VOLTCRAFT DSO4084B, DSO4104B, DSO4204B, DSO4254B, DSO4084C User guide

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DSO4000B(C) Series

Digital Storage Oscilloscope

User Manual

（Version 1.0）

Digital Storage Oscilloscope I

Copyright Declaration

All rights reserved; no part of this document may be reproduced or transmitted in any form or by any means, electronic or mechanical, without prior written permission from Hantek Technologies Co., Ltd (hereinafter referred to as ‘Hantek’). Hantek reserves all rights to modify this document without prior notice. Please contact Hantek for the latest version of this document before placing an order. Hantek has made every effort to ensure the accuracy of this document but does not guarantee the absence of errors. Moreover, Hantek assumes no responsibility in obtaining permission and authorization of any third party patent, copyright or product involved in relation to the use of this document.

Digital Storage Oscilloscope II

General Safety Summary

Read the following safety precautions to avoid injury and prevent damage to this product or any products connected to it. To evade potential hazards, use this product only as specified.

Only qualified personnel should perform maintenance. Avoid fire or personal injury. Use suitable power cord. Use only the power cord specified for this product and

certified for the country of use. Connect and disconnect properly. Connect a probe with the oscilloscope before it is connected to measured circuits; disconnect the probe from the oscilloscope after it is disconnected from measured circuits. Ground the product. This product is grounded through the grounding 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 product, ensure that the product is properly grounded. Connect the probe in a right way. The probe ground lead is at ground potential. Do not connect the ground lead to an elevated voltage. Check all terminal ratings. To avoid fire or shock hazard, check all ratings and markings on the product. Refer to the product manual for detailed information about ratings before making connections to the product. Do not operate without covers. Do not operate this product with covers or panels removed. Avoid exposed circuitry. Do not touch exposed connections and components when power is present. Do not operate with suspected failures. If you suspect there is damage to this product, have it inspected by qualified service personnel.

Assure good ventilation. Do not operate in wet/damp environments. Do not operate in an explosive atmosphere. Keep product surfaces clean and dry.

Digital Storage Oscilloscope III

Safety Terms and Symbols

Danger It represents that harms may be caused to you at once if you perform the

operation.

Warning It represents that latent harms may be caused to you if you perform the

operation.

Notice It represents the damage possibly caused to the product or other

properties if you perform the operation.

Notice

Please read

the manual

Protective

ground terminal

Measuring

ground terminal

Chassis

ground terminal

Terms on the product. The following terms may appear on the product:

Characters on the product. The following characters may appear on the product:

Product Scrapping

Device Recycling

We need extract and utilize natural resources to produce this device. If you do not reclaim the device in a proper way, some substances it contains may become harmful or poisonous to environments or human bodies. To avoid them being released outside and to minimize the waste of natural resources, we suggest you reasonably call back this device to ensure proper recovery and recycling of most materials within it.

Digital Storage Oscilloscope IV

Model

Channels

Bandwidth

Sample Rate

AFG

DSO4084B

80MHz

1GS/s

DSO4104B

100MHz

1GS/s

DSO4204B

200MHz

1GS/s

DSO4254B

250MHz

1GS/s

DSO4084C

80MHz

1GS/s

Yes

DSO4104C

100MHz

1GS/s

Yes

DSO4204C

200MHz

1GS/s

Yes

DSO4254C

250MHz

1GS/s

Yes

Brief Introduction to the Series of digital storage oscilloscope

DSO4000B(C) Series oscilloscopes cover the bandwidths from 80MHz to 200MHz, and provide the real-time up to 1GSa/s. In addition, they have 7 inch color TFT LCD as well as WINDOWS-style interfaces and menus for easy operation. What’s more, the plenty menu information and the easy-to-operate buttons allow you to gain information as much as possible in measurement; the multifunctional knobs and the powerful shortcut keys help you save a lot of time in operation; the Autoset function lets you detect sine and square waves automatically; the Probe Check Wizard guides you to adjust the probe compensation and set the Probe option attenuation factor. By using the three methods the oscilloscope provides (context-sensitive, hyperlinks, and an index), you may master all operations on the device in quite a short time so as to greatly improve your efficiency in production and development.

Digital Storage Oscilloscope IV

General Safety Summary ................................ ...................................................... III

Safety Terms and Symbols ................................................................................... IV

Product Scrapping ................................................................................................ IV

Brief Introduction to the Series of digital storage oscilloscope ............................... IV

Contents ................................................................................................................... V

Chapter 1 Introduction ........................................................................................ 1

1.1 General Inspection ................................................................................... 2

1.2 Prepare Instrument for Use ....................................................................... 3

1.3 Accidence of front panel and the user interface ........................................ 1

1.3.1 User Interface ...................................................................................... 1

1.4 Functional Check ...................................................................................... 3

1.4.1 Connect the oscilloscope ..................................................................... 3

1.4.2 Observe the waveform ......................................................................... 3

1.5 Probe Introduction .................................................................................... 4

1.5.1 Safety .................................................................................................. 4

1.5.2 Use of Probe Check Wizard ................................ ................................. 4

1.5.3 Manual Probe Compensation ............................................................... 4

1.5.4 Probe Attenuation Setting..................................................................... 5

Chapter 2 Function Introduction ........................................................................ 7

2.1 Menu and control keys .............................................................................. 8

2.2 Connector ................................................................................................. 9

2.3 Default setups ........................................................................................... 9

2.4 Multi-functional Knobs and Buttons ......................................................... 10

2.5 Oscilloscope Setup ................................................................................. 10

2.6 Horizontal Controls ................................................................................. 11

2.6.1 Scan Mode Display (Roll Mode) ......................................................... 12

2.7 Vertical System ....................................................................................... 12

Digital Storage Oscilloscope V

2.7.1 Vertical Controls ................................................................................. 12

2.7.2 Math FFT ........................................................................................... 15

2.8 Trigger System ....................................................................................... 20

2.8.1 Trigger Controls ................................................................................. 21

2.8.2 Holdoff ................................................................ ............................... 40

2.9 SAVE/RECALL ....................................................................................... 40

2.10 MEASURE System ................................................................................. 42

2.10.1 Scale measurement....................................................................... 42

2.10.2 Cursor measurement ..................................................................... 43

2.10.3 Automatic Measurement ................................................................ 44

2.11 ACQUIRE ............................................................................................... 47

2.12 DISPLAY ................................................................................................ 51

2.12.1 XY Format ..................................................................................... 51

2.13 UTILITY System ..................................................................................... 52

2.13.1 51BFirmware Update ........................................................................... 52

2.13.2 52BSelf Calibration .............................................................................. 53

2.13.3 56BPass/fail ........................................................................................ 53

2.14 Fast Action Buttons ................................................................................. 55

2.14.1 AUTOSET ................................................................ ..................... 55

2.14.2 Default Setup ................................................................................ 57

Chapter 3 Waveform Generator ........................................................................ 60

Chapter 4 Troubleshooting ............................................................................... 62

4.1 Problem Settlement ................................................................................ 62

Chapter 5 Services and Support ...................................................................... 90

Chapter 6 General Care and Cleaning ............................................................. 91

6.1 General Care .......................................................................................... 91

6.2 Cleaning ................................................................................................. 91

Appendix A: Technical Specifications ................................................................... 92

Appendix B: Accessories ....................................................................................... 99

Digital Storage Oscilloscope VI

Appendix C Harmful and Poisonous Substances or Elements .......................... 100

Digital Storage Oscilloscope VII

Chapter 1 Introduction

 General Inspection

 Prepare Instrument for Use

 Accidence of front panel and the user interface

 Functional Check

 Probe Introduction

1.1 General Inspection

Please check the instrument as following steps after receiving an oscilloscope:

Check 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 been checked mechanically and electrically.

Check the accessories:

Accessories supplied with the instrument are listed in "Accessories" in this guide. If the contents are incomplete or damaged, please notify the franchiser.

Check the instrument:

In case there is any mechanical damage or defect, or the instrument does not operate properly or fails performance tests, please notify the franchiser.

1.2 Prepare Instrument for Use

Adjust the Supporting Legs

Adjust the supporting legs properly to use them as stands to tilt the oscilloscope upwards for stable placement of the oscilloscope as well as better operation and observation.

Connect the Power Cord

Connect the power cord as desired. Turn the instrument on by pressing the power switch in the lower left corner of front panel. If the instrument does not turn on, verify that the power cord is firmly connected (power-line voltage is automatically sensed at power-on). Also make sure that the instrument is connected to an energized power source. Power Switch:

To turn off the instrument, please press power switch.

1.3 Accidence of front panel and the user interface

This section will make you understand the front operation panel of this series of digital oscilloscope at first before use.

1.3.1 User Interface

Figure 1-2 Interface display

1. Hantek logo

2. Trigger Status:

Auto: The oscilloscope works in auto mode and is acquiring waveforms in the

absence of triggers.

Ready: All pre-triggered data have been acquired and the oscilloscope is ready to

accept a trigger.

Roll: The oscilloscope is acquiring and displaying waveform data continuously in

roll mode.

Stop: The oscilloscope has stopped acquiring waveform data.

Digital Storage Oscilloscope 1

3. Readout shows main time base setting.

4. Sample rate.

5. Main Time Base Window

6. Tigger time

7. Trigger level, Readout tells trigger level

8. Operating Menu shows different information for respective function keys.

9. If this icon lights up/active, it means the USB disk has been connected.

10. If this icon lights up/active, it means the wave generator works

11. The information of coupling, Bandwidth and volt/div of CH1~CH4.

12. Channel Marker

13. Window displays waveform.

Digital Storage Oscilloscope 2

CH1: to connect with the probe

PROBE COMP

1.4 Functional Check

Follow the steps below to perform a quick functional check to your oscilloscope.

1.4.1 Connect the oscilloscope

Set the switch on the probe to 10X and connect the probe to Channel 1 on the oscilloscope. First, align the slot in the probe connector with the protuberance on the CH1 BNC and push to connect; then, turn to right to lock the probe in place; after that, connect the probe tip and reference lead to the PROBE COMP connectors. There is a mark on the panel: Probe COMP ~2V@1KHz.

1.4.2 Observe the waveform

Press the AUTOSET button and you should see within a few seconds a square wave of about 2V peak-to-peak at 1KHz in the display. Press the CH1 MENU button twice to remove Channel 1. Push the CH2 MENU button and repeat Step 2 and Step 3 to observe CH2, CH3 and CH4.

Digital Storage Oscilloscope 3

1.5 Probe Introduction

1.5.1 Safety

When using the probe, keep your fingers behind the guard on the probe body to avoid electric shock. Do not touch metallic portions of the probe head while it is connected to a voltage source. Connect the probe to the oscilloscope and connect the ground terminal to ground before you start any measurements.

1.5.2 Use of Probe Check Wizard

Every time you connect a probe to an input channel, you should use the probe check wizard to verify that this probe is operating correctly. There are two ways to do this: Use the vertical menu (for example, push the CH1 MENU button) to set the Probe option attenuation factor. Press the PROBE CHECK button to use the Probe Check Wizard and configure the probe option attenuation factor properly following menu prompts.

1.5.3 Manual Probe Compensation

Upon the first connection of a probe and an input channel, you should manually perform this adjustment to match the probe to the input channel. Uncompensated or miscompensated probes may lead to errors or faults in measurement. To adjust the probe compensation, follow the steps below.

1. Set the Probe option attenuation in the channel menu to 10X. Set the switch on

the probe to 10X and connect the probe to Channel 1 on the oscilloscope. If you use the probe hook-tip, ensure it is firmly inserted onto the probe. Attach the probe tip to the PROBE COMP ~2V@1KHz connector and the reference lead to

Digital Storage Oscilloscope 4

Compensated correctly

Overcompensated

Undercompensated

the PROBE COMP Ground connector. Display the channel and then press the AUTOSET button.

2. Check the shape of the displayed waveform.

3. If necessary, use a nonmetallic screwdriver to adjust the variable capacity of your

probe until the shape of the waveform turns to be the same as the above figure. Repeat this step as necessary. See the figure below for the way of adjustment.

1.5.4 Probe Attenuation Setting

Probes are of various attenuation factors which affect the vertical scale of the signal. The Probe Check function is used to verify if the Probe attenuation option matches the attenuation of the probe. As an alternative method to Probe Check, you can push a vertical menu button (such as the CH 1 MENU button) and select the Probe option that matches the attenuation factor of your probe. Make sure that the Attenuation switch on the probe matches the Probe option in the oscilloscope. Switch settings are 1X and 10X. When the Attenuation switch is set to 1X, the probe limits the bandwidth of the oscilloscope to 6MHz. To use the full bandwidth of the oscilloscope, be sure to set the

Digital Storage Oscilloscope 5

switch to 10X.

Digital Storage Oscilloscope 6

Chapter 2 Function Introduction

This chapter provides some general information that you need to learn before using an oscilloscope. It contains:

 Menu and control keys

 Connector

 Default setups

 Multi-functional Knobs and Buttons

 Oscilloscope Setup

 Horizontal Controls

 Vertical System

 Trigger System

 SAVE/RECALL

 MEASURE System

 ACQUIRE

 DISPLAY

 UTILITY System

 Fast Action Buttons

Digital Storage Oscilloscope 7

2.1 Menu and control keys

As shown in the figure below:

Figure 2-1 Control keys

All the keys are described as follows:

 [CH1], [CH2], [CH3], [CH4]: display setup menus of channel 1 and channel 2.  [Math]: display “Arithmetical operation” waveform menu.  [Horizontal]: display “HORIZONTAL” menu.  [Trig Menu]: display “TRIGGER” control menu.  [Force Trig]: It is used for finishing acquisition of the current waveform no matter

whether the oscilloscope detects trigger, and it is mainly applied to “NORMAL” and “SINGLE” in the trigger mode.

 [Default]: recall the default factory setup.  [Help]: enter the on-line help system.  [Utility]: display “UTILITY FUNCTION” menu.  [Cursors]: display the “CURSOR” menu. The [V0] knob can be used for

regulating the position of the cursor when the “CURSOR” menu is displayed and

the cursor is triggered.

 [Meas]: show the “Measure” menu.  [Wave Gen]: show the waveform generator menu.  [Save Recall]: show the “Save/Recall” menu of setups and waveform..  [Display]: show the “Display” menu.  [Auto Scale]: automatically set the control state of the oscilloscope so as to

display suitable waveform.

Digital Storage Oscilloscope 8

 [Run/STtop]: continuously acquire waveform or stop acquisition  [Single]: Acquire a single trigger, finish acquisition and then stop.

2.2 Connector

Figure 2-2 Connector

 CH1, CH2, CH3, CH4: for an input connector of a measured signal.  EXT TRIG: be used as an input connector of an external trigger source. Use

[TRIG MENU] to select “EXT” trigger source, and the trigger signal source can be used for triggering in the third channel while acquiring data in two channels.

 Gen Out: Waveform signal output.  Probe compensation: The probe compensation signal is output and grounded

so that the probe is matched with the channels of the oscilloscope.

2.3 Default setups

The [DEFAULT] key represents the default setup function, most of the options and control setups of the factory are recalled by pressing them, some setups are not changed, and the following setups are not reset:

 Language Option  Saved Reference Waveforms  Saved Settings  Display Contrast

 Calibration Data

Digital Storage Oscilloscope 9

V0: Multi-functional knob. Under different menu options, it supports selecting menu options (MEASURE), moving cursors and levels (Slope Trigger). Press this knob to reset data (trigger holdoff, overtime of the overtime trigger and slope trigger), select menu options and so on. Easy to operate. F7: Push this button in single-window mode to switch between dotted line

F0: Hide/Show button. Push it to hide the menu options on the right side of the screen and give a full screen display of waveforms. Push it again to show the menu options.

F1-F5: These five buttons are all multi-functional. They are in charge of selecting corresponding menu options on the screen in different menu modes. For example, in the UTILITY menu, F1-F5 respectively correspond to ‘System Info’ – ‘Advance’.

F6: This functional button is mainly used to turn pages and confirm a selection, such as ‘next page’, ‘previous page’, and ‘press F6 to confirm’ appearing when you push Self Calibration option.

2.4 Multi-functional Knobs and Buttons

2.5 Oscilloscope Setup

While operating the oscilloscope, you may often use three features: Autoset, saving a setup and recalling a setup. Hereinafter they are introduced one by one. Autoset: This function can be used to adjust the horizontal and vertical scales of the

Digital Storage Oscilloscope 10

oscilloscope automatically and set the trigger coupling, type, position, slope, level and mode, etc., to acquire a stable waveform display. Saving a Setup: By default, the oscilloscope will save the setup each time before being closed, and automatically recall the setup once being turned on. (Note: If you modify the setup, please wait for more than 5 seconds before turning off the oscilloscope to ensure the proper storage of new settings.) You can save 10 settings permanently in the oscilloscope and reset them as necessary. Recalling a Setup: The oscilloscope can recall any of your saved setups or the default factory setup. Default Setup: The oscilloscope is preset for normal operations when it is shipped from the factory. This is the default setup. You may recall this setup at any time for your requirements.

2.6 Horizontal Controls

Use the horizontal controls to change the horizontal scale and position of waveforms. The horizontal position readout shows the time represented by the center of the screen, using the trigger time as zero. When you change the horizontal scale, the waveform will expand or contract to the screen center. The readout near the upper right of the screen shows the current horizontal position in second. M represents ‘Main Time Base’, and W indicates ‘Window Time Base’. The oscilloscope also has an arrow icon at the top of the graticule to indicate the horizontal position.

1. Horizontal Position Knob: Used to control the trigger position against the screen

center. Push this button to reset the trigger point back to the screen center. AN: Used to set the horizontal position as zero.

Digital Storage Oscilloscope 11

Multi-functional

Knob

2.SEC/DIV Knob: Used to change the horizontal time scale so as to magnify or

compress the waveform horizontally. If the waveform acquisition is stopped (by using the RUN/STOP or SINGLE SEQ button), the SEC/DIV control will expand or compress the waveform. In dual-window mode, push this knob to select major or minor window. When the major window is selected, this knob provides the same functions as it provides in single-mode window. When the minor window is selected, turn this knob to scale the waveform whose magnification is up to 1000.

Notes:

1. For more information of the trigger holdoff, see Section Trigger Controls.

2.6.1 Scan Mode Display (Roll Mode)

With the SEC/DIV control set to 80ms/div or slower and the trigger mode set to Auto, the oscilloscope works in the scan acquisition mode. In this mode, the waveform display is updated from left to right without any trigger or horizontal position control.

2.7 Vertical System

2.7.1 Vertical Controls

Vertical controls can be used to display and remove waveforms, adjust vertical scale and position, set input parameters and perform math calculations. Each channel has a separate vertical menu to set. See below for menu description.

Digital Storage Oscilloscope 12

Options

Settings

Comments

Coupling

DC AC GND

DC passes both DC and AC components of the input signal. AC blocks the DC component of the input signal and attenuates signals below 10Hz. Ground disconnects the input signal.

20MHz Bandwidth Limit

Limit Off Limit On

Limits the bandwidth to reduce display noise; filters the signal to eliminate noise and other unnecessary HF components.

DIV

Coarse Fine

Selects the resolution of the VOLTS/DIV knob. Coarse defines a 1-2-5 sequence. Fine changes the resolution to small steps between the Coarse settings.

Position

Volt/div

1. Vertical Position Knob: Move the channel waveform up and down on the screen.

In dual-window mode, move the waveforms in both windows at the same time in a same direction. Push this knob to return waveforms to the vertical center position on the screen. Two channels correspond to two knobs.

2. VOLTS/DIV Knob

Control the oscilloscope to magnify or attenuate the source signal of the channel waveform. The vertical size of the display on the screen will change (increase or decrease) to the ground level. Also you may use this knob to switch between coarse and fine.

3. Menu (CH1, CH2, Ch3, CH4): Display vertical menu options; turn on or off the

display of channel waveforms.

Digital Storage Oscilloscope 13

Probe Attenuation

1X 10X 100X 1000X

Selects a value according to the probe attenuation factor so as to ensure correct vertical readouts. Reduce bandwidth to 6MHz when using a 1X probe.

Invert

Off On

Inverts the waveform relative to the reference level.

Operations

Source Options

Comments

Operator

+, -, *, /, FFT

FFT

CH1, CH2 CH3, CH4

Five types of window available for selection: Hanning, Flattop, Rectangular,Bartletta and Blackman

Coupling

 If the channel adopts a DC coupling mode, you can quickly measure the DC

component of the signal by observing the difference between the waveform and the signal ground.

 If the channel adopts an AC coupling mode, the DC component in the signal is

filtered. By this mode, the AC component of the signal is displayed at a higher sensitivity.

 If the channel adopts a GND coupling mode, cut off the input signal. Inside the

channel, the channel input is connected with a zero volt reference electric level.

Fine Resolution

In the fine resolution setting, the vertical scale readout displays the actual VOLTS/DIV setting. The vertical scale changes only after you adjust the VOLTS/DIV control and set to coarse.

Remove Waveform Display

To remove a waveform from the screen, first push the menu button to display the vertical menu, then push again to remove the waveform. A channel waveform which is unnecessary to be displayed can be used as a trigger source or for math operations.

4. MATH MENU: Display the waveform math operations. See the table below for

details.

The MATH menu contains source options for all math operations.

Digital Storage Oscilloscope 14

Zoom: Use the FFT Zoom button to adjust the window size. Scale: x1, x2, x5, x10.

Note: All selected menus are highlighted in orange.

2.7.2 Math FFT

This chapter elaborates how to use the Math FFT (Fast Fourier Transform). You can use the Math FFT mode to convert a time-domain (YT) signal into its frequency components (spectrum), and to observe the following types of signals:

 Analyze harmonics in power cords;  Measure harmonic content and distortion in systems;  Characterize noise in DC power supplies;  Test impulse response of filters and systems;  Analyze vibration.

To use the Math FFT mode, perform the following tasks:

 Set the source (time-domain) waveform;  Display the FFT spectrum;  Choose a type of FFT window;  Adjust the sample rate to display the fundamental frequency and harmonics

without aliasing;

 Use zoom controls to magnify the spectrum;  Use cursors to measure the spectrum.

2.7.2.1 Setting Time-domain Waveform

It is necessary to set the time-domain (YT) waveform before using the FFT mode. Follow the steps below.

1. Push the AUTOSET button to display a YT waveform.

2. Turn the VERTICAL POSITION knob to vertically move the YT waveform to the

center (zero division) so as to ensure the FFT will display a true DC value.

3. Turn the HORIZONTAL POSITION knob to position the part of the YT waveform to

be analyzed in the center eight divisions of the screen. The oscilloscope uses the 2048 center points of the time-domain waveform to calculate the FFT spectrum.

Digital Storage Oscilloscope 15

4. Turn the VOLTS/DIV knob to ensure the entire waveform remains on the screen. If

the entire waveform is invisible, the oscilloscope may display wrong FFT results by adding high-frequency components.

5. Turn the SEC/DIV knob to provide the resolution you need in the FFT spectrum.

6. If possible, set the oscilloscope to display multiple signal cycles.

If you turn the SEC/DIV knob to select a faster setting (fewer cycles), the FFT spectrum will display a larger frequency range and reduce the possibility of FFT aliasing. To set the FFT display, follow the steps below.

1. Push the MATH MENU button;

2. Set the Operation option to FFT;

3. Select the Math FFT Source channel.

In many situations, the oscilloscope can also generate a useful FFT spectrum despite the YT waveform not being triggered. This is especially true if the signal is periodic or random (such as noise).

Note: You should trigger and position transient or burst waveforms as close as possible to the screen center.

Nyquist Frequency

The highest frequency that any real-time digital oscilloscope can measure without errors is half of the sample rate, which is called the Nyquist frequency. Frequency information beyond the Nyquist frequency is undersampled which brings about the FFT aliasing. The math function can convert the center 2048 points of the time-domain waveform to an FFT spectrum. The resulting FFT spectrum contains 1024 points from DC (0Hz) to the Nyquist frequency. Usually, the screen compresses the FFT spectrum horizontally to 250 points, but you can use the FFT Zoom function to expand the FFT spectrum so that you can clearly view the frequency components at each of the 1024 data points in the FFT spectrum.

Note: The oscilloscope’s vertical response is a little bit larger than its bandwidth (60MHz, 70MHz, 100MHz or 200MHz, depending on the model; or 20MHz when the Bandwidth Limit option is set to Limited). Therefore, the FFT spectrum can display valid frequency information above the oscilloscope bandwidth. However, the amplitude information near or above the bandwidth will not be accurate.

Digital Storage Oscilloscope 16

Math FFT

Options

Settings

Comments

Source

CH1, CH2

Choose a channel to be the FFT source.

Window

Hanning, Flattop,

Rectangular,Bartle

tta and Blackman

Select a type of the FFT window. For more information

FFT Zoom

X1, X2, X5, X10

Change the horizontal magnification of the FFT display. For detailed information

Vertical Base

Vrms

dBrms

Set the Vertical Base in a mode.

2.7.2.2 Displaying FFT Spectrum

Push the MATH MENU button to display the Math menu. Use the options to select the Source channel, the Window algorithm and the FFT Zoom factor. Only one FFT spectrum can be displayed at a time.

2.7.2.3 Selecting FFT Window

Using windows can eliminate the spectral leakage in the FFT spectrum. The FFT algorithm assumes that the YT waveform repeats all the time. When the number of cycles is integral (1, 2, 3 ...), the YT waveform starts and ends at the same amplitude and there are no discontinuities in the signal shape. If the number of cycles is nonintegral, the YT waveform starts and ends at different amplitudes and transitions between the start and end points will cause discontinuities in the signal that introduces high-frequency transients.

Digital Storage Oscilloscope 17

Window

Measurement

Characteristics

Hanning

Periodic Waveform

Better frequency, poorer amplitude accuracy than Flattop

Flattop

Periodic Waveform

Better amplitude, poorer frequency accuracy than Hanning

Rectangular

Pulse or Transient Waveform

Special-purpose window applicable to discontinuous waveforms. This is actually the same as no windows.

Blackman

Best magnitude,worst frequency resolution

Single frequency waveforms, to Find higher order harmonics.

Applying a window to the YT waveform changes the waveform so that the start and stop values are close to each other, which reduces the discontinuities. The Math FFT function has three FFT Window options. There is a trade-off between frequency resolution and amplitude accuracy for each type of window. You shall determine which one to choose according to the object you want to measure and the source signal characteristics.

2.7.2.4 FFT Aliasing

Problems occur when the time-domain waveform acquired by the oscilloscope contains frequency components higher than the Nyquist frequency. The frequency components above the Nyquist frequency will be undersampled and displayed as lower frequency components that ‘fold back’ from the Nyquist frequency. These erroneous components are called aliases.

Digital Storage Oscilloscope 18

2.7.2.5 Eliminating Aliases

To eliminate aliases, use the following methods.  Turn the SEC/DIV knob to set a faster sample rate. Because the Nyquist

frequency increases as you increase the sample rate, the aliased frequency components will be displayed correct. If too many frequency components appear on the screen, you may use the FFT Zoom option to magnify the FFT spectrum.

 If there is no need to observe the frequency components above 20MHz, set the

Bandwidth Limit option to Limited.

 Filter the signal input from outside and limit the bandwidth of the source

waveform to lower than the Nyquist frequency.

 Identify and ignore the aliased frequencies.  Use zoom controls and cursors to magnify and measure the FFT spectrum.

2.7.2.6 Magnifying and Positioning FFT Spectrum

You may scale the FFT spectrum and use cursors to measure it through the FFT Zoom option which enables the horizontal magnification. To vertically magnify the spectrum, use the vertical controls.

Horizontal Zoom and Position

You can use the FFT Zoom option to magnify the FFT spectrum horizontally without changing the sample rate. The available zoom factors are X1(default), X2, X5 and X10. When the zoom factor is set to X1 and the waveform is located at the center graticule, the left graticule line is at 0Hz and the right is at the Nyquist frequency. You magnifies the FFT spectrum to the center graticule line when you change the zoom factor. That is, the axis for horizontal magnification is the center graticule line. Turn the Horizontal Position knob clockwise to move the FFT spectrum to the right. Push the SET TO ZERO button to position the center spectrum at the center of the graticule.

Vertical Zoom and Position

When the FFT spectrum is being displayed, the channel vertical knobs become the zoom and position controls corresponding to their respective channels. The VOLTS/DIV knob provides the following zoom factors: X1(default), X2, X5 and X10. The FFT spectrum is magnified vertically to the marker M (math waveform reference

Digital Storage Oscilloscope 19

point on the left edge of the screen). Turn the VERTICAL POSITION knob clockwise to move up the spectrum.

2.7.2.7 Using Cursors to Measure FFT Spectrum

You may use cursors to take two measurements on the FFT spectrum: amplitude (in dB) and frequency (in Hz). Amplitude is referenced to 0db that equals 1VRMS here. You may use cursors to measure at any zoom factor. Push the CURSOR button, choose the Source option and then select Math. Press the Type option button to select between Amplitude and Frequency. Click the SELECT CURSOR option to choose a cursor. Then use the V0 knobs to move Cursor S and Cursor E. Use the horizontal cursor to measure the amplitude and the vertical cursor to measure the frequency. Now the display at the DELTA menu is just the measured value, and the values at Cursor S and Cursor E. Delta is the absolute value of Cursor S minus Cursor E.

2.8 Trigger System

The trigger determines when the oscilloscope begins to acquire data and display a waveform. Once a trigger is properly set up, the oscilloscope can convert unstable displays or blank screens to meaningful waveforms. Here introduce some basic concepts about trigger. Trigger Source: The trigger can be generated with multiple sources. The most common one is the input channel (alternative between CH1~CH4). Whether the input signal is displayed or not, it can trigger normal operations. Also the trigger source can be any signal connected to an external trigger channel or the AC power line (only for Edge triggers). The source with the AC power line shows the frequency relationship between the signal and the AC commercial power. Trigger Mode: You can select the Auto or Normal mode to define how the oscilloscope acquires data when it does not detect a trigger condition. Auto Mode performs the acquisition freely in absence of valid trigger. It allows the generation of untriggered waveforms with the time base set to 80ms/div or slower. Normal Mode updates the displayed waveforms only when the oscilloscope detects a valid trigger condition.

Digital Storage Oscilloscope 20

Trigger slope can be rising or falling

Rising Edge

Falling Edge

Trigger level can be adjusted vertically

Before this update, the oscilloscope still displays the old waveforms. This mode shall be used when you want to only view the effectively triggered waveforms. In this mode, the oscilloscope displays waveforms only after the first trigger. To perform a single sequence acquisition, push the SINGLE SEQ button. Trigger Position: The horizontal position control establishes the time between the trigger position and the screen center. Slope and Level: The Slope and Level controls help to define the trigger. The Slope option determines whether the trigger point is on the rising or falling edge of a signal. To perform the trigger slope control, press the TRIG MENU button, select an Edge trigger, and use the Slope button to select rising or falling. The TRIGGER LEVEL knob controls the trigger point is on which position of the edge.

2.8.1 Trigger Controls

The trigger can be defined through the Trigger Menu and front-panel controls. There are six types of trigger: Edge, Video, Pulse Width, Alter, Slope and Overtime. Refer to the following tables to find a different set of options for each type of trigger.

1. Level

It sets the amplitude level the signal must cross to cause an acquisition when using the Edge or Pulse Width trigger.

Digital Storage Oscilloscope 21

2. Force Trigger

Used to complete an acquisition regardless of an adequate trigger signal. This button becomes useless if the acquisition is already stopped.

3. TRIG Type

DSO4000B(C) provides multiple advanced trigger functions, including various serial bus triggers.

 Edge trigger  Pulse trigger  Video trigger  Slope trigger  DropOut trigger  Window trigger  Pattern trigger  Interval trigger  Runt trigger  UART trigger  LIN trigger  CAN trigger  SPI trigger  IIC trigger

2.8.1.1 Edge Trigger

Edge trigger distinguishes the trigger points by seeking the specified edge (rising, falling, rising & falling) and trigger level.

1. Press the [TRIG MENU] button on the front panel to enter the Trigger system

function menu.

Digital Storage Oscilloscope 22

2. Press the Type softkey, turn the Universal Knob to set select “Edge” and then push

the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1, CH2, CH3, CH4,

as the trigger source.

4. Press the Slope softkey, turn the Universal Knob to select the desired trigger edge

(rising, falling or rising & falling), and then press down the knob to confirm.

5. Turn the Trigger Level Knob to adjust the trigger level to obtain stable trigger.

Note: Press the AUTO SET button will set the trigger type to Edge and slope to rising.

2.8.1.2 Pulse Trigger

Trigger on the positive or negative pulse with a specified width.

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER function

menu.

2. Press the Type softkey, turn the Universal Knob to select Pulse and then push the

knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the

trigger source.

4. Turn the Trigger Level Knob to adjust the trigger level to the desired place.

5. Press the Polarity softkey to select Positive or Negative pulse that to trigger on. The

current trigger polarity is displayed at the upper right corner of the screen.

6. Press the When softkey, turn the Universal Knob to select the desired condition,

and push down the knob to confirm.

 < (less than a time value): trigger when the positive or negative slope time of

the input signal is lower than the specified time value.

For example, for a positive pulse, if you set t (pulse real width) < 100ns, the

Digital Storage Oscilloscope 23

waveform will trigger.

 > (greater than a time value): trigger when the positive or negative slope

time of the input signal is greater than the specified time value. For example, for a positive pulse, if you set t (pulse real width) >100ns, the waveform will trigger.

 != (not equal to time value): trigger when the positive or negative slope time

of the input signal is not equal to the specified time value.

 = (equal to time value): trigger when the positive or negative slope time of

the input signal is equal to the specified time value. For example, for a positive pulse, if you set t (pulse real width) = 200ns, the waveform will trigger.

6. Press the Next Page softkey and press of Lower Upper softkey to select Lower or Upper the trigger level; then turn the Trigger Level Knob to adjust the position.

The trigger level values are displayed at the upper right corner of the screen. Trigger When: The pulse width of the source must be ≥5ns so that the oscilloscope can detect the pulse.

Digital Storage Oscilloscope 24

Triggers when pulse is equal to width setting ±5%

= Trigger Point

Threshold level

Triggers when pulse is greater than width setting

Triggers when pulse is not equal to width setting ±5%

Tolerance

Threshold level

Triggers when pulse is less than width setting

＝, ≠: Within a ±5% tolerance, triggers the oscilloscope when the signal pulse

width is equal to or not equal to the specified pulse width.

＜, ＞: Triggers the oscilloscope when the source signal pulse width is less than

or greater than the specified pulse width.

2.8.1.3 Video Trigger

Video triggering can be used to capture the complicated waveforms of most standard analog video signals. The trigger circuitry detects the vertical and horizontal interval of the waveform and produces triggers based on the video trigger settings you have selected. DSO4000 supports standard video signal field or line of NTSC (National Television Standards Committee), PAL (Phase Alternating Line) and custom video signal trigger.

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER function menu.

Digital Storage Oscilloscope 25

2. Press the Type softkey, then turn the Universal Knob to select Video and push down the knob to confirm.

3. Press the Source softkey’ turn the Universal Knob to select CH1~CH4 as the trigger source.

4. Press the Standard softkey to select the desired video standard. DSO4000 supports the following video standards:

2.8.1.4 Slope Trigger

The slope trigger looks for a rising or falling transition from one level to another level in the specified time range. In DSO4000, positive slope time is defined as the time difference between the two crossing points of trigger level line A and B with the positive edge as shown in the figure below.

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey, turn the Universal Knob to set select Slop and then push the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the trigger source.

4. Press the Slop softkey, turn the Universal Knob to set select the desired trigger edge (rising or falling), and then push down the knob to confirm.

5. Press the Level softkey and press of Lower Upper softkey to select Lower or Upper the trigger level; then turn the Trigger Level Knob to adjust the position. The trigger level values are displayed at the upper right corner of the screen.

6. Press the When softkey, then turn the Universal Knob to select the desired slope condition, and push down the knob to confirm.

 < (less than a time value): trigger when the positive or negative slope time of

Digital Storage Oscilloscope 26

the input signal is lower than the specified time value.

 > (greater than a time value): trigger when the positive or negative slope

time of the input signal is greater than the specified time value.

 !=(not equal to a time value): trigger when the positive or negative slope time

of the input signal is not equal to the specified upper limit of time and lower than the specified lower limit of time value..

 =(equal to a time value): trigger when the positive or negative slope time of

the input signal is equal to the specified upper limit of time and lower than the specified lower limit of time value.

2.8.1.5 Overtime Trigger

Trigger when the time interval (△ T) from when the rising edge (or falling edge) of the input signal passes through the trigger level to when the neighboring falling edge (or rising edge) passes through the trigger level is greater than the timeout time set, as shown in the figure below.

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system function menu.

2. Press the Type softkey, then use the Universal Knob to select Overtime and push down the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the trigger source. Select channel with signal input as trigger source to obtain stable trigger.

4. Press the Polarity softkey to select Positive or Negative edge.

5. Press the Time softkey, turn the Universal Knob to select the desired value.

Digital Storage Oscilloscope 27

2.8.1.6 Window Trigger

Windows trigger provides a high trigger level and a low trigger level. The instrument triggers when the input signal passes through the high trigger level or the low trigger level.

 If the lower and the upper trigger levels are both within the waveform

amplitude range, the oscilloscope will trigger on both rising and falling edge.

 If the upper trigger level is within the waveform amplitude range while the

lower trigger level is out of the waveform amplitude range, the oscilloscope will trigger on rising edge only.

 If the lower trigger level is within the waveform amplitude range while the

upper trigger level is out of the waveform amplitude range, the oscilloscope will trigger on falling edge only.

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER function menu.

2. Press the Type softkey, then use the Universal Knob to select Window and push down the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the trigger source.

4. Press Level softkey to select Lower or Upper trigger level or both level, then turn the Trigger Level Knob to adjust the position. The trigger level values are displayed at the upper right corner of the screen.

2.8.1.7 Pattern Trigger

The Pattern trigger identifies a trigger condition by looking for a specified pattern. The

Digital Storage Oscilloscope 28

pattern trigger can be expanded to incorporate delays similar to other triggers. Pattern durations are evaluated using a timer. The timer starts on the last edge that makes the

pattern ―true‖. Potential triggers occur on the first edge that makes the pattern false,

provided that the time qualifier criterion has been met.SDS2000Xprovides 4 patterns: logical AND, OR, NAND and NOR combination of the channels. Each channel can set to low, high or invalid.

Interval Trigger

Trigger when the time difference between the neighboring rising or falling edges meets the time limit condition (<, >, !=, =).

To set interval trigger:

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system function menu.

2. Press the Type softkey, then use the Universal Knob to select Interval and push down the knob to confirm.

Digital Storage Oscilloscope 29

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the trigger source.

4. Press the Slope softkey to select rising or falling edge.

5. Press the When softkey, turn the Universal Knob to select desired condition.

 < (less than a time value): trigger when the positive or negative pulse time of

the input signal is less than the specified time value.

 > (greater than a time value): trigger when the positive or negative pulse

time of the input signal is greater than the specified time value.

 != (not equal to a time value): trigger when the positive or negative pulse

time of the input signal is not equal to the specified limit of time.

 = (equal to a time value): trigger when the positive or negative pulse time of

the input signal is equal to the specified limit of time.

6. Press the When softkey (<, >, !=, =), turn the Universal Knob to select the desired value.

2.8.1.8 Runt Trigger

The Runt trigger looks for pulses that cross one threshold but not another as shown in the picture below.

A positive runt pulse across through a lower threshold but not an upper threshold. A negative runt pulse across through an upper threshold but not a lower threshold.

To trigger on runt pulse:

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system function menu.

Digital Storage Oscilloscope 30

2. Press the Type softkey, then turn the Universal Knob to select Under Amp and push down the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4as the trigger source.

4. Press the Polarity softkey to select Positive or Negative pulse to trigger.

5. Press the When softkey, turn the Universal Knob to select the desired condition (<, >, != or =).

6. Press the Width softkey, and then turn the Universal Knob to select the desired value.

7. Press the Next Page softkey to enter the second page of the TRIGGER system function menu. Press the Level softkey to select Lower or Upper trigger level, and the turn the Universal Knob to set the position.

2.8.1.9 UART Triggering

To trigger on UART trigger:

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system function menu.

2. Press the Type softkey, then turn the Universal Knob to select UART and push down the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the trigger source.

4. Set the following parameters.

Idle Level - Set the idle level High or Low to match your device under test

Baud - Press the Baud Rate softkey, then press the Universal Knob and select a baud rate to match the signal in your device under test. If the desired baud rate is not listed, select Custom on the Baud softkey, and then press the Custom softkey and turn the Universal Knob to set the desired baud rate.

- Parity Check, Choose odd, even, or none, based on your device under test.

Bits - Data Length, Set the number of bits in the UART2 words to match your

device under test (selectable from 5-8 bits).

Digital Storage Oscilloscope 31

Press the When softkey and set up the desired trigger condition:

Start - The oscilloscope triggers when a start bit occurs.

Stop - Triggers when a stop bit occurs on measured signal. The trigger occurs on the first stop bit regardless of using 1, 1.5 or 2 stop bit.

Spec Data - Triggers on a data byte that you specify. For use when the device under test data words are from 5 to 8 bits in length

a. Press the When softkey, and choose an equality qualifier. You can choose equal

to(=), not equal to(!=), less than(<), or greater than(>) a specific data value.

b. Use the Data softkey to choose the data value for your trigger comparison. This works in conjunction with the When softkey. The range of the data value is 0x00 to 0xff. Parity error: The oscilloscope triggers when the parity check is error when there is parity check. Com error: The oscilloscope triggers when the received data is error. For example1, baud: 19200; Parity: No; Data Bit: 8; We set: Idle: High; baud: 19200; when: “Start”

For example2, baud: 19200; Parity: No; Data Bit: 8; We set: Idle: High; baud: 19200; when: “Stop”

Digital Storage Oscilloscope 32

For example3, baud: 19200; Parity: No; Data Bit: 8; Data: 0x55 We set: Idle: High; baud: 19200; Data: 0x55; When: Spec Data; When: equal(=)

Digital Storage Oscilloscope 33

2.8.1.10 LIN Triggering

LIN triggering can trigger on the rising edge at the Sync Break exit of the LIN single-wire bus signal (that marks the beginning of the message frame), the Frame ID, or the Frame ID and Data. A LIN signal message frame is shown below:

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system function menu.

2. Press the Type softkey, then turn the Universal Knob to select LIN and push down the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the trigger source.

4. Set the Baud Rate.

5. Set the Idle Level.

6. Set the Identifier. The range is from 0 to 0x3f.

7. Press When softkey to set trigger condition.

• Internal Field — The oscilloscope triggers when a start bit occurs

• Interval Field - The oscilloscope triggers when the interval field end.

• Sync Field –The oscilloscope triggers when the synchronous field end.

• Id Field –The oscilloscope triggers when the Id field end.

• Sync Id Error - The oscilloscope triggers when the Synchronization ID ERROR

end.

• Identifier (Frame ID) - The oscilloscope triggers when a frame with an ID equal to the selected value is detected. Use the Universal Knob to select the value for the Frame ID.

• ID and Data (Frame ID and Data) - The oscilloscope triggers when a frame with an ID and data equal to the selected values is detected. Use the Universal Knob to select the value for the ID and Data.

Data Index: Set the data index, the range is from 0 to 3. Note: When DataMask is ON, the setting data is invalid.

Digital Storage Oscilloscope 34

2.8.1.11 CAN Triggering

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system function menu.

2. Press the Type softkey, then turn the Universal Knob to select CAN and push down the knob to confirm.

3. Press the Source softkey, turn the Universal Knob to select CH1~CH4 as the trigger source.

4. Set the Baud Rate.

5. Set the Idle Level.

6. Set the Identifier.

7. Press When softkey to set trigger condition.

• Start - The oscilloscope triggers at the start of a frame.

• Remote ID- The oscilloscope triggers on remote frames with the specified ID.

a. Press the Identifier softkey to select the ID number. b. Press the Identifier softkey to move the current bit, and turn the universal to

select the byte to be set.

• Data ID - The oscilloscope will trigger on data frames matching the specified ID

Digital Storage Oscilloscope 35

Note: The Identifier means Remote Id and Data ID.

• Remote Data - The oscilloscope will trigger on data frames matching the specified remote data.

a. Press the Data softkey to select the ID number. b. Press the Data softkey to move the current bit, and turn the universal to select the byte to be set.

• Data Frame data –The oscilloscope will trigger on data frames matching the specified data frame data.

• Error –The oscilloscope will trigger on error frames matching the specified data.

• All Error - The oscilloscope will trigger when any form error or active error is

encountered.

• Ack Error –The oscilloscope will trigger when the comfirm is high.

• Overload Frame - The oscilloscope will trigger on overload frames.

Data Index: Set the data index, the range is from 0 to 3. Note: When DataMask is ON, the setting data is invalid.

Source: CH1; Baund Rate: 1000000; Idle Level: Low; Identifier:0x12efabcd;

Digital Storage Oscilloscope 36

2.8.1.12 SPI Triggering

In SPI trigger, when timeout condition is satisfied, the oscilloscope triggers when the specified data is found. When using SPI trigger, you need to specify the SCL clock sources and SDA data sources. Below is the sequential chart of SPI bus.

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system function menu.

2. Press the Type softkey, then turn the Universal Knob to select SPI and push down the knob to confirm.

3. Source Selection: Press SCL and SDA softkey to specify the data sources of SCL and SDA respectively. They can be set to CH1-CH4. Note: Select channel with signal input as trigger source to obtain stable trigger.

4. Data Line Setting: Width to set the number of bits of the serial data character string. The

serial data string can be specified to be from 4, 8, 16, 24, 32 bits long. Press Data to set the value of the current bit from 0 to f.

Data Mask: 0-Mask, f-No Mask, 1~e mask some data.

5. Trigger Condition: Press Timeout softkey to set the timeout, the range is from 8 ns

to 10 s. Timeout: the clock (SCL) signal need to maintain a certain idle time before the oscilloscope searches for a trigger. The oscilloscope will trigger on when the data (SDA) satisfying the trigger conditions is found.

6. Slope: Clock Edge: Press Slope softkey to select the desired clock edge.

Rising: sample the SDA data on the rising edge of the clock. Falling: sample the SDA data on the falling edge of the clock.

7. When select SCL channel, press SCL and use TRIGGER LEVEL knob to modify the

trigger level of the SCL channel. When select SDA channel, use TRIGGER LEVEL

Digital Storage Oscilloscope 37

knob to modify the trigger level of the SDA channel.

2.8.1.13 IIC Trigger

IIC (Inter-IC bus) signals setup consists of connecting the oscilloscope to the serial data (SDA) line and the serial clock (SCL) line and then specifying the input signal threshold voltage levels. To set up the oscilloscope to capture IIC signals, please refer to the following:

1. Press the [TRIG MENU] button on the front panel to enter the TRIGGER system

function menu.

2. Press the Type softkey, then turn the Universal Knob to select IIC and push down

the knob to confirm.

3. Source Selection: Press SCL and SDA softkey, , turn the Universal Knob to to

specify the data sources of SCL and SDA respectively. They can be set to CH1-CH4.

4. Press When softkey to set trigger condition. Select trigger condition “Start Bit”,

connect the SCL signal to CH1 and connect the SDA signal to CH2.

Press the corresponding Level softkey; then, turn the Trigger Level knob to set the

signal threshold voltage level.

• Data must be stable during the entire high clock cycle or it will be interpreted as a start or stop condition (data transitioning while the clock is high).

Digital Storage Oscilloscope 38

Trigger condition: Trigger Condition: Press When softkey to select the desired trigger condition.

• Start: trigger when SDA data transitions from high level to low level while SCL is

high level.

• Stop: trigger when SDA data transitions from low level to high level while SCL is

high level.

• MissedACK: trigger when the SDA data is high level during any acknowledgement

of SCL clock position.

• Address: the trigger searches for the specified address value. When this event

occurs, the oscilloscope will trigger on the read/write bit. After this trigger condition is selected:

• --The AddrBits is "7 bits"; --so the range can be from 0 to 0x7F.

• Restart: trigger when another start condition occurs before a stop condition.

• Data: the trigger searches for the specified data value on the data line (SDA).

When this event occurs, the oscilloscope will trigger on the clock line (SCL) transition edge of the last bit of data. After this trigger condition is selected:

--press Data softkey to select the desired data bit; Data Index: Set the data index, the range is from 0 to 3. Note: When DataMask is ON, the setting data is invalid.

Trigger Level:

5. When select SCL channel, press SCL and use TRIGGER LEVEL knob to modify the trigger level of the SCL channel. When select SDA channel, use TRIGGER LEVEL knob to modify the trigger level of the SDA channel.

Digital Storage Oscilloscope 39

Trigger Level

Indicates Trigger Points

Holdoff

Acquisition Interval

2.8.2 Holdoff

Holdoff: To use Trigger Holdoff, push the HORIZONTAL Menu button and set the

Holdoff Time option by pressing F4. The Trigger Holdoff function can be used to generate a stable display of complex waveforms (such as pulse trains). Holdoff is the time between when the oscilloscope detects one trigger and when it is ready to detect another. During the holdoff time, the oscilloscope will not trigger. For a pulse train, the holdoff time can be adjusted to let the oscilloscope trigger only on the first pulse in the train.

2.9 SAVE/RECALL

Oscilloscope setups, waveforms, Ref, and CSV files can be saved to internal oscilloscope memory or to a USB storage device. The saved setups, waveforms and Ref can be recalled from an USB Host interface on the front panel to connect an USB device for external storage.

The scope supports setups, waveforms, Ref and CSV files storage. The default save type is setups.

1. Setups

It‘s the default storage type of the scope. It saves the settings of the oscilloscope in internal or external memory in “.SET” format. At most 9 setting files (from No.1～No.9) can be stored in internal memory. The stored settings can be recalled.

2. Wave(Binary)

Digital Storage Oscilloscope 40

The scope saves the waveform data in memory in “.lwf format.

3. Reference

The scope saves the waveform data in memory in “.REF” format. At recall, the reference waveform will be displayed on the screen directly.

4. CSV

It saves the waveform data in external memory in “.CSV” format. The stored files contain the waveform data of the displayed analog channels and the main setting information of the oscilloscope. The recall of CSV file is not supported. Set the save type to CSV, and set the Para Save option to On or Off to turn on or of the parameters storage function.

Internal Save and Recall

Internal save and recall support Setups in Save/Recall. In the following part, the save and recall method and procedures are introduced.

Save the specified oscilloscope setting in internal memory.

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

2. Press [Save/Recall] button on the front panel to enter the SAVE/RECALL function menu.

3. Press the Save softkey and then turn the Universal Knob to select Setup and then press the knob to confirm.

4. Press the Save To softkey to select Internal to save the current setup of the oscilloscope to the internal memory.

5. Press the SetUp softkey button, then turn the Universal Knob to select the location to save. The internal memory can save as many as 9 setup files, from No.1～No.9.

6. Press the Save softkey to save the current setup to the appointed location. After a few seconds, it will pop-out the message “Save successfully”.

Load the specified type of file in internal memory.

If want to recall the setup after having finished the steps above, please do the following steps: Press the Recall softkey, and then turn the Universal Knob to select the location that you want to recall, press the Recall softkey to recall the setup, and it will pop-out the message “Recall Successfully”.

Digital Storage Oscilloscope 41

External save and recall

Before using external storage and recall, make sure that the USB flash device is connected correctly. External storage supports all the types of files in save, but in recall, CSV are not supported.

Save the specified type of file in the external USB flash device.

1. Press the [Save/Recall] button on the front panel to enter the SAVE/RECALL function menu.

2. Press the Save softkey to select Wave or Setup

4. Use the SaveTo softkey to external location. Press Save softkey and into USB storage interface. File can be stored under the root directory or in a certain folder under the root directory of the USB storage device.

5. Press the Save softkey to save the current waveform to the external USB storage device,

Load the specified type of file in the external USB storage device.

1. Press the [Save/Recall] button on the front panel to enter the SAVE/RECALL function menu.

2. Press the Type softkey to select Wave or Setup

3. Press the Recall softkey to enter the SAVE/RECALL file system.

4. Turn the Universal Knob to select the file to be recalled, press the Recall softkey to recall the waveform or setup.

2.10 MEASURE System

The oscilloscope displays graphs of voltage versus time and can help to measure the displayed waveform. There are several ways to take measurements, using the graticule, the cursors or performing an automatic measurement.

2.10.1 Scale measurement

Graticule: This method allows you to make a quick, visual estimate and take a simple

measurement through the graticule divisions and the scale factor. For example, you can take simple measurements by counting the major and minor

Digital Storage Oscilloscope 42

Options

Settings

Comments

Mode

Manual Track

Select a measurement cursor and display it.

Source

CH1~CH4 MATH

Select a waveform to take the cursor measurement. Use the readouts to show the measurement.

Select Cursor

AX(BX) AXBX AY(BY) AYBY

A selected cursor is highlighted, which can be moved freely. Both cursors can be selected and moved at the same time. The box behind the cursor displays the location of the cursor.

graticule divisions involved and multiplying by the scale factor. If you counted 6 major vertical graticule divisions between the minimum and maximum values of a waveform and knew you had a scale factor of 50mV/division, you could easily calculate your peak-to-peak voltage as follows: 6 divisions x 50mV/division = 300mV.

2.10.2 Cursor measurement

Cursor: This method allows you to take measurements by moving the cursors. Cursors

always appear in pairs and the displayed readouts are just their measured values. There are two kinds of cursors: Amplitude Cursor and Time Cursor. The amplitude cursor appears as a horizontal broken line, measuring the vertical parameters. The time cursor appears as a vertical broken line, measuring the horizontal parameters.

The cursor measurement includes two modes: Manual mode and Tracking mode.

1. Manual mode:

Horizontal cursors or vertical cursors appear in pair to measure time or voltage, and the distance between the cursors can be manually regulated. The signal source should be set as a waveform to be measured before the cursors are used.

2. Tracking mode:

A horizontal cursor is intersected with a vertical cursor to form a cross cursor. The cross cursor is automatically located on the waveform, and the horizontal position of the

cross cursor on the waveform is regulated by selecting “Cur A” or “Cur B” and rotating

the [UNIVERSAL] knob. The coordinates of the cursor point will be displayed on the screen of the oscilloscope.

Push the CURSOR button to display the Cursor Menu.

Digital Storage Oscilloscope 43

Moving Cursors: Press the key near Select Cursor to select a cursor and turn Universal Knob to move it. Cursors can be moved only when the Cursor Menu is

displayed.

2.10.3 Automatic Measurement

Automatic Measurement: The oscilloscope performs all the calculations automatically

in this mode. As this measurement uses the waveform record points, it is more precise than the graticule and cursor measurements. Automatic measurements show the measurement results by readouts which are periodically updated with the new data acquired by the oscilloscope. Push the MEASURE button to perform auto measurements. There are 32 types of measurements and up to 4 can be displayed at a time. Perform the steps below and select voltage or time parameters to make automatic measurements.

1. Press the [MEASURE] button on the front panel to enter the MEASURE function menu.

2. Press the Source softkey, and then use the Universal Knob to select the desired channel.

3. To select and display measurement parameters. Press the Type softkey, and then turn the Universal Knob to select the desired measurement parameter.

4. Press the Universal Knob to add the measurement parameter, the parameters and value will be shown above the menu, and the statistics status will update.

5. To turn off the statistic function, press the Statistics softkey to select OFF . The measurement display area can display 4 measurement parameters at most, and the measurements will arrange according to the selecting order. If add a sixth measurement parameter, it will delete the first measurement.

Note: If the parameter does not match the measured condition, it will display as “*****”.

To Clear Measurement Parameters

Press the Clear All softkey to clear all the measurement parameters that are displaying on the screen.

Digital Storage Oscilloscope 44

Options

Settings

Comments

Source

CH1~CH4

Select the measure source.

Measurement Type

Frequency

Calculate the waveform frequency by measuring the first cycle.

Period

Calculate the time of the first cycle.

Mean

Calculate the arithmetic mean voltage over the entire waveform.

Pk-Pk

Calculate the absolute difference between the greatest and the smallest peaks of the entire waveform.

CRMS

Calculate the Root Mean Square voltage over the entire waveform.

PRMS

Calculate the actual RMS measurement of the first complete cycle in the waveform.

Min

The most negative peak voltage measured over the entire waveform.

Max

The most positive peak voltage measured over the entire waveform.

Rising

Measure the time between 10% and 90% of the first rising edge of the waveform.

Falling

Measure the time between 90% and 10% of the first falling edge of the waveform.

+ Width

Measure the time between the first rising edge and the next falling edge at the waveform 50% level.

To Make All Measurement

All measurement could measure all parameters of the current measurement source and display the results on the screen. Do the following steps to make all parameters measurement.

1. Press the [MEASURE] button on the front panel to enter the MEASURE function menu.

2. Press the All Measure softkey to select ON.

3. Press the Source softkey to select the measure source (CH1~CH4,MATH, REFA, REFB, REFC, REFD).

Digital Storage Oscilloscope 45

- Width

Measure the time between the first falling edge and the next rising edge at the waveform 50% level.

+ Duty

Measure the first cycle waveform. Positive Duty Cycle is the ratio between positive pulse width and period.

- Duty

Measure the first cycle waveform. Negative Duty Cycle is the ratio between positive pulse width and period.

Base

Measure the highest voltage over the entire waveform.

Top

Measure the lowest voltage over the entire waveform.

Middle

Measure the voltage of the 50% level from base to top.

Amplitude

Voltage between Vtop and Vbase of a waveform.

Overshoot

Defined as (Base - Min)/Amp x 100 %, Measured over the entire waveform.

Preshoot

Defined as (Max - Top)/Amp x 100 %, Measured over the entire waveform.

PMean

Calculate the arithmetic mean voltage over the first cycle in the waveform.

FOVShoot

Defined as (Vmin-Vlow)/Vamp after the waveform falling.

RPREShoot

Defined as (Vmin-Vlow)/Vamp before the waveform falling.

BWidth

The duration of a burst measured over the entire waveform.

Delay 1-2 ↑

The time between the first rising edge of source 1 and the first rising edge of source 2.

Delay 1-2 ↓

The time between the first falling edge of source 1 and the first falling edge of source 2.

LFF

The time between the first falling edge of source 1 and the last falling edge of source 2.

LFR

The time between the first falling edge of source 1 and the last rising edge of source 2.

LRF

The time between the first rising edge of source 1 and the last falling edge of source 2.

LRR

The time between the first rising edge of source 1 and the last rising edge of source 2.

Digital Storage Oscilloscope 46

FFR

The time between the first falling edge of source 1 and the first rising edge of source 2.

FRF

The time between the first rising edge of source 1 and the first falling edge of source 2.

Off

Do not take any measurement.

Taking Measurements: For a single waveform (or a waveform divided among multiple waveforms), up to 8 automatic measurements can be displayed at a time. The waveform channel must stay in an ‘ON’ (displayed) state to facilitate the measurement. The automatic measurement can not be performed on reference or math waveforms, or in XY or Scan mode.

2.11 ACQUIRE

Run Control

Press the [Run/Stop] or [Single] button on the front panel to run or stop the sampling system of the scope. When the [Run/Stop] is green, the oscilloscope is running, that is, acquiring data when trigger conditions are met. To stop acquiring data, press the [Run/Stop] button. When stopped, the last acquired waveform is displayed. When the [Run/Stop] button is red, data acquisition is stopped. Red "Stop" is displayed next to the trademark logo in the status line at the top of the display. To start acquiring data, press [Run/Stop]. To capture and display a single acquisition (whether the oscilloscope is running or stopped), press Single. The Single run control lets you view single-shot events without subsequent waveform data overwriting the display. Use Single when you want maximum memory depth for pan and zoom. When [SINGLE SEQ] is pressed the display is cleared, the trigger mode is temporarily set to Normal (to keep the oscilloscope from auto-triggering immediately), the trigger circuitry is armed, the Single key is illuminated, and the oscilloscope waits until a user defined trigger condition occurs before it displays a waveform. When the oscilloscope triggers, the single acquisition is displayed and the oscilloscope is stopped (the [Run/Stop] button is illuminated in red). Press [SINGLE SEQ] button

Digital Storage Oscilloscope 47

again to acquire another waveform.

When you acquire an analog signal, the oscilloscope will convert it into a digital one. There are two kinds of acquisition: Real-time acquisition and Equivalent acquisition. The real-time acquisition has three modes: Normal, Peak Detect, and Average. The acquisition rate is affected by the setting of time base. Normal: In this acquisition mode, the oscilloscope samples the signal in evenly spaced intervals to establish the waveform. This mode accurately represents signals in most time. However, it does not acquire rapid variations in the analog signal that may occur between two samples, which can result in aliasing and may cause narrow pulses to be missed. In such cases, you should use the Peak Detect mode to acquire data. Peak Detect: In this acquisition mode, the oscilloscope gets the maximum and minimum values of the input signal over each sample interval and uses these values to display the waveform. In this way, the oscilloscope can acquire and display those narrow pulses that may have otherwise been missed in Normal mode. However, noise will appear to be higher in this mode. Average: In this acquisition mode, the oscilloscope acquires several waveforms, averages them, and displays the resulting waveform. You can use this mode to reduce random noise. Equivalent Acquisition: This kind of acquisition can be utilized for periodic signals. In case the acquisition rate is too low when using the real-time acquisition, the oscilloscope will use a fixed rate to acquire data with a stationary tiny delay after each acquisition of a frame of data. After repeating this acquisition for N times, the oscilloscope will arrange the acquired N frames of data by time to make up a new frame of data. Then the waveform can be recovered. The number of times N is related to the equivalent acquisition rate. Time Base: The oscilloscope digitizes waveforms by acquiring the value of an input signal at discrete points. The time base helps to control how often the values are digitized. Use the SEC/DIV knob to adjust the time base to a horizontal scale that suits your purpose. Push the uTILITY button and press Acquire softkey to set the acquisition parameter.

Digital Storage Oscilloscope 48

Options

Settings

Comments

Mode

(Real Time)

Normal Peak Detect Average HR

Acquire and accurately display most waveforms. Detect glitches and eliminate the possibility of aliasing. Reduce random or uncorrelated noise in signal display. The number of averages is selectable.

Disp Mode

YT XY

YT format shows the vertical voltage in relation to time (horizontal scale); XY format displays a dot between CH1 and CH2 each time when a sample is acquired, where the voltage or current of CH1 determines the X coordinate of the dot (horizontal) and the voltage or current of CH2 determines the Y coordinate (vertical). For detailed information, refer to descriptions on XY format in the following text.

Averages

4, 8, 16, 32, 64, 128

Select the number of averages by pressing F3 or F4.

Memory

Depth

Select the memory depth for different board models.

Sample Points

Normal Acquisition Intervals

8 3 7 2 4 5 6 1 9

Normal Mode Acquires a Single Sample Point in Each Interval

Normal: For the oscilloscope model with the bandwidth of 100MHz, the maximum sample rate is 1GS/s. For time base with insufficient sample rate, you may use the Sine Interpolation Algorithm to interpolate points between sampled points to produce a complete waveform record (4K by default).

Digital Storage Oscilloscope 49

First Acquisition

Second Acquisition

Third Acquisition

Fourth Acquisition

Input repeated signals

Peak Detect: Use this mode to detect glitches within 10ns and to limit the possibility of

aliasing. This mode is valid at the SEC/DIV setting of 4µs/div or slower. Once you set the SEC/DIV setting to 4µs/div or faster, the acquisition mode will change to Normal because the sample rate is fast enough that Peak Detect is unnecessary. The oscilloscope does not display a message to tell you that the mode has been changed to Normal. Average: Use this mode to reduce random or uncorrelated noise in the signal to be displayed. Acquire data in Normal mode and then average a great number of waveforms. Choose the number of acquisitions (4, 16, 64 or 128) to average for the waveform. Stopping the Acquisition: When you are running the acquisition, the waveform display is live. Stop the acquisition (press the RUN/STOP button) to freeze the display. In either mode, the waveform display can be scaled or positioned by vertical and horizontal controls. Equivalent Acquisition: Just repeat the Normal acquisition. Use this mode to take a specific observation on repeatedly displayed periodic signals. You can get a resolution of 40ps, i.e. 25GSa/s sample rate, which is much higher than that obtained in real-time acquisition.

The acquisition principle is as follows.

As shown above, acquire input signals (cycle repeatable) for more than once at a slow sample rate, arrange the sample points by the time they appear, then recover waveforms.

Digital Storage Oscilloscope 50

Options

Settings

Comments

Type

Vectors Dots

Vectors fill up the space between adjacent sample points in the display; Dots only displays the sample points.

Persistency

OFF 1S-30S selectable Infinite

Sets the time length to display each displayed sample point.

Contrast

Adjustable, Turn the multi-functional knob to adjust.

Grid

Dotted line Real line OFF

Off only displays the horizontal and vertical coordinates at the center graticule on the screen.

Grid Intensity

Adjustable, Turn the multi-functional knob to adjust.

Wave Intensity

Adjustable, Turn the multi-functional knob to adjust.

2.12 DISPLAY

The waveform display is affected by settings of the oscilloscope. A waveform can be measured once it is captured. The different styles to display a waveform on the screen give significant information about it. There are two modes to display waveforms Single-window and Dual-window. Refer to

Horizontal Controls for more information.

Push the DISPLAY button and the following menu appears.

2.12.1 XY Format

The XY format is used to analyze phase differences, such as those represented by Lissajous patterns. The format plots the voltage on CH1 against the voltage on CH2, where CH1 is the horizontal axis and CH2 is the vertical axis. The oscilloscope uses the untriggered Normal acquisition mode and displays data as dots. The sampling rate is fixed at 1 MS/s. The oscilloscope can acquire waveforms in YT format at any sampling rate. You may view the same waveform in XY format. To perform this operation, stop the acquisition and change the display format to XY.

Digital Storage Oscilloscope 51

Options

Comments

Language

Set the language

DVM

Enable the DVM measure function.

Acquire

Enter acquire function.

System Info

Display the software and hardware versions, serial number and some other information about the oscilloscope.

System Set

Set the sound, Network, time and date.

Update

Insert a USB disk with upgrade program. Press the Update Program button and the Software Upgrade dialog pops up. Refer to tips to upgrade or cancel.

Calibrate

Press this option and the Self Calibration dialog pops up. Refer to tips to perform the self calibration or cancel.

Self Test

Pass/Fail

Pass/Fail function

Key Record

Front Panel Self Test

2.13 UTILITY System

Push the UTILITY button to display the Utility Menu as follows.

Self Calibration: The self calibration routine can optimize the precision of the

oscilloscope to fit the ambient temperature. To maximize the precision, you should perform the self calibration once the ambient temperature changes by 5℃ or more. Follow the instructions on the screen.

Tip: Press any menu button on the front panel to remove the status display and enter a corresponding menu.

2.13.1 51BFirmware Update

This series of oscilloscope can upgrade the software by the USB flash disc, which

Digital Storage Oscilloscope 52

Option

Setup

Description

Enable Test

ON OFF

Run the pass/fail function. Stop the pass/fail function.

Source

CH1~CH4

Select the signal input channel.

Operation

Run Stop

Run pass/fail Stop pass/fail

Display information

OFF ON

Close waveform pass/fail time display information. Open waveform pass/fail time display information.

needs about 5 minutes. The firmware is upgraded by the following steps:

1. Plug the USB flash disc in which a firmware program is saved in USB Host interface on the front panel of the oscilloscope.

2. Press [UTILITY] to skip to the “UTILITY” menu.

3. Press “Update Firmware”.

4. Select the file and refer to Upgrade dialog to upgrade.

Reboot the machine after finishing upgrading, and the software version is upgraded. The oscilloscope should be self-corrected once after upgrading.

2.13.2 52BSelf Calibration

The self calibration routine helps optimize the oscilloscope signal path for maximum measurement accuracy. You can run the routine at any time but should always run it if the ambient temperature changes by 5℃ or more. For a more accurate calibration, please power on the oscilloscope and wait for 20 minutes until it has adequately warmed up. To compensate the signal path, disconnect any probes or cables from the front-panel input connectors. Then, push the UTILITY button, select the Do Self Cal option and follow the directions on the screen.

2.13.3 56BPass/fail

“Pass/fail” is used for judging whether the input signal is in a built rule range and

outputting the past or failed waveform so as to detect the change condition of the signal. Page 1 of the pass/fail function menu:

Digital Storage Oscilloscope 53

Page 1/2

Skip to page 2 to the pass/fail menu.

Option

Setup

Description

Output

Pass Fail Pass Ring Fail Ring

Output a negative pulse train when the test is passed.

Output a negative pulse train when the test is failed. .

Stop on Output

On Off

Enter STOP state if output exist. Continue to run if output exists.

Rule setup

Skip to a rule setup menu.

Page 2/2

Back to t page 1 to the pass/fail menu

Option

Setup

Description

Vertical

Use the [UNIVERSAL] knob to set a horizontal tolerance range: 0.020div-4.00div。

Horizontal

Use the [UNIVERSAL] knob to set a vertical tolerance range: 0.025div-8.00div。

Operation

Create Save

Create a rule template according to the two setups above. Select a save position for the rule.

Back Back to page 2 of the pass/fail menu.

Option

Setup

Description

Storage

Local Memory USB Flash

Select location of saved rule Location

0-9

Operation

Save Recall

Save the rule setups. Recall the waved rule setups.

Back Back to page of the rule setup menu.

Page 2 of the pass/fail function menu:

Rule setup menu:

Rule save menu:

Digital Storage Oscilloscope 54

Functions

Settings

Acquire Mode

Adjusted to Normal or Peak Detect

Cursor

Off

Display Format

Set to YT

Display Type

Set to Vectors for an FFT spectrum; otherwise, unchanged

Horizontal Position

Adjusted

SEC/DIV

Adjusted

Trigger Coupling

Adjusted to DC, Noise Reject or HF Reject

Trigger Holdoff

Minimum

Trigger Level

Set to 50%

2.14 Fast Action Buttons

AUTOSET: Automatically set the oscilloscope controls to generate a usable display of

the input signals. Refer to the following table for relative content.

SINGLE SEQ: Acquire a single waveform and then stop the acquisition. RUN/STOP: Continuously acquire waveforms or stop the acquisition. HELP: Display the Help menu. DEFAULT SETUP: Recall the factory setup. Refer to the following table for relative

content.

2.14.1 AUTOSET

Autoset is one of the advantages digital oscilloscopes have. When you push the AUTOSET button, the oscilloscope will identify the type of waveform (sine or square wave) and adjust controls according to input signals so that it can accurately display the waveform of the input signal.

Digital Storage Oscilloscope 55

Trigger Mode

Auto

Trigger Source

Adjusted; Autoset can not be used for the EXT TRIG signal

Trigger Slope

Adjusted

Trigger Type

Edge

Trigger Video Sync

Adjusted

Trigger Video Standard

Adjusted Vertical Bandwidth

Full

Vertical Coupling

DC (if GND was chosen before); AC for the video signal; otherwise, unchanged

VOLTS/DIV

Adjusted

Sine Wave Options

Details

Multi-cycle Sine

Display multiple cycles that have appropriate vertical and horizontal scales.

Single-cycle Sine

Set the horizontal scale to display about one cycle of the waveform.

FFT

Convert the input time-domain signal to its frequency components and display the result as a graph of frequency versus amplitude (spectrum). Since it is a math calculation, see Section 5.3.1 Math FFT for more information.

Undo Setup

Let the oscilloscope recall the previous setup.

The Autoset function examines all channels for signals and displays corresponding waveforms. Autoset determines the trigger source according to the following conditions.

 If multiply channels get signals, the oscilloscope will use the channel with

the lowest frequency signal as the trigger source.

 If no signals are found, the oscilloscope will use the lowest-numbered

channel displayed in Autoset as the trigger source.

 If no signals are found and no channels are displayed, the oscilloscope will

display and use Channel 1 as the trigger source. Sine Wave: When you use the Autoset function and the oscilloscope determines that the signal is similar to a sine wave, the oscilloscope displays the following options.

Square Wave or Pulse:

Digital Storage Oscilloscope 56

Square Wave Options

Details

Multi-cycle Square

Display multiple cycles that have appropriate vertical and horizontal scales.

Single-cycle Square

Set the horizontal scale to display about one cycle of the waveform. The oscilloscope displays Min, Mean and Positive Width automatic measurements.

Rising Edge

Display the rising edge.

Falling Edge

Display the falling edge.

Undo Setup

Let the oscilloscope recall the previous setup.

Menu or System

Option, Button or Knob

Default Setting

Acquire

(Three mode options)

Normal

Averages

Run/Stop

Run

Cursor

Type

Off

Source

CH1

Horizontal (amplitude)

±3.2div

Vertical (time)

±4div

Display

Type

Vectors

Persist

Off

Format

Horizontal

Window Mode

Single-window

Trigger Knob

Level

Position

0.00s

When you use the Autoset function and the oscilloscope determines that the signal is similar to a square wave or pulse, the oscilloscope displays the following options.

2.14.2 Default Setup

When you push the DEFAULT SETUP button, the oscilloscope will display the CH1 waveform and remove all the others. When you are at the default setup, press F1 to Undo Preset. Then the oscilloscope returns to the status before default setup. The table below gives the options, buttons and controls that change settings at default setup.

Digital Storage Oscilloscope 57

SEC/DIV

200μs

Math

Operation

—

Source

CH1-CH2

Position

0div

FFT

Vertical Scale

20dB

FFT Operation

Source

CH1

Window

Hanning

FFT Zoom

Measure

Source

CH1

Type

None

Trigger (Edge)

Type

Edge

Source

CH1

Slope

Rising

Mode

Auto

Coupling

Level

0.00v

Trigger (Video)

Polarity

Normal

Sync

All lines

Standard

NTSC

Trigger (Pulse)

When

Set Pulse Width

1.00ms

Polarity

Positive

Mode

Auto

Coupling

Trigger (Slope)

Slope

Rising

Mode

Auto

Coupling

When

Trigger (Alter)

CH1

Type

Edge

Slope

Rising

Digital Storage Oscilloscope 58

Mode

Auto

Coupling

Level

0.00v

CH2

Type

Edge

Slope

Rising

Mode

Auto

Coupling

Level

0.00v

Trigger (OT)

Source

CH1

Polarity

Positive

Mode

Auto

Time

20ns

Vertical System,

All Channels

Coupling

Bandwidth Limit

Unlimited

VOLTS/DIV

Coarse

Probe

Voltage

Voltage Probe Attenuation

10X

Invert

Off

Position

0.00div (0.00V)

VOLTS/DIV

1.00V

The following settings do not change when you push the DEFAULT SETUP button.

 Language Option  Saved Settings  Saved Reference Waveforms  Display Contrast  Calibration Data

Digital Storage Oscilloscope 59

Chapter 3 Waveform Generator

The series oscilloscope is equipped with waveform generator function, with one channel of arbitrary waveform output. User can edit the arbitrary waveform or choose the regular waveforms such as Sine, Ramp, Square, Trapezia, DC, Exponent, AM/FM.

Push the Wave Gen button to display the DDS Menu.

Generate the Sine waveform

To output a Sine Wave, please do the following steps:

1. Press F1 button to select "Sine".

2. Set the Wave Parameter:

Frequency: Set the output wave frequency. Amplitude: Set the output wave amplitude. Offset: Set the output wave vertical level offset.

Generate the Ramp waveform

To output a Ramp Wave, please do the following steps:

1. Press F1 button, then turn the Universal Knob to select "Ramp".

2. Set the Wave Parameter:

Frequency: Set the output wave frequency. Amplitude: Set the output wave amplitude. Offset: Set the output wave vertical level offset.

Generate the Square waveform

To output a Square Wave, please do the following Step:

1. Press F1 button, then turn the Universal Knob to select "Square".

2. Set the Wave Parameter:

Frequency: Set the output wave frequency. Amplitude: Set the output wave amplitude.

Digital Storage Oscilloscope 60

Offset: Set the output wave vertical level offset. Duty: The duty of the output wave.

Generate the Exponent waveform

To output an Exponent Waveform, please do the following steps:

1. Press F1 button, then turn the Universal Knob to select "Exp".

2. Set the Wave Parameters:

Frequency: Set the output wave frequency. Amplitude: Set the output wave amplitude. Offset: Set the output wave vertical level offset.

Digital Storage Oscilloscope 61

Chapter 4 Troubleshooting

4.1 Problem Settlement

1. If the oscilloscope does not start up at power on, follow these steps:

1） Check the power cord to verify it has been connected properly; 2） Check the power on/off button to ensure it has been pushed; 3） Then restart the oscilloscope.

Contact your local HANTEK distributor or directly keep touch with HANTEK Technical Support department if the oscilloscope still can not be turned on normally.

2. If there is no display of waveforms on the screen when the oscilloscope is

turned on, follow these steps:

1） Check the probe to assure its proper connection to the input BNC; 2） Check the channel switch (such as CH1, CH2 menu buttons) to make sure it has

been turned on; 3） Check the input signal to verify it has been connected to the probe correctly; 4） Affirm that all measured circuits have signals to output; 5） Turn up the magnitude for DC signals with large magnitude; 6） In addition, you may press the Auto Measure button to perform an automatic

detection of signals at first.

Contact HANTEK Technical Support department in time if there is still no display of waveforms.

3. If the waveform of the input signal is distorted seriously, follow these steps:

1） Check the probe to assure its proper connection to the channel BNC; 2） Check the probe to assure its good connection to the measured object; 3） Check the probe to verify it has been well calibrated. Otherwise, refer to the

content about calibration described in this manual.

Digital Storage Oscilloscope 62

4. If the waveform is rolling continuously on the screen but can not be

triggered, follow these steps:

1) Check the trigger source to make sure it consistent with the input channel;

2) Check the trigger level to assure its correct adjustment. You may push the

TRIGGER LEVEL knob or press the SET TO 50% button to reset the trigger level

back to the center of the signal;

3) Check the trigger mode to confirm it is a right choice for the input signal. The

default trigger mode is edge trigger. However, it is not suitable for all kinds of input

signals.

Digital Storage Oscilloscope 63

Chapter 5 Services and Support

Thank you for choosing HANTEK. Please contact us through the following ways should you have any inquiry regarding our products. We shall do our best to help you.

1． Contact your local HANTEK distributor;

2． Contact your local HANTEK field office;

3． Contact HANTEK headquarters in China.

Headquarters

Qingdao Hantek Electronic Co., Ltd http://www.hantek.com

Address: 5/F, No.177 Zhuzhou Road (Huite Industry City), Qingdao, China

266101

Tel: +86-532-88703687 / 88703697

Fax: +86-532-88705691 Email: service@hantek.com

Technical Support

Tel: +86-532-88703687 Email: support@hantek.com

Digital Storage Oscilloscope 90

Chapter 6 General Care and Cleaning

6.1 General Care

Do not put or leave the device in a place where the LCD display will be exposed to direct sunlight for long periods of time. Note: To avoid damage to the oscilloscope or probes, do not expose them to sprays, liquids, or solvents.

6.2 Cleaning

Examine the oscilloscope and probes as often as operating conditions require. To clean the exterior surface, perform the following steps: 1） Use a lint-free cloth to remove floating dust on the outside of the oscilloscope and

probes. Take care to avoid scratching the glabrous display filter. 2） Use a soft cloth dampened with water to clean the oscilloscope. For more efficient

cleaning, you may use an aqueous solution of 75% isopropyl alcohol.

Note: To avoid damage to the surface of the oscilloscope or probes, do not use any corrosive or chemical cleaning agents.

Digital Storage Oscilloscope 91

Sample Rate Range

1GS/s

Waveform Interpolation

(sin x)/x

Record Length

Maximum 64K samples per single-channel; maximum 32K samples per dual-channel (4K, 32K optional)

SEC/DIV Range DSO4084 DSO4104

DSO4204 DSO4254

2ns/div to 100s/div, in a 1, 2, 5 sequence

Sample Rate and Delay Time Accuracy

±50ppm

Delta Time Measurement Accuracy (Full Bandwidth)

Single-shot, Normal mode ± (1 sample interval +100ppm × reading + 0.6ns)

>16 averages ± (1 sample interval + 100ppm × reading + 0.4ns)

Sample interval = s/div ÷ 200

Appendix A: Technical Specifications

All specifications herein mentioned apply to the DSO5000 series oscilloscopes. Before checking an oscilloscope from HANTEK to see if it complies with these specifications, make sure it meets the following conditions:

 The oscilloscope must have been operating continuously for twenty minutes

under the specified operating temperature.

 The Do Self Cal operation must be performed through the Utility menu if the

operating temperature changes by more than 5℃.

 The oscilloscope must be within the factory calibration interval.

All specifications are guaranteed unless noted ‘typical’.

Oscilloscope Specifications

Horizontal

Digital Storage Oscilloscope 92

A/D Converter

8-bit resolution, each channel sampled simultaneously

VOLTS/DIV Range

500μV/div to 10V/div at input BNC

Position Range

500μV/div to 20mV/div, ±400mV 50mV/div to 200mV/div, ±2V 500mV/div to 2V/div, ±40V 5V/div to 10V/div, ±50V

Selectable Analog Bandwidth Limit, typical

20MHz

Low Frequency Response (-3db)

≤10Hz at BNC

Rise Time at BNC, typical

DSO4084

DSO4104

DSO4204

DSO4254

≤4.4ns

＜3.5ns

≤1.8ns

<1.4ns

DC Gain Accuracy

±3% for Normal or Average acquisition mode, 10V/div to 10mV/div ±4% for Normal or Average acquisition mode, 5mV/div to 500μV/div

Acquisition Modes

Normal, Peak Detect, Average and HR

Acquisition Rate, typical

Up to 2000 waveforms per second per channel (Normal acquisition mode, no measurement)

Single Sequence

Acquisition Mode

Acquisition Stop Time

Normal, Peak Detect

Upon single acquisition on all channels simultaneously

Average

After N acquisitions on all channels simultaneously, N can be set to 4, 8, 16, 32, 64 or 128

Vertical

Note: Bandwidth reduced to 6MHz when using a 1X probe.

Acquisition

Digital Storage Oscilloscope 93

Mode

Auto, Normal

Level CH1~CH4

±4 divisions from center of screen

EXT

0~3.3V

Holdoff Range

20ns ~ 10s

Trigger Level Accuracy

CH1~CH4

0.2div × volts/div within ±4 divisions from center of screen

EXT

± (6% of setting + 40mV)

Edge Trigger

Slope

Rising, Falling, Rising&Falling

Source

CH1~CH4/EXT

Pulse Width

Polarity

Positive, Negative

Condition(When)

<, >, !=, =

Source

CH1~CH4

Width Range

8ns ~ 10s

Resolution

8ns

Video Trigger

Signal Standard

NTSC, PAL

Source

CH1~CH4

Sync

ScanLine, LinrNum, OddField, EvenField and AllField

Slope Trigger

Slope

Rising, Falling

Condition(When)

<, >, !=, =

Source

CH1 ~ CH4

Time Range

8ns ~ 10s

Resolution

8ns

Overtime Trigger

Source

CH1~CH4

Polarity

Positive, Negative

Time Range

8ns ~ 10s

TTrigger

Digital Storage Oscilloscope 94

Resolution

8ns

Window Trigger

Source

CH1~CH4

Pattern Trigger

Pattern

0: Lower level; 1: High level;

Level

CH1~CH4

Interval Trigger

Slope

Rising, Falling

Condition(When)

<, >, !=, =

Source

CH1~CH4

Time Range

8ns ~ 10s

Resolution

8ns

Under Amp

Polarity

Positive, Negative

Condition(When)

<, >, !=, =

Source

CH1~CH4

Time Range

8ns ~ 10s

Resolution

8ns

UART Trigger

Condition(When)

Start, Stop, Data, Parity Error, COM Error

Source (RX/TX)

CH1~CH4

Data format

Hex

Condition(When)

<, >, !=, =

Data Length

1 byte

Data Bits Width

5 bit, 6 bit, 7 bit, 8 bit

Parity Check

None, Odd, Even

Idle Level

High, Low

Baud Rate(Selectable)

110/300/600/1200/2400/4800/9600/14400/19200/38400/576 00/115200/230400/380400/460400 bit/s

Baud Rate (Custom)

300bit/s~334000bit/s

LIN Trigger

Digital Storage Oscilloscope 95

Condition(When)

Interval Field, Sync Field, Id field, Sync Id Error, Identifier, Id and Data

Source

CH1~CH4

Data format

Hex

Baud Rate (Selectable)

110/300/600/1200/2400/4800/9600/14400/19200/38400/576 00/115200/230400/380400/460400 bit/s

Baud Rate (Custom)

300bit/s~334000bit/s

CAN Trigger

Condition(When)

Start Bit, Remote Frame, Data Frame Id, Frame Id, DataFrame Id A, Error Frame, All Error, Ack Error, Overload Fram

Source

CH1~CH4

Data format

Hex

Baud Rate (Selectable)

10000, 20000, 33300, 500000, 62500, 83300, 100000, 125000, 250000, 500000, 800000, 1000000

Baud Rate (Custom)

5kbit/s~1Mbit/s

SPI Trigger

Condition

Data

Source (CS/CLK/Data)

CH1~CH4 Data format

Hex

Data Length

4, 8, 16, 24, 32

IIC Trigger

Source (SDA/SCL)

CH1~CH4

Data format

Hex

Data Index

0~7

When(Condition)

Start, Stop, No Ack, Address, Data, Restart

Inputs

Input Coupling

DC, AC or GND

Inputs

Digital Storage Oscilloscope 96

Input Impedance, DC coupled

1MΩ±2% in parallel with 20pF±3pF

Probe Attenuation

1X, 10X

Supported Probe Attenuation Factors

1X, 10X, 100X, 1000X

Maximum Input Voltage

Overvoltage Category

Maximum Voltage

CAT I and CAT II

300V

RMS

(10×), Installation

Appendix B: Accessories

All the following accessories are available by contacting your local HANTEK distributor.

Standard Accessories

• Probe×4 (1.5m), 1:1, (10:1) Passive Probes

• A Power line

• A USB Line

• A PC software CD of the oscilloscope

• Warranty Card

• Manufacturer Certificate

• Certificate Of Calibration

Digital Storage Oscilloscope 99

Harmful and poisonous substances or elements 1

Component2

Cr(Vi)

PBB

PBDE

Shell and Chassis

X 0 0 X 0 0 Display Module

X X 0 0 0 0 Circuit Board

X 0 0 X 0 0 Power Supply

X 0 0 X 0

Electric Wire and Cable Assembly

X 0 0 0 0

Connector

X 0 0 X 0

Fastener and Installed Hardware

X 0 X X 0

Other Accessories (including probes)

X 0 0 X 0

Others 0 0 0 0 0 0

Appendix C Harmful and Poisonous

Substances or Elements

‘X’ means that at least the content of this poisonous and harmful substance in a homogeneous material of this component exceeds the limit specified in the SJ/T 11363-2006 standard.

‘0’ indicates that the content of this poisonous and harmful substance in all

homogeneous materials of this component is refrained under the limit stated in the SJ/T 11363-2006 standard. This component list contains components approved in the file ‘Management Measures’.

Digital Storage Oscilloscope 100

VOLTCRAFT DSO4084B, DSO4104B, DSO4204B, DSO4254B, DSO4084C User guide

Specifications and Main Features

Frequently Asked Questions

User Manual

Copyright Declaration

General Safety Summary

Safety Terms and Symbols

Product Scrapping

Brief Introduction to the Series of digital storage oscilloscope

Contents

Chapter 1 Introduction

1.1 General Inspection

1.2 Prepare Instrument for Use

1.3 Accidence of front panel and the user interface

1.3.1 User Interface

1.4 Functional Check

1.4.1 Connect the oscilloscope

1.4.2 Observe the waveform

1.5 Probe Introduction

1.5.1 Safety

1.5.2 Use of Probe Check Wizard

1.5.3 Manual Probe Compensation

1.5.4 Probe Attenuation Setting

Chapter 2 Function Introduction

2.1 Menu and control keys

2.2 Connector

2.3 Default setups

2.4 Multi-functional Knobs and Buttons

2.5 Oscilloscope Setup

2.6 Horizontal Controls

2.6.1 Scan Mode Display (Roll Mode)

2.7 Vertical System

2.7.1 Vertical Controls

2.7.2 Math FFT

2.7.2.1 Setting Time-domain Waveform

2.7.2.2 Displaying FFT Spectrum

2.7.2.3 Selecting FFT Window

2.7.2.4 FFT Aliasing

2.7.2.5 Eliminating Aliases

2.7.2.6 Magnifying and Positioning FFT Spectrum

2.7.2.7 Using Cursors to Measure FFT Spectrum

2.8 Trigger System

2.8.1 Trigger Controls

2.8.1.1 Edge Trigger

2.8.1.2 Pulse Trigger

2.8.1.3 Video Trigger

2.8.1.4 Slope Trigger

2.8.1.5 Overtime Trigger

2.8.1.6 Window Trigger

2.8.1.7 Pattern Trigger

2.8.1.8 Runt Trigger

2.8.1.9 UART Triggering

2.8.1.10 LIN Triggering

2.8.1.11 CAN Triggering

2.8.1.12 SPI Triggering

2.8.1.13 IIC Trigger

2.8.2 Holdoff

2.9 SAVE/RECALL

2.10 MEASURE System

2.10.1 Scale measurement

2.10.2 Cursor measurement

2.10.3 Automatic Measurement

2.11 ACQUIRE

2.12 DISPLAY

2.12.1 XY Format

2.13 UTILITY System

2.13.1 51BFirmware Update

2.13.2 52BSelf Calibration

2.13.3 56BPass/fail

2.14 Fast Action Buttons

2.14.1 AUTOSET

2.14.2 Default Setup

Chapter 3 Waveform Generator

Chapter 4 Troubleshooting

4.1 Problem Settlement

Chapter 5 Services and Support

Chapter 6 General Care and Cleaning

6.1 General Care

6.2 Cleaning

Appendix A: Technical Specifications