Rigol DS1000CA series, DS1302CA, DS1202CA, DS1102CA, DS1072CA User Manual

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RIGOL

User’s Guide

DS1000CA Series

Digital Oscilloscopes

DS1302CA, DS1202CA, DS1102CA, DS1072CA

Aug. 2011

RIGOL Technologies, Inc.

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User‟s Guide for DS1000CA Series

Guaranty and Declaration

Trademark Information RIGOL is registered trademark of RIGOL Technologies, Inc.

Publication Number

UGA03113-1110

Notices

 RIGOL products are protected by patent law in and outside of P.R.C..  RIGOL Technologies, Inc. reserves the right to modify or change parts of or all

the specifications and pricing policies at company‟s sole decision.

 Information in this publication replaces all previously corresponding material.  RIGOL shall not be liable for losses caused by either incidental or

consequential in connection with the furnishing, use or performance of this manual as well as any information contained.

 Any part of this document is forbidden to copy or photocopy or rearrange

without prior written approval of RIGOL.

Product Certification RIGOL guarantees this product conforms to the standards of national and industrial.

Meanwhile, the related standards conform to other ISO will get further. At present, DS1000CA has passed CE, cTUVus and GOST certification.

If you have any problem or requirement when using our products, please contact RIGOL Technologies, Inc. or your local distributors, or visit: www.rigol.com

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User‟s Guide for DS1000CA Series

Safety Notices

Review the following safety precautions carefully before operating the instrument to avoid any personal injuries or damages to the instrument and any products connected to it. To avoid potential hazards use the

instrument as specified by this user‟s

guide only.

The instrument should be serviced by qualified personnel only.

To Avoid Fire or Personal Injury.

Use Proper Power Cord.

Use the power cord designed for the instrument and authorized in your country only.

Ground The Instrument.

The oscilloscope is grounded through the grounding conductor of the power cord. To avoid electric shock the instrument grounding conductor(s) must be grounded properly, before making connections to the input or output terminals of the instrument.

Connect The Probe.

The probes‟ ground terminals are at the

same voltage level of the instrument ground. Do not connect the ground terminals to a high voltage.

Observe All Terminal Ratings.

To avoid fire or shock hazard, observe all ratings and marks on the instrument.

Follow the user‟s guide for further

ratings information before making connections to the instrument.

Do Not Operate Without Covers.

Do not operate the instrument with covers or panels removed.

Use Proper Fuse.

Use the fuse of the type, voltage and current ratings as specified for the instrument.

Avoid Circuit or Wire Exposure.

Do not touch exposed connections and components when power is on.

Do Not Operate With Suspected Failures.

If suspected damage occurs with the instrument, have it inspected by qualified service personnel before further operations.

Provide Proper Ventilation.

Refer to the installation instructions for proper ventilation of the instrument.

Do Not Operate in Wet Conditions

In order to avoid short circuiting to the

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User‟s Guide for DS1000CA Series

III

interior of the device or electric shock, please do not operate in a humid environment.

Do Not Operate in an Explosive Atmosphere

In order to avoid damages to the device or personal injuries, it is important to operate the device away from an explosive atmosphere.

Keep Product Surfaces Clean and Dry

To avoid the influence of dust and/or moisture in air, please keep the surface of device clean and dry.

The disturbance test of all the models meet the limit values of A in the standard of EN 61326:

1997+A1+A2+A3, but can’t meet

the limit values of B.

Measurement Category

The DS1000CA series Digital Oscilloscope is intended to be used for measurements in Measurement Category I.

Measurement Category

Definitions

Measurement Category I is for measurements performed on circuits not directly connected to MAINS. Examples are measurements on circuits not derived from MAINS, and specially protected (internal) MAINS derived circuits. In the latter case, transient stresses are variable; for that reason, the transient withstand capability of the equipment is made known to the user.

WARNING

IEC Measurement Category I. The input terminals may be connected to circuit terminal in IEC Category I installations for voltages up to 300 VAC. To avoid the danger of electric shock, do not

connect the inputs to circuit‟s voltages

above 300 VAC.

Transient overvoltage is also present on circuits that are isolated from mains. The DS1000CA series Digital Oscilloscopes is designed to safely withstand occasional transient overvoltage up to 500 Vpk. Do not use this equipment to measure circuits where transient overvoltage could exceed this level.

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User‟s Guide for DS1000CA Series

Safety Terms and Symbols

Terms in this Manual. These terms may appear in this manual:

WARNING

Warning statements indicate the conditions or practices that could result in injury or loss of life.

CAUTION

Caution statements indicate the conditions or practices that could result in

damage to this product or other property.

Terms on the Product. These terms may appear on the product:

DANGER indicates an injury or hazard that may immediately happen. WARNING indicates a potential injury or hazard that may immediately happen. CAUTION indicates that a potential damage to the instrument or other property

might occur.

Symbols on the Product. These symbols may appear on the product:

Hazardous Voltage

Refer to Instructions

Protective Earth Terminal

Test Grounding

Chassis Ground

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User‟s Guide for DS1000CA Series

Instrument at a Glance

Four types of DS1000CA series digital oscilloscopes will be introduced in this book: DS1072CA, DS1102CA, DS1202CA, DS1302CA

The instrument could help users to achieve high-quality measurement by excellent performance, powerful functions and easy operation.

DS1000CA is designed for 2GSa/s maximum real-time sample rate, 50GSa/s maximum equivalent sample rate, 300MHz maximum bandwidth and 20000wfms/s waveform capture, which are used to capture rapidly changing waveforms fast and accurately. Besides, abundant trigger, math and acquire functions enable it easy to capture and analyze waveforms, also, AUTO button is available to display a signal automatically. What‟s more, design of panels, LCD, interface and buttons are friendly and clear, making operation more comfortable.

Main Features:

 Dual Channel, Bandwidth:

300MHz (DS1302CA) 200MHz (DS1202CA) 100MHz (DS1102CA 70MHz (DS1072CA)

 Color TFT LCD, 320× 234 pixels resolution.  Plug and play USB storage.  Adjustable waveform intensity, more effective waveform viewing.  One-touch automatic setup, ease of use (AUTO).  Supports waveforms, setups, bitmap and CSV format storage and reappearance

of waveforms and setups.

 Delayed Scan Function, easy to give attention to both details and overview of a

waveform.

 20 Automatic measurements.  Automatic cursor tracking measurements.  Waveform recorder, record and replay dynamic waveforms.  User selectable fast offset calibration.  Built-in FFT function, Frequency Counter.

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 Digital filters, includes LPF, HPF, BPF, BRF.  Pass/Fail Function, optically isolated Pass/Fail output.  Add, Subtract and Multiply Mathematic Functions.  Advanced trigger types include: Edge, Video, Pulse width, Slope, Alternative.  Adjustable trigger sensitivity.  Multiple Language User Interface.  Pop-up menu makes it easy to read and easy to use.  Built-in Chinese and English help system.  Easy-to-use file system supports Chinese & English characters file name input.

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VII

Structure of This Document

Chpter 1 Quick Start

To introduce the panls and menus to help user to realize the base operations.

Chapter 2 Operating Your Oscilloscope

More details to help users to understand the functions and measurements of instrument deeply.

Chapter 3 Application Examples

To show the measurement functions directly by application examples.

Chapter 4 Troubleshooting

Provide you troubleshooting to solve the problems during operating.

Chpter 5 Specifications

List common specifications and characteristics of DS1000CA series oscilloscope.

Chapter 6 Appendix

Information about accessories, warranties, services and supports and the like.

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Content

Guaranty and Declaration ....................................................................... I

Safety Notices ........................................................................................ II

Instrument at a Glance ............................................................................. V

Chapter 1 Quick Start ........................................................................ 1-1

General Inspect .................................................................................... 1-2

Panels and User Interface ...................................................................... 1-3

Function Check ..................................................................................... 1-7

To Compensate Probes .......................................................................... 1-9

To Display a Signal Automatically ......................................................... 1-10

To Understand the Vertical System ....................................................... 1-11

To Understand the Horizontal System ................................................... 1-13

To Understand the Trigger System ....................................................... 1-15

Chapter 2 Operating Your Oscilloscope .............................................. 2-1

To Set Up the Vertical System ................................................................ 2-2

Channel Settings ............................................................................ 2-4

Math functions ............................................................................. 2-14

REF function ................................................................................ 2-18

To Set Up the Horizontal System .......................................................... 2-26

Delayed Scan ............................................................................... 2-28

X-Y Format .................................................................................. 2-29

To Set Up the Trigger System .............................................................. 2-30

Edge Trigger ................................................................................ 2-31

Pulse Width Trigger ...................................................................... 2-32

Video Trigger ............................................................................... 2-33

Slope Trigger ............................................................................... 2-36

Alternative Trigger ........................................................................ 2-38

Trigger Settings ............................................................................ 2-41

Trigger Holdoff ............................................................................. 2-42

To Set Up the Sampling System ........................................................... 2-46

To Set Up the Display System .............................................................. 2-50

To Store and Recall Waveforms or Setups ............................................. 2-53

To Set Up the Utility ............................................................................ 2-60

I/O Setup .................................................................................... 2-62

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Language ..................................................................................... 2-63

Pass/Fail ...................................................................................... 2-64

Waveform Recorder ...................................................................... 2-68

Print Set ...................................................................................... 2-72

Self-Calibration ............................................................................. 2-73

Service ........................................................................................ 2-74

Preference ................................................................................... 2-75

To Measure Automatically .................................................................... 2-77

Automatic measurement of voltage parameters ............................... 2-81

Automatic measurement of time parameters .................................... 2-82

To Measure with Cursors ...................................................................... 2-83

Manual Mode ................................................................................ 2-84

Track Mode .................................................................................. 2-86

Auto Mode ................................................................................... 2-88

To Use Run Control Buttons ................................................................. 2-89

Chapter 3 Application & Examples ..................................................... 3-1

Example 1: Taking Simple Measurements ................................................ 3-1

Example 2: View a Signal Delay Caused by a Circuit.................................. 3-2

Example 3: Capture a Single-Shot Signal ................................................. 3-3

Example 4: To Reduce the Random Noise on a Signal ............................... 3-4

Example 5: Making Cursor Measurements ................................................ 3-6

Example 6: The application of the X-Y operation ...................................... 3-8

Example 7: Triggering on a Video Signal ................................................ 3-10

Example 8: FFT Cursor Measurement .................................................... 3-12

Example 9: Pass/Fail Test .................................................................... 3-13

Chapter 4 Troubleshooting ................................................................ 4-1

Chapter 5 Specifications .................................................................... 5-1

Technical Specifications ................................................................... 5-2

General Specifications ..................................................................... 5-6

Chapter 6 Appendix ........................................................................... 6-1

Appendix A: DS1000CA series Accessories ............................................... 6-1

Appendix B: Warranty ............................................................................ 6-2

Appendix C: Maintenance ....................................................................... 6-3

Appendix D: Any Comment or Question? ................................................. 6-4

Index ...................................................................................................... 1

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User‟s Guide for DS1000CA Series

1-1

Chapter 1 Quick Start

This chapter covers the following topics:

 General Inspect  Panels and User Interface  Function Check  To Compensate Probes  To Display a Signal Automatically  To Understand the Vertical System  To Understand the Horizontal System  To Understand the Trigger System

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General Inspect

After receiving a new DS1000CA series oscilloscope, please inspect the instrument as follows:

1. Inspect the shipping container for damage.

Keep the damaged shipping container or cushioning material until the contents of the shipment have been checked for completeness and the instrument has passed both electrical and mechanical test.

The consigner or carrier shall be liable for the damage to instrument resulting from shipment, without free maintenance or replacement by RIGOL.

2. Inspect the instrument.

In case of any damage, or defect, or failure, notify your RIGOL Sales Representative.

3. Check the accessories.

Accessories supplied with the instrument are listed in "Appendix A: DS1000CA series Accessories" in this guide. If the contents are incomplete or damaged, please notify your RIGOL Sales Representative.

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Panels and User Interface

The first thing to do with a new oscilloscope is to know its panels. This chapter helps to be familiar with the layout of the knobs and keys and how to use them. Read the chapter carefully before further operations.

The Front Panel

The front panel is divided into “function menu”, “run control”, “trigger control”, “horizontal control” and “vertical control” areas.

Thereinto, five grey menu buttons which lie beside LCD screen (defined No.1 to No.5) are used to switch current menu options. Other function buttons are used to enable the access to many measurement features associated with advanced functions, mathematics, reference or to run control features. In addition, multi-function knob is available to adjust waveform brightness or switch menus, but others are applied to adjust offset, volts/div or s/div.

Figure 1-1

Front panel of DS1000CA series oscilloscope

Power Switch Turn On/Off Multi-function Function Run Control

LCD Menu Knob Menu

USB Host Menu Buttons Analog Signal EXT TRIG

Input Channels Channel

Probe Compensator

Trigger Control

Horizontal Control

Vertical Control

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Interfaces:

USB Host: It is used to connect DS1000CA with external USB devices when the

oscilloscope is regarded as “Host Device”. For example, connect a USB flash device.

Signal Input: Two channels are provided: CH1 and CH2. EXT TRIG Input: It is applied to input external trigger signal.

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The Rear Panel

Figure 1-2

Rear panel of DS1000CA series oscilloscope

Interfaces:

Pass/Fail: It is used to output the pass/fail test result. RS232: To connect the oscilloscope with external devices by serial port. USB Device: It is used to connect DS1000CA with external USB devices when the

oscilloscope is regarded as a “Slave Device”. For example, connect with PC for remote control.

Notation definitions in this User’s Guide:

Throughout this manual, notation symbols of buttons and knobs are the same of those on front-panel.

 A box around the name of the key denotes MENU function buttons on

front-panel, such as Measure.

 ( ) denotes the multi-function knob .  denotes the two POSITION knobs.  denotes the two SCALE knobs.  denotes the LEVEL knob.  The name with a drop shadow denotes the menu operating key, such as

Waveforms soft key in Storage menu.

 Use “→” to divide operation steps. Such as: Storage → Storage, indicates press

“Storage” button on the front panel, then press “Storage” menu.

Pass/Fail RS232 USB Device

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User’s Interface

Figure 1-3 User‟s Interface

Channel 2

Location of Waveform Trigger Point Run Status Window in Memory in Memory

CH1 Volts/Div CH2 Volts/Div Timebase Trigger Offset

Channel 1

Status Bar

Trigger Point in Waveform Window

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1-7

Function Check

Perform this quick functional check to verify that the instrument is operating correctly.

1. Turn on the instrument

Use the power cord designed for the oscilloscope to connect the instrument and AC power which delivers 100 to 240 VAC

RMS

, 45Hz to 440Hz. Press the power switch to turn on the instruments, waiting until the display shows the waveform window.

2. Recall factory setting

Press Storage → Storage → Factory → Load, to recall factory setting.

Figure 1-4

Turn on the instrument

WARNNING

To avoid electric shock, be sure the oscilloscope is properly grounded.

3. Input a signal to a channel of the oscilloscope

 Push BNC plug of probe into CH1 BNC connector, then twist the BNC cable to

right to lock the probe in place. Switch on the probe to 10X.

Power Switch Storage Button

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Figure 1-5 Probe connection Figure 1-6 Probe adjustment

 Press CH1 → Probe → 10X to set probe attenuation of the oscilloscope, so as

to make sure the measurement result is correct. (Default probe attenuation scale is 1X.)

 Attach the probe tip to the Probe compensator connector and the reference

lead to the ground pin. Press AUTO, within a few seconds, a square wave will display (approximately 1 kHz 3 V peak- to- peak).

 Push the OFF button or push the CH1 button again to turn off Channel 1.

Push the CH2 button to turn on channel 2, repeat steps above.

Probe compensator connector

Ground pin

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To Compensate Probes

Perform this adjustment to match the characteristics of the probe and the channel input. This should be performed whenever attaching a probe to any input channel the first time.

1. From CH1 menu, set the Probe attenuation to 10X (press CH1 → Probe → 10X).

Set the switch to 10X on the probe and connect it to CH1 of the oscilloscope. When using the probe hook-tip, inserting the tip onto the probe firmly to ensure a proper connection.

2. Attach the probe tip to the Probe compensator connector and the reference lead

to the ground pin, Select CH1, and then press AUTO.

3. Check the shape of the displayed waveform.

Over compensated Correctly Compensated Under Compensated

Figure 1-9

Figure 1-7 Waveform compensation

4. If necessary, use a non-metallic tool to adjust the trimmer capacitor of the probe

for the flattest square wave being displayed on the oscilloscope.

5. Repeat if necessary.

WARNNING

To avoid electric shock while using the probe, be sure the perfection of the insulated cable, and do not touch the metallic portions of the probe head while it is connected with a voltage source.

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To Display a Signal Automatically

The oscilloscope has an automated feature to display the input signal best-fit. The input signal should be 50Hz or higher and a duty cycle is greater than 1%. Please take the following steps:

1. Connect a signal to the oscilloscope input channel.

2. Press AUTO.

The oscilloscope will set up VERTICAL, HORIZONTAL and TRIGGER controls automatically. You also could adjust the controls manually to get the best results if necessary.

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To Understand the Vertical System

See figure 1-8 as below, the VERTICAL Control Area contains a series of buttons and knobs, which are not only used to set CH1, CH2, math and reference waveform functions, but also to adjust vertical position and “Volts/div”.

Figure 1-8 Vertical Control

1. Press CH1, CH2, MATH, REF, then the corresponding menu, sign, waveform and

volts/div state will appear on the screen. To turn off channels, please press OFF.

2. Set vertical position of waveform display by knob.

Turning the knob, a voltage value is displayed for a short time indicating its value with respect to the ground reference located at the center of the screen. Also notice that the ground symbol on the left side of the display moves in conjunction with the knob.

Measurement hints

If the channel is DC coupled, measuring the DC component of the signal by simply noting its distance from the ground symbol. If the channel is AC coupled, the DC component of the signal is blocked, allow you to use greater sensitivity to display the AC component of the signal.

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Vertical offset back to 0 shortcut key

Turn the knob to change the vertical display position of channel and press the knob to set the vertical display position back to 0 as a shortcut key, this is especially helpful when the trace position is far out of the screen and want it to get back to the screen center immediately.

3. Set vertical “Volts/div” by knob.

Rotate to change “Volts/div”, the change will be displayed in real time at the bottom of interface. Besides, the “Volts/div” contains two forms: “Fine” and “Coarse”.

Coarse/Fine Shortcut key

The Coarse/Fine vertical control can be set by simply pressing the vertical

knob.

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1-13

To Understand the Horizontal System

See figure 1-9 as below, the HORIZONTAL Control Area contains a button and two knobs, which are not only used to set up horizontal parameters and timebase, but also to adjust horizontal position of waveforms.

Figure 1-9 Horizontal Control

1. The horizontal knob adjusts signal horizontal position on

waveform window.

Turning the horizontal knob, the waveform will move to left or right and a sign at the left-bottom of the screen will vary to show the horizontal position of the waveform.

Horizontal offset back to 0 shortcut key

Press the knob to set the horizontal offset to 0 as a shortcut key, this is especially helpful when the trigger point is far out of the screen and want it to get back to the screen center immediately.

2. Press MENU button to display “Time” menu, setting delayed state, time base

mode and trigger offset.

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1-14

Term Explanations

Trigger offset: Denotes the real position of the trigger point relative to the midpoint of the memory. In this setting, the trigger position will be changed horizontally when you turning the knob.

3. Set horizontal “s/div” by knob.

The horizontal knob changes the sweep speed in a 1-2-5 step sequence, and displays the value in the status bar. The time base ranges of the DS1000CA series is from 2ns/div* to 50s/div.

NOTE*: The speed of horizontal scan varies by different models.

Delayed Scan Shortcut key

To press the knob in the horizontal control area on the front-panel is another way to enter or exit Delayed Scan mode.

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1-15

To Understand the Trigger System

See figure 1-10 below, the TRIGGER Control Area contains a knob and three buttons, which are used to set trigger level, trigger parameters and force trigger.

Figure 1-10

Trigger Control

1. Set trigger level by knob.

A nacarat trigger line and trigger sign will move up and down when you turn the

knob, and they will disappear about 5 seconds after stop turning knob. The trigger level value will change on the screen at the same time you turn the trigger line.

2. Press MENU button in the Trigger control. A soft button menu appears on the

display showing the trigger setting choices as shown in Figure 1-11.

Trigger Level to 0 Shortcut Key

Turn the knob to change the trigger level value and press the

knob to set trigger level back to 0 as a shortcut key.

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1-16

· Press NO.1 menu button to choose Edge.

· Press NO.2 menu button to choose Source as CH1.

· Press NO.3 menu button to choose Slope as .

· Press NO.4 menu button to choose Sweep as Auto.

· Press NO.5 menu button to enter secondary menu of Set Up.

Figure 1-11

NOTE: The trigger mode, slope and source change in conjunction with the status bar on the top-right of the screen.

3. Press 50%

The 50% button sets the trigger level to the center of the signal.

4. Press FORCE

Starts an acquisition regardless of an adequate trigger signal, usually used in “Normal” or “Single” trigger mode. This button has no effect if the acquisition is already stopped.

Local/Remote control

When the instrument is in remote mode, press FORCE to switch to local mode.

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2-1

Chapter 2 Operating Your Oscilloscope

By now, a user should understand the VERTICAL, HORIZONTAL and TRIGGER control systems and knows how to determine the system setup from the status bar of a DS1000CA-series digital oscilloscope. This chapter will go through all groups of front-panel buttons, knobs and menus; and further the knowledge of the operation by hints in this guide. It is recommended to perform all of the following exercises to get the most of the powerful measurement capabilities of the oscilloscope. If you haven‟t know the operations above, please refers to chapter 1.

This chapter covers the following topics:

 To Set Up the Vertical System ( CH1, CH2, MATH, REF, OFF, Vertical

, Vertical )

 To Set Up the Horizontal System ( MENU, Horizontal , Horizontal

)

 To Set Up the Trigger System ( , MENU, 50%, FORCE)  To Set Up the Sampling System (Acquire)  To Set Up the Display System (Display)  To Store and Recall Waveforms or Setups (Storage)  To Set Up the Utility (Utility)  To Measure Automatically (Measure)  To Measure with Cursors (Cursor)  To Use Run Control Buttons (AUTO, RUN/STOP)

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2-2

To Set Up the Vertical System

Two analog channels are provided by DS1000CA: CH1 and CH2. Press the corresponding button on the front panel to turn the channels on/off. The backlight indicates the channel is currently active. Press the button again to turn the channel off. When channel is currently selected, press OFF will turn it off and the backlight goes off.

Table 2-1 The Channels menu

Channel Mode

Settings

Status Indicator

Channel 1 (CH1)

ON Selected OFF

CH1 (yellow letter)

CH1 (black letter) No indicator

Channel 2 (CH2)

ON Selected OFF

CH2 (blue letter)

CH2 (black letter) No indicator

MATH

ON Selected OFF

MATH (purple letter)

MATH（black letter） No indicator

All functions applied will base on operating the instrument with channels, so MATH and REF can be regarded as relatively isolated channels.

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2-3

Knobs Explanations

Use the vertical controls to display signal waveforms by adjusting the vertical

and , and setting the input parameters.

1. Using vertical knob

The vertical control changes the vertical position of signal waveforms in all channels (including MATH and REF). The resolution changes according to the vertical level set. Pressing this knob will clear the channel offset to zero.

2. Using vertical knob

The vertical control changes the vertical sensitivity of signal waveforms in all channels (including MATH and REF). If the Volts/Div is set to

“Coarse”, the waveform scales in a 1-2-5 step sequence from 2 mV to 10 V. If the Volts/Div is set to “Fine”, it scales to small steps between the coarse settings.

3. Channels would be adjustable by the vertical and only

when they are selected.

4. During the vertical positioning, a position message is displayed on the left

bottom of the screen, in the same color as the corresponding channel. The unit is V (Volts).For instance: POS: 32.4mV Colours of words and channel waveform are the same, the unit is V.

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2-4

Channel Settings

Each channel of DS1000CA has an operation menu and it will pop up after pressing CH1 or CH2 button. Take CH1 as an example, the settings of all items in the menu are shown in the table below.

Figure 2-1 Table 2-2 The Channel menu (Page 1/2)

Settings

Comments

Coupling

GND

Block the DC component of the input Signal. Pass both AC and DC components of the input signal Disconnect the input signal.

BW Limit

OFF

Limit the channel bandwidth to 20MHz to reduce display noise. Get full bandwidth.

Probe

1X 5X 10X 50X 100X 500X 1000X

Set this to match the probe attenuation factor to make the vertical scale readout correct.

Digital filter

Setup digital filter (See table 2-5).

1/2

Go to the next menu page (The followings are the same, no more explanation).

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2-5

Figure 2-2 Table 2-3 The Channel menu (Page 2/2)

Settings

Comments

2/2

Back to the previous menu page (The followings are the same, no more explanation).

Volts/Div

Coarse Fine

Define a 1-2-5 sequence. To change the resolution to small steps between the coarse settings.

Invert

ON OFF

Turn on the invert function. Restore to original display of the waveform.

Unit

V/ A/ W/ U

Set “V”, “A”, “W” or “U” as the unit of

vertical channel.

Input

50Ω* 1MΩ

Press this key to select the input resistance to 50Ω or 1MΩ.

NOTE*: This parameter is for DS1202CA and DS1302CA only.

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2-6

1. Channel coupling

To use CH 1 as an example, input a sine wave signal with DC shift.

Press CH1→Coupling→AC to set “AC” coupling. It will pass AC component blocks the DC component of the input signal.

Figure 2-3 AC coupling setting

Press CH1→Coupling→DC, to set “DC” coupling. It will pass both AC and DC components of the input signal.

Figure 2-4 DC coupling setting

DC Coupling Setup

DC Coupling Status Symbol

AC Coupling Setup

AC Coupling Status Symbol

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2-7

Press CH1→Coupling→GND, to set “GND” coupling, it disconnects the input signal.

Figure 2-5 GND coupling setting

GND Coupling

GND Coupling Status Symbol

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2-8

2. Set up the channel bandwidth limit

Take CH1 for an example, input a signal containing high frequency component.

Press CH1→BW Limit→OFF, to set up bandwidth limit to “OFF” status. The oscilloscope is set to full bandwidth and passing the high frequency component in the signal.

Figure 2-6 Turn off the BW limit

Press CH1→BW Limit→ON, to set up bandwidth limit to “ON” status. It will reject the frequency component higher than 20MHz.

