Rigol DS1102CD, DS1000CD, DS1000MD, DS1000M, DS1102C User Manual

User’s Guide RIGOL

Publication number DS1-071026 October 2007

DS1000 Series Digital Oscilloscopes

DS1000CD, DS1000C, DS1000MD, DS1000M

RIGOL

User’s Guide for DS1000 Series

z Copyright © RIGOL TECHNOLOGIES, INC. 2006 All Rights Reserved. z RIGOL products are protected by patent law in and outside of P.R. China. z Information in this publication replaces that in all previously corresponding

material.

z RIGOL Technologies, Inc. reserves the right to modify or change pat of or all

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

NOTE:

RIGOL

is registered trademark of

RIGOL

TECHNOLOGIES, INC.

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II © Copyright RIGOL Technologies, Inc. 2007.

User’s Guide for DS1000 Series

Safety Notices

Review the following safety precautions carefully before operate the instrument to avoid any personal injury or to damage the instrument and any products connected to it.

To avoid potential hazards use the instrument in a manner only as specified by this user’s guide.

The instrument should be serviced by qualified personnel only.

To Avoid Fire or Personal Injury

Use proper power cord Use only the power cord designed for your oscilloscope

and authorized in your country.

Connect and Disconnect accessories properly. Do not connect or disconnect

probes or test leads while they are connected to a voltage source

Ground the instrument This oscilloscope is grounded through the protective

earthing conductor of the power cord. To avoid electric shock the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the oscilloscope ensure that the instrument is properly grounded.

Connect the probe properly. The probes’ ground terminals are at the same

voltage level with earth terminal of the instrument. 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 your oscilloscope with covers or

panels removed.

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User’s Guide for DS1000 Series

Use Proper Fuse. Use only the fuse type and rating specified for this product.

Avoid Circuit or Wire Exposure. Do not touch exposed connections and

components when power is on.

Do not operate with suspected failures. If you suspect damage with this

product, have it inspected by qualified service personnel before further operations.

Provide Proper Ventilation. Refer to the manual’s installation instructions for

details as to the oscilloscope has proper ventilation.

UL/cUL or cCSAus certified probes must be used with the oscilloscope.

Do not operate in wet/damp conditions

Do not operate in an explosive atmosphere Keep product surfaces clean and dry

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User’s Guide for DS1000 Series

Safety Terms and Symbols Terms in This Guide. These terms may appear in this guide:

WARNING: Warning statements identify conditions or practices that could result in injury or loss of life.

CAUTION: Caution statements identify 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 hazard may be immediately accessible.

WARNING indicates an injury hazard may be not immediately accessible.

CAUTION indicates that a potential damage to the instrument or other property

might occur.

Symbols on the Product: These symbols may appear on the Instrument:

!

Hazardous Voltage

Refer to Instructions

Protective earth terminal

Test Grounding Terminal

Grounding Terminal of Chassis

!

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User’s Guide for DS1000 Series

General-Purpose Oscilloscopes

RIGOL DS1000-Series Digital Oscilloscopes offer exceptional waveform viewing

and measurements in a compact, lightweight package. The DS1000 series are ideal for production test, field service, research and design and all of the applications involving analog/digital circuits test and troubleshooting, as well as education and training.

Each of these oscilloscopes gives you: z Dual Channel, Bandwidth:

100MHz (DS1102CD, DS1102C, DS1102MD, DS1102M) 60MHz (DS1062CD, DS1062C, DS1062MD, DS1062M) 40MHz (DS1042CD, DS1042C, DS1042MD, DS1042M) 25MHz (DS1022CD, DS1022C, DS1022MD, DS1022M)

z Optional 16 digital channels (Mixed signal oscilloscope), each channel can be

turned on or off independently, or in a 8 bit group

z Mono/Color TFT LCD Displays at 320*234 resolution z USB storage and printing supports, firmware upgradeable via USB connectivity z Adjustable waveform intensity, more effective waveform viewing z One-touch automatic setup for ease of use (AUTO) z Saves 10 Waveforms, 10 setups, supports CSV and bitmap format z Newly designed Delayed Scan Function, easy to give attention to both details

and overview of a waveform

z 20 Automatic measurements z Automatic cursor tracking measurements z Waveform recorder, record and replay dynamic waveforms z User selectable fast offset calibration z Built-in FFT function, Frequency Counter z Digital filters, includes LPF, HPF, BPF, BRF z Pass/Fail Function, optically isolated Pass/Fail output z Add, Subtract and Multiply Mathematic Functions z Advanced trigger types include: Edge, Video, Pulse width, Slope, Alternative,

Pattern and Duration (Mixed signal oscilloscope)

z Adjustable trigger sensitivity

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User’s Guide for DS1000 Series

z Multiple Language User Interface z Pop-up menu makes it easy to read and easy to use z Built-in Chinese and English help system z Easy-to-use file system supports Chinese & English characters key-in

DS1000 Series Digital Oscilloscope accessories:

z Two 1.5 meter, 1:1 10: 1 switchable probes z Digital test set (Mixed Signal Oscilloscope only, DS1xxxxD), include

A data line (Model: FC1868) An active logic head (Model: LH1116) Twenty test wire (Model: LC1150) Twenty logic clips (Model: TC1100)

z Power cord for country of destination z User’s Guide z Warranty Card z A Ultrascope for WIN98/2000/XP software

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User’s Guide for DS1000 Series

Content

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

General-Purpose Oscilloscopes ..........................................................................V

CHAPTER 1: GETTING STARTED ..................................................................... 1-1

The Front Panel and the User Interface ....................................................... 1-2

To Inspect the Instrument .......................................................................... 1-6

To Perform a Functional Check.................................................................... 1-7

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

To Use Digital Leads (Mixed Signal Oscilloscope) ........................................ 1-10

To Display a Signal Automatically .............................................................. 1-12

To Set Up the Vertical Window.................................................................. 1-13

To Set Up the Horizontal System ............................................................... 1-15

To Trigger the Oscilloscope....................................................................... 1-17

CHAPTER 2: OPERATING YOUR OSCILLOSCOPE .............................................. 2-1

Understand the vertical system ................................................................... 2-2

Understand the Horizontal System............................................................. 2-30

Understand the Trigger System................................................................. 2-36

To Set Up the Sampling System ................................................................ 2-59

To Set Up the Display System ................................................................... 2-63

To Store and Recall Waveforms or Setups.................................................. 2-65

To Set Up the Utility ................................................................................. 2-73

To Measure Automatically......................................................................... 2-91

To measure with cursors........................................................................... 2-98

To use run control buttons.......................................................................2-105

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

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User’s Guide for DS1000 Series

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

Example 10: Triggering on a Digital Signal…………………………………………….….3-14

CHAPTER 4: PROMPT MESSAGES & TROUBLESHOOTING .................................4-1

Prompting Message .................................................................................... 4-1

Troubleshooting..........................................................................................4-3

CHAPTER 5: SUPPORT & SERVICE ..................................................................5-1

CHAPTER 6: APPENDIX ..................................................................................6-1

Appendix A: Specifications ..........................................................................6-1

Apendix B: DS1000-Series Accessories .........................................................6-7

Appendix C: General Care and Cleaning .......................................................6-8

Index.............................................................................................................6-i

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User’s Guide for DS1000 Series

Chapter 1 : Getting Started

This chapter covers the following topics:

 The front panel and user interface

 To inspect the instrument

 To perform a functional check

 To compensate probes

 To use digital leads (Mixed signal oscilloscope only)

 To display a signal automatically

 To set up the vertical system

 To set up the horizontal system

 To trigger the oscilloscope

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1-2 © Copyright RIGOL Technologies, Inc. 2007.

User’s Guide for DS1000 Series

The Front Panel and the User’s Interface

One of the first things you will want to do with your new oscilloscope is to become acquainted with its front panel. This chapter will help you 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 has knobs and buttons. The knobs are used most often and are similar to the knobs on other oscilloscopes. The buttons not only let you use some of the functions directly but also bring up soft button menus on the screen, which allow you access to many measurement features associated with advanced functionalities, math, and reference or run control features.

Figure 1-1

Front Panel of DS1000-Series Oscilloscope

DS1000 series oscilloscopes provide an easy-to-use user interface, the definitions of the buttons and the knobs are as follows:

Menu buttons: Associated with Measure, Cursor, Acquire, Display, Storage, and

Utility menus.

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User’s Guide for DS1000 Series

Vertical buttons: Associated with CH1, CH2, MATH, REF and LA menus, the OFF

button can set waveform or menu which currently active off.

Horizontal buttons: Associated with horizontal MENU. Trigger buttons: Associated with trigger MENU, instant action to set 50% trigger

level and FORCE trigger.

Action buttons: Include run control buttons for AUTO and RUN/STOP.

Function buttons: Five grey buttons from top to bottom on the right to the LCD

screen, which set choices of operation in the currently active menu.

Knobs: For the adjustment of vertical or horizontal

,

and trigger .

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User’s Guide for DS1000 Series

Figure 1-2

Front Panel Controls

Character definitions in this User’s Guide:

Throughout this book, character figures of buttons and knobs are the same to 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 WAVEFORM soft key in STORAGE menu.

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User’s Guide for DS1000 Series

Figure1-3

Display screen (Analog channels only)

Figure 1-4

User Interface (Analog and Digital channels)

Waveform display window

Menu

Channel 1

Channel 2

Running status

Location of waveform window in memory

Trigger point in waveform windo

w

Digital channels turned on

Digital channel turned off

Running status

Channel 1

Digital channels

Channel coupling and vertical div.

Horizontal time base div.

Trigger offset

Trigger point in memory

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User’s Guide for DS1000 Series

To Inspect the Instrument

After you get a new DS1000 series oscilloscope, please inspect the instrument according to the following steps:

1. Inspect the shipping container for damage.

Keep a damaged shipping container or cushioning material until the contents of the shipment have been checked for completeness and the instrument has been checked mechanically and electrically.

2. Check the accessories.

Accessories supplied with the instrument are listed in "Accessories" in this guide.

If the contents are incomplete or damaged notify your RIGOL Sales Representative.

3. Inspect the instrument.

In case any mechanical damage or defect, or if the instrument does not operate properly or pass performance tests, notify your RIGOL Sales Representative.

If the shipping container is damaged, or the cushioning materials show signs of stress, notify the carrier as well as your RIGOL sales office. Keep the shipping materials for the carrier’s inspection. RIGOL offices will arrange for repair or replacement at option of RIGOL without waiting for claim settlement.

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User’s Guide for DS1000 Series

To Perform a Functional Check

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

1. Turn on the instrument.

Use only power cords designed for your oscilloscope. Use a power source that delivers 100 to 240 VAC

RMS

, 45Hz to 440Hz. Turn on the instruments, and wait until

the display shows the waveform window. Push the Storage

button, select Storage in

the top menu box and push the Factory menu box.

Figure 1-5

WARNNING:

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

2．Input a signal to a channel of the oscilloscope

① Set the switch on the probe to 10X and connect the probe to channel 1 on the

oscilloscope. To do this, align the slot in the probe connector with the key on the CH 1 BNC, push to connect, and twist to the right to lock the probe in place. Attach the probe tip and ground lead to the PROBE COMP connector.

Power button

Storage button

!

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User’s Guide for DS1000 Series

Figure 1-6

② Set the probe attenuation to 10X. To do this, push CH1→Probe→10X.

Figure 1-7 Figure 1-8

③ Push the AUTO button. Within a few seconds, you could see a square wave in the

display (approximately 1 kHz 3 V peak- to- peak).

④ 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 2 and 3.

Probe compensator

Probe scale

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User’s Guide for DS1000 Series

To Compensate Probes

Perform this adjustment to match your probe to the input channel. This should be done whenever you attach a probe for the first time to any input channel.

1. Set the Probe menu attenuation to 10X. Set the switch to 10X on the probe and connect the probe to channel 1 on the oscilloscope. If you use the probe hook-tip, ensure a proper connection by firmly inserting the tip onto the probe. Attach the probe tip to the PROBE COMP connector and the reference lead to the PROBE COMP Ground connector, turn on channel 1, and then press AUTO.

2. Check the shape of the displayed waveform.

Over compensated Correctly Compensated Under Compensated

Figure 1-9

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

for the flattest square wave possible as displayed on the oscilloscope.

4. Repeat as 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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User’s Guide for DS1000 Series

To Use Digital Leads (Mixed Signal Oscilloscope)

1. Switch off power supply of the Device Under Test if necessary to avoid short circuit. Since no voltage is applied to the leads at this step, you may keep the oscilloscope on.

2. Connect one end of the flat cable FC1868 to the Logic Analyzer Input, connect the other end to Logic Head LH1116. An identifier is located on each end of the flat cable, it can only be connected in one way. It is unnecessary to switch off power supply of your oscilloscope connect the cable.

Figure 1-10

CAUTION: Use only FC1868, LH1116, TC1100 and LC1150 made by

RIGOL for specified mixed signal oscilloscopes.

!

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User’s Guide for DS1000 Series

3. Connect a test clip to one lead wire; make sure it’s connected well.

Figure 1-11

4. Test your device with the clip.

Figure 1-12

5. Remember to connect Ground Channel to the DUT’s ground terminal.

Figure 1-13

Test clip

GND

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User’s Guide for DS1000 Series

To Display a Signal Automatically

The oscilloscope has an Auto feature that sets up the oscilloscope automatically to display the input signal in a best fit. This Auto feature requires the input signal with a frequency of 50 Hz or higher and a duty cycle greater than 1%.

When you press the AUTO button, the oscilloscope automatically sets up vertical, horizontal and Trigger controls to display the input signal in the screen for view. You may want to adjust the controls manually if necessary to get the best results.

DS1000 series are two-channel oscilloscopes with an external trigger input. In this exercise you connect a signal to the channel 1 input.

1. Connect a signal to the oscilloscope.

2. Press AUTO.

When you press the AUTO button, the oscilloscope may change the current settings to display the signal. It automatically adjusts the vertical and horizontal scaling, as well as the trigger coupling, type, position, slope, level, and mode settings.

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User’s Guide for DS1000 Series

To Set Up the Vertical Window

Figure 1-14 shows the Channels, MATH, REF, Logic Analyzer and OFF buttons and vertical

, knobs. The following exercise guides you through the vertical buttons, knobs, and status bar. It will help you be familiar with the setting of the vertical parameters.

Figure 1-14

1. Center the signal on the display with the

knob.

The

knob moves the signal vertically, and it is calibrated. Notice that

as you turn the

knob, a voltage value is displayed for a short time indicating how far the ground reference is located from the center of the screen. Also notice that the ground symbol on the left side of the display moves in conjunction with the

knob.

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User’s Guide for DS1000 Series

Measurement hints

If the channel is DC coupled, you can quickly measure 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, allowing you to use greater sensitivity to display the AC component of the signal.

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.

2. Change the vertical setup and notice that each change affects the status bar differently.

You can quickly determine the vertical setup from the status bar in the display. z Change the vertical sensitivity with the

knob and notice that it

causes the status bar to change.

z Press CH1. z A soft button menu appears on the display, and the channel turns on (or remains

on if it was already turned on).

z Toggle each of the soft buttons and notice which button cause the status bar to

change. Channel 1 and 2 have a vernier soft button that allows the knob to change the vertical step size in smaller increments. To press Volts/Div

soft button, you can change the step size into Fine or Coarse status.

z Press OFF button to turn the channel off.

Coarse/Fine Shortcut key

You can set the Coarse/Fine vertical control not only on the Volts/Div item in the CH1 or CH2 menus, but also by simply pressing the vertical knob.

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User’s Guide for DS1000 Series

To Set Up the Horizontal System

Figure 1-15 shows the MENU button, and knobs of horizontal system. The following exercise guides you through these buttons, knobs, and status bar.

Figure 1-15

1. Turn the

knob and notice the change it makes to the status

bar.

The horizontal

knob changes the sweep speed in a 1-2-5 step sequence, and the value is displayed in the status bar. The time base ranges of the DS1000 series are listed as follows. The horizontal scan speed is from 5ns/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 and it is equal to the

following menu operations, MENU→Delayed.

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User’s Guide for DS1000 Series

2. The horizontal

knob moves displayed signal horizontally

on waveform window

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.

3. Press the MENU key to display the TIME menu.

In this menu, you can enter or exit the Delayed Scan mode, set the display to Y-T, X-Y or ROLL mode, and turn the horizontal

knob to adjust trigger offset.

Horizontal position control

Trig-Offset: In this setting, the trigger position will be changed horizontally

when you turn the

knob.

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User’s Guide for DS1000 Series

To Trigger the Oscilloscope

Figure 1-16 shows the trigger control area on the front panel, it has a trigger level knob and three soft buttons. The following exercise guides you through these trigger buttons, knobs, and status bar.

Figure 1-16

1. Turn the trigger Level knob and notice the changes it makes to the display.

On the DS1000 series oscilloscopes, as you turn the

knob or press the 50% menu button, two things happen on the display for a short time. First, the trigger level value is displayed at the bottom-left of the screen. If the trigger is DC coupled, it is displayed as a voltage value. If the trigger is AC coupled or LF reject, it is displayed as a percentage of the trigger range. Second, a line is displayed showing the location of the trigger level (as long as AC coupling or low frequency reject are not selected).

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User’s Guide for DS1000 Series

2. Change the trigger setup and notice these changes affect the status bar differently.

· Press MENU button in the trigger control area. A soft button menu appears on the display showing the trigger setting choices. Figure 1-17 displays this trigger menu.

· Press the trigger Mode button and choose Edge.

· Press the trigger Source button to select CH1.

· Press the trigger Slope button to choose Rising Edge.

· Press the trigger Sweep button to select Auto.

· Press the trigger Set Up button to enter secondary menu.

Figure 1-17

NOTE: The trigger type, slope and source change in conjunction with the status bar

on the top-right of the screen.

3. Press 50%

This key is an action button. Every time you press the 50% button, the oscilloscope sets the trigger level to the center of the signal.

Trigger Level to 0 Shortcut key

Turn the

knob to change trigger level value and press the

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

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User’s Guide for DS1000 Series

4. Press FORCE

Press this button 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.

Key point:

Holdoff: A time interval before the oscilloscope response to next trigger

signal. During this holdoff period, the trigger system becomes “blind” to

trigger signals. This function helps to view complex signals such as an AM

waveform. Press Holdoff button to activate (

) knob, then turn it to adjust

Holdoff time.

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User’s Guide for DS1000 Series

Chapter 2 : Operating Your Oscilloscope

By now you have got a brief understanding of DS1000 series with the VERTICAL, HORIZONTAL, and TRIGGER groups of the front-panel buttons. You should also know how to determine the setup of the oscilloscope by viewing the status bar. This chapter takes you through all groups of front-panel buttons, knobs, and menus. You will also further your knowledge of the operation hints by reading this guide. We recommend you perform all of the following exercises so that you could get the most out of the powerful measurement capabilities of your oscilloscope.

This chapter covers the following topics:

 Understand the vertical system ( CH1, CH2, MATH, REF, LA (Mixed

Signal Oscilloscope), OFF,

Vertical , Vertical )

 Understand the horizontal system ( MENU, Horizontal

,

Horizontal )

 Understand the trigger system (

, MENU, 50%, FORCE)

 To set up the sampling system ( Acquire)

 To set up the display system ( Display)

 To save and recall waveforms, CSV format, bmp format and other setups

( Storage)

 To set up utility ( Utility)

 To measure automatically ( Measure)

 To measure with cursors ( Cursor)

 To use run control buttons ( AUTO, RUN/STOP)

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User’s Guide for DS1000 Series

Understand the vertical system

Ⅰ. Settings of the channels

Each channel of DS1000 has an operation menu and it will pop up after pressing CH1 or CH2 button. The settings of all items in the menu are shown in the table below.

Figure 2-1 Table2-1

Menu Settings Comments

Coupling

AC

DC

GND

Blocks the DC component of the input Signal Passes both AC and DC components of the input signal Disconnects the input signal

BW Limit

ON

OFF

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

Probe

1X 10X 100X 1000X

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

Digital filter

Setup digital filter (See table 2-4)

1/2

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

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User’s Guide for DS1000 Series

Figure 2-2 Table2-2

Menu Settings Comments

2/2

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

Volts/Div

Coarse

Fine

Selects the resolution of the

knob Defines 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.

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User’s Guide for DS1000 Series

1. Channel coupling

To use CH1 as an example, input a sine wave signal with DC shift

Press CH1→Coupling→AC to set coupling as “AC” of CH1. In this setting, it blocks

the DC component of the input signal.

The waveform is displayed as Figure 2-3:

Figure 2-3

Press CH1→Coupling→DC, to set coupling as “DC” of CH1. In this setting, it passes

both AC and DC components of the input signal.

AC coupling setup

AC coupling status symbol

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User’s Guide for DS1000 Series

The waveform is displayed as Figure 2-4:

Figure 2-4

Press CH1→Coupling→GND, to set coupling as “GND” of CH1. In this setting, it

disconnects the input signal.

The screen displays as Figure 2-5:

Figure 2-5

GND coupling setup

GND coupling status symbol

DC coupling setup

DC coupling status symbol

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User’s Guide for DS1000 Series

2. Set up the channel bandwidth limit

To use CH1 as an example, input a signal that contains high frequency component.

Press CH1→BW Limit→OFF, to set up bandwidth limit to “OFF” status. The

oscilloscope is set to full bandwidth and the high frequency component in the signal will pass.

The waveform is displayed as Figure 2-6:

Press CH1→BW Limit→ON, to set up bandwidth limit to “ON” status. It will reject

the frequency component higher than 20MHz.

The waveform is displayed as Figure 2-7:

Turn off the BW limit

Figure 2-6

Figure 2-7

20M BW limit

Mark of BW limit

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User’s Guide for DS1000 Series

3. Probe Attenuation Setting

When using a probe, the oscilloscope allows you to select 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 you are using), toggle the Probe soft button to change

the attenuation factor to match the probe you are using. This setting remains in effect until changed again.

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

Figure 2-8

Tab l e 2-3

Probe attenuation factors

Corresponding settings

1:1 1X

10:1 10X

100:1 100X

1000:1 1000X

Probe attenuation

Vertical volt/div.

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User’s Guide for DS1000 Series

4. Volts/Div settings

The Volts/Div control has Coarse or Fine configuration. The Vertical Sensitivity is

2mv-5V/div.

Coarse: It is the default setting of Volts/Div, and it makes the vertical scaling in a

1-2-5-step sequence from 2mV/div, 5mV/div, 10mV, to 5 V/div.

Fine: This setting changes the vertical scale to small steps between the coarse

settings. It will be helpful when you need to adjust the waveform’s vertical size in smooth steps

Figure 2-9

Coarse/Fine Shortcut key:

To change Coarse/Fine setting, not only by menu but also by pressin

g

vertical

knob

Fine adjustment

Fine adjustment data

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User’s Guide for DS1000 Series

5. 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 2-10 and 2-11 show the changes after inversion.

The waveform before inversion

Figure 2-10

The waveform after inversion

Figure 2-11

Invert ON

Invert OFF

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User’s Guide for DS1000 Series

Digital Filter:

Press CH1→Digital filter, display the digital filter menu. Turn ( ) knob to set high and low limit of frequency.

Turn off digital filter

Turn on digital filter

Mark of digital filter

Figure 2-12

Figure 2-13

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User’s Guide for DS1000 Series

Figure 2-14 Table 2-4

Menu Settings Comments

Digital Filter

On Off

Turn on the digital filter Turn off 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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User’s Guide for DS1000 Series

Ⅱ. Math functions

The mathematic functions include “add”, “subtract”, “multiply” and “FFT” for CH1 and CH2. The mathematic result can also be measured by grid and cursor.

Figure 2-15

Figure 2-16 Table 2-5

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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User’s Guide for DS1000 Series

I. Using the FFT

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

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

Figure 2-17 Table2-6

Menu

Settings Comments

Operate

A+B A- B AxB 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

Vrms dBVrms

Set “Vrms ” as vertical unit Set “dBVrms ” as vertical unit

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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 dBVrms

scale. The dBVrms scale displays component magnitudes using a log

scale.

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User’s Guide for DS1000 Series

Selecting an FFT Window

DS1000 series oscilloscopes provide four FFT windows. Each window is a trade-off between frequency resolution and amplitude accuracy. What you want to measure and your source signals characteristics help determine which window to use. Use the following guidelines to select the best window.

Tab l e2 -7

Window

Features

Best for measuring

Rectangle

Best frequency Resolution and 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 Hamming

Better frequency, poorer magnitude accuracy than Rectangular. Hamming has slightly better frequency resolution than Hanning.

Sine, periodic, and narrow-band random noise. 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.

Key points: 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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User’s Guide for DS1000 Series

II. Using REF

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 reference waveform menu.

Figure 2-18 Table2-8 when using internal memory

Menu Settings Comments

Source

CH1

CH2

MATH/FFT

LA

Select channel1 as REF channel

Select channel2 as REF channel

Select Math/FFT as REF channel

Select LA as REF channel( Mixed Signal Oscilloscope)

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 2-10)

Reset Reset REF waveform

Figure 2-19 Table 2-9 when using external memory

Menu Settings Comments

Source

CH1

CH2

MATH/FFT

LA

Select channel1 as REF channel

Select channel2 as REF channel

Select Math/FFT as REF channel

Select LA as REF channel( Mixed Signal Oscilloscope)

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 2-14)

Reset Reset REF waveform

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User’s Guide for DS1000 Series

Import and Export

Press REF→Imp./Exp. and go to the following menu.

Figure 2-20 Table 2-10

Menu

Settings Comments

Explorer

Path Directory File

Switch to Path, directory or file

Export

Export the REF file from internal memory to export memory (see table 2-11)

Import

Import the REF file to internal memory

Delete File

Delete file

The figure of import and export as following

Figure 2-21

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Export

Press REF→Imp./Exp.→Export and go to the following menu.

Figure 2-22 Table 2-11

Menu Settings Comments

Move the cursor up

Move the cursor down

To delete chosen letter

Save Execute the operation

The figure of export as following.

Figure 2-23

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User’s Guide for DS1000 Series

Save to External Memory

Press REF→Save and go to the following menu.

Figure 2-24 Table 2-12

Menu Settings Comments

Explorer

Path Directory File

Switch among Path, Directory and File

New File (Folder)

Set up new file in Path and File. Set up new folder in directory.

Delete File(Folder)

Delete file(Folder)

The figure of Save as following:

Figure 2-25

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User’s Guide for DS1000 Series

New File (or New Folder)

Press REF→Save→New File (or New Folder) and go to the following menu.

Figure 2-26 Table 2-13

Menu Settings Comments

Move the cursor up

Move the cursor down

To delete chosen letter

Save Execute the operation

The figure of key in as following

Character window

Switch Capital on/off

Switch Chinese/English

Spell key in

File name key in

Figure 2-27

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User’s Guide for DS1000 Series

Import

Press REF→Import and go to the following menu.

Figure 2-28 Table 2-14

Menu Settings Comments

Explorer

Path Directory File

Switch among Path, Directory and File

Import

Import the REF file into internal memory

The figure of import as following.

Figure 2-29

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User’s Guide for DS1000 Series

Displaying a Reference Waveform.

Figure 2-30

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

2. Press soft button 1 to select CH1, CH2, MATH, FFT or LA (Mixed Signal Oscilloscope) to choose the REF channel you want.

3. Turn vertical and vertical to adjust the REF waveform to a suitable position.

4. Select the save location of REF waveform by press soft button No. 2.

5. Save the waveform being displayed on the screen as REF by press soft button No.3.

NOTE:

The reference function is not available in X-Y mode.

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User’s Guide for DS1000 Series

III. Set up LA channel (mixed signal oscilloscope)

Single channel or group channels can be chosen ON or OFF, and also can set the size of waveform. Change display location of digital channel on screen and select threshold style.

Press LA function button and go to the following menu.

Figure 2-31 Table 2-15

Menu Settings Comments

D7-D0

Set up channel group D7-D0 (see table 2-16)

D15-D8 set up channel group D15-D8 (see 2-17)

Current

<D15-D0>

Select channel by turning (

) knob

Threshold

TTL

CMOS

ECL

User

Select mode of whole digital channels. The threshold voltage can set by user when in user-defined style.

User

<Threshold

Voltage>

Set threshold voltage by turning (

)

knob.

1. Display and re-line up the digital channels (1) Press LA→D7-D0 or D15-D8 and go to the group channel setting menu. Turn on

or turn off the display of the digital channels.

(2) Press LA→current and choose digital channel by turning (

) knob. The

chosen channel will be shown in red (Color LCD).

(3) Turn vertical

knob to re-position the channel in screen.

The figure of menu shows as follow.

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User’s Guide for DS1000 Series

Figure 2-32

2. Set threshold mode of digital channels

Press LA→Threshold, select logic standard or User to define your own threshold

voltage.

The figure of menu shows as follow.

Figure 2-33

Select running channel

Running channel

Setup threshold

Setup data of threshold by user

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User’s Guide for DS1000 Series

Threshold explanation

LOGIC STANDARD THRESHOULD VLOTAGE

TTL 1.4V

CMOS 2.5V

ECL -1.3V

User -8V to +8V

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Set up Cannel Group

Press LA→D7-D0 or D15-D8; turn on/off the channel single, or in a group. Also you can change the size of waveforms in 8 bits as a group. See table 2-16 and 2-17

Figure 2-34 Table 2-16

Menu Settings Comments

channel D7-D0 Turn on or off single channel of D7-D0

D7-D0

Turn on Turn off

Turn on or off all 8 channels together

Size

Display 8 channels in a single screen Display 16 channels in a single screen

Reset Reset waveform of channel D7-D0

Figure 2-35 Table 2-17

Menu Settings Comments

channel D15-D8 Turn on or off single channel of D15-D8

D15-D8

Turn on Turn off

Turn on or off 8 channels together

Size

Display 8 channels in a single screen Display 16 channels in a single screen

Reset Reset waveform of channel D15-D8

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User’s Guide for DS1000 Series

1. Turn on or off a single logic channel

Press LA→D7-D0→Channel, and choose the wanted channel by turning ( ) knob. Press No. 1 soft button or push down ( ) knob to turn on /off the channel. When the channel is on, we can see the mark (

). When the channel is turned off, the mark

will be shown as (

).

As figure 2-36 shows.

Figure 2-36

2. Force turn on or off all logic channels

Press LA→D7-D0→D7-D0→Turn On / Turn Off ( o r D 1 5 - D 8 →D15-D8→Tu r n O n /

Turn Off) will force to turn all the channels on/off. If you want to turn on/off any

single channel instead, select the Channel by turning (

) knob, then press No. 1

soft button or (

) knob.

3．Set up the viewing size of logic channels: Press LA→D7-D0→Size, or D15-D8→Size, to select wave size of logic channels. Select to view 8 channels on the screen；Select to view all of the 16

channels on the screen.

4．Reset the logic channels display:

Press LA→D7-D0→Reset, or D15-D8→Reset to reset the display of logic channels.

On-off channels

Channel list and status of on-off

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User’s Guide for DS1000 Series

IV. Turn on/off channels

The CH1, CH2, Ext. Trigger and LA (Mixed Signal Oscilloscope) channels on DS1000 series are input channels. All functionalities applied will be based on operating the instrument with channels. So MATH and REF can be regarded as relatively isolated channels.

To turn on/off any one of the channels, press the corresponding button on the front panel. The key backlight indicates the channel is currently active. Press the button again to turn the channel off. Or when channel is currently selected, press OFF will turn the channel off as well, and the key backlight also goes off.

Table 2-18

Status Indicator

Channel Mode Settings

DS1000 MONO DS1000 COLOR

Channel 1 (CH1)

ON Selected OFF

CH1 (black letter)

CH1 (white letter)

No indicator

CH1 (black letter)

CH1 (yellow letter)

No indicator

Channel 2 (CH2)

ON Selected OFF

CH 2 (black letter)

CH2 (white letter)

No indicator

CH2 (black letter)

CH2 ( blue letter)

No indicator

MATH

ON Selected OFF

Math (black letter)

Math (white letter)

No indicator

Math (black letter)

Math (purple letter)

No indicator

Note:

The status indicators of the DS1000 Mono series in the above table are displayed when the Screen is set as Normal. The channel status symbol is displayed at the lower-left of the screen. Pressing LA will turn all the digital channels on/off

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User’s Guide for DS1000 Series

V. Using Vertical and

You can use the vertical controls to display waveforms, adjust vertical

and

, and set input parameters.

1. Using vertical

knob.

The vertical

can change the position of waveforms in all channels (including MATH, REF and LA). The resolution of the knob changes according to the change of the vertical level (The digital channels of Mixed Signal Oscilloscope changes according to the changes of the waveforms displayed). Pressing this knob will clear the channel offset to zero. (Exclude digital channels in the Mixed Signal Oscilloscope)

2. Using vertical

knob.

The vertical

can change the vertical sensitivity of waveforms in all channels (including MATH and REF, excluding LA). If the Volts/Div is set to “Coarse”, the waveform scales in a 1-2-5 step sequence from 2 mV to 5 V. If the Volts/Div is set to “Fine”, it scales to small steps between the coarse settings.

3. Channels can be adjusted by the vertical

and only when

they are selected.

4. When you change the vertical position, the position message is displayed on the left bottom of the screen, in the same color as the corresponding channel. The unit is V (Volts).

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User’s Guide for DS1000 Series

Understand the Horizontal System

The oscilloscope shows the time per division in the scale readout. Since all active waveforms use the same time base, the oscilloscope only displays one value for all the active channels, except when you use Delayed Scan, or Alternative Trigger.

The horizontal controls can 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 about the screen center.

Horizontal position changes the displayed waveform position, relative to the trigger point.

The Horizontal Knobs

: The horizontal knob adjusts 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.

: Use 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.

Horizontal Menu.

Press the horizontal MENU button to display the horizontal menu. The settings of this menu are listed in the following table.

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User’s Guide for DS1000 Series

Figure 2-37 Table 2-19

① ② ③

④⑤

Figure 2-38: Status bar and mark for Horizontal control

Menu Settings Comments

Delayed

ON OFF

Turn on Delayed Scan mode Turn off the Delayed Scan mode

Time Base

Y-T

X-Y

Roll

Show the relative relation between vertical voltage and horizontal time. Show CH1 value at X axis; CH2 value at Y axis. In Roll Mode, the waveform display updates from right to left.

Trig-offset Reset Adjust to the center

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Marks Indicator

①The mark represents the current waveform window’s position in the memory.

②This mark displays the trigger position in the memory.

③This mark displays the trigger position in the current waveform windows.

④ Status bar displays the horizontal time base (main time base).

⑤ Status bar displays the trigger’s horizontal offset according to the center of the

window.

Key Points Y-T:

T

he conventional oscilloscope display format. It shows the voltage of a waveform record (on the vertical axis) as it varies over time (on the horizontal axis).

X-Y: XY format displays channel 1 in the horizontal axis and channel 2 in the

vertical axis.

Roll Mode: In this mode, the waveform display rolls from right to left. No trigger

or horizontal offset control of waveforms is available during Roll Mode, and it’s only available when set to 500 ms/div or slower.

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 be set as DC.

Time/Div: Horizontal scale. If the waveform acquisition is stopped (using the

RUN/STOP button), the Time/Div control expands or compresses the waveform.

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User’s Guide for DS1000 Series

Delayed Scan:

The Delayed Scan is a magnified portion of the main waveform window. You can use Delayed Scan to locate and horizontally expand part of the main waveform window

for a more detailed (higher horizontal resolution) analysis of signal. Use Delayed

Scan to expand a segment of a waveform to see more details. The Delayed Scan time base setting cannot be set slower than the Main time base setting.

Figure 2-39: Delayed Scan window

The following steps show you how to use Delayed Scan.

1. Connect a signal to the oscilloscope and obtain a stable display.

2. Press horizontal MENU→Delayed→ON or press horizontal knob to

enter Delayed Scan mode.

The screen is divided into two parts. 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 shadow the upper half; the un-shadowed portion is expanded in the lower half. The horizontal

and knobs control the size

Waveform to be horizontally expanded

Expanded waveform in horizontal

Main timebase

Time base of Delayed Scan

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User’s Guide for DS1000 Series

and position of the Delayed Scan. The symbol at bottom of the screen means the main time base and the symbol on the center bottom means the Delayed Scan time.

z Use the horizontal

knob to change the position of the expanded

portion.

z Turn the horizontal

knob to adjust the Delayed Scan resolution.

z To change the main time base, you must turn off the Delayed Scan mode.

z Since both the main and Delayed Scan are displayed; there are half as many

vertical divisions so the vertical scaling is doubled. Notice the changes in the status bar.

Delayed Scan Shortcut Key:

Delayed Scan function can be activated not only by menu but also by pressing horizontal

knob.

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User’s Guide for DS1000 Series

X-Y Format

This format is useful for studying phase relationships between two signals.

Channel 1 in the horizontal axis(X) and channel 2 in the vertical axis(Y), the oscilloscope uses a none-trigger acquisition mode, data is displayed as dots. .

Figure 2-40: X-Y display format

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

z LA Function (Mixed Signal Oscilloscope)

z Automatic Measurements

z Cursor Measurements

z REF and MATH Operations

z Delayed Scan Mode

z Vector Display Mode

z Horizontal

knob

z Trigger Controls

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User’s Guide for DS1000 Series

Understand 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.

The trigger control area on the front panel includes a knob and three buttons:

: The knob that set the trigger level; press the knob and the level will be

cleaned to zero.

50%: The instant execute button setting the trigger level to the vertical

midpoint between the peaks of the trigger signal

FORCE: Force to create a trigger signal and the function is mainly used in

Normal and Single mode

MENU: The button that activates the trigger controls menu.

Figure 2-41: Trigger controls

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User’s Guide for DS1000 Series

Trigger Modes

The oscilloscope provides seven trigger modes: Edge, Pulse, Slope, Video, Alternative, Pattern (only for mixed signal oscilloscopes) and Duration trigger (only for mixed signal oscilloscopes).

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 Pattern: To Trigger through detecting a specified code. Duration: To trigger within a specified time on the conditions of a specified code

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Settings for 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.

Figure 2-42 Table 2-20

Menu

Settings Comments

Source

CH1 CH2 EXT EXT/5

AC Line D15-D0

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 Select a digital channel in D15-D0 as trigger source (Only in mixed signal oscilloscopes)

Slope

Rising Falling

Rising &

Falling

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 tri

gg

er occurred. When trigger occurs, acquire one waveform then stop

Set up To go to Set Up menu, see table 2-38

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User’s Guide for DS1000 Series

Settings for 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.

Figure 2-43 Table 2-21

Menu Settings Comments

Source

CH1 CH2 EXT

EXT/5

D15-D0

Selects CH1 as trigger signal Select CH2 as trigger signal Select EXT TRIG as tri

gg

er signal Select attenuated EXT TRIG/5 as trigger signal Select a digital channel in D15-D0 as trigger source( Only in mixed signal oscilloscopes)

When

(+Pulse width

less than)

(+Pulse width

more than)

(+Pulse width

equal to)

(-Pulse width

less than)

(-Pulse width

more than)

(-Pulse width

equal to)

To select pulse condition

Settings

<Width>

Set required pulse width

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Figure 2-44 Table 2-22

Menu 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 2-38

Note: The Pulse width adjust range is 20ns ～ 10s. When the condition is met, it

will trigger and acquire the waveform.

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User’s Guide for DS1000 Series

Settings for Video Trigger

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

Figure 2-45 Table 2-23 (Page One)

Menu 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

Triggers on negative going sync pulses

Triggers on positive going sync pulses

All Lines Line Num

Trigger on all lines Trigger on an specified line

Sync

Odd field Even field

Select to trigger on odd field Select to trigger on even field

Figure 2-46 Table 2-24 (Page Two, when Sync is set as the specified line)

Menu Settings Comments

Line Num

< Line sync >

Select the specified line number for

sync

Standard

PAL/SECM NTSC

Select Video standard

Set Up To go to set up menu, see table 2-39

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Figure 2-47 Table 2-25 (when the Sync is set as All lines, Odd field and Even field)

Menu Settings Comments

Standard

PAL/SECAM NTSC

Select Video standard

Set Up To go to set up menu, see table 2-39

Key points Sync Pulses: When Normal Polarity is selected, the trigger always occurs on

negative-going sync pulses. If the video signal has positive-going

sync pulses, use the inverted Polarity selection.

Figure 2-48: Line Synchronization

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User’s Guide for DS1000 Series

Figure 2-49: Video Trigger: Field Synchronization

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User’s Guide for DS1000 Series

SLOPE TRIGGER

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

Figure 2-50 Table 2-26 ( Page One)

Menu 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

Time

Set slope time

Figure 2-51 Table 2-27 ( Page Two)

Menu Settings Comments

Vertical

Select the level that can be adjusted by

Sweep

Auto

Normal

Single

Acquire waveform even when no trigger condition is met. Acquire waveform when trigger condition is met. When trigger condition is met, acquire one waveform and then stop

Set Up To go to set up menu. See table 2-38

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User’s Guide for DS1000 Series

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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User’s Guide for DS1000 Series

Alternative Trigger

When alternative trigger is on, the trigger sources are 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.

Figure 2-52 Table 2-28 (Trigger Type: Edge)

Menu 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

(Rising) (Falling)

(Rising & Falling)

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

Set Up

To go to set up menu. See table

2-38

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User’s Guide for DS1000 Series

Figure 2-53 Table 2-29 (Trigger Type: Pulse Page One )

Menu 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

(+Pulse width

less than)

(+Pulse width

more than)

(+Pulse width

equal to)

(-Pulse width

less than)

(-Pulse width

more than)

(-Pulse width

equal to)

To select pulse condition

Figure 2-54 Table 2-30 (Trigger Type: Pulse Page Two)

Menu Settings Comments

Setting

<

pulse width>

Set the width of the pulse

Set Up

To go to set up menu. See

table 2-38

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User’s Guide for DS1000 Series

Figure 2-55 Table 2-31 (Trigger Type: Slope Page One)

Menu 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 trigger condition

Figure 2-56 Table 2-32 (Trigger Type: Slope Page Two)

Menu Settings Comments

Time

<

Time Set >

Set slope time

Vertical

Select the level to be adjusted by

Set Up

To go to set up menu. See table

2-38

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User’s Guide for DS1000 Series

Figure 2-57 Table 2-33 (Trigger Type: Video Page One)

Menu Settings Comments

Select

CH1

CH2

Set trigger mode for Channel 1 Set trigger mode for Channel 2

Type Video Video Trigger for the channel

Polarity

Normal polarity

Inverted polarity

Triggers on negative going sync pulses Triggers on positive going sync pulses

Figure 2-58 Table 2-34 (Trigger Mode: Video Page two)

Menu Settings Comments

ALL lines Line Num

Trigger on all lines Trigger on an specified line

Sync

Odd field Even field

Select to trigger on odd field or even field

Line Num

<

Lines Set >

Select the specified line number for sync

Standard

PAL/SECM NTSC

Select Video standard

Set Up

To go to set up menu, see table 2-39

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User’s Guide for DS1000 Series

Pattern Trigger (Mixed Signal Oscilloscope)

Pattern trigger identifies trigger terms by checking appointed code. The code is

logical relationship of all channels, with high (H), low (L) and ignore(X).

Figure 2-59 Table 2-35

Menu Settings Comments

Select D15-D0 Choose digital channel for Pattern trigger

Code

H

L X

High Low Ignore Rising Edge Falling Edge

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 2-40

Key Points: H (High): Logic high: voltage is higher than threshold setting. L (Low): Logic low: voltage is lower than threshold setting. X (Ignore): Don’t care. If all the channels are ignored, the oscilloscope won’t be

triggered.

Rising Edge (

) or Falling Edge ( ): Set the code as an edge of the channel,

rising edge or falling edge. When the edge is appointed, if code settings of other channels are all true, the oscilloscope will be triggered on the appointed edge. If no edge is appointed, the oscilloscope will be triggered on the last edge whose code is true.

Edge of appointed code

You can only appoint one code as edge. If you have appointed an edge, then appointed another edge in a different channel, and the first appointed edge will be set to X (Ignore).

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User’s Guide for DS1000 Series

Duration Trigger (Mixed Signal Oscilloscope)

Trigger in appointed time when code terms are satisfied.

Figure 2-60 Table 2-36 (Page One)

Menu Settings Comments

Select D15-D0

Choose digital channel for Duration Trigger

Code

H

L

X

High Low Ignore

Qualifier

< > =

Set time limit terms

Figure 2-61 Table 2-37 (Page Two)

Menu Settings Comments

Time

<

Time

Setting

>

Set duration and limit symbol time

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 2-40

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User’s Guide for DS1000 Series

Key Points: H (High): Logic high: voltage is higher than threshold setting. L (Low): Logic low: voltage is lower than threshold setting. X (Ignore): Don’t care. If all the channels are ignored, the oscilloscope won’t be

triggered.

Qualifier: A timer begins when code terms are satisfied. Duration trigger occurred

in the time set by the qualifier.

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User’s Guide for DS1000 Series

Trigger Settings

In trigger set up menu, you can set up different trigger settings according to different trigger modes. When in the mode of Edge and Pulse, the source is D15-D0 (Mixed Signal Oscilloscope), 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. For Pattern trigger and Duration trigger (Mixed Signal Oscilloscope), only Holdoff can be set. When in Alternative trigger, you can make different settings according to selected different trigger modes.

Figure 2-62 Table 2-38 (Settings for trigger coupling, trigger sensitivity and holdoff)

Menu Settings Comments

Coupling

DC AC HF Reject LF Reject

Allow all signals pass Block DC signals Reject high frequency signals Reject DC and low frequency signals

Sensitivity

< Sensitivity Setting>

Set trigger sensitivity

Holdoff

Set time slot before another trigger event

Holdoff Reset

Reset Holdoff time to 100ns

Figure 2-63 Table 2-39 (Settings for sensitivity and holdoff)

Menu Settings Comments

Sensitivity

Set trigger sensitivity

Holdoff

Set time slot before another trigger event

Holdoff

Reset

Reset Holdoff time to 100ns

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User’s Guide for DS1000 Series

Figure 2-64 Table 2-40 (Settings only for holdoff)

Menu Settings Comments

Holdoff

Set time slot before another trigger event

Holdoff Reset

Reset Holdoff time to 100ns

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User’s Guide for DS1000 Series

Trigger Holdoff

Trigger Holdoff can stabilize complex waveform, such as the 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 2-65: Trigger Holdoff

To use trigger Holdoff:

1. Press the trigger MENU button to display Trigger 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 can reset the Holdoff time to its default value.

Trigger holdoff

Time of holdoff

Trigger site

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User’s Guide for DS1000 Series

Trigger Key points

1. Trigger Source:

Trigger can occur from several sources: Input channels (CH1, CH2 and D15-D0 on mixed signal oscilloscopes), AC Line, Ext, Ext/5.

z CH1 or CH2: It is the most commonly used trigger source. The channel will

work when selected as a trigger source whatever displayed or not.

z Ext Trig: The instrument can trigger from a third source while acquiring

data from CH1 and CH2. For example, you might want to trigger from an external clock or with a signal from another part of the test circuit. The Ext, Ext/ 5 trigger sources use the 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. This allows the oscilloscope to trigger on a larger signal.

z 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 power cord, so you do not have to input an AC trigger signal. When AC Line is selected as trigger source, the oscilloscope

automatically set coupling to DC, set trigger level to 0V.

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.

z 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 occur, the display becomes stable on the screen.

Any factor results in the un-stability of waveforms can be detected by Auto

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User’s Guide for DS1000 Series

Trigger, such as the output of Power supply.

NOTE: When horizontal control is set under 50 ms/div, Auto mode allows the

oscilloscope don’t capture trigger signal.

z 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.

z 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 what part of the signal passes 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 because you can see the events that led up to the trigger point. Everything to the right of the trigger point is called post-trigger information. The amount of delay range (pre-trigger and post-trigger information) available is dependent on the sweep speed selected.

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User’s Guide for DS1000 Series

z 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 DS1000 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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User’s Guide for DS1000 Series

To Set Up the Sampling System

As Figure 2-66 displays, the Acquire button for sampling system is at the MENU

Use Acquire button to pop up the menu as follows:

Table 2-41

Menu Settings Comments

Acquisition

Normal Average Peak Detect

Normal Acquisition mode Average Acquisition mode Peak Detect Acquisition mode

Averages 2 to 256

Step by multiple of two. Set average times from 2 to 256

Sampling

Real-Time Equ-Time

Real-time sampling mode Equivalent sampling mode

Mem Depth

Long Mem Normal

Set up memory as 512K or 1M Set up memory as 1K or 2K

Sa Rate 100.0MSa Display sampling rate

Figure 2-66

Acquire setup button

Figure 2-67

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User’s Guide for DS1000 Series

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

Figure 2-68: Signal that contains noise, and without average sampling

Figure 2-69: Display signal after average sampling

Note:

z Select Real-time acquisition to observe the single-shot or pulse signals. z Select Equ-Time to observe high frequency repetitive signals.

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User’s Guide for DS1000 Series

z To reduce the displayed random noise, select the Average Acquisition. And this

mode would make the screen refresh slower.

z To Avoid signal aliasing, select Peak Detect Acquisition.

Figure 2-70: Signal with Peak Detect Acquisition

The Peak Detect effect is shown as the figure above.

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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User’s Guide for DS1000 Series

Key Points Real-time Sampling:

DS1000 has Real-time sampling rate up to 400MSa/s. At the time base 50ns or faster, the oscilloscopes use the sine(x)/x interpolation to expand the horizontal

time base.

Equivalent sampling:

Also known as Repetitive sampling. In this mode, you can get up to 40 ps of horizontal resolution (equivalent 25Gsa/s). This mode is good for observing

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

Normal:

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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User’s Guide for DS1000 Series

To Set Up the Display System

Figure 2-71 shows the menu button for the display system on the front panel.

Press the Display button to pop up the menu for the settings of the display system.

Figure 2-72 Table 2-42

Menu Setting Comments

Type

Vectors Dots

Display waveforms as vectors Display waveforms as dots

Clear

Clear all existing waveforms from screen

persist

Infinite

OFF

The sample points remain displayed until turn the persistence “OFF”. Turn off the persistence function

Intensity

<

percentage >

Set up waveform intensity

Display setup button

Figure 2-71

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User’s Guide for DS1000 Series

Figure 2-73 Table 2-43

Menu Settings Comments

Grid

Display grids and coordinates on the screen Turn off t h e g r i d s Turn off the grids and coordinates

Brightness

<

percentage >

Set up grid brightness

Menu

Display

1s 2s 5s 10s 20s

Infinite

Set the time before menu fades away. The menu will be hidden after the set time of last button pressing.

Screen

Normal Invert

Set to normal mode

Set to invert color display mode

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.

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

times of oscilloscopes’ refreshing per second and will affect the ability to observe signal.

Adjusting waveform intensity

Default setup of multi-function knob (

) is adjusting waveform intensity.

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User’s Guide for DS1000 Series

To Store and Recall Waveforms or Setups

Figure 2-74 shows the menu button for the storage system on the front panel.

Press the Storage button to pop up the menu for the settings of the storage system. The waveforms and setups in both internal memory and external memory can be stored and recalled. The waveform file, setup file, bitmap and CSV file in external memory can be created and deleted. System supports English/Chinese key in.

Waveform and setup, the menu as following:

Figure 2-75 Table 2-44

Menu Settings Comments

Storage

Waveform 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 2-48)

External

Go to menu for external memory operation (see table 2-49)

Disk Mana.

Go to disk manage menu (see table 2-50)

Storage setup button

Figure 2-74

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User’s Guide for DS1000 Series

For factory default setups, the menu as following:

Figure 2-76 Table 2－45

Menu Settings Comments

Storage

Waveform 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

Load Recall factory setups or files

Disk Mana.

Go to disk manage menu (see table 2-50)

For CSV, the menu as following:

Figure 2-77 Table 2－46

Menu

Settings Comments

Storage

Waveform Setups Bitmap CSV Factory

Store or recall waveform Store or recall setups Create or delete bit map files Create or delete CSV files Recall factory setups

Data Depth

Displayed

Maximum

Save currently displayed waveform data to CSV file Save the whole waveform data in memory to CSV file

Para Save

On Off

Save the current oscilloscope settings in different format with the same file name

External

Go to menu for external memory operation (see table 2-49)

Disk Mana.

Go to disk manage menu (see table 2-50)

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User’s Guide for DS1000 Series

For bitmap, the menu is as follows.

Figure 2-78 Table 2-47

Menu

Settings Comments

Storage

Waveform Setups Bit map CSV Factory

Store or recall waveform Store or recall setups Create or delete bit map files Create or delete CSV files Recall factory setups

Para Save

On Off

Save the current oscilloscope settings in different format with the same file name

External

Go to menu for external memory operation(see table 2-49)

Disk Mana.

Go to disk manage menu (see table 2-50)

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User’s Guide for DS1000 Series

Internal Memory

Press Storage→Internal to go to the following menu.

Figure 2-79 Table 2-48

Menu Settings Comments

Internal

Int_00 (N) . . . Int_09 (N)

Set up the location of files in internal memory

Load

Recall waveform files and setup files from the internal memory location

Save

Save waveform files and setup files to the internal memory location

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User’s Guide for DS1000 Series

External Memory

Press Storage→External to go to the following menu.

Figure 2-80 Table 2-49

Menu Settings Comments

Explorer

Path Directory File

Switch among Path, Directory and File

New File (Folder)

To create new file or folder.

Delete File

(

F

older

)

Delete file(Folder)

Load

Recall waveform and setup from USB storage device.

File system as follows:

Figure 2-81

Files

File info.

Current directory

Back to previous folder

Path

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User’s Guide for DS1000 Series

Disk Manage

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

Figure 2-82 Table 2-50

Menu Settings Comments

Explorer

Path Directory File

Switch among Path, Directory and File

New folder

To create new folder( same as new files, see table 2-13)

Delete File Delete file

Load

Recall waveform, setup, recorded waveform, Pass/Fail file

Figure 2-83 Table 2-51

Menu Settings Comments

Rename To rename a file (see table 2-52)

Disk info Display disk information

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