operation

The Trigger menu controls the trigger position, trigger type and trigger modes.

Trigger Icon Overview

The settings that have been set in the Trigger menu will be reflected in the Trigger Menu Icon.

OPERATION

Steps

1. Press the Trigger icon to bring up the

Trigger menu.

2. The Trigger menu appears.

Example

Trigger menu

Trigger icon

Trigger

Settings

Entering the Trigger Menu

GDS-200 & GDS-300 Series User Manual

Edge

The edge trigger is the simplest trigger type. An edge trigger triggers when the signal crosses an amplitude threshold with either a positive or negative slope.

Rising edge trigger

Falling edge trigger

Pulse Width

Triggers when the pulse width of the signal is less than, equal, not equal or greater than a specified pulse width.

Pulse width

Video

Extracts a sync pulse from a video format signal, and triggers on a specific line or field.

Trigger Setting

Trigger Types

The trigger configures the conditions for when the GDS-200/300 captures a waveform.

OPERATION

Mode

Auto

The GDS-200/300 generates an internal trigger if there is no trigger event, to make sure waveforms are constantly updated regardless of trigger events. Select this mode especially when viewing rolling waveforms at slower timebases.

Normal

The GDS-200/300 only acquires a waveform when triggered.

(Single)

Pressing the Single button will acquire a single waveform. (This mode is not selectable from the Trigger menu. See page 82 for details)

Force Trigger

This setting will force a trigger to be generated when pressed. This setting is useful if triggering a waveform is difficult.

ALT

Alternates the source between channel 1 and channel 2.

Trigger level

Level

Used to manually adjust the trigger level for the current source.

TTL (1.4V)

Sets the trigger level to 1.4V, suitable for triggering on TTL signals.

ECL (-1.3V)

Sets the trigger to -1.3V. This is suitable for ECL circuits.

Trigger Parameters and Settings

The following trigger parameters apply to all the trigger types unless stated otherwise.

GDS-200 & GDS-300 Series User Manual

50%

Sets the trigger level to 50% of the waveform amplitude.

Source

CH1, CH2

Channel 1 or channel 2 input.

Coupling (Edge, Pulse only)

Sets the coupling to DC.

Sets the coupling to AC.

Slope (Edge only)

Rising

Trigger on rising edge.

Falling

Trigger on falling edge.

Either

Trigger on either rising or falling edge.

Reject

Off

Frequency rejection turned off.

LFR

Low frequency rejection.

HFR

High frequency rejection.

Noise rejection

Holdoff

Sets the holdoff time. The holdoff time delays triggering the next waveform for a set amount of time after triggering.

Polarity (Pulse)

Positive polarity

Positive polarity (triggered on the high to low transition)

Negative polarity

Negative polarity (triggered on the low to high transition)

Polarity (Video)

Positive polarity

Positive polarity.

Negative polarity

Negative polarity.

Trigger When (Pulse)

Equal to.

Longer than.

Shorter than.

≠

Not equal to.

When

Pulse width (10ns - 10s)

Standard

NTSC

National Television System Committee

PAL

Phase Alternate by Line

SECAM

SEquential Couleur A Memoire

Trigger On

Field1

Sets the trigger point to a line on field1 (odd).

Field2

Sets the trigger point to a line on field2 (even).

All Fields

Trigger on all fields.

All Lines

Trigger on all lines.

Trigger Mode

Background

The trigger mode can be set to Normal or Auto (untriggered roll). The triggering mode applies to all the trigger types. See page 69.

From the Trigger menu, set the Mode to Auto or Normal.

OPERATION

GDS-200 & GDS-300 Series User Manual

Background

If the input waveforms are not triggered, they can be force triggered using the Force Trigger button.

From the Trigger menu, press the Force Trigger button. The scope will trigger immediately.

Background

The Alternate trigger allows the scope to trigger alternatively between CH1 and CH2.

From the Trigger menu, press the ALT button. A check will indicate if the ALT function is active. The ALT function applies to all the trigger types.

Forced Trigger

Alternate Trigger

OPERATION

Background

The trigger level can be set using touch gestures or from the trigger level.

Touch Control

1. Select the trigger source from the side of the

graticule.

2. Swipe up and down from the right side of the

graticule to set the trigger level for the selected trigger source.

Menu Control

1. From the Trigger menu use the Trigger Level

slider to set the trigger level.

2. To set the trigger level to 50%, drag from the

Trigger Level button and drop to the “Set to 50%” option.

3. To manually set the trigger level, drag from the

Trigger Level button and drop to the keyboard icon. Type in the value for the trigger level with the keypad that appears.

Drag and drop the

Trigger Level

button to

manually set the

trigger level

Trigger Level

button

Trigger Level

Edge Trigger

Background

The Edge trigger allows you to acquire a waveform on a rising or falling edge.

Setup

1. Press the Edge button.

Page 67

2. Press the Options icon to bring up the

Trigger options for the Edge trigger.

Edge Trigger

Return Source

Coupling

Slope Rejection

Level

Holdoff

3. Select the appropriate parameters. See page 69

for a description of each parameter.

Source

CH1, CH2

Coupling

DC, AC

Slope

Rising, falling, either

Reject

Off, low frequency rejection, high frequency rejection, noise rejection

Level

0.00V, TTL(1.4V), ECL(-1.3V), 50%

Holdoff

10ns - 10s

GDS-200 & GDS-300 Series User Manual

OPERATION

Example

Pulse Trigger

Background

The Pulse trigger allows you to acquire a waveform on a rising or falling pulse of a defined width.

Setup

1. Press the Pulse button.

Page 67

2. Press the Options icon to bring up the

Trigger options for the Pulse trigger.

Pulse trigger

Return Source

Coupling

Polarity

Rejection

Trigger

When Holdoff

Trigger level

3. Select the appropriate parameters. See page 69

for a description of each parameter.

Source

CH1, CH2

Coupling

DC, AC

Polarity

Positive, negative

Reject

Off, low frequency rejection, high frequency rejection, noise rejection

Level

0.00V, TTL(1.4V), ECL(-1.3V), 50%

Trigger When

Equal, greater than, less than, not equal to. (Time: 10ns - 10s)

Holdoff

10ns - 10s

GDS-200 & GDS-300 Series User Manual

Example

Video Trigger

Background

The Video trigger allows you to acquire PAL, NTSC and SECAM video signals. The GDS200/300 can trigger on any line or field.

Setup

1. Press the Video button.

Page 67

2. Press the Options icon to bring up the

Trigger options for the Video trigger.

Video trigger

Return Source

Standard

Polarity Trigger On

Holdoff

3. Select the appropriate parameters. See page 69

for a description of each parameter.

OPERATION

GDS-200 & GDS-300 Series User Manual

Source

CH1, CH2

Standard

NTSC, PAL, SECAM

Polarity

Positive, negative

Trigger On

Field 1 (line 1- 263), Field 2 (line 1 -

262), All Field, All Lines

Level

0.00V, TTL(1.4V), ECL(-1.3V), 50%

Holdoff

10ns - 10s

Example

Background

The Autoset function will automatically choose the best timebase and vertical scale for the activated waveforms. The Fit Screen and AC Priority settings position the input signal to the best viewing condition.

Note

Note the Autoset function is only applicable when the input is equal or greater than 30mV & 20Hz.

Autoset Settings

Descriptions

Fit Screen

Fit Screen mode will fit the waveform to the best scale, including any DC components (offset).

Autoset

OPERATION

AC Priority

AC Priority mode will scale the waveform to the screen by removing any DC component.

Steps

1. From the main display press the

Autoset key.

2. The waveform will appear on the display.

3. For a few seconds you will have the option to

press Undo? to undo the autoset configuration.

Autoset Mode

1. Long press Autoset to bring up the Autoset

Mode menu.

2. Press the appropriate check-box to select Fit

Screen or AC Priority.

Note

The Autoset Mode menu can also be accessed via the Utility menu, see page 104 for details.

GDS-200 & GDS-300 Series User Manual

Step forward

Run/Stop key Single key

Progress bar

Record indicator

Step backward

Item

Description

Record Indicator

The Record indicator blinks when the scope is triggering.

Progress Bar

The Progress bar indicates the record progress.

Step Forward

Steps to the next captured waveform when the scope is in Stop mode.

Step Backward

Steps to the previous captured waveform when the scope is in Stop mode.

Run/Stop Key

Toggles the scope between Run and Stop mode.

Single Key

Turns on the Single Trigger mode.

Run Mode

The scope has three main running modes, Run, Stop and Single.

Run mode continuously captures (triggered) waveforms in a FIFO buffer. Each waveform that is captured can be replayed when the scope is in the Stop mode. The number of waveforms that are captured depends on the sample rate and the memory length.

Stop mode stops capturing waveforms and allows you to view any waveform that was previously captured in the Run mode.

Single mode captures a single waveform as soon as the trigger conditions are met.

Run/Stop and Single Key Overview

The Run/Stop key shows the Run/Stop status, the record progress of the captured waveforms and the navigation keys for navigating captured waveforms when in the Stop mode.

OPERATION

Background

By default the scope is in Run mode as soon as it is turned on.

The Run/Stop key is shown in green when the scope is in Run mode and red when it is in Stop mode.

Toggle Modes

Press the Run/Stop key to toggle between Run and Stop modes.

Record Navigation

1. Put the scope into Run mode (described above).

2. After the desired number of samples has been

recorded, toggle the scope to Stop mode by pressing the Run/Stop key.

3. Use the Backward and Forward keys to

navigate to the desired waveform sample.

4. When the Backward or Forward keys are used a

slider will appear allowing you to quickly navigate to the desired sample. The slider will disappear after a short while of inactivity.

5. The slider can be pinned/unpinned from the

menu bar by toggling the pin icon.

Sample number/ Sample size

Sample slider

Pin/Unpin icon

Run/Stop Mode

Example

Sample slider

Sample number

Trigger status

Single Mode

Simply press the

Single key to set the

scope to single trigger mode.

The scope will capture a waveform when the trigger conditions are met. This is useful for intermittent signals.

GDS-200 & GDS-300 Series User Manual

OPERATION

Background

The Gesture Control icon is used to toggle the touch screen controls between Waveform controls and Cursor controls. The Cursor Display must be activated to use and see the cursor measurements.

Steps

1. Press the Gesture Control icon, located in the

top corner of the graticule.

Gesture

Control

2. Set the Gesture Control to Horizontal or

Combined Cursor control.

3. Turn Cursor Display on.

Cursor Measurements

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 or combined) are activated, they will be shown on the main display unless turned off.

Using Cursors

GDS-200 & GDS-300 Series User Manual

4. Cursors will now appear on the display for the

currently selected channel, 2 lined cursors for the Horizontal Cursor option and 4 lined cursors for the Combined Cursor option.

5. The cursor measurements will appear in a

window in the top left-hand side.

Horizontal:

Cursor 1, 2

Time/frequency, voltage/current at crossing. Delta (difference between cursors) dV/dt or dI/dt.

Combined:

□ , ○

Time/Frequency: Cursor 1, cursor 2

Cursor 1, 2

Voltage/Current : Cursor 1, cursor 2 Delta (difference between cursors) dV/dt or dI/dt.

OPERATION

6. Pressing the cursor window will toggle the

horizontal reading between frequency and time.

Cursor

Reading

Moving the Cursors

7. To move the cursors horizontally, touch and

swipe a cursor line horizontally to the desired position.

8. To move the cursors vertically, touch and swipe

a cursor line vertically to the desired position.

Horizontal

cursor

Vertical

cursor

9. Return the Gesture Control back to Waveform

after the cursors have been positioned. See step 3 above to turn Gesture Control off.

GDS-200 & GDS-300 Series User Manual

Linking the Cursors

10. To link the distance between the cursors (lock

the delta value) so that the horizontal cursors or vertical cursors move together, press and hold either Horizontal Cursor or Combined Cursor in the Gesture Control window as shown in step 4.

The Horizontal Cursor and Combined Cursor options will show a “link” icon on the left-hand side when the cursors are linked.

Press and hold to link the

horizontal or vertical cursors

OPERATION

Amplitude Measurements

Pk-Pk

Difference between positive and negative peak. (=max − min)

Max

Positive peak.

Min

Negative peak.

Amplitude

Difference between the global high value and the global low value, measured over the entire waveform or gated region. (=high − low)

High

Global high voltage.

Low

Global low voltage.

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.

Automatic Measurements

Up to 4 automatic measurements can be calculated from the trigger configuration conditions each time a waveform is captured.

The automatic measurements can be based on the entire record length, the area of the waveform displayed on-screen or from a gated region bound by the onscreen cursors.

Measurement Types

GDS-200 & GDS-300 Series User Manual

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.

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 Measurements

Frequency

Frequency of the waveform.

Period

Waveform cycle time. (=1/Freq)

Rise Time

The time required for the leading edge of the first pulse to rise from the low reference value to the high reference value.

Fall Time

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.

OPERATION

–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.

-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.

GDS-200 & GDS-300 Series User Manual

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.

Phase

The phase difference of two signals, calculated in degrees.

360x

Background

There are two different display options for automatic measurements. A minimized and a maximized view*.

The minimized view will display the real-time measurement results.

The maximized view will display the real-time, mean, minimum and maximum measurement results.

Note

*The minimized view is only applicable in the landscape viewing mode. The vertical viewing mode displays automatic measurements in the maximized view by default and will always be displayed on screen.

Viewing Automatic Measurements

OPERATION

Steps

1. Press the M (Measure) icon in the menu bar at

the bottom of the display.

2. The minimized view will appear above the

menu bar.

3. To toggle between the minimized and

maximized view, tap anywhere within the area that the automatic measurements are displayed.

4. To remove the automatic measurements from

the display*, press the M (Measure) icon again in the menu bar.

Measure icon

Automatic measurement

area (minimized shown)

Background

Automatic measurements can be accessed from the drop down menu or from the menu bar at the bottom of the screen.

Selecting an Automatic Measurement

GDS-200 & GDS-300 Series User Manual

Steps

1. Make sure the automatic measurements are

visible at the bottom of the display.

2. From the Menu Bar: Long-press anywhere

within the area that the automatic measurements are displayed to bring up the Measurement menu.

From the Drop Down Menu: Press the top of the screen to access the drop down menu. From the Menu tray, select the Measure icon.

Long press

Measure

icon

3. Select a measurement slot (from 1 of 4

quadrants).

4. Select a measurement category (Amplitude,

Time, Delay).

OPERATION

5. Select an automatic measurement from the

selected category.

Tip: Tapping the bottom of the selection window will display the next group of automatic measurements for the category.

6. To select the source for the selected automatic

measurement, long-press the measurement selection. Select the source from the submenu that appears.

Source

Measurement

selection

Measurement slots

Measurement

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Specifications and Main Features

Frequently Asked Questions

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