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VOLTCRAFT MSO-5062B User guide

MSO-5000B
Mixed Storage Oscilloscope
User Manual
Contents
Contents
1.1 GENERAL SAFETY SUMMARY .................................................................................................................. 1
1.2 SAFETY TERMS AND SYMBOLS ................................................................................................................ 2
1.3 TERMS ON PRODUCT ