Digital &

GDS-122

USER MANUAL GW INSTEK PART NO.

March 2012 edition This manual contains proprietary information, which is protected by copyrights. All rights are reserved. No part of this manual may be photocopied, reproduced or translated to another language without prior written consent of Good Will company.

The information in this manual was correct at the time of printing. However, Good Will continues to improve products and reserves the rights to change specification, equipment, and maintenance procedures ISO-9001 CERTIFIED MANUFACTURER at any time without notice.

Windows is a registered trademark of Microsoft Corporation in the United States and other countries. Good Will Instrument Co., Ltd. No. 7-1, Jhongsing Rd., Tucheng Dist., New Taipei City 236, Taiwan TABLE OF CONTENTS GDS-122 User Manual

Viewing in X-Y format ...... 47 Viewing signal peaks ...... 48 Viewing noisy signals...... 49 TABLE OF CONTENTS Viewing variations in a signal...... 50 Calibration ...... 51 Safety Instructions...... 6 Running the self calibration ...... 51 Running the probe calibration...... 52 Getting Started...... 9 Saving/Recalling Waves and Settings ...... 53

Package Contents ...... 10 Recalling the default settings ...... 5338H Main Features...... 11 Saving waveforms ...... 5439H Recalling waveforms ...... 5540H Front Panel and Keys Overview ...... 12 Menu Tree / Operation Shortcuts ...... 5641H Manual Overview ...... 14 Trigger ...... 5642H

CH1/CH2 Setup ...... 5643H

Using the Oscilloscope...... 15 Measurement Setup 1/2...... 5744H Basic Operations...... 16 Wave Math ...... 5745H

46H 1. Powering up the GDS-122...... 16 Cursor Measurement...... 57

47H 2. Connecting an input signal ...... 17 Acquisition Mode ...... 58

48H 3. Using the Autoset function...... 18 Time Mode...... 58

49H 4. Introducing the display contents ...... 19 Function ...... 58

50H 5. Adjusting scales...... 20 Display ...... 58

51H 6. Adjusting waveform positions...... 21 Wave Save ...... 59 System Status ...... 5952H Configurations ...... 22 OSC OPTION key ...... 6053H Configuring channel (vertical) settings ...... 22

54H Configuring horizontal settings...... 25 Using the Software ...... 61

55H Configuring trigger settings: general settings ...... 27 Installing the software ...... 62

56H Configuring trigger settings: edge triggering ...... 30 Modifying/Reinstalling/Uninstalling the software...... 64

57H Configuring trigger settings: triggering ...... 33 Activating the software and connecting the GDS-122 .. 65

58H Selecting the acquisition mode...... 35 Configuring the screen ...... 68

59H Configuring display settings ...... 36 Viewing the waveforms ...... 71

60H Viewing the system status...... 37 Using the cursor measurements...... 75

Saving waveforms ...... 7761H Measurements ...... 39 Recalling waveforms ...... 7962H Running waveform maths...... 39 Printing out waveforms ...... 8063H Running automatic measurements ...... 41 Accessing the Help ...... 8264H Running time cursor measurements...... 42 Running cursor measurements ...... 43

65H Advanced Viewings ...... 45 Using the Multimeter...... 83

Zooming waveforms horizontally ...... 45 Activating the Multimeter ...... 8466H

3 4 TABLE OF CONTENTS GDS-122 User Manual

Measuring Voltage ...... 85 Measuring Current ...... 87 Measuring Impedance ...... 8969H AFETY NSTRUCTIONS Measuring ...... 9170H S I

Measuring Continuity ...... 9271H This chapter contains important safety instructions Measuring ...... 9372H that you should follow when operating the instrument and when keeping it in storage. Read the following before any operation to ensure your 73H Faq...... 95 safety and to keep the instrument in best condition.

Safety Symbols Specifications...... 9774H These symbols may appear in this manual or on the instrument. Oscilloscope specifications ...... 9775H Multimeter specifications ...... 9876H Warning: Identifies conditions or practices that

77H General specifications ...... 99 WARNING could result in injury or loss of life. Caution: Identifies conditions or practices that 78H Declaration of Conformity ...... 100 CAUTION could result in damage to the instrument or to other properties.

Index...... 10179H DANGER: High Voltage

Attention: Refer to the Manual

Protective Conductor Terminal

Earth (ground) Terminal

Safety Guidelines

General • Do not place heavy objects on the instrument. Guidelines • Avoid severe impacts or rough handlings that may damage the instrument. CAUTION • Avoid discharges of static electricity onto or near the instrument. • Do not insert bare wires or metal objects into the terminals. • Do not apply input voltage more than 42V peak (30Vrms) to the instrument.

5 6 Safety Instructions GDS-122 User Manual

• Do not perform measurements at a power Occasionally, however, a temporary conductivity caused by condensation generating source or building installation site must be expected. Pollution degree 3: Conductive pollution occurs, or dry, non-conductive (see note below). pollution occurs which becomes conductive due to condensation which • The instrument should only be disassembled is expected. In such conditions, equipment is normally protected against by a qualified technician. exposure to direct sunlight, precipitation, and full wind pressure, but neither nor humidity is controlled. (Measurement categories) EN 61010-1:2001 specifies the measurement Storage • Location: Indoor categories and their requirements as follows. This instrument falls under category I. Measurement category IV is for measurement performed at environment • Relative Humidity: < 75% the source of low-voltage installation. Measurement category III is for • measurement performed in the building installation. Measurement Temperature: −10°C to 70°C category II is for measurement performed on the circuits directly connected to the low voltage installation. Measurement category I is for Power cord for the United Kingdom measurements performed on circuits not directly connected to Mains. When using the instrument in the United Kingdom, make sure the Power Supply • AC Input voltage: 100 to 240V, 50/60Hz power cord meets the following safety instructions. • The power supply voltage should not fluctuate more than 10%. NOTE: This /appliance must only be wired by competent persons WARNING WARNING: THIS APPLIANCE MUST BE EARTHED • Always use the AC adaptor included in the IMPORTANT: The wires in this lead are coloured in accordance with the following code: package. Green/ Yellow: Earth Blue: Neutral • Always connect the AC adaptor to the mains Brown: Live (Phase) line first, then to the instrument. As the colours of the wires in main leads may not correspond with the colours marking identified in your plug/appliance, proceed as follows: Cleaning the • Disconnect the power cord before cleaning the The wire which is coloured Green & Yellow must be connected to the Earth terminal marked with the instrument instrument. letter E or by the earth symbol or coloured Green or Green & Yellow. The wire which is coloured Blue must be connected to the terminal which is marked with the letter N or • Use a soft cloth dampened in a solution of mild coloured Blue or Black. detergent and water. Do not spray liquid into The wire which is coloured Brown must be connected to the terminal marked with the letter L or P or the instrument. coloured Brown or Red. If in doubt, consult the instructions provided with the equipment or contact the supplier. • Do not use chemicals or cleaners containing This cable/appliance should be protected by a suitably rated and approved HBC mains : refer to the harsh products such as benzene, toluene, rating information on the equipment and/or user instructions for details. As a guide, cable of 0.75mm2 xylene, and acetone. should be protected by a 3A or 5A fuse. Larger conductors would normally require 13A types, depending on the connection method used. Operation • Location: Indoor, no direct sunlight, dust free, Any exposed wiring from a cable, plug or connection that is engaged in a live socket is extremely most non‐conductive pollution (see note below) hazardous. If a cable or plug is deemed hazardous, turn off the mains power and remove the cable, any Environment fuses and fuse assemblies. All hazardous wiring must be immediately destroyed and replaced in • Relative Humidity: < 75% accordance to the above standard. • Altitude: < 2000m • Temperature: 0°C to 40°C

(Pollution Degree) EN 61010-1:2001 specifies the pollution degrees and their requirements as follows. This 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.

7 8 Getting Started GDS-122 User Manual

Package0B Contents GETTING STARTED Soft carrying case GDS‐122

This chapter gives you an overview of what the GDS‐122 is about, what items are included in the package, and how the user manual is organized. After opening the GDS‐122 package, check the contents referring to the Package Contents section, AC‐DC adaptor Oscilloscope probe x 2 + probe then learn the features and interface reading the adjustment tools Main Features and Front Panel and Keys Overview section. The Manual Overview section gives you an overall picture of what each chapter is about, helping you directly jump to the relevant location.

1kHz square wave output cable Multimeter test lead x 2

Extension module for large Extension module for small current measurement capacitance measurement

Package Contents ...... 1080H USB cable CD‐ROM Main Features...... 1181H (software) Front Panel and Keys Overview ...... 1282H

Manual Overview ...... 1483H

User Manual RS‐232C communication cable

(this document) (optional item – contact Good Will)

9 10 Getting Started GDS-122 User Manual

Main1B Features Front2B Panel and Keys Overview

Oscilloscope • Dual channel AC adaptor USB/RS-232C/Square wave port • 20MHz bandwidth plug • 100MS/s real‐time sampling rate • ≤ 17.5ns rising time Display • 5ns to 5s/div horizontal scale contrast LCD display • 5mV to 5V/div vertical scale • 6k memory points per channel • Isolated inputs between oscilloscope and multimeter F1 - F5 keys OSC OPTION key • Autoset function Power + Arrow keys switch • Trigger mode: Auto, Free run, Single shot, MENU key + A switch Edge, Video Up/Down keys V switch • 2 cursors RUN/STOP key R switch AUTOSET key • 5 automatic measurements DMM/OSC key mA • 4 display image memories terminal Oscilloscope CH1/CH2 • Auto‐calibration terminal Multimeter • , Amps, , Continuity, Diode, Capacitance measurement COM V/ CX terminal terminal terminal • 20A maximum • True RMS measurement DSO : Oscilloscope function DMM : Multimeter function • Isolated inputs between oscilloscope and AC adaptor plug Accepts the AC adaptor cord. DC 8.5V, 1500mA. multimeter USB port Accepts the USB cable for PC connection. Common • USB interface Accepts the optional RS‐232C cable for PC • RS‐232C interface RS-232C port connection. • 1kHz square wave output • 3.8 inch color LCD display, 320 x 240 resolution Square wave Outputs a 1kHz square wave for probe output compensation and other general purposes. • 6 hours running time Li‐ion battery • 180mm x 113mm x 40mm compact size LCD display 3.8 inch, 320 x 240 resolution, color LCD display. • 690g light weight Sets the following parameters: vertical OSC OPTION key DSO + Arrow keys level and scale (page22),84H horizontal level

and scale (page25),85H trigger level (page25),86H

and cursor position (page42).87H

11 12 Getting Started GDS-122 User Manual

MENU key + DSO Activates the side menu and selects the

3B Up/Down keys menu items. Manual Overview

Manually turns on (run) or off (stop) the Overview This user manual is comprised of seven chapters. RUN/STOP key DSO trigger. For details, see page25.88H If you want to jump start using the GDS‐122, go directly to the Using Oscilloscope or Using RUN/STOP key DMM Freezes (stop) or unfreezes (run) the Multimeter chapter. measurement. Safety The Safety Instructions gives you an overview of Automatically selects the horizontal scale, AUTOSET key DSO Instructions important safety‐related issues which you should vertical scale, and trigger level according (page6)99H be aware of before, during, and after operations.

to the input signal. See page1889H for details. Getting Started The Getting Started chapter provides you with the DMM the measurement mode. For (page9)100H overview of the GDS‐122: main features, package details, see page87(current),90H contents, front panel, and user manual (this page85(voltage),91H and page89(impedance).92H section).

DMM/OSC key Switches the operation mode between the Using the The Using the Oscilloscope chapter describes in oscilloscope and multimeter. Oscilloscope detail how to use the GDS‐122’s oscilloscope

(page15)101H functionalities, including the PC software. The Accepts the CH1 and CH2 input signal. CH1/2 terminal DSO chapter starts with simple, basic operations toward more complex measurements and settings. DMM Accepts the test leads for capacitor CX terminal If you are new to the GDS‐122, start with the Basic measurement. Operations section. For advanced users, the Menu Tree / Shortcuts section shows the menu structures V/Ω terminal DMM Accepts the red lead for voltage, small capacitance, and impedance and all operations shortcuts. measurements. Using the The Using the Multimeter chapter describes how to Multimeter use the GDS‐122’s multimeter functionalities. The COM terminal DMM Accepts the black (ground) lead. (page83)102H most commonly used Voltage, Current, and Resistance sections are listed in the front. mA terminal DMM Accepts the red lead for current measurement. Faq The Faq chapter lists major problems you might encounter during operations and how to fix or R switch DMM Selects the following measurement: (page95)103H impedance (page89),93H diode (page91),94H avoid them. Most issues are also listed in the

continuity (page92),95H capacitance (page93).96H relevant chapters throughout the document.

97H Specifications The GDS‐122 specifications are separated in V switch DMM Selects voltage measurements (page85). (page97)104H oscilloscope, multimeter, and general parts. A switch DMM Selects current measurements (page87).98H Declaration of The Declaration of Conformity chapter lists the Power switch Turns on or off the GDS‐122 power. conformity safety and EMI/EMC standards to which the GDS‐

(page100)105H 122 conforms. F1 – F5 keys Selects the menu item at the bottom of the display. Index The Index chapter lists most of the keywords used Disp contrast sw Selects the display contrast. in this manual in an alphabetical order. (page101)106H

13 14 Using the Oscilloscope GDS-122 User Manual

Basic4B Operations

Operation flow The Basic Operations section describes how to set USING THE up the GDS‐122 and observe an input signal, step‐ by‐step. 1. Powering up the GDS‐122 SCILLOSCOPE 2. Connecting an input signal O 3. Using the Autoset / Introducting the display 4. Adjusting the scales This chapter describes the oscilloscope functionalities in the GDS‐122: setting it up and 5. Adjusting the waveform position measuring simple waveforms, using advanced measurement functions, and configuring the Advanced For more advanced or detailed operations, see the system settings. The menu tree section at the end operations following chapters.

gives you an overview of all functionalities and a • Configurations (page22)116H quick access to each of them. For the multimeter • Measurements (page39)117H functionalities, see page83.107H • Advanced Viewings (page45)118H

108H Basic Operations...... 16 • Calibrations (page51)119H

Configurations ...... 22109H

19B Measurements ...... 39110H 1. Powering up the GDS-122

Advanced Viewings ...... 45111H Press the power switch. The welcome 1. Pressing the Calibration ...... 51112H power switch screen with the corporate logo appears on the display. Saving/Recalling Waves and Settings ...... 53113H

Menu Tree / Operation Shortcuts ...... 56114H

Using the Software...... 61115H

Press any key to continue.

To adjust the display brightness, press the switch on the side. The backlight turns on and off.

2. Activating the Press any key (for example the MENU (Example) oscilloscope key) to enter the oscilloscope mode. See the battery level icon at the top left MENU corner of the display and connect the

15 16 Using the Oscilloscope GDS-122 User Manual

power cord if the level is < 25%.

X10 X1

> 75% 75% 50% 25% < 25% CH1

X1 X10 DUT or 400V CAT II CAT 1kHz square wave

X10 X1

Switching the If the multimeter screen appears, DMM/OSC CH2 press the DMM/OSC key and change operation mode the mode to oscilloscope. 3. Setting the 1. After attenuating the probe level by x10, you Tilt standing the Use the bar at the back to display also need to magnify the display level by x10 GDS-122 tilt stand the GDS‐122 on a magnification to match the displayed amplitude with the real horizontal plane. amplitude. Open the CH1 or CH2 SETUP menu by pressing the MENU key and using the Up/Down keys.

2. Select the probe attenuation level (10X) by pressing F3 (Probe) repeatedly. The CH1/CH2 vertical scale indicator at the bottom left corner of the display changes accordingly.

Note If pressing the power switch does not turn on the GDS‐122, the battery may need recharging. CH1 SETUP 10 X MENU Connect the GDS‐122 to the AC adaptor and CH2 SETUP Probe recharge it for at least 15 minutes. F3

2.20B Connecting an input signal 3.21B Using the Autoset function 1. Connecting Connect the probe(s) between the DUT (Device the probe Under Test) and the CH1/2 inputs on the GDS‐122. Overview The Autoset function automatically configures the following parameters according to the input Alternately, you may use the signal. GDS‐122’s own 1kHz square • CH1/CH2 on/off wave output signal. Insert the signal cable (included in the • Vertical scale/level package) to the output terminal. • Horizontal scale/level • Trigger level To prevent excessive input voltage, we 2. Setting the Using the Press the AUTOSET key. The input recommend you to set the probe attenuation level AUTOSET probe Autoset function signal appears in the best display attenuation to the X 10 position to prevent excessive voltage. condition. (Continued on next page)

17 18 Using the Oscilloscope GDS-122 User Manual

5.23B Adjusting waveform scales Example Before After Selecting the Press the OSC OPTION key menu repeatedly until the following menu appears on the display. OSC OPTION – Time Base – CH1 (or CH2) Volts/Div

Vertical scale Horizontal scale 4.22B Introducing the display contents Adjusting the Use the Left/Right key to change the horizontal / Trigger status horizontal scale scale. channel off Horizontal Original center position Trigger level Vertical center position Horizontal scale Adjusting the Use the Up/Down key to change the vertical scale. vertical scale Vertical Original Vertical scale center position

• Updating the signal (auto mode) AUTO Trigger status • The signal is triggered ’ Trig d • Waiting for trigger conditions Ready

• Triggering is stopped STOP

Press the RUN/STOP key to control RUN/STOP trigger on/off (run/stop).

19 20 Using the Oscilloscope GDS-122 User Manual

5B 6.24B Adjusting waveform positions Configurations

Selecting the Press the OSC OPTION key Overview The configuration chapter describes how to menu repeatedly until the following change various GDS‐122 internal parameters for menu appears on the display. OSC allowing better measurement condition. OPTION – Time Configuration • Channel (vertical) settings page22120H – CH1 (or CH2) Zero items • Horizontal settings page25121H

Horizontal • Trigger settings page25122H center • 123H position Acquisition modes page30

• Display settings page36124H

• System status (only for viewing) page37125H Vertical center position Configuring25B channel (vertical) settings

Overview The channel settings configure how the waveform appears in terms of vertical or voltage scale.

Position Sets the vertical position of the Adjusting the Use the Left/Right key to change the horizontal waveform. horizontal position. position Scale Sets the vertical scale (volts per Original graticule). Range: 5mV/div to 5V/div

CH on/off Turns the channel on or off.

Coupling Selects AC or DC coupling. The DC coupling shows all signal elements, while the AC coupling filters out the DC component from the waveform. Adjusting the Use the Up/Down key to change the vertical vertical position position. Inversion Flips the waveform upside down.

Original Magnifica Magnifies the displayed units (does not ‐tion magnify the real signal). The magnification function is useful to align the displayed with probe

attenuation (page17),126H especially X10.

21 22 Using the Oscilloscope GDS-122 User Manual

Setting the 1. Press the OSC OPTION key OFF vertical position repeatedly until the following CH1 SETUP ON menu appears on the display. OSC MENU OPTION Channel – Time CH2 SETUP – CH1 (or CH2) Zero F2

Note that when using the Autoset function

(page18),127H channels are automatically turned on or off. 2. Use the Up/Down key to change the vertical Selecting the 1. Press the MENU key and use the Up/Down position. coupling mode keys to select the CH1(CH2) SETUP menu.

Original 2. Press F1 (Coupling) repeatedly to select DC, AC, or Ground coupling.

DC Ground CH1 SETUP AC MENU Coupling 1. Press the OSC OPTION key CH2 SETUP Setting the F1 vertical scale repeatedly until the following menu appears on the display. OSC OPTION The DC coupling shows both DC and AC – Time Base signal. – CH1 (or 2) Volts/Div The AC coupling only shows the AC signal. The Ground coupling shows the ground line.

DC coupling 2. Use the Up/Down key to change the vertical (center point is at the scale. bottom due to DC offset) Original

AC coupling (center point is at the

middle since the DC Turning the 1. Press the MENU key and use the Up/Down offset is being channel on/off keys to select the CH1(CH2) SETUP menu. removed) 2. Press F2 (Channel) repeatedly to turn on or off the channel. Inverting the 1. Press the MENU key and use the Up/Down channel keys to select the CH1(CH2) SETUP menu. 2. Press F4 (Inverted) to invert the waveform.

23 24 Using the Oscilloscope GDS-122 User Manual

ON CH1 SETUP OFF MENU Inverted CH2 SETUP 2. Use the Left/Right key to change the horizontal F4 position.

Invert off Invert on Original

Selecting the 1. Press the OSC OPTION key repeatedly until the following 1. Press the MENU key and use the Up/Down horizontal scale Selecting the menu appears on the display. OSC magnification keys to select the CH1(CH2) SETUP menu. OPTION – Time Base 2. Press F3 (Probe) repeatedly to select the probe magnification ratio.

1000 X 100 X 10 X 2. Use the Left/Right key to change the horizontal CH1 SETUP 1 X scale. MENU Probe CH2 SETUP F3 Original

Configuring26B horizontal settings

Overview The horizontal settings configure how the waveform appears in terms of horizontal or time scale.

Position Sets the horizontal position of the waveform.

Scale Sets the horizontal scale (time per graticule). Range: 100ms/s to 10s/s

Setting the 1. Press the OSC OPTION key horizontal repeatedly until the following menu appears on the display. OSC position OPTION – Time

25 26 Using the Oscilloscope GDS-122 User Manual

triggering, you have to press the

Configuring27B trigger settings: general settings RUN/STOP key again (in single trigger mode) or switch to another trigger mode. Overview The trigger settings configure how the incoming signal is triggered. The general settings section Horizontal scale vs. trigger status describes how to start and stop triggering, adjust 5ns/div 100ms/div 5s/div the level, and change the trigger mode. Trig’d • For edge triggering details, see page30.128H AUTO Scan • For video triggering details, see page33.129H Ready Status Shows the triggering status in the icon appearing in the upper right corner of STOP the display.

Run/Stop Controls starting and stopping the Run/Stop Pressing the Run/Stop key once stops RUN/STOP trigger. triggering at most situations and STOP changes the trigger icon to STOP. Level Adjusts the vertical and horizontal level on which the waveforms are In the single trigger mode in edge triggering triggered. (page30),132H pressing the RUN/STOP key works as both activating and deactivating trigger. Trigger status The trigger status icon is located at the top right corner of the display. Trigger level Press the OSC OPTION key OSC repeatedly until the following menu OPTION Trig’d The trigger condition is met. appears on the display. AUTO The GDS‐122 is showing the input signal – Time

waveform regardless of trigger – Trig condition. Available in the Auto trigger

mode in edge triggering (page30).130H Trigger level indicators Ready The trigger condition is not met, and the Trigger level GDS‐122 is waiting for the next (horizontal) condition. Available in the Normal

trigger mode in edge triggering (page30).131H

Scan The GDS‐122 is showing the input signal

waveform regardless of trigger condition. The waveform is gradually updated from the left side of the display. The GDS‐122 automatically switches to Trigger level the Scan when the horizontal scale is at (vertical) 100ms/div or longer.

STOP Triggering is stopped regardless of the

trigger condition. In order to restart

27 28 Using the Oscilloscope GDS-122 User Manual

Use the arrow keys to change the triggering position. Configuring28B trigger settings: edge triggering Move the trigger The edge trigger type triggers on the incoming point up Overview signal edge. Use the edge trigger for all signals Move the Move the except for video related ones. trigger point trigger point • For general trigger settings, see page27.133H left right

• For video triggering details, see page33.134H

Move the trigger To select edge triggering, follow these steps. point down 1. Press the MENU key and use the Up/Down Pressing the Up and Down keys to select TRIG MODE menu. key together resets the 2. Press F1 (Type) to select the Edge trigger type. vertical trigger level to zero.

Edge MENU TRIG MODE Pressing the Left and Right TYPE key together resets the F1 horizontal trigger level to zero. Slope Selects the slope, rising or falling, on which the GDS‐122 triggers the input signals.

Source Selects the signal source channel, CH1 or CH2.

Mode Selects the triggering mode, Auto (acquires signal continuously), Normal (acquires signal when trigger conditions are met), and Single (manually triggers the signal).

Coupling Selects the DC or AC coupling and rejection filters: high frequency or low frequency.

Selecting the Press F2 (Slope) repeatedly to Rising trigger slope select the rising or falling slope. Falling Slope

F2 (Continues to the next page)

29 30 Using the Oscilloscope GDS-122 User Manual

Normal mode Example: falling edge In the normal mode, input signals are shown in the display only if the trigger condition is met. Falling edge Triggering point Horizontal scale (/div) 5ns 100ms 5s

Status icon when triggered Trig’d Scan

Status icon when not triggered Ready Scan

Single mode In the single mode, you manually trigger the GDS‐ 122 by pressing the RUN/STOP key each time you need to observe the waveform. Once the waveform is captured, the GDS‐122 stops triggering and waits for the next trigger command.

Horizontal scale (/div) 5ns 100ms 5s Selecting the Press F3 (Channel) repeatedly to select CH2 source channel the trigger source channel, CH1 or CH1 Status icon when triggered STOP STOP CH2. The trigger channel indicator at Source the bottom right corner of the display AUTO changes. F3 Status icon when not triggered Scan Ready

Trigger source Press F5 (Coupling) repeatedly to select channel Selecting the AC coupling mode the trigger coupling. LF Rjc HF Rjc Selecting the Press F4 (Mode) repeatedly to select Auto • AC: triggers only on the AC portion trigger mode the trigger mode. The trigger status Normal of the waveform. DC icon in the upper right corner of the Coupling Single • DC: triggers on the whole waveform display changes accordingly. For the Mode (AC + DC). F5 overview of trigger status in general, F4 • see page27.135H LF Rjc: filters out the lower frequency when triggering. Auto mode • HF Rjc: filters out the higher In the auto mode, input signals are constantly frequency when triggering. acquired and shown in the display regardless of trigger condition.

Horizontal scale (/div) 5ns 100ms 5s

Status icon when triggered Trig’d Scan

Status icon when not triggered AUTO Scan

31 32 Using the Oscilloscope GDS-122 User Manual

Configuring29B trigger settings: video triggering Selecting the Press F3 (Channel) repeatedly to select CH2 source channel the trigger source channel, CH1 or Overview The video trigger type is designed to capture the CH1 video signal format, NTSC, PAL, or SECAM. For CH2. The trigger channel indicator at Source any other signal type, use the edge trigger. the bottom right corner of the display changes. F3

• For general trigger settings, see page27.136H

• For edge triggering details, see page30.137H Trigger source channel To select edge triggering, follow these steps.

1. Press the MENU key and use the Up/Down Selecting the Press F4 (Polarity) repeatedly to select Field keys to select TRIG MODE menu. sync the synchronization point. Line 2. Press F1 (Type) to select the video trigger type. • Line: the video line is used for Sync triggering. F4 • Field: the video field is used for Video MENU TRIG MODE triggering. TYPE F1 Example

Video line trigger Video field trigger Polarity Selects the polarity of synchronization signal. Normal means the black level is low. Invert means the black level is high.

Source Selects the signal source channel, CH1 or CH2.

Sync Selects the part of the video signal used for synchronization: line or field.

Selecting the Press F2 (Polarity) repeatedly to select Inverted trigger polarity the polarity of synchronization signal. Normal • Normal: the black level is low. Polarity

• Inverted: the black level is high. F2 (Continues to the next page)

33 34 Using the Oscilloscope GDS-122 User Manual

Selecting30B the acquisition mode Configuring31B display settings

Overview The acquisition mode specifies how the incoming Overview The display settings configure how the waveforms analog signal is digitally sampled by the GDS‐122. are drawn in the display.

Sample The waveform data is sampled at an vector drawing The vector drawing mode shows equal time interval. The sample the waveform as a smooth line, mode accurately reconstructs the connecting each data point. waveform, but cannot respond to rapid changes and sudden peaks. dot drawing The dot drawing mode shows the waveform as a collection of Peak detect The maximum and minimum data independent data points. in the sampling interval are picked up. The peak detect mode captures persistence The persistence setting sets how rapid changes and sudden peaks, long the old waveforms remain in but the waveform becomes noisy. the display, useful for observing the waveform variations. Average Multiple samples are averaged together. The average mode reduces Panel operations 1. Press the MENU key and use the Up/Down the noise level, but the waveform keys to select the DISP SET menu. must be repetitive. The number of 2. Press F1 (Type) or F2 (Persist) repeatedly to averaging are 4, 16, 64, and 128. select vector drawing, dot drawing, and persistence time. Panel operations 1. Press the MENU key and select the ACQU MODE Infinite menu using the Up/Down MENU ACQU MODE Dots 1/2/5 sec keys. Vectors OFF MENU DISP SET Type Persist F1 F2 2. Select the acquisi‐ Peak Sample Average tion mode from F1 Detect (Sample) to F3 F1 F2 F3 Vector/dot Vector Dot (Average). drawing example

For the Average mode, also 16 press F4 (Averages) repeatedly Averages to select the number of F4 averaging: 4, 16, 64, or 128. Persistence Persistence off Persistence infinite Example Sample Peak detect Average (16) example

35 36 Using the Oscilloscope GDS-122 User Manual

Viewing32B the system status Vertical status (F2) Overview The system status menu shows the GDS‐122 VERTICAL SYSTEM STATUS For details of each item, see the system settings. SCALE CH1 2.00v following pages. SCALE CH2 50.0mv CH1/CH2 scale: page22143H Panel operations 1. Press the MENU key and POSITION CH1 0.00 divs(0.0mv) select the SYS STAT menu POSITION CH2 0.00 divs(0.0mv) CH1/CH2 position: page22144H using the Up/Down keys. MENU SYS STAT COUPLING CH1 DC COUPLING CH2 DC CH1/CH2 coupling: page22145H PROBE CH1 1X

PROBE CH2 1X CH1/CH2 probe: page22146H MATH CH1-CH2 Math mode: page39147H 2. Select the status menu from F1 (Horizontal) to INVERTED CH1 OFF INVERTED CH2 OFF F4 (Misc) and press it. The status information CH1/CH2 invert: page22148H appears in the display. Trigger status (F3): Edge trigger

Horizontal Vertical Trigger Misc TRIGGER SYSTEM STATUS For details of each item, see the following pages. F1 F2 F3 F4 TYPE EDGE SOURCE CH1 Trigger type: page30149H 3. To close the system status SLOPE RISING TRIGMODE SINGLE TRIGGER Trigger source: page30150H screen, select different menus COUPLING DC using the MENU key MENU Trigger slope: page30151H followed by Up/Down keys. Trigger mode: page30152H

Trigger coupling: page30153H

Horizontal status (F1) Trigger status (F3): Video trigger HORIZONTAL SYSTEM STATUS For details of each item, see the TRIGGER SYSTEM STATUS For details of each item, see the following pages. TIME BASE MAIN TIME BASE TYPE VIDEO following pages. MAIN SCALE 1.0ms SOURCE CH1 138H Time base: page25 Trigger type: page33154H WINDOW SCALE 10.us POLARITY NORMAL MAIN POSITION 300.0us 139H Main/window scale: page45 SYNC LINE Trigger source: page33155H WINDOW POSITION 559.60us

140H DISPLAY FORMAT YT Main/window position: page45 Trigger polarity: page33156H ACQUIRE MODE SAMPLE

141H Display format: page47 (XY) Trigger sync: page33157H

Acquire mode: page35142H Misc status (F4) (Continues to the next page) MISC The Misc status shows the serial Series Number number and firmware version. 0739002 Ver 3.0

37 38 Using the Oscilloscope GDS-122 User Manual

Measurements6B

Overview The advanced measurement functions allow you to automatically measure various parameters in a waveform.

Measurement • Waveform math page39158H items • Automatic measurements page41159H

• Time cursor measurement page42160H

• Voltage cursor measurement page43161H

Running33B waveform maths 5. To cancel the math result, press the function key (F1 to F5) again. Overview The waveform math function runs mathematical operations between CH1 and CH2 waveform, and Changing the 1. Press the OSC OPTION key. OSC then shows the result in the display. math result Make sure the following menu OPTION position appears on the display. Math type • CH1 – CH2 (subtract CH2 from CH1) – Time • CH2 – CH1 (subtract CH1 from CH2) – CHM Zero • CH1 + CH2 (add CH1 and CH2) • CH1 * CH2 (multiply CH1 and CH2) 2. Use the arrow keys to move the math result position. • CH1 / CH2 (divide CH1 by CH2)

Panel operations 1. Make sure that both CH1 and CH2 waveforms are shown in the display. Changing the 1. Press the OSC OPTION key OSC 2. Press the MENU key and OPTION math result scale repeatedly until the following select the WAVE MATH menu menu appears on the display. using the Up/Down keys. MENU WAVE MATH – Time Base – CHMath

Volts/Div 3. Select the math operation from F1 (CH1 – CH2) to F5 (CH1 / CH2) and press it. 2. Use the arrow keys to change the math result scale.

CH1-CH2 CH2-CH1 CH1+CH2 CH1*CH2 CH1/CH2

F1 F2 F3 F4 F5 The math result waveform can be saved into or 4. The math result appears in the display Saving or recalled from one of the four GDS‐122 internal (example: adding two square waveforms) recalling the math result memories. See page53162H for details.

39 40 Using the Oscilloscope GDS-122 User Manual

F5 (Cyc). Press it repeatedly to select CH1 or 2.

34B Running automatic measurements Top left f T V Vp Vk corner Overview The automatic measurement function measures the input signal’s characteristics and lists them in Freq Period Mean PK-PK Cyc RMS the top left corner of the display. F1 F2 F3 F4 F5 Source signal CH1, CH2 4. The measurement result appears in the top left corner of the display. Measurement set SET1, SET2

Measurement The following measurement items are available. Running35B time cursor measurements items • Frequency The time cursor function measures and updates • Overview Period the following three types of time difference. • Mean voltage • Between cursor 1 and cursor 2 • Peak‐to‐peak voltage • Between cursor 1 and center (zero) point • Cycle voltage (true RMS) • Between cursor 2 and center (zero) point Panel operations 1. Make sure that the waveform appears. Time cursor 1. Make sure that the waveform appears. panel operations 2. Press the MENU key and 2. Press the MENU key and select the MEAS SET1 or MEAS SET1 select the CURS MEAS menu SET2 menu using the MENU using the Up/Down keys. MENU CURS MEAS Up/Down keys. SET1 and MEAS SET2 SET2 correspond to the results in the upper left

corner of the display. 3. Press F1 (Type) repeatedly to Time select the Time cursor. The Type MEAS SET1 MEAS SET2 cursors appear as vertical F1 purple lines located at the center of the display.

4. Press the OSC OPTION key OSC MEAS SET1 repeatedly until the following OPTION MEAS SET2 menu appears.

– Time

– Cursor 1(or 2) 5. Use the arrow keys to move the cursor or horizontal position. Measurement items

3. Select the measurement type from F1 (Freq) to

41 42 Using the Oscilloscope GDS-122 User Manual

Move the 3. Press F1 (Type) repeatedly to Voltage cursor left select the Voltage cursor. The Type cursors appear as horizontal F1 Move the Move the purple lines located at the horizontal horizontal position right position left center of the display.

4. Press F2 (Source) repeatedly CH1 Move the to select the source channel. Source cursor right F2 Display overview T1 T0 T2 5. Press the OSC OPTION key Cursor (center) Cursor OSC (CH1, cursor 2) repeatedly until the following OPTION menu appears.

– Time

– Cursor V1 (or V2) T2 - T0 time T1 - T0 time 6. Use the arrow keys to move the cursor or T1 - T2 time horizontal position. & frequency Cursor menu Move the cursor up

Move the Move the horizontal OSC horizontal OPTION Running36B voltage cursor measurements position right position left

Overview The voltage cursor function measures and updates Move the the following five types of voltage difference. cursor down • Between cursor 1 and cursor 2 Display overview V1 V2 • Between cursor 1 and CH1 center point Cursor Cursor (CH1, cursor 2) • Between cursor 2 and CH1 center point • Between cursor 1 and CH2 center point • Between cursor 2 and CH2 center point

Source signal CH1 input, CH2 input V2 - center Voltage cursor 1. Make sure the waveform appears. V1 - center panel operations 2. Press the MENU key and |V1 - V2| select the CURS MEAS menu Cursor menu using the Up/Down keys. MENU CURS MEAS

43 44 Using the Oscilloscope GDS-122 User Manual

4. Press the OSC OPTION key OSC

7B Advanced Viewings repeatedly until the Time OPTION Base menu appears. Overview The advanced viewing functions allow you to clearly observe specific type of waveforms and/or – Time particular characteristics in a waveform. – Cursor V1 (or Cursor V2) Viewing items • Waveform zoom page45163H

• X‐Y format page47164H 5. Use the arrow keys to change the zoom width.

• Signal peaks page48165H Zoom out • Noisy signals page48166H vertical scale

• Variations in a signal page49167H Narrow range OSC Wide range OPTION Zooming37B waveforms horizontally

Overview By using the zoom function, you can magnify the Zoom in waveform in the horizontal direction. vertical scale 6. Press F3 (Window) to zoom Panel operations 1. Make sure that the waveform appears in the Window display. into the window. F3 2. Press the MENU key and select the TIME MODE menu Example using the Up/Down keys. MENU TIME MODE

3. Press F2 (Set Window). A set Zone of cursors appears in the Window center of the display. F2

Zoom window

45 46 Using the Oscilloscope GDS-122 User Manual

Viewing38B waveforms in X-Y format Viewing39B signal peaks

Overview The X‐Y format plots the CH1 input as X‐axis and Overview Using the peak detect acquisition mode, the CH2 input as Y‐axis. This display mode is maximum and minimum data in the sampling convenient for viewing the phase relationship interval are displayed, capturing the rapid between CH1 and CH2. changes and sudden peaks that might spontaneously occur in a waveform. Panel operations 1. Make sure that both CH1 and CH2 waveforms appear in the display. Note Since the peak detect mode picks up the most extreme data, the waveform becomes noisier than 2. Press the MENU key and the normal acquisition mode (sampling mode). select the DISP SET menu using the Up/Down keys. MENU DISP SET Panel operations 1. Press the MENU key and use the Up/Down keys to select ACQU MODE menu. 2. Press F2 (Peak Detect) to activate the peak 3. Press F3 (Format) and select XY detect mode. XY. The display mode Format switches into the X‐Y format. F3 Peak MENU ACQU MODE Changing the Press the OSC OPTION key Detect scale and repeatedly to access the menu listed F2 below. In the X‐Y mode, all scales and OSC position OPTION positions are controlled by the For other acquisition settings details, see page30.173H Up/Down keys.

Example • CH1 Zero: horizontal position Peak detect off Peak detect on • CH2 Zero: vertical position • CH1 Vol: horizontal scale • CH2 Vol: vertical scale

Functions not The following functions do not work in the X‐Y applicable in the format. X-Y format • Cursor measurement (page42,168H page43)169H

• Automatic measurement (page41)170H

• Window zoom (page45)171H

• Trigger settings configuration (page25)172H

47 48 Using the Oscilloscope GDS-122 User Manual

Viewing40B noisy signals Viewing41B variations in a signal

Overview Using the Average acquisition mode, you can Overview Using the persistence display function, you can smooth out the displayed waveform by averaging define sets how long the old waveforms remain in multiple data samples. The number of averaging is the display, allowing observation of waveform selectable from 4, 16, 64, and 128. variations. You can select the persistence time from 1, 2, and 5 sec. When choosing the Infinite Note • In order for the average mode to work in the mode, the GDS‐122 keeps all past traces of the best way, the waveform must be repetitive. displayed waveform. • As the number of averaging increases, the slower the waveform update becomes. Panel operations 1. Press the MENU key and use the Up/Down keys to select DISP SET menu. Panel operations 1. Press the MENU key and use the Up/Down 2. Press F2 (Persist) repeatedly to select the keys to select ACQU MODE menu. persistence time.

2. Press F3 (Average) to activate the average Infinite mode. 1/2/5 sec

3. Press F4 (Averages) repeatedly to select the OFF MENU DISP SET number of averaging. Persist

4 F2 128

64 For other display settings details, see page36.175H 16 MENU ACQU MODE Average Averages Example F3 F4 Persistence off Persistence infinite

For other acquisition settings details, see page30.174H

Example

Average off Average 16

49 50 Using the Oscilloscope GDS-122 User Manual

Running43B the probe calibration Calibration8B Overview The attached probe contains a calibration point at Overview The self calibration automatically adjusts the GDS‐ the end to adjust the waveform. 122 internal parameters. The probe calibration adjusts the probe capacitance. You should run Procedure 1. You may use the GDS‐122’s own both whenever using the GDS‐122 in a new 1kHz square wave output environment. signal. Insert the signal cable (included in the package) to the output terminal. Running42B the self calibration

Overview The self calibration function automatically 2. Use the Autoset function to put AUTOSET configures internal parameters to maintain the the waveform in the middle of sensitivity and accuracy. Run the self calibration in the display. the following cases. • When the temperature fluctuates more than 5 degrees during operations • When operating the GDS‐122 in a new benchtop or field environment

Procedure 1. Press the MENU key and select the FUNCTION menu using the Up/Down keys. MENU FUNCTION

2. Press F2 (Autocalibration). A Autoca- message appears on the libration 3. Adjust the probe calibration point to make sure display, asking you to remove F2 that the waveform edge remains flat. all cables and probes from the GDS‐122.

3. After removing all cables, Autoca- press F2 (Autocalibration) libration again. The self‐calibration F2 automatically starts and a message appears, showing that the calibration is Over- Optimum Under- ongoing. compensation compensation 4. When the message disappears in 5 minutes, the

calibration is completed.

To interrupt Press any key during the calibration. calibration

51 52 Using the Oscilloscope GDS-122 User Manual

9B Saving/Recalling Waves and Settings Saving45B waveforms

Overview The GDS‐122 can save or recall four sets of Overview Up to four waveforms can be stored in and waveforms using its internal memory. When you recalled from the GDS‐122 internal memory. The need to reset the system, recall the default (factory stored waveform can be used for reference, installed) settings. comparison, or analysis.

Save/recall items • Recalling default settings page53176H Memory Four memories: waveform A, B, C, and D.

• Saving waveforms page54177H Source CH1, CH2, Math waveform

• Recalling waveforms page55178H Panel operations 1. Make sure the waveform you want to save (CH1, CH2, or Math result) appears in the Recalling44B the default settings display.

For Math operations details, see page39.179H Recalling the You can recall the default factory settings by default settings pressing the MENU key, then selecting 2. Press the MENU key and FUNCTION → F1 (Recall Factory). select the WAVE SAVE menu using the Up/Down keys. MENU WAVE SAVE

Recall MENU FUNCTION Factory 3. Press F1 (Source) repeatedly CH1 F1 and select the waveform Source source. F1 Trigger Type: Edge Slope: Rising

Source: CH1 Mode: Auto 4. Press F2 (WAVE) repeatedly A Coupling: AC and select the memory Wave location from A to D. F2 CH1 & CH2 Coupling: AC Channel: ON Probe scaling: 1 X Invert: OFF 5. Press F3 (Save) to confirm Save Measurement 1 Item: CH1 frequency saving the waveform into the Item: CH2 frequency specified memory location. F3 Measurement 2 Make sure that the message WAVE SAVED Cursor Cursor: OFF Channel: CH1 “WAVE SAVED” appears in the display. Acquisition Mode: Sample Average number: 16 Time mode Mode: Main timebase Display Type: Vector Persistence: OFF Format: YT Carry: Bitmap Wave Save Source: CH1 Waveform: A Display: OFF

53 54 Using the Oscilloscope GDS-122 User Manual

10B Recalling46B waveforms Menu Tree / Operation Shortcuts

Overview Up to four waveforms can be stored in and Accessing The following menu trees are recalled from the GDS‐122 internal memory. The menus accessible by pressing the MENU stored waveform can be used for reference, key followed by Up/Down keys, MENU comparison, or analysis. except for the OSC OPTION key

(page60).180H Memory Four memories: waveform A, B, C, and D.

Source CH1, CH2, Math waveform Trigger47B Panel operations 1. Press the MENU key and AC select the WAVE SAVE menu RUN/STOP using the Up/Down keys. MENU WAVE SAVE Auto LF Rjc Rising CH2 Normal HF Rjc

Edge Falling CH1 Single DC TRIG MODE TYPE Slope Source Mode Coupling 2. Press F2 (Wave) repeatedly A F1 F2 F3 F4 F5 and select the waveform you Wave want to recall. F2 Inverted CH2 Field

3. Press F4 to turn on the OFF Video Normal CH1 Line waveform. The waveform Show TYPE Polarity Source Sync appears in the display. F4 F1 F2 F3 F4 Select run or stop mode RUN/STOP key

Select edge or video trigger TRIG MODE→F1(TYPE) Select trigger slope TRIG MODE→F1(edge)→F2(Slope) Select trigger source TRIG MODE→F1→F3(Source) Select trigger mode TRIG MODE→F1(edge)→F4(Mode) Select trigger coupling TRIG MODE→F1(edge)→F5(Coupling) Select video polarity TRIG MODE→F1(video)→F2(Polarity) Select video line sync TRIG MODE→F1(video)→F4(Sync)

CH1/CH248B Setup

1000 X CH1 SETUP Note The recalled waveform maintains its original DC 100 X horizontal scale and vertical scale, which are Ground OFF 10 X ON shown in the top left corner of the display. AC ON 1 X OFF CH2 SETUP Changing the current scale does not affect the Coupling Channel Probe Inverted recalled waveform’s shape. F1 F2 F3 F4 Select AC, DC, or Ground coupling CH1/2 SETUP→F1(Coupling)

55 56 Using the Oscilloscope GDS-122 User Manual

CH1/2 SETUP→F2(Channel) Turn CH1 on or off Acquisition52B Mode Select probe scaling CH1/2 SETUP→F3(Probe) Turn inversion on or off CH1/2 SETUP→F4(Inverted) 4 128 64 Measurement49B Setup 1/2 Peak 16 ACQU MODE Sample Average Detect Averages MEAS SET1 CH2 CH2 CH2 CH2 CH2 CH1 CH1 CH1 CH1 CH1 F1 F2 F3 F4 MEAS SET2 Select sampling mode ACQU MODE→F1(Sample) Freq Period Mean PK-PK Cyc RMS Select peak detect mode ACQU MODE→F2(Peak Detect) F1 F2 F3 F4 F5 Select average mode ACQU MODE→F3(Average) Measure CH1/CH2 frequency MEAS SET1/2→F1(Freq) Select average number ACQU MODE→F3→F4(Averages) Measure CH1/CH2 period MEAS SET1/2→F2(Period)

Measure CH1/CH2 mean value MEAS SET1/2→F3(Mean) Time53B Mode Measure CH1/CH2 peak to peak time MEAS SET1/2→F4(PK-PK) Main Zone Measure CH1/CH2 cycle MEAS SET1/2→F5(Cyc RMS) TIME MODE Window TimeBase Window F1 F2 F3 Wave50B Math Select main timebase TIME MODE→F1(Main TimeBase) WAVE MATH Set window zoom width TIME MODE→F2(Zone Window) CH1-CH2 CH2-CH1 CH1+CH2 CH1*CH2 CH1/CH2 Zoom window TIME MODE→F3(Window) F1 F2 F3 F4 F5

Subtract CH2 from CH1 WAVE MATH→F1(CH1-CH2) Function54B Subtract CH1 from CH2 WAVE MATH→F2(CH2-CH1) Recall Autoca- Add CH2 to CH1 WAVE MATH→F3(CH1+CH2) FUNCTION Factory libration Multiply CH2 with CH1 WAVE MATH→F4(CH1*CH2) F1 F2 Divide CH1 by CH2 WAVE MATH→F5(CH1/CH2) Recall factory settings FUNCTION→F1(Recall Factory)

Cursor51B Measurement Run self calibration FUNCTION→F2(Autocalibration)

Time 55B Voltage CH2 Display

OFF CH1 CURS MEAS Infinite Type Source 5 sec 2 sec F1 F2 Dots 1 sec XY Vectors Activate cursor measurement CURS MEAS→F1(Type) Vectors OFF YT Bitmap DISP SET Select source channel CURS MEAS→F2(Source) Type Persist Format Carry F1 F2 F3 F4

57 58 Using the Oscilloscope GDS-122 User Manual

Select line display DISP SET→F1(Type)

Select persistency DISP SET→F2(Persist) OSC58B OPTION key Select display format DISP SET→F3(Format) UP Press the OSC OPTION key repeatedly. The → Select display save format DISP SET F4(Carry) menu message appears in the lower half of OSC the display and the functionalities of four LEFT RIGHT Wave56B Save OPTION keys, UP, DOWN, RIGHT, LEFT, change accordingly. D DOWN Math C CH2 B ON

CH1 A OFF WAVE SAVE Save Source Wave Show

F1 F2 F3 F4 LEFT/RIGHT - Time : CH1/CH2 horizontal position UP/DOWN - CH1 Zero Select source channel WAVE SAVE→F1(Source) : CH1 vertical position Select waveform ID WAVE SAVE→F2(Wave) Save waveform WAVE SAVE→F3(Save) LEFT/RIGHT - Time UP/DOWN - CH2 Zero : CH1/CH2 horizontal position WAVE SAVE→F4(Show) Turn waveform display on or off : CH2 vertical position

System57B Status LEFT/RIGHT - Time UP/DOWN - Trig : CH1/CH2 horizontal position

SYS STAT Horizontal Vertical Trigger Misc : Trigger vertical position

LEFT/RIGHT - Time Base F1 F2 F3 F4 UP/DOWN - CH1 Volts\Div : horizontal scale Show horizontal settings SYS STAT→F1(Horizontal) : CH1 vertical scale Show vertical settings SYS STAT→F2(Vertical) LEFT/RIGHT - Time Base Show trigger settings SYS STAT→F3(Trigger) UP/DOWN - CH2 Volts/Div : horizontal scale Show serial number SYS STAT→F4(Misc) : CH2 vertical scale

(Math mode) (Math mode) – Time : Math horizontal position – CHMath : Math vertical position Volts/Div

(Cursor mode) (Cursor mode) – Time : CH1/CH2 horizontal position – Cursor 1/2 : Cursor 1/2 vertical position

59 60 Using the Oscilloscope GDS-122 User Manual

11B Using the Software Installing59B the software

Overview The GDS‐122 PC software, included in the CD‐ PC requirements • Windows 2000 or XP ROM, allows you to view the waveforms in your • 20MB hard drive space familiar PC environment – large display and mouse operation. Multiple cursors provide flexible • USB host port x 1 waveform measurements. Installation steps 1. Activate the Setup.exe file in the Software The PC software can run the following CD‐ROM. functionalities measurement and actions. • Viewing real‐time updated waveforms 2. The software starts preparing the installation. • Running up to 6 cursor measurements When the welcome window is displayed, click Next and start installing the software to your • Measuring period/frequency/pk‐pk voltage PC. • Printing out waveform images • Saving and recalling waveform shape and data

Software The following is the list of software operations described in this chapter. operations

• Installing the software page62181H

• Modifying, reinstalling, or page64182H 3. The customer information window will appear. uninstalling the software Enter the user name and organization name.

• Connecting the GDS‐122 page65183H Select which user will hold the right to access

• Configuring the screen page68184H the software and click Next.

• Viewing waveforms page69185H

• Measuring waveforms page75186H

• Saving waveforms page75187H User Name • Recalling waveforms page77188H

• Printing out waveforms page80189H Organization

• Accessing the Help page82190H

Note The PC software is intended for oscilloscope operations only; it does not include multimeter Administration operations.

61 62 Using the Oscilloscope GDS-122 User Manual

4. Change the installation directory if necessary Modifying/Reinstalling/Uninstalling60B the software and click Next. Overview After installing the software, you can do the followings using the same setup file. • Modifying the software components • Repairing the software • Uninstalling the software

Steps 1. Activate the Setup.exe. Follow the same procedures as 5. Click Install to start installing the software. installing the software until the Program Maintenance window appears.

6. The software installation automatically starts and ends. Click Finish to complete installation.

Installing the software is completed 2. Select the action – Modify the software components, Repair the software, or Remove (uninstall) the software – and click Next. Proceed according to the instructions.

Shortcut for Alternatively, you can select the Uninstall uninstall DC_Wave from the program startup menu to uninstall the software.

63 64 Using the Oscilloscope GDS-122 User Manual

Activating the 1. Power up the GDS‐122 and activate the Activating61B the software and connecting the GDS-122 GDS-122 oscilloscope screen.

Overview Activate the software and connect the GDS‐122 to 2. Connect an input signal to CH1 and make sure it properly by going through these steps, that the waveform is shown appropriately on described in the paragraphs that follow. the GDS‐122 display.

1. Activating the software and configuring the 3. Open the DISP SET menu and press F4 (Carry) communication port to select the format of the waveform data sent 2. Activating the GDS‐122 and configuring the from the GDS‐122 to the software. data format

3. Connecting them together and if necessary, Vectors installing the USB driver Bitmap MENU DISP SET 4. Acquiring waveform data to confirm that the Carry communication is being secured F4

1. Open the software by Activating the Vectored data of the waveform. selecting DS_Wave.exe Vectors software Always select the vector format when from the startup menu. viewing the waveform in the software.

Bitmap Bitmap image of the display. Select the 2. Select – Bitmap format only when taking the Ports Settings from the bitmap snapshot of the GDS‐122 menu or click the Ports‐ hardware screen. settings icon on the Toolbar. Connecting the 1. Connect the GDS‐122 to the PC (software) via cable the USB cable. Make sure that USB connection is being selected. The baud rate, stop bit, data bit, and 2. Make sure that the USB driver is installed in parity settings are fixed. your PC by accessing the Device Manager (Control Panel ‐> System ‐> Hardware tab). The GDS‐122 should be recognized as a USB hub.

3. If the driver has not been recognized, install it manually by selecting USBDRV Install from the startup menu.

The driver file is located in the USBDRV folder in the software directory.

65 66 Using the Oscilloscope GDS-122 User Manual

Acquiring data In the software, select Communications – Get Data Configuring62B the screen from the menu. Alternatively, you may click the Get data Overview This section introduces how to configure the following parameters in the software screen icon, or press the Ctrl + A key. (waveform viewing mode) to optimize the user interface. Acquiring the GDS-122 display snapshot • Background color • Drawing format When the “Bitmap” format is selected in the GDS‐ 122 display carry setting, the software acquires the • Grid color • Language display snapshot (*.bmp) at the moment. Save the • Grid on/off • Closing the software file in the local folder and use a graphic software to open and edit it. Screen overview

Acquiring the GDS-122 waveform Tool bar When the “Vectors” format is selected in the GDS‐ & Icons 122 display carry setting, the software acquires the waveform data (*.bin) at the moment. CH1

1. The waveform data will be stored in the PC Cursor type memory to allow to be recalled later (page79).191H Edit the location and click Start. CH2 Horizontal scale

Vertical scale Waveform list Measurement result File Model name location Changing the To change the background color, background select View > Background Color from the menu and select the 2. The waveform appears in the software screen. color new color from the color palette that appears. Alternatively, you can also double click inside the screen to call the color palette.

Black background White background

Connecting the GDS-122 to the software is completed

67 68 Using the Oscilloscope GDS-122 User Manual

Turning the grid To turn on or off the grid, select Changing the You can select the language from English (default) on or off View > Grid lines from the menu language or Simplified Chinese. Select Language > English or click the Gridlines icon. (Chinese) from the menu. The Language menu itself always stays as English.

English Chinese

Grid on Grid off

Changing the Make sure the grid is already grid color turned on. Select View > Grid Closing the You can close the software in one of the following Color from the menu and select software ways. The screen configurations will be retained the new color from the color the next time you open the software. palette that appears. • Pressing the Alt + F4 keys Blue grid White grid • Selecting File > Exit from the menu

Changing the You can select how the waveform is being drawn waveform from two formats, line and dots. Select Format > drawing format Data Line (Point) from the menu or click the icons. • Clicking the Close icon at the top right corner of the software Line Point

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Refreshing the In the software, select Viewing63B the waveforms waveforms Communications – Get Data from the menu. Alternatively, Overview This section introduces how to modify the you may click the Get data icon, waveform settings for better viewings. or press the shortcut keys, Ctrl + A. • Selecting the displayed waveforms • Refreshing the waveforms Selecting the Waveform scale settings and automatic measurements are done on the active waveform. • Selecting the active waveform active waveform • Changing the waveform positions 1. Click on the waveform name in the bottom left corner of the screen. • Changing the waveform scales • Viewing the automatic measurement results (CH1 selected as the active waveform)

Screen overview

CH1 2. The following locations changes into the selected channel (example: CH1).

• Colored channel label (at the CH2 Horizontal left side of the screen) scale • Cursor, Time base, Voltage Vertical scale Waveform settings (at the right side of Measurement list the screen) result

Active waveform • Automatic measurement results (at the bottom right Selecting the In the left bottom corner of the screen, put a checkmark in the waveform that needs to appear. corner of the display) displayed waveforms Maximum six waveforms are available: CH1, CH2, A, B, C, D. Waveforms A to D have to be stored in Changing the Changing the horizontal position the GDS‐122 hardware beforehand (see page54192H for waveform 1. Move the mouse over the waveform until the details). positions mouse icon changes into a left‐right arrow.

(CH1, CH2 selected)

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2. Hold the mouse and drag the waveform Changing the vertical scale sideways. Select the vertical scale using the list at the right side of the screen. You can select the scale either by searching in the Scale column or by clicking the Position arrows.

Changing the vertical position Click the channel label at the left side of the waveform and drag the waveform up or down.

Viewing the Before viewing the measurement results, make

automatic sure that the correct waveform is selected Changing the Before changing the scales, make sure that the measurement (highlighted) in the lower left corner of the screen waveform scales correct waveform is selected (highlighted) in the results (example: CH1). lower left corner of the screen (example: CH1).

The measurement result Changing the horizontal scale is updated in the lower right corner of the Select the horizontal scale using screen. Three parameters the list at the right side of the are listed. screen. You can select the scale either by searching in the Scale • Period: measures the waveform period in ms. column or by clicking the • Freq: measures the waveform frequency in Position arrows. kHz. • PK‐PK: measures the peak to peak voltage in V.

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• All: both the horizontal and Using64B the cursor measurements vertical cursors appear.

Overview This section introduces how to use cursor Viewing the The cursor measurement measurements in the software screen. cursor results are updated in the measurement right side of the screen. • Activating the cursors results • dy: the voltage difference • Viewing the cursor measurement results between y1 and y2 cursors • Moving the cursors • y1, y2: voltage cursors 1 and 2 Screen overview • dx: the time difference Vertical cursor between x1 and x2 cursors • x1, x2: time cursors 1 and 2

dx Measurement result 0.0s x1 x2 Horizontal cursor Cursor type y1

dy 0.0V

y2

Activating the Before activating the cursors, make sure that the cursors correct waveform is selected (highlighted) in the Moving the Move the mouse over the cursor until the mouse lower left corner of the screen (example: CH1). cursors icon changes into a left‐right arrow. Hold the mouse and drag the cursor sideways (horizontal cursor) or vertically (vertical cursor).

Select the cursors from the list in the right side of the screen.

• None: the cursor is turned off. The cursor measurement result changes • Horizontal: the horizontal accordingly. cursors appear.

• Vertical: the vertical cursors appear.

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3. Select the data to be saved from Saving65B waveforms the Save column. • sequence: the identification You can save the waveforms into the PC in two Overview number for each data point ways. For details of recalling them, see page79.193H • ch1/ch2: CH1 and CH2 waveform • Storing waveform data (*.bin file, for viewing data in the software) • A/B/C/D: the waveforms stored • Storing data points (*.txt file, for data analysis in the GDS‐122 hardware such as in graphs and maps) memory For details of storing waveforms into the GDS‐122

hardware, see page54.194H Data points stored in an Excel sheet (example) Storing When retrieving waveform data from the GDS‐ sequence ch1 / ch2 A / B / C / D waveform data 122, the waveform data (*.bin format) is

automatically stored. For details, see page69.195H

Storing data 1. Make sure that the waveform is being point displayed in the screen. To recall waveforms

that are stored in the PC, see page79.196H

2. Select View > Data Table from the

menu, or click the Data Table 4. Click the Save As… button to icon on the Toolbar. The Data save the data into a directory. The Table dialogue appears. standard Save dialog appears. 5. To close the Data Point dialogue, do one of the following actions. • Press the Ctrl + Alt key

• Click the Exit icon

Save option • Click the Close icon at the top right corner of the dialogue

Save data Close window

77 78 Using the Oscilloscope GDS-122 User Manual

Recalling66B waveforms Printing67B out waveforms

Overview You can recall the waveforms from the PC in two Overview You can print out the screen contents to a printer

ways. For details of saving them, see page77.197H connected to the PC. When you are printing the • Recalling waveform data (*.bin file, for viewing waveform for the first time, follow all the steps in in the software) the following order.

• Recalling data points (*.txt file, for data 1. Setting up the printer analysis such as in graphs and maps) 2. Setting up the page format For details of recalling waveforms into the GDS‐ 3. Printing out

122 hardware, see page55.198H Setting up the 1. Select File > Printer Setup Recalling the 1. Select File > Open from the printer from the menu. The standard waveform data menu or press the shortcut printer setting dialogue key, Ctrl + O. opens.

2. The File Open dialogue opens. Select one of the SPB bin file (*.bin) and click OK.

3. The waveform(s) will be recalled in the screen. 2. Select the printer and its properties, paper size, and orientation.

Setting up the 1. Select File > Page Setup from page format the menu. The Page Setup dialog window opens.

Borderline

View Setting Recalling the 1. For recalling the data points, you need to open data points a text editor or a spreadsheet program like Excel, in which you can organize the data and create graphs and maps for advanced analysis.

2. Open the saved *.txt file from the application. 2. Set the borderlines (print margins). The range is 0 to 10.0cm each.

79 80 Using the Oscilloscope GDS-122 User Manual

3. Select the View Setting. Accessing68B the Help Redraw graph according to sample data: The GDS‐122 refreshes the waveform and Overview The Help file describes how to install and use the adjust its scale before printing. The most recent software. The About screen shows the software data can be taken, but might take time for version. refreshing. Opening the Open the Help in separate file using one of the Graph zoom in and out Help following methods. The existing waveform is used with its scale • Selecting Help > Help from the adjusted. Since retrieving the data is not menu involved, fast printing is ensured.

4. Open the print preview by selecting File > Print Preview • Clicking the Help icon on the from the menu or clicking the Toolbar Print Preview icon on the toolbar. Make sure that the • Pressing the shortcut key, F1 waveforms are placed appropriately. • Selecting the Help documentation from the startup menu Printing out Print out the waveform in one of the following ways.

• Selecting File > Print in the Print Preview screen menu Software version To view the software version, select Help > About from the • Selecting File > Print from the menu. The software version software menu screen appears.

• Pressing the shortcut keys, Ctrl + P

• Clicking the Printer icon on the Toolbar

81 82 Using the Multimeter GDS-122 User Manual

Activating12B the Multimeter 1. Press the power switch. The Panel operations USING THE welcome screen with the corporate logo appears on the display.

2. To adjust display brightness, use the switch on the side: up (bright) MULTIMETER or down (dark).

3. Press any key (example: MENU (Example) This chapter describes the multimeter key) to activate the display. The functionalities in the GDS‐122. Functionalities battery icon at the top left corner of MENU includes three major items (Voltage, Current, the display shows the battery level. Impedance) and three additional items (Diode, Continuity, Capacitance). The current > 75% 75% 50% 25% < 25% measurement and capacitance measurement use extension modules to deal with large current and

small capacitance, respectively. Delta measurement and automatic range switching 4. Press A (current), V (voltage), or R A (impedance, diode, continuity, features offer flexibility and convenience. V capacitance) switch to proceed. A R Activating the Multimeter ...... 84199H warning message might appear to remind you of correct connections. Measuring Voltage ...... 85200H

Measuring Current ...... 87201H

Measuring Impedance ...... 89202H Measuring Diode ...... 91203H Plug the Multimeter Measuring Continuity ...... 92204H test leads in the Measuring Capacitance ...... 93205H right position!

(Press any key to make sure)

5. Press any key to cancel the warning message and resume the measurement.

83 84 Using the Multimeter GDS-122 User Manual

Auto ranging To let the GDS‐122 select the voltage Auto Measuring13B Voltage range automatically, press F3 (Auto). F3 The indicator at the top left corner of DC voltage Range 400mV, 4V, 400V the display changes to AUTO. AUTO specifications Accuracy ±(1% + 1 digit) (details: page98)206H Manual ranging To select the voltage range manually, Manual Max input 400V press F1 (Manual). The indicator at the F1 top left corner of the display changes AC voltage Range 4V, 40V, 400V to MANUAL. MANUAL specifications Accuracy ±(1% + 3 digits) (details: page98)207H To freeze the measurement, press the Max input 400V Freezing the RUN/STOP measurement RUN/STOP key. The measurement Frequency 40Hz to 400Hz result will be retained and the indicator at the top right corner of the RUN 1. Press the V switch to select the Panel operations V display changes to STOP. To unfreeze, Voltage measurement. If a warning V press the RUN/STOP key again. STOP message appears, press any key to resume measurement. Measuring delta To measure the delta value, press F2 (II/ ). The measurement result at the 2. The voltage measurement screen appears. voltage Δ moment moves to the top right corner Battery level Run/Stop of the display, and the measurement -83.60mV result becomes the difference between Auto/Manual Delta the original result. range measurement result DCV/ACV 1. Press F2 2. Measurement 3. Delta value reset to zero displayed Measurement unit 200.0V Meter Scaling factor Measurement result

F1-F3 menu

3. Press the AUTOSET key AUTOSET repeatedly to select DC or AC voltage measurement.

4. Connect the test leads to the terminals: COM for the black lead V/Ω/C for the red lead

5. The measurement result will be constantly updated in the display. For more detailed settings, see the following instructions.

85 86 Using the Multimeter GDS-122 User Manual

2. Select automatic range by Manual Auto 14B pressing F3 (Auto) or manual Measuring Current F1 F3 by F1 (Manual). The indicator DC current Range & 40mA ±(1% + 1 digit) MANUAL AUTO at the top left corner of the specifications Accuracy 400mA ±(1.5% + 1 digit) display changes accordingly. (details: page98)208H 20A ±(3% + 3 digits) Measuring 1. Connect the Current Max input 400mA (direct input) 400mA 20A (via the extension module) 400mA to 20A Extension module to the MAX COM & mA/A terminals. mA/A COM

AC current Range & 40mA ±(1.5% + 3 digits) Then, connect the test leads 20 AMP specifications Accuracy 400mA ±(2% + 1 digit) to the extension module.

(details: page98)209H 20A ±(5% + 3 digits) Max input 400mA (direct input) (red) (black) 20A (via the extention module) 2. Press F5 (20A) and select the 20A 1. Press the A switch to select the 20A range. The MANUAL Panel operations A F5 MANUAL range indicator activates. current () measurement. If A a warning message appears, press (Auto range is not available) any key to resume measurement. Freezing the To freeze the measurement, press the RUN/STOP Battery level Run/Stop measurement RUN/STOP key. The measurement -83.60mA result will be retained and the Auto/Manual Delta indicator at the top right corner of the RUN range measurement result display changes to STOP. To unfreeze, DCA/ACA press the RUN/STOP key again. STOP

Measurement unit Measuring delta To measure the delta value, press F2 Meter Scaling factor current (II/Δ). The measurement result at the moment moves to the top right corner Measurement result of the display, and the measurement result becomes the difference between F1-F5 menu the original result.

1. Press F2 2. Measurement 3. Delta value 2. Press the AUTOSET key AUTOSET reset to zero displayed repeatedly to select DC or AC current measurement. 20.0mA

Measuring 0mA 1. Connect the test leads to the (red) (black) to 400mA terminals: 400mA COM for the black lead MAX mA/A for the red lead mA/A COM

If the range is set at 20A, mA press F4 (mA) and change it F2 20A mA to mA range.

87 88 Using the Multimeter GDS-122 User Manual

Manual ranging To select the voltage range manually, Manual 15B press F1 (Manual). The indicator at the Measuring Impedance F1 top left corner of the display changes 400 ±(1% + 3 digits) MANUAL Impedance Range & Ω to MANUAL. specifications Resolution 4k, 40k, 400k, 4MΩ ±(1% + 1 digit) (details: page98)210H Freezing the To freeze the measurement, press the 40M ±(1.5% + 3 digits) RUN/STOP Ω measurement RUN/STOP key. The measurement

result will be retained and the Panel operations 1. Press the R switch. If a warning RUN message appears, press any key to indicator at the top right corner of the resume measurement. display changes to STOP. To unfreeze, press the RUN/STOP key again. STOP

2. Press the AUTOSET key repeatedly AUTOSET to select the impedance Measuring delta To measure the delta value, press F2 measurement. impedance (II/Δ). The measurement result at the moment moves to the top right corner 3. The impedance screen appears. of the display, and the measurement result becomes the difference between the original result.

1. Press F2 2. Measurement 3. Delta value reset to zero displayed

120.0kO

4. Connect the test leads to the terminals: COM for the black lead V/Ω/C for the red lead

5. The measurement result will be constantly updated in the display. For more detailed settings, see the following instructions.

Auto ranging To let the GDS‐122 select the voltage Auto range automatically, press F3 (Auto). F3 The indicator at the top left corner of the display changes to AUTO. AUTO

89 90 Using the Multimeter GDS-122 User Manual

Measuring16B Diode Measuring17B Continuity

Range 0V to 1.5V Conditions < 50Ω (beeping)

Panel operations 1. Press the R switch. If a warning Panel operations 1. Press the R switch. If a warning message appears, press any key to message appears, press any key to resume measurement. resume measurement.

2. Press the AUTOSET key repeatedly AUTOSET 2. Press the AUTOSET key repeatedly AUTOSET to select the diode measurement. to select the continuity measurement. 3. The diode measurement screen appears. 3. The continuity measurement screen appears. Battery level Run/Stop Battery level Run/Stop Manual range Manual range Diode Measurement Continuity unit Measurement Meter Scaling factor unit Measurement Meter Scaling factor result Measurement F1-F3 menu result (not used) F1-F3 menu (not used) 4. Connect the test leads to the terminals: 4. Connect the test leads to the COM for the black lead terminals: V/Ω/C for the red lead COM for the black lead V/Ω/C for the red lead 5. The measurement result will be constantly updated in the display. 5. If the GDS‐122 confirms continuity (the impedance is less than 50Ω), the beeper Freezing the To freeze the measurement, press the RUN/STOP sounds. measurement RUN/STOP key. The measurement

result will be retained and the Freezing the To freeze the measurement, press the RUN RUN/STOP indicator at the top right corner of the measurement RUN/STOP key. The measurement display changes to STOP. To unfreeze, result will be retained and the press the RUN/STOP key again. STOP RUN indicator at the top right corner of the display changes to STOP. To unfreeze, press the RUN/STOP key again. STOP

91 92 Using the Multimeter GDS-122 User Manual

Measuring18B Capacitance Freezing the To freeze the measurement, press the RUN/STOP Continuity Range 51.2nF to 100uF ±(3% + 3 digits) measurement RUN/STOP key. The measurement specifications result will be retained and the indicator at the top right corner of the RUN Panel operations 1. Press the R switch. If a warning display changes to STOP. To unfreeze, message appears, press any key to press the RUN/STOP key again. STOP

resume measurement. Measuring delta To measure the delta value, press F2

2. Press the AUTOSET key repeatedly AUTOSET capacitance (II/Δ). The measurement result at the to select the capacitance moment moves to the top right corner measurement. of the display, and the measurement result becomes the difference between 3. The capacitance screen appears. the original result.

Battery level Run/Stop 1. Press F2 2. Measurement 3. Delta value reset to zero displayed Auto range Delta measurement result Capacitance 59.6nF Measurement unit Meter Scaling factor Measurement result F1-F3 menu (F1, F3 not used)

Measuring 5nF Connect the test leads to the CX CATII 400V and above terminals. CX

Measuring less Connect the Capacitance then 5nF Extension module to the COM 400V & V/ /C terminals. Then, 400V Ω COMMAX V/O/C connect the test leads to the extension module. The CX <5nf measurement result will be constantly updated in the display.

93 94 Faq GDS-122 User Manual

video, is selected. • Try changing the HF and LF repression in the trigger coupling mode and filtering out FAQ high or low frequency noise. No waveform in Q The waveform does not appear at all in the the oscilloscope display. Power Q • The GDS‐122 does not power up. A • The trigger level might be out of the • The GDS‐122 stopped working after a short waveform range. Press the AUTOSET key period of time. so that the GDS‐122 automatically adjusts A The battery may need recharging. Connect the the trigger level. GDS‐122 to the AC adaptor and recharge it for • If the trigger mode is Single, press the at least 15 minutes. Then try powering up. RUN/STOP key to trigger the waveform or switch the trigger mode to Normal. See

ERR mode in the Q In the multimeter mode, the measurement page30213H for trigger details. multimeter type at the top of the display says “ERR” which looks like an error message. Slow update in Q It takes 30 to 40 seconds for the multimeter to the multimeter update the capacitor measurement. A The “ERR” sign appears when none of the measurement switch is pressed. Select one A It takes longer time to measure small from the V, A, or R switch and press it. capacitors. 30 to 40 seconds are normal for measuring 5nF or smaller capacitors. See

Amplitude Q The measured voltage is 10 times smaller than page93214H for capacitance measurement details. mismatch in the the real value. oscilloscope Slow update in Q The display response to the waveform change A The attenuation ratio on the probe is set at x10. the oscilloscope is unusually slow. If you switch it to x1, make sure that the input voltage does not surpass the maximum 400V. A Slow response is normal in the following cases. Q The measured voltage is 10/100/1000 times larger than the real value. • Average sampling mode is being selected

(page22)215H A The probe ratio in the CH1 or CH2 setup • Display persistence is being selected menu is set at X10, X100, or X1000. See page22211H (page36)216H for details.

Unstable Q The waveform appears in the display but is waveform in the not stable. oscilloscope A Configuring the trigger might help you. See

page30212H for details. • Make sure the trigger source channel matches the input signal. • Make sure the correct trigger type, edge or

95 96 Specifications GDS-122 User Manual

Trigger Sensitivity CH1 and CH2: 1div(DC～full bandwidth) DC coupling: ≥ 50Hz. Trigger level ±6 divisions from the screen center PECIFICATIONS Level accuracy ±0.3 div (typical, rise/fall time ≥ 20ns) S Displacement 655div (pre-trigger), 4div (post- trigger) 50% level setting Input signal frequency ≥ 50Hz (typical)

Conditions for The following specifications are applicable when Trigger sensitivity 2 div of peak-to-peak (video trigger) specifications these two conditions are met: Signal system NTSC, PAL, SECAM (any frequency) △ △ • The GDS‐122 has been powered up for at least Measurement Cursor V and T between cursors 30 minutes, during which temperature Automatic Peak-to-peak, average, root mean fluctuation is no more than 5 degrees Celsius. square, frequency, and cycle • The probe attenuation is set to X 10. Probe 1X position 10X position Bandwidth ≤ 6 MHz (DC) Full bandwidth (DC) Attenuation rate 1: 1 10: 1

69B Oscilloscope specifications Compensation 10pf～35pf 10pf～35pf Ω± ％ Ω± ％ Sampling Mode Normal, Peak detection, Average Input impedance 1M 2 10M 2 ～ ～ Rate 100 MSa/s Input impendence 85pf 115pf 14.5pf 17.5pf Input Coupling DC, AC Input voltage 150 V DC 300V DC Impedance 1MΩ±2% in parallel with 20pF±3pF Probe 1X, 10X, 100X, 1000X Multimeter70B specifications Max. Input 400V (peak) VDC Input impedance 10MΩ Channel delay 150ps (typical) Max input 1000V (DC or AC peak-to-peak value) ～ Horizontal Sampling rate 10S/s 100mS/s Accuracy ±1%±1 digit （ ） Interpolation sin x /x Resolution 400mV range: 100uV Record length 6K points on each channel 4V range: 1mV ～ Scanning speed 5ns/div 5s/div, 1-2.5-5 step 40V range: 10mV ± Sampling rate / 100ppm (time interval ≥ 1ms) 400V range: 100mV relay time accuracy VAC Input impedance 10MΩ Interval (△T) Single: ±(1 interval time +100ppm× Max input 750V(AC, virtual value) reading+0.6ns) Average >16 : ±(1 accuracy (full Frequency range 40Hz~400Hz interval time +100ppm×reading+0.4ns) bandwidth) Display Virtual value of sine wave Vertical A/D converter 8 bits resolution (2CH simultaneously) Accuracy ±1%±3 digits ～ （ ） Sensitivity 5mV/div 5V/div at input Resolution 4V range: 1mV ± ～ ± ～ Displacement 50V(500mV 5V), 1V(5mV 200mV) 40V range: 10mV Bandwidth 20M 400V range: 100mV Single Full bandwidth DCA Accuracy 40mA range: ±1%±1 digit （ ） Low frequency ≥5Hz at input, AD coupling, -3dB 400mA range: ±1.5%±1 digit Rise time ≤17.5ns (at input, typical) 20A range: ±3%±3 digits ±5% (DC ) DC accuracy Resolution 40mA range: 10uA DC accuracy (avg) Avg >16: ±(5% rdg + 0.05 div) for △V

97 98 Specifications GDS-122 User Manual

400mA range: 100uA 20A range: 10mA ACA Accuracy 40mA range: ±1.5%±3 digit 400mA range: ±2 %±1 digit ± ± DECLARATION OF 20A range: 5% 3 digits Resolution 40mA range: 10uA 400mA range: 100uA 20A range: 10mA CONFORMITY Resistance Accuracy 400Ω range: ±1%±3 digits 4kΩ~4MΩ range: ±1%±1 digit 40MΩ range: ±1.5%±1 digit We Resolution 400Ω range: 0.1Ω GOOD WILL INSTRUMENT CO., LTD. 4kΩ range: 1Ω (1) No.7‐1, Jhongsing Rd., Tucheng City, Taipei County, Taiwan 40kΩ range: 10Ω (2) No. 69, Lu San Road, Suzhou City (Xin Qu), Jiangsu Sheng, China 400kΩ range: 100Ω declare, that the below mentioned product 4MΩ range: 1kΩ Type of Product: Handheld Digital Storage Oscilloscope & Multimeter 40MΩ range: 10kΩ Model Number: GDS‐122 Capacitance Accuracy ±3%±3 digits is herewith confirmed to comply with the requirements set out in the Resolution 51.2nF range: 10pF Council Directive on the Approximation of the Law of Member States 512nF range: 100pF relating to Electromagnetic Compatibility (89/336/EEC) and Low Voltage 5.12uF range: 1nF Directive (73/23/EEC). 51.2uF range: 10nF For the evaluation regarding the Electromagnetic Compatibility and Low 100uF range: 100nF Voltage Directive, the following standards were applied: ◎ EMC Diode Reading range 0V~1.5V Continuity Threshold < 30Ω EN 61326‐1: Electrical equipment for measurement, control and use –– EMC requirements (1997 + A1:1998 + A2:2001 + A3:2003)

General71B specifications Current Harmonics Voltage Fluctuations EN 61000‐3‐2: 2000 + A2:2005 EN 61000‐3‐3: 1995 + A1:2001 Display Type 3.8" color liquid crystal display ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ × Resolution 320 (horizontal) 240 (vertical) pixels ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ ‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐‐ Color 4096 colors ◎ Safety Power Consumption < 6W Low Voltage Equipment Directive 73/23/EEC Supply 100V~240V AC, 50/60Hz Safety Requirements DC input 8.5VDC, 1500mA IEC/EN 61010‐1: 2001 (2nd Edition) Environment Operating Temperature: 0 to 40 °C(32 to 104 °F) Relative humidity: < 75% Storage Temperature: -20 to 60 °C(-4 to 140 °F) Relative humidity: < 75% Mechanical Dimension 18 cm×11.5cm×4cm Weight 690g

99 100 Index GDS-122 User Manual

settings ...... 36 grid, PC software...... 69 shortcuts...... 58 ground symbol...... 6 specifications ...... 99 help, PC software ...... 82 division, math mode ...... 39 Hf Rjc ...... 32 INDEX dot drawing ...... 36 horizontal edge trigger...... 30 adjusting position...... 20, 25 auto mode ...... 31 adjusting scale...... 19, 26 coupling mode ...... 32 scale vs trigger status...... 28 AC coupling channel mode ...... 31 short cuts...... 58 trigger ...... 32 edge trigger ...... 31 normal mode ...... 32 specifications...... 97 vertical...... 24 on/off ...... 23 single mode ...... 32 system status ...... 37 ACA multimeter ...... 87 video trigger source ...... 34 EN61000 ...... 100 impedance, multimeter...... 89 specifications...... 99 contents of package...... 10 EN61010 specifications...... 99 AC‐DC adaptor...... 10 continuity, multimeter...... 92 declaration of conformity...... 100 installing PC software...... 62 acquisition...... 35 specifications...... 99 measurement category ...... 7 inverting channel...... 24 short cuts...... 58 coupling pollution degree...... 7 language system status ...... 37 system status ...... 38 EN61326‐1...... 100 PC software ...... 70 ACV multimeter ...... 85 trigger...... 32 environment short cuts...... 58 specifications...... 98 vertical...... 24 operation...... 7 LF Rjc ...... 32 addition, math mode...... 39 cursor measurement specifications ...... 99 line data, PC software...... 69 auto ranging PC software ...... 75 storage ...... 8 line trigger, video ...... 34 impedance multimeter ...... 89 short cuts...... 57 ERR mode, multimeter ...... 95 list of features...... 11 voltage multimeter...... 86 time ...... 42 extension module magnification, vertical ...... 25 auto trigger mode...... 31 voltage...... 43 capacitance multimeter...... 93 manual ranging AUTO trigger status...... 27 cycle rms, automatic measurement 41 current multimeter ...... 88 current multimeter ...... 88 automatic measurements ...... 41 data point, storing ...... 77 package ...... 10 impedance multimeter ...... 90 shortcuts...... 57 data table, PC software...... 77 factory settings...... 53 voltage multimeter...... 86 Autoset ...... 18 DC coupling FAQ...... 95 manual, overview of ...... 14 capacity multimeter ...... 93 trigger...... 32 ERR mode, multimeter ...... 95 math mode...... 39 continuity, multimeter...... 92 vertical...... 24 magnification ...... 95 shortcuts...... 57 diode, multimeter...... 91 DCA multimeter ...... 87 no waveform ...... 96 system status ...... 38 impedance measurement ...... 89 specifications...... 98 powering up ...... 95 mean voltage, auto measurement... 41 voltage multimeter...... 85 DCV multimeter ...... 85 slow update, multimeter ...... 96 multimeter average acquisition mode ...... 35 specifications...... 98 slow update, oscilloscope...... 96 activating ...... 84 application ...... 49 default settings...... 53 unstable waveform...... 95 capacitance measurement ...... 93 background color, PC software...... 68 delta measurement field trigger, video...... 34 continuity measurement ...... 92 battery level ...... 16 capacitance multimeter ...... 94 freezing measurement current measurement...... 87 calibration ...... 51 current multimeter ...... 88 capacitance multimeter...... 94 diode measurement...... 91 short cuts...... 58 impedance multimeter ...... 90 continuity multimeter...... 92 ERR mode ...... 95 capacitance measurement, voltage multimeter...... 86 current multimeter ...... 88 impedance measurement ...... 89 multimeter ...... 93 diode measurement, multimeter..... 91 diode multimeter...... 91 specifications...... 98 specifications...... 99 specifications...... 99 impedance multimeter ...... 90 voltage measurement...... 85 carry, interface setting ...... 66 display voltage multimeter...... 86 warning message...... 84 carrying case...... 10 acquiring snapshot...... 67 frequency, automatic measurement41 multiplication, math mode ...... 39 caution symbol...... 6 brightness adjustment ...... 16 front panel overview...... 12 noisy signal, viewing ...... 49 CD‐ROM ...... 10 overview ...... 19 grid color, PC software...... 69 normal trigger mode...... 32

101 102 Index GDS-122 User Manual operation environment...... 7 calibration...... 52 time cursor...... 42 variations, viewing...... 50 OSC option key...... 60 package ...... 10 Trigʹd trigger status...... 27 vector drawing...... 36 oscilloscope setting attenuation...... 17 trigger vertical specifications...... 97 specifications...... 98 adjusting level...... 28 adjusting position...... 20, 23 switching to multimeter ...... 16 Ready trigger status ...... 27 auto mode ...... 31 adjusting scale...... 19, 23 package contents...... 10 recalling channel, edge trigger ...... 31 inverting channel...... 24 PC software default settings...... 53 coupling mode ...... 32 selecting coupling mode...... 24 activation ...... 65 default settings, shortcuts ...... 58 edge triggering...... 30 selecting magnification...... 25 cursor measurement ...... 75 waveforms from GDS‐122...... 55 mode ...... 31 shortcuts...... 56 help ...... 82 waveforms, PC software ...... 79 normal mode ...... 32 specifications...... 97 installation ...... 62 resetting trigger level...... 29 run/stop...... 28 system status ...... 38 overview ...... 61 run trigger...... 28 shortcuts...... 56 video trigger ...... 33 package ...... 10 sample acquisition mode...... 35 single mode ...... 32 field trigger...... 34 printing out...... 80 saving slope...... 30 line trigger ...... 34 saving waveform ...... 77 shortcuts...... 59 source channel, video ...... 34 source channel ...... 34 screen overview ...... 68 waveforms in PC software...... 77 specifications ...... 98 sync ...... 34 uninstall ...... 64 waveforms inside GDS‐122 ...... 54 status icons ...... 27 voltage cursor...... 43 version...... 82 scale status vs horizontal scale...... 28 warning message, multimeter...... 84 viewing waveforms...... 71 horizontal...... 26 sync, video trigger...... 34 warning symbol...... 6 peak detect acquisition mode...... 35 math mode...... 40 system status ...... 38 xy mode...... 47 application ...... 48 vertical...... 23 video ...... 33 system status ...... 37 period, automatic measurement ..... 41 waveform, PC software...... 73 UK power cord...... 8 zoom waveform...... 45 persistence setting ...... 36 xy mode...... 47 USB driver installation ...... 65 system status ...... 37 application ...... 50 zoom ...... 46 pk‐pk voltage, automatic Scan trigger status ...... 27 measurement...... 41 self calibration...... 51 point data, PC software ...... 69 SET1/2, automatic measurement..... 41 position signal peak, viewing ...... 48 horizontal...... 25 single trigger mode ...... 32 math mode...... 40 slope, trigger...... 30 shortcuts...... 60 snapshot, display...... 67 time cursor...... 43 software version ...... 82 trigger ...... 28 specifications vertical...... 23 general...... 99 voltage cursor...... 44 multimeter ...... 98 waveform, PC software...... 72 oscilloscope...... 97 xy mode...... 47 stop trigger ...... 28 power supply STOP trigger status ...... 27 safety instructions ...... 7 storage environment ...... 8 specifications...... 99 subtraction, math mode...... 39 power up, faq ...... 95 synchronization, video trigger ...... 34 powering up ...... 16 system status ...... 37 print out, PC software...... 80 shortcuts...... 59 probe test lead ...... 10 adjusting display magnification 17 threshold, continuity multimeter.... 92 adjustment tool ...... 10 tilt stand ...... 17

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