Figure 2-7 Turn on the BW limit

Turn Off the BW Limit

Mark of BW Limit

20M BW Limit

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3. Probe Attenuation Setting

The oscilloscope allows selecting the attenuation factor for the probe. The attenuation factor changes the vertical scaling of the oscilloscope so that the measurement results reflect the actual voltage levels at the probe tip. To change (or check) the probe attenuation setting, press the CH1 or CH2 button (according to which channel in using). Toggle the Probe soft button to match the attenuation factor of the probe. This setting remains in effect until changed again.

Figure 2-8 show an example for using a 1000:1 probe and its attenuation factor.

Figure 2-8 Setting probe attenuation

Table 2-4 Probe setting

Probe attenuation factors

Corresponding settings

1:1

5:1

10:1

10X

50:1

50X

100:1

100X

500:1

500X

1000:1

1000X

Vertical Volts/div

Probe Attenuation

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4. Digital Filter

Press CH1→Digital filter, display the digital filter menu.

Figure 2-9 Turn off digital filter

Figure 2-10 Turn on digital filter

Turn off Digital Filter

Mark of Digital Filter

Turn on Digital Filter

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Turn ( ) knob to set high and low limit of frequency.

Figure 2-11 Table 2-5 The Filter menu

Settings

Comments

Digital Filter

Off On

Turn off the digital filter. Turn on the digital filter.

Filter Type

Setup as LPF (Low Pass Filter). Setup as HPF (High Pass Filter). Setup as BPF (Band Pass Filter). Setup as BRF (Band Reject Filter).

Upper limit

Turn ( ) knob to set high limit.

Lower limit

Turn ( ) knob to set low limit.

Back to higher level menu (The followings are the same, no more explanation).

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5. Volts/Div settings

The Volts/Div control has Coarse or Fine configuration. The Vertical Sensitivity is 1mv/div ~10V/div.

Coarse: It is the default setting of Volts/Div in a 1-2-5 step sequence from 1mV/div, 2mV/div, 5mV/div, 10mV/div to10 V/div.

Fine: This setting changes the vertical scale to small steps between the coarse settings. It will be helpful to adjust the waveform in smooth steps.

Figure 2-12 Fine configurations

Coarse/Fine Shortcut key

To change Coarse/Fine setting, not only by menu but also by pressing vertical knob.

Fine Adjustment

Fine Adjustment Data

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6. To invert a waveform

Invert turns the displayed waveform 180 degrees, as respect to the ground level. When the oscilloscope is triggered on the inverted signal, the trigger is also inverted. Figure 2-13 and 2-14 show the changes before after the inversion respectively.

Figure 2-13

The waveform before inversion

Figure 2-14

The waveform after inversion

Invert Off

Invert On

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Math functions

The mathematic functions include “Add”, “Subtract”, “Multiply” and “FFT” for Channel 1 and Channel 2. The mathematic result can be measured by the grid and the cursor.

Press MATH button to enter “Math” menu, meanwhile, sign of math scale will appear under the screen. See figure below, waveform of channel1 is marked yellow, waveform of channel2 is marked blue, and waveform of channel1 adding channel2 is marked purple.

Figure 2-15 The Math function

Figure 2-16 Table 2-6 The Math menu

Settings

Comments

Operation

A+B A-B A× B FFT

Add source A and source B. Subtract source B from source A. Multiply source B by source A. Fast Fourier Transform.

Source A

CH1 CH2

Define CH1 or CH2 as source A.

Source B

CH1 CH2

Define CH1 or CH2 as source B.

Invert

ON OFF

Invert the MATH waveform. Restore to original waveform display.

MATH scale

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1. FFT Analyse

The FFT (Fast Fourier Transform) process converts a time-domain signal into its frequency components mathematically. FFT waveforms are useful in the following applications:

 Measuring harmonic content and distortion in systems  Characterizing noise in DC power supplies  Analyzing vibration

Press MATH→Operate→FFT to enter FFT setting menu.

Figure 2-17 Table 2-7 The FFT menu

Settings

Comments

Operate

A+B A-B A× B FFT

Add source A to source B. Subtract source B from source A. Multiply source B by source A. Fast Fourier Transform.

Source

CH1 CH2

Define CH1 or CH2 as FFT source.

Window

Rectangle Hanning Hamming Blackman

Select window for FFT. Display

Split Full screen

Display FFT waveform on half screen. Display FFT waveform on full screen.

Scale

RMS

dBV

RMS

Set “V

RMS

” as vertical unit.

Set “dBV

RMS

” as vertical unit.

Key points for FFT

1. Signals that have a DC component or offset can cause incorrect FFT

waveform component magnitude values. To minimize the DC component, choose AC Coupling on the source signal.

2. To reduce random noise and aliases components in repetitive or

single-shot events, set the oscilloscope acquisition mode to Average.

3. To display FFT waveforms with a large dynamic range, use the dBV

RMS

scale. The dBV

RMS

scale displays component magnitudes using a log scale.

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2. Selecting an FFT Window

Oscilloscope record the FFT change for a limit time assume that YT waveform repeat ceaselessly. If cycle is integer, YT waveform voltage is the same at starting and ending point, and waveform is consecutive. Contrary, If cycle is non-integer, the voltage is different at starting and ending point, leading to the high frequency instantaneous intermit, which is called “leak”. To avoid leak, multiply a window function to force the value is 0 at starting and ending point.

DS1000CA provides four FFT functions with different feature, which are need to be selected according to measuring waveform.

Table 2-8 FFT Windows

Window

Features

Best for measuring

Rectangle

Best frequency resolution worst magnitude resolution. This is essentially the same as no window.

Transients or bursts, the signal levels before and after the event are nearly equal. Equal-amplitude sine waves with fixed frequencies. Broadband random noise with a relatively slow varying spectrum.

Hanning

Better frequency, poorer magnitude accuracy than Rectangular.

Sine, periodic, and narrow-band random noise.

Hamming

Hamming has slightly better frequency resolution than Hanning.

Transients or bursts where the signal levels before and after the events are significantly different.

Blackman

Best magnitude, worst frequency resolution.

Single frequency waveforms, to Find higher order harmonics.

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Term Explanations

FFT Resolution: The quotient between sampling rate and number of FFT

points. With a fixed FFT points, the lower sampling rate results in better resolution.

Nyquist Frequency

The highest frequency that any real-time digitizing oscilloscope can acquire

without aliasing. It‟s normally half of the sample rate. This frequency is called

the Nyquist frequency. Frequency above the Nyquist frequency will be under sampled, causing a situation known as aliasing.

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REF function

Reference Waveforms are saved waveforms to be selected for display. The reference function will be available after saving the selected waveform to non-volatile memory.

Press REF button to display the Reference waveform menu.

Figure 2-18 Table 2-9 REF menu when using internal memory

Settings

Comments

Source

CH1 CH2 MATH/FFT

Select channel 1 as REF channel.

Select channel 2 as REF channel.

Select MATH/FFT as REF channel.

Location

Internal External

Select memory location in scope. Select memory location out scope.

Save

Save REF waveform

Imp./Exp.

Go to import/export menu (see table 2-11).

Reset

Reset REF waveform.

Figure 2-19 Table 2-10 REF menu when using external memory

Settings

Comments

Source

CH1 CH2 MATH/FFT

Select channel 1 as REF channel.

Select channel 2 as REF channel.

Select Math/FFT as REF channel.

Location

Internal External

Select memory location in scope. Select memory location out scope.

Save

Save REF waveform to outer memory location.

Import

Go to import menu (see table 2-15).

Reset

Reset REF waveform.

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1. Import and Export

Switch in external memory and select Internal location. Then, press REF →Imp. /Exp. and go to the following interface.

Figure 2-20 Import of export the figure

Figure 2-21 Table 2-11

(a) (a) The Imp. /Exp. Menu (Files)

Note: When the explorer is set to Path, Import and Delete File are grayed out

and disabled. When the explorer is set to Directories, the menu and comments are as shown in the table below.

Settings

Comments

Explorer

Path Directories Files

Set the explorer to Path, directories or files.

Export

Export the REF file from internal memory to export memory (see table 2-12).

Import

Import the REF file to internal memory.

Delete File

Delete file.

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(b) (b) The Imp. /Exp. Menu (Directories)

Settings

Comments

Explorer

Path Directories Files

Set the explorer to Path, directories or files.

New Folder

Create a new folder under the current path.

Del Folder

Delete the folder currently selected.

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2. Export

Switch in external memory and select Internal location. Then, press REF→Imp. /Exp.→ Export and go to the following interface.

Figure 2-22 Figure export

Figure 2-23 Table 2-12 The Export menu

Settings

Comments

Move the cursor up.

Move the cursor down.

To delete chosen letter.

Save

Execute the operation.

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3. Save to External memory

Switch in external memory and select External location. Then, press REF→Save and go to the following interface.

Figure 2-24 Save the figure

Figure 2-25 Table 2-13 The Save menu

Settings

Comments

Explorer

Path Directories Files

Switch among Path, Directories and Files.

New File (Folder)

Set up new file in Path and Files. Set up new folder in Directories.

Delete File (Folder)

Delete file (folder).

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4. New File (or New Folder)

Switch in external memory and select External location. Then, press REF→Save→New File (or New Folder) and go to the following interface.

Figure 2-26 Input interface

Figure 2-27 Table 2-14 The New File menu

Settings

Comments

Move the cursor up.

Move the cursor down.

To delete chosen letter.

Save

Execute the operation.

Character Window

Switch Capital On/Off

Switch Chinese/English

Spell Key In

File Name Key In

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5. Import

Switch in external memory and select External location. Then, press REF→Import and go to the following interface.

Figure 2-28 Figure import

Figure 2-29 Table 2-15 The Import menu

Settings

Comments

Explorer

Path Directories Files

Switch among Path, Directories and Files.

Import

Import the REF file into internal memory.

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6. Display a Reference Waveform

Figure 2-30 Reference waveform display

Operation Explanations:

1. Push REF button to show the reference waveform menu.

2. Press soft button 1 to select the reference channel: CH1, CH2, MATH/FFT.

3. Turn vertical and vertical to adjust the REF waveform

to a suitable position.

4. Press soft button No.2 to select the save location of REF waveform.

5. Press soft button No.3 to save the waveform as REF.

NOTE: The Reference function is not available in X-Y mode.

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To Set Up the Horizontal System

Press MENU button to enter the horizontal setting system.

Figure 2-31 Table 2-16 The Horizontal menu

Settings

Comments

Delayed

ON OFF

Turn on Delayed Scan mode. Turn off the Delayed Scan mode.

Time Base

Y-T

X-Y

Roll

[1]

Y-axis indicates vertical voltage, X-axis indicates horizontal time. Y-axis indicates voltage of CH2, X-axis indicates voltage of CH1. The waveform display updates from right to left.

Trig-offset Reset

Reset

Adjust to the center.

NOTE:

[1] No trigger or horizontal offset control of waveforms is available

during Roll Mode, and it‟s only available when set to 500ms/div or slower.

Term Explanations:

Slow Scan Mode: This mode is available when the horizontal time base is

set to 50ms or slower. In this mode, the oscilloscope acquires sufficient data for the left part to the trigger point, then wait for trigger, when trigger occurs, it continue to draw the rest part from the trigger point to the end of the right side. When choosing this mode to view low frequency signals, it is recommended that the channel coupling should be set as DC.

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The Horizontal Knobs

The horizontal controls change the horizontal scale and position of waveforms. The horizontal center of the screen is the time reference for waveforms. Changing the horizontal scale causes the waveform to expand or contract with respect to the screen center. Horizontal position changes the displayed waveform position, relative to the trigger point.

1. Horizontal knob is used to adjust the horizontal position of all

channel (include Math) waveforms. The resolution of this control varies with the time base. Pressing this button clears trigger offset and moves the trigger point to the horizontal center of the screen.

2. Horizontal is used to select the horizontal time/div (scale factor) for

the main or the Delayed Scan time base. When Delayed Scan is enabled, it changes the width of the window zone by changing the Delayed Scan time base.

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Delayed Scan

The Delayed Scan is a magnified portion of the main waveform window. Use Delayed Scan to locate and horizontally expand part of the main waveform window for a more detailed (higher horizontal resolution) analysis of signal. The Delayed Scan time base setting cannot be set slower than the Main time base setting.

Press MENU→Delayed→ON, or press horizontal knob to turn on delayed scan function. See the waveform below.

Figure 2-32 Delayed Scan windows

The screen splits into two parts as above: The upper half displays the main waveform window and the lower half displays an expanded portion of the main waveform window. This expanded portion of the main window is called the Delayed Scan window. Two blocks shaded at the upper half; the un-shaded portion is expanded in the lower half. The horizontal and

knobs control the size and position of the Delayed Scan. The value at bottom of the screen is the main time base and the value on the center bottom means the Delayed Scan time.

Waveform to be Horizontally Expanded

Expanded Waveform in Horizontal Main Timebase

Time Base of Delayed Scan

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X-Y Format

This format is useful for studying phase relationships between two signals. CH1 in the horizontal axis(X) and CH2 in the vertical axis(Y), the oscilloscope uses a none-trigger acquisition mode, data is displayed as dots.

Press MENU→Time Base→X-Y to enter X-Y mode.

Figure 2-33 X-Y display format

The oscilloscope could capture waveform with arbitrary sample rate in Y-T mode (2GSa/s maximum for single channel, 1GSa/s maximum for double channels). While, in X-Y mode, the sample rate is up to 500MSa/s. Generally, the sample rate is more lower, the Lissajous graphics is more better.

The following modes or functions will not work in X-Y format.

 Cursor Measurements  Pass/Fail Test  REF or MATH Operations  Delayed Scan Mode  Vector Display Mode  Horizontal knob  Trigger Controls

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To Set Up the Trigger System

The trigger determines when the oscilloscope starts to acquire data and display a waveform. When a trigger is set up properly, it can convert unstable displays or blank screens into meaningful waveforms.

When the oscilloscope starts to acquire a waveform, it collects enough data so that it can draw the waveform to the left of the trigger point. The oscilloscope continues to acquire data while waiting for the trigger condition to occur. After it detects a trigger, the oscilloscope continues to acquire enough data so that it can draw the waveform to the right of the trigger point.

Press MENU button to enter trigger system setting interface.

Figure 2-34 Trigger controls

DS1000CA provides five trigger modes: Edge, Pulse, Slope, Video and Alternative.

Edge: An edge trigger occurs when the trigger input passes through a specified voltage level in the specified slope direction.

Pulse: Use this trigger type to catch pulses with certain pulse width. Video: Use video trigger on fields or lines for standard video signals. Slope: The oscilloscope begins to trigger according to the signal rising or falling

speed. Alternative: Trigger on non-synchronized signals.

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Edge Trigger

An edge trigger determines whether the oscilloscope finds the trigger point on the rising or the falling edge of a signal. Select Edge trigger Mode to trigger on Rising

edge, falling edge or rising & falling edge.

Press MENU→Mode→Edge to enter the following menu.

Figure 2-35 Table 2-17 The Trigger menu

Settings

Comments

Source

CH1 CH2 EXT EXT/5

AC Line

Select CH1 as trigger signal. Select CH2 as trigger signal. Select EXT TRIG as trigger signal. Select attenuated EXT TRIG/5 as trigger signal. Select power line as trigger signal.

Slope

Trigger on rising edge. Trigger on falling edge. Trigger on both ring & falling edge.

Sweep

Auto Normal Single

Acquire waveform even no trigger occurred. Acquire waveform when trigger occurred. When trigger occurs, acquire one waveform then stop.

Set up

To go to Set Up menu, see table 2-32

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Pulse Width Trigger

Pulse trigger occurs according to the width of pulse. The abnormal signals can be

detected through setting up the pulse width condition.

Press MENU→Mode→Pulse to enter the following menu.

Figure 2-36 Table 2-18 The Trigger menu (Page 1/2)

Settings

Comments

Source

CH1 CH2 EXT

EXT/5

Selects CH1 as trigger signal. Select CH2 as trigger signal. Select EXT TRIG as trigger signal. Select attenuated EXT TRIG/5 as trigger signal.

When

Set Pulse width as “+pulse width less than” Set Pulse width as “+pulse width more than” Set Pulse width as “+pulse width equal to” Set Pulse width as “-pulse width less than” Set Pulse width as “-pulse width more than” Set Pulse width as “-pulse width equal to”

Settings

<Width>

Set required pulse width.

Figure 2-37 Table 2-19 The Trigger menu (Page 2/2)

Settings

Comments

Sweep

Auto Normal Single

Acquire waveform even no trigger occurred. Acquire waveform when trigger occurred. When trigger occurs, acquire one waveform and then stop.

Set Up

To go to Set Up menu, see table 2-32.

NOTE: The adjustable range of Pulse width is 20ns to 10s. When the condition is met, it will trigger and acquire the waveform.

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Video Trigger

Choose video trigger to trigger on fields or lines of NTSC, PAL, or SECAM standard video signals. Trigger coupling preset to DC.

Press MENU→Mode→Video to enter the following menu.

Figure 2-38 Table 2-20 The Video Trigger menu (Page 1/2)

Settings

Comments

Source

CH1 CH2 EXT EXT/5

Selects CH1 as trigger source. Select CH2 as trigger source. Select EXT TRIG as trigger source. Select EXT TRIG/5 as trigger source.

Polarity

Normal polarity

Inverted polarity

Trigger on the negative edge of the sync pulse

Trigger on the positive edge of the sync pulse

Sync

All Lines Line Num Odd field Even field

Trigger on all lines. Trigger on an specified line. Select to trigger on odd field. Select to trigger on even field.

Note*: normal polarity is applicable to signal with negative horizontal sync pulse;

inverted polarity is applicable to signal with positive horizontal sync pulse.

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Figure 2-39 Table 2-21 The Video Trigger menu (Page 2/2, when Sync is set as the

specified line)

Settings

Comments

Line Num

Specify the line on which the oscilloscope

triggers. The range of the line number available is from 1 to 525 (NTSC) or from 1 to 625 (PAL/SECAM).

Standard

PAL/SECM NTSC

Select Video standard.

Sweep

Auto

Normal

Single

Force the oscilloscope to trigger in the absence of trigger condition. Lets oscilloscope to trigger in the suitable trigger condition. Lets oscilloscope to trigger one time in the suitable trigger condition, and then stop.

Set Up

To go to set up menu, see table 2-33.

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Figure 2-40 Table 2-22 The Video Trigger menu (When the Sync is set as All lines,

Odd field and Even field)

Select “Line Synchronization”: Select “Filed Synchronization”:

Figure 2-41 Figure 2-42

Video Trigger: Line Synchronization Video Trigger: Field Synchronization

Settings

Comments

Standard

PAL/SECAM NTSC

Select Video standard.

Sweep

Auto

Normal

Single

Set Up

To go to set up menu, see table 2-33.

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Slope Trigger

Slope trigger sets the oscilloscope as the positive/negative slope trigger within the specified time.

Press MENU→Mode→Slope to enter the following menu.

Figure 2-43 Table 2-23 The Slope Trigger menu (Page 1/2)

Settings

Comments

Source

CH1 CH2 EXT EXT/5

Set channel 1 as trigger source. Set channel 2 as trigger source. Set EXT. channel as trigger source. Set EXT/5 as trigger source.

When

Set slope condition as “+slope more than”

Set slope condition as “+slope less than”

Set slope condition as “+slope equal to”

Set slope condition as “-slope more than”

Set slope condition as “-slope less than”

Set slope condition as “-slope equal to”

Time <Time Set>

Set slope time.

Figure 2-44 Table 2-24 The Slope Trigger menu (Page2/2)

Settings

Comments

Vertical

Select the level that can be adjusted by

Sweep

Auto

Normal

Single

Force the oscilloscope to trigger in the

absence of trigger condition.

Lets oscilloscope to trigger in the suitable

trigger condition.

Lets oscilloscope to trigger one time in the

suitable trigger condition, then stop.

Set Up

To go to set up menu. See Table 2-32.

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NOTE: Slope time can be set from 20ns to 10s. When a signal meets the trigger condition, scope will execute the acquisition. You can adjust LEVEL A/ LEVEL B or both simultaneous by turning the knob.

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Alternative Trigger

When alternative trigger is on, the trigger sources come from two vertical channels. This mode can be used to observe two non-related signals. You can choose two different trigger modes for the two vertical channels. The options are as follows: Edge, Pulse, Slope and video. The info of the trigger level of the two channels will be displayed on the upper-right of the screen.

Press MENU→Mode→Alternative to enter the following menu.

Figure 2-45 Table 2-25 The Alternative menu (Trigger Type: Edge)

Settings

Comments

Select

CH1

CH2

Set trigger mode for Channel 1.

Set trigger mode for Channel 2.

Type

Edge

Set Edge Trigger as the trigger type.

Slope

Trigger on rising edge.

Trigger on falling edge.

Trigger on both ring & falling edge.

Set Up

To go to set up menu. See Table 2-32.

Figure 2-46 Table 2-26 The Alternative menu (Trigger Type: Pulse Page 1/2)

Settings

Comments

Select

CH1

CH2

Set trigger mode for Channel 1.

Set trigger mode for Channel 2.

Type

Pulse

Set Pulse Trigger for the channel.

When

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Figure 2-47 Table 2-27 The Alternative menu (Trigger Type: Pulse Page 2/2)

Men

Settings

Comments

Setting

Set the width of the pulse.

Set Up

To go to set up menu. See Table 2-32.

Figure 2-48 Table 2-28 The Alternative menu (Trigger Type: Slope Page 1/2)

Settings

Comments

Select

CH1 CH2

Set trigger mode for Channel 1.

Set trigger mode for Channel 2.

Type

Slope

Set Slope Trigger for the vertical channel.

When

Set slope condition as “+slope more than”

Set slope condition as “+slope less than”

Set slope condition as “+slope equal to”

Set slope condition as “-slope more than”

Set slope condition as “-slope less than”

Set slope condition as “-slope equal to”

Figure 2-49 Table 2-29 The Alternative menu (Trigger Type: Slope Page 2/2)

Settings

Comments

Time

Set slope time.

Vertical

Select the level to be adjusted by

Set Up

To go to set up menu. See Table 2-32

and table 2-33.

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Figure 2-50 Table 2-30 The Alternative menu (Trigger Type: Video Page 1/2)

Settings

Comments

Select

CH1 CH2

Set trigger mode for CH1.

Set trigger mode for CH2.

Type

Video

Video Trigger for the channel.

Polarity

Normal polarity Inverted polarity

Trigger on the negative edge

of the sync pulse

Trigger on the positive edge of

the sync pulse

Note*: normal polarity is applicable to signal with negative horizontal sync pulse;

inverted polarity is applicable to signal with positive horizontal sync pulse.

Figure 2-51 Table 2-31 The Alternative menu (Trigger Mode: Video Page 2/2)

Settings

Comments

Sync

ALL lines

Line Num

Odd field

Even field

Trigger on all lines.

Trigger on an specified line.

Select to trigger on odd field or even

field.

Line Num

Select the specified line number for

sync.

Standard

PAL/SECM

NTSC

Select Video standard.

Set Up

To go to set up menu. See Table

2-33.

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Trigger Settings

Set up different trigger settings according to different trigger modes. When in the mode of Edge and Pulse, only Holdoff is adjustable. When source is non-digital channel and in slope trigger, only trigger coupling, trigger sensitivity and Holdoff can be set. For video trigger, Sensitivity and Holdoff can be set.

Figure 2-52 Table 2-32 The Trigger Set Up menu (Settings for trigger coupling,

trigger sensitivity and holdoff)

Figure 2-53 Table 2-33 The Trigger Set Up menu (Settings for sensitivity and holdoff)

Settings

Comments

Sensitivity

Set trigger sensitivity.

Holdoff

Set time slot before another

trigger event.

Holdoff

Reset

Reset Holdoff time to 500ns.

Settings

Comments

Coupling

HF Reject

LF Reject

Allow all signals pass.

Block DC signals.

Reject high frequency signals.

Reject DC and low frequency

signals.

Sensitivity

Set trigger sensitivity and the

range is from 0.10div to

1.00div.

Holdoff

Set time slot before another

trigger event and the range is

from 500ns to 1.50s.

Holdoff

Reset

Reset Holdoff time to 500ns.

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Trigger Holdoff

Use trigger Holdoff to stabilize a complex waveform, such as a pulse range. Holdoff time is the oscilloscope‟s waiting period before starting a new trigger. During Holdoff, oscilloscope will not trigger until Holdoff ends. For instance: To trigger on the first pulse on a group of them, users can set the holdoff time to Pulse cluster width.

Figure 2-54 Trigger Holdoff

Operation Explanations:

1 Press the trigger MENU button to display the Menu. 2 Press Set Up key to display trigger set up menu. 3 Turn the multi function knob ( ) to change Holdoff time until waveform is

stable.

4 Pushing Trigger Hold off reset to reset the Holdoff time to its default value.

Time of Holdoff

Trigger Position

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Trigger Terms Explanation

1. Trigger Source:

Trigger occurs from several sources: Input channels (CH1 and CH2), AC Line, Ext, Ext/5.

 Input Channels:

It is the most commonly used trigger source. The channel works when selected as a trigger source whatever displayed.

 Ext Trig:

The instrument can be triggered from a third source while acquiring data from CH1 and CH2. For example, to trigger from an external clock or with a signal from another part of the test circuit. The Ext, Ext/5 trigger sources use an external trigger signal connected to the EXT TRIG connector. Ext uses the signal directly; it has a trigger level range of +1.6 V to -1.6 V. The EXT/5 trigger source attenuates the signal by 5X, which extends the trigger level range to +8 V to -8 V allowing the oscilloscope to trigger on a larger signal.

 AC Line:

AC power can be used to display signals related to the power line frequency, such as lighting equipment and power supply devices. The oscilloscope gets triggered on its AC power input, an AC trigger signal is not required.

2. Sweep Mode:

The sweep mode determines how the oscilloscope behaves in the absence of a trigger event. The oscilloscope provides three trigger modes: Auto, Normal, and Single.

 Auto:

This sweep mode allows the oscilloscope to acquire waveforms even when it does not detect a trigger condition. If no trigger condition occurs while the oscilloscope is waiting for a specific period (as determined by the time-base setting), it will force itself to trigger.

When forcing invalid triggers, the oscilloscope cannot synchronize the waveform, and the waveform seems to roll across the display. If valid triggers

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occur, the display becomes stable on the screen. Any factor results in the un-stability of waveforms can be detected by Auto Trigger, such as the output of Power supply. NOTE: When horizontal control is set under 50 ms/div, Auto mode allows the oscilloscope not to capture trigger signal.

 Normal:

The Normal mode allows the oscilloscope to acquire a waveform only when it is triggered. If no trigger occurs, the oscilloscope keeps waiting, and the previous waveform, if any, will remain on the display.

 Single:

In Single mode, after pressing the RUN/STOP key, the oscilloscope waits for trigger. While the trigger occurs, the oscilloscope acquires one waveform then stop.

3. Coupling:

Trigger coupling determines which signal component passing to the trigger circuit. Coupling types include AC, DC, LF Reject and HF Reject.

 AC: AC coupling blocks DC components.  DC: DC coupling passes both AC and DC components.  LF Reject: LF Reject coupling blocks DC component, and attenuates all signal

with a frequency lower than 8 kHz.

 HF Reject: HF Reject coupling attenuates all signals with a frequency higher

than 150 kHz.

4. Pre-trigger/delayed trigger:

The data collected before and after trigger. The trigger position is typically set at the horizontal center of the screen. In the full-screen display the 6div data of pre-trigger and delayed trigger can be surveyed. More data (14div) of pre-trigger and 1s delayed trigger can be surveyed by adjusting the horizontal knob. This feature is very useful to study the events that led up to the trigger point.

Everything to the right of the trigger point is called post-trigger information. The delay range (pre-trigger and post-trigger information) depends on the sweep speed selected.

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5. Adjustable trigger sensitivity:

To avoid the influence of noise from the physical world, and get the stable trigger, the trigger circuit has adopted Stickiness. In DS1000CA series, the stickiness is adjustable from 0.1div-1.0div, which means when it sets to 1.0div, the trigger circuit will not affect any signal with peak-peak amplitude less than 1.0div, so as to avoid the influence of the noise.

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To Set Up the Sampling System

Figure 2-55 shows the menu button for acquire system on the front panel.

Figure 2-55 Acquire button

Press Acquire button, the interface menu shows as follows:

Figure 2-56 Table 2-34 The Acquire menu

Settings

Comments

Acquisition

Normal

Average

Peak Detect

Normal Acquisition mode.

Average Acquisition mode.

Peak Detect Acquisition mode.

Averages

[1]

2 to 256

Step by 2 N times the power. Set

average times from 2 to 256.

Sampling

Real-Time

Equ-Time

Real-time sampling mode.

Equivalent sampling mode.

Sinx/x

[2]

OFF

Set the insert mode is Sinx or

Line.

Sa Rate

[3]

Display sampling rate.

NOTES:

[1] This function appears when acquisition as “Average”. [2] This function appears when sampling as “Real-Time”. [3] Sample rate of CH1 and CH2 will be displayed respectively in alternative trigger

mode.

Acquire Setup Button

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The waveform displayed on the screen will change in conjunction with the setting of Acquire menu.

 To reduce the displayed random noise, select the Average Acquisition. This

mode would make the screen refresh slower.

 To Avoid signal aliasing, select Peak Detect Acquisition.  Select Real-time acquisition to observe the single-shot or pulse signals.  Select Equ-Time to observe high frequency repetitive signals.

Figure 2-57

Signal that contains noise, and without average sampling

Figure 2-58

Display signal after average sampling

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Figure 2-59

Adopt Normal acquisition

Figure 2-60

Adopt peak detect acquisition, signal contains envelope

Key points

Stop Acquisition: When the scope is acquiring waveforms, the

waveforms is in a live status; when acquisition is stopped, frozen waveform

will be displayed, the position and scale can still be adjusted by vertical

control and horizontal control.

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Term Explanations

Real-time Sampling: DS1000CA has Real-time sampling rate up to

2GSa/s. At the time base 20ns or faster, the oscilloscopes use the sine(x)/x

interpolation to expand the horizontal time base.

Equivalent sampling: Known as Repetitive sampling to get up to 20ps of

horizontal resolution (equivalent 50Gsa/s). This mode is good for observing

repetitive signals, and it is not recommended for single-shot or pulse.

Normal Acquisition: Oscilloscope acquires signal by equal time interval.

Average Acquisition: Apply averaging to your signal to remove

uncorrelated noise and improve measurement accuracy. Reduces random

or uncorrelated noise in the signal display. The averaged waveform is a

running average over a specified number of acquisitions from 2 to 256.

Peak Detect: Peak Detect mode captures the maximum and minimum

values of a signal. Finds highest and lowest record points over many

acquisitions.

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To Set Up the Display System

Figure 2-61 shows the menu button for the display system on the front panel.

Figure 2-61 Display button

Press the Display button, the interface menu for settings shows as follows.

Figure 2-62 Table 2-35 The Display menu (Page 1/3)

Setting

Comments

Type

Vectors

Dots

Display waveforms as vectors.

Display waveforms as dots.

Clear

Clear all existing waveforms from

screen.

Persist

OFF

Infinite

Turn off the persistence function.

The sample points remain displayed

until turn the persistence “OFF”.

Intensity

Set up waveform intensity

(0%~100%).

Key points

Display type: Display type includes Vector and Dot. In vectors type,

oscilloscope connects dots through digital interpolation including both linearity

and sin(x)/x. Sin(x)/x interpolation is suitable for Real-time sampling and will

be more effective at 50ns or faster time base.

Display Setup Button

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Figure 2-63 Table 2-36 The Display menu (Page 2/3)

Settings

Comments

Function

Normal

Intensity

The waveform is displayed at the

same intensity.

The intensity of waveforms is

connecting to probability.

Grid

Display grids and coordinates on the

screen.

Turn off the grids.

Turn off the grids and coordinates.

Display

10s

20s

Infinite

Set the time before menu fades away.

The menu will be hidden after the set

time of last button pressing.

Figure 2-64 Table 2-37 The Display menu (Page 3/3)

Settings

Comments

Brightness

Set up grid brightness.

Screen

Normal

Inverted

Set to normal mode.

Set to invert color display mode.

Term Explanations

Refresh rate: It is an important performance of digital oscilloscopes. It means

the number of display refreshing per second and it will affect the ability to

observe signal.

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Adjusting waveform intensity

Default setup of multi-function knob ( ) is adjusting waveform intensity.

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To Store and Recall Waveforms or Setups

Figure 2-65 shows the menu button for the storage system on the front panel.

Figure 2-65 Storage button

Press the Storage button, the interface menu for settings shows as follows.

Figure 2-66 Table 2-38 The Storage menu (Waveform or Setups storage)

Settings

Comments

Storage

[1]

Waveform

[2]

Setups

Bit map

CSV

Factory

Store or recall waveform.

Store or recall instrument setups.

Create or delete bit map files.

Create or delete CSV files.

Recall factory setups.

Internal

Go to menu for internal memory

operation (see Table 2-42).

External

Go to menu for external memory

operation (see Table 2-43).

Disk Mana.

Go to disk manage menu (see

Table 2-44).

NOTES:

[1] The waveform and setups files in internal memory can be saved, loaded and

deleted. While, the waveform, setups, bit map and CSV files in external memory can be created and deleted. To restore the factory settings, please select “Factory”.

[2] Both waveforms and status settings could be saved in “Waveform Storage”.

Storage Setup Button

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Figure 2-67 Table 2-39 The Storage menu (Bit Map storage)

Settings

Comments

Storage

Bit map

Create or delete bit map files.

Para Save

Off

Save the current oscilloscope

settings in different format with the

same file name.

External

Go to menu for external memory

operation (see Table 2-43).

Disk Mana.

Go to disk manage menu (see Table

2-44).

Figure 2-68 Table 2-40 The Storage menu (CSV storage)

Settings

Comments

Storage

CSV

Create or delete CSV files.

Data

Depth

Displayed

Maximum

Save currently displayed waveform

data to CSV file.

Save the whole waveform data in

memory to CSV file.

Para Save

Off

Save the current oscilloscope

settings in different format with the

same file name.

External

Go to menu for external memory

operation (see Table 2-43).

Disk Mana.

Go to disk manage menu (see Table

2-44).

Figure 2-69 Table 2-41 The Storage menu (Factory storage)

Settings

Comments

Storage

Factory

Recall factory setups.

Load

Recall factory setups or files.

Disk Mana.

Go to disk manage menu (see Table

2-44).

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Internal Memory

Press Storage→Internal to go to the following menu.

Figure 2-70 Table 2-42 The Internal Memory menu

Settings

Comments

Internal

Int_00 (S)

Int_01 (S)

Int_09 (N)

Set up the location of files in

internal memory among Int_00 to

Int_09. Thereinto, S in brackets

indicates the location has storage

file, N indicates has not.

Load

Recall waveform files and setup

files from the internal memory

location.

Save

Save waveform files and setup

files to the internal memory

location.

Delete File

Delete the files

NOTE: To ensure the setups being saved properly, only after the settings are changed for more than 5 seconds can the user turn off the instrument. The oscilloscope can store 10 settings permanently and can restore at anytime.

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External Memory

Switch in external memory, press Storage→ External to go to the following menu.

Figure 2-71 File system

Figure 2-72 Table 2-43 The External Memory menu

Settings

Comments

Explorer

Path

Directory

File

Switch among Path, Directory and File.

New File

(Folder)

To create new file or folder.

Delete

File

Delete file (Folder).

Load

Recall waveform and setup from USB

storage device.

Current Directory

Current Path

Files

Back to Previous

Directory

File Information

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Disk Management

Press Storage→Disk Mana. to go to the following menu.

Figure 2-73 Table 2-44 The Disk Management menu (Page 1/2)

Settings

Comments

Explorer

Path

Directory

File

Switch among Path, Directory and

File.

New folder

To create new folder (same as new

files).

Delete File

Delete file.

Load

Recall waveform, setup, recorded

waveform, Pass/Fail file.

Figure 2-74 Table 2-45 The Disk Management menu (Page 2/2)

Settings

Comments

Rename

To rename a file (see Table 2-46).

Disk info

Display disk information.

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1. Disk Information

Press Storage →Disk Mana →Diskinfo to go to the disk information interface.

Figure 2-75 Disk information interface

2. Rename

Press Storage→Disk Mana.→Rename to go to the following interface.

Figure 2-76

Rename the file

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Figure 2-77 Table 2-46 The Rename menu

Settings

Comments

To move the cursor up.

To move the cursor down.

To delete chosen letter.

Rename the file.

Key point

Factory: The oscilloscope has default settings and can be recalled at

anytime by user.

Memory location: Specify the memory location to save/recall the

waveforms and setups.

Load: Recall saved waveforms, setups and default settings.

Save: Save waveforms and setups.

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To Set Up the Utility

Figure 2-78 shows the menu button for the Utility on the front panel.

Figure 2-78 Utility button

Press the Utility button to show the menu of the settings in the Utility system.

Figure 2-79 Table 2-47 The Utility menu (Page 1/3)

Setting

Comments

I/O setting

Setup I/O configuration.

Sound

(ON)

(OFF)

Turn beeper sound on/off.

Counter

OFF

Turn off Frequency Counter.

Turn on Frequency Counter.

Language

简体中文

繁体中文

한국어

日本語

English

Deutsch

Français

Português

Русский

Espaňol

Select languages.

System Function Setup Button

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Figure 2-80 Table 2-48 The Utility menu (Page 2/3)

Settings

Comments

Pass/Fail

Setup Pass/Fail test.

Record

Setup Waveform Recorder.

Print set

Setup printing.

Figure 2-81 Table 2-49 The Utility menu (3/3)

Settings

Comments

Self-Cal

Execute Self-calibration.

Service

Go to service menu.

Preference

Go to preference menu.

Term Explanations:

Self-Cal: Oscilloscope will calibrate parameter of vertical system (CH1,

CH2, and Ext), horizontal system and trigger system.

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I/O Setup

Press Utility → I/O setting to go to the following menu.

Figure 2-82 Table 2-50 The I/O Setup menu

Display

Comments

RS-232

Baud

300

38400

Set RS-232 baud rate as 300, 2400,

4800, 9600, 19200 or 38400.

GPIB#

0 to 30

Set the GPIB address.

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Language

The DS1000CA series oscilloscopes have multi-language user menu, choose as your desire.

Press Utility→Language to select the language.

Figure 2-83 Language interface

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Pass/Fail

The Pass/Fail function monitors changes of signals and output pass or fail signals by comparing the input signal is within the pre-defined mask. The testing results not only can be displayed on screen or output by isolated pass/fail port but also can be alarmed if turn on system sound.

Press Utility→Pass/Fail to go to the following menu.

Figure 2-84 Table 2-51 The Pass/Fail menu (Page 1/2)

Setting

Comments

Enable Test

OFF

Turn on Pass/Fail test.

Turn off Pass/Fail test.

Source

CH1

CH2

Select Pass/Fail test on CH1.

Select Pass/Fail test on CH2.

Operate

(RUN)

■ (STOP)

Pass/Fail test stopped, press to run.

Pass/Fail test running, press to stop.

Msg display

OFF

Turn on Pass/Fail information display.

Turn off Pass/Fail information display.

Figure 2-85 Table 2-52 The Pass/Fail menu (Page 2/2)

Settings

Comments

Output

Fail

Fail +

[1]

Pass

Pass +

[1]

Output when Fail condition detected.

Output and beep when Fail condition

detected.

Output when Pass condition detected.

Output and beep when Pass condition

detected.

Stop

on Output

OFF

Stop test when output occur.

Continue test when output occur.

Mask

Go to mask setting menu.

Note: [1] Only available when sound is enabled.

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1. Mask Setting

Press Utility→Pass/Fail→Mask Setting to go to the following menu.

Figure 2-86 Table 2-53 The Mask setting menu (Page 1/2)

Settings

Comments

X Mask

<x div>

Set horizontal clearance to the

waveform (0.04div-4.00div).

Y Mask

<y div>

Set vertical clearance to the waveform

(0.04div-4.00div).

Create

Mask

Create a test mask according to the

above clearance.

Location

Internal

External

Set the memory location of the mask

files.

Figure 2-87 Table 2-54 The Mask setting menu (Page 2/2)

When the save as internal memory

Settings

Comments

Save

Store created test mask into internal

memory.

Load

Recall mask setting file from internal

memory.

Imp./Exp.

Go to import/export menu (same as

REF import/export menu.).

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Figure 2-88 Table 2-55 The Mask setting menu (Page 2/2)

When the save as external memory

Settings

Comments

Save

Go to save menu (same as REF save

menu).

Load

Go to load menu (see Table 2-56).

Import

Go to import menu. (The same as REF

import menu).

2. Mask Setting

Press Utility→Pass/Fail→Mask Setting→Load to go to the following menu.

Figure 2-89 Table 2-56 The Load menu

Settings

Comments

Explorer

Path

Directory

File

Switch among Path, Directory and

File.

Load

Recall the specified file.

NOTE: Pass/Fail function is unavailable in X-Y mode.

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3. Pass/Fail connection

The Pass/Fail connection has an optically isolated output. It needs to connect to another circuit to fulfill the function.

Before connecting to an external circuit, make sure the maximum voltage/current does not exceed the internal photo MOS relay‟s rating, 400V/100mA. DS1000CA series adopts the technique of Optical Isolation, and the output device has no polarity and can be used in any circuit within the ratings.

Figure 2-90

Schematic Diagram of Pass/Fail output

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Waveform Recorder

Waveform recorder records input waveforms from CH1 and CH2, with a maximum record length of 1000 frames. This performance can also be activated by the Pass/Fail test output, which makes this function especially useful to capture abnormal signals in long term without keeping an eye watching it. This function contains four modes: OFF, Record, Play back and Storage. More details about the function please refer to the following introduction.

1. OFF: It will close all record functions.

2. Record: To record waveform by selected time interval till the last frame.

Press Utility→Record→Mode→Record to go to the following menu

Figure 2-91 Table 2-57 The Record menu (Page 1/2)

Settings

Comments

Mode

OFF

Record

Play back

Storage

Turn off all recorder functions.

Select record mode.

Select play back mode.

Select storage mode.

Source

CH1

CH2

P/F-OUT

Select record source channel.

End Frame

<1-1000>

Set number of record frames.

Operate

(Run)

(Stop)

Record stopped, press to Start

recording.

Press to stop recording.

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Figure 2-92 Table 2-58 The Record menu (Page 2/2)

Settings

Comments

Interval

<1.00ms-1000s>

Set time interval between

record frames.

3. Play back: Play back the recorded waveforms.

Figure 2-93 Table 2-59 The Play Back menu (Page 1/2)

Settings

Comments

Operate

(Run)

(Stop)

Play stopped, press to Start

playback.

Press to stop playing.

Play mode

Set repeat play mode.

Set single time play mode.

Interval

<1.00ms-20s>

Set up interval.

Figure 2-94 Table 2-60 The Play Back menu (Page 2/2)

Settings

Comments

Start Frame

<1-1000>

Set start frame.

Current

Frame

<1-1000>

Select current frame to be played.

End Frame

<1-1000>

Set End frame.

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Key Points

The RUN/STOP button can also replay or continue the waveform display.

4. Storage: Store recorded waveforms to non-volatile memory according to the

setup frames.

Figure 2-95 Table 2-61 The Storage menu (Page 1/2)

Settings

Comments

Start Frame

<1-1000>

Set first frame to be saved.

End Frame

<1-1000>

Set last frame to be saved.

Location

Internal

external

Set up Store location.

Figure 2-96 Table 2-62 The Storage menu when the save to Internal memory

(Page 2/2)

Settings

Comments

Save

Save recorded waveform to internal

memory location.

Load

Recall recorded waveform from

internal memory location.

Imp./Exp.

Go to import/export menu (Same as

REF import/export menu).

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Figure 2-97 Table 2-63 The Storage menu when the save as external memory

(Page 2/2)

Settings

Comments

Save

Go to save menu (same as REF save

menu).

Load

Go to load menu (see Table 2-56).

Import

Go to import menu. (Same as REF

import menu).

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Print Set

DS1000CA series oscilloscopes support external printers.

Press Utility→ Print set to go to the following menu.

Figure 2-98 Table 2-64 The Print Set menu

Settings

Comments

Execute print function.

Inverted

OFF

Invert the color for print.

Print original color.

Palette

Gray scale

Color

Set up print color.

Rigol DS1000CA series, DS1302CA, DS1202CA, DS1102CA, DS1072CA User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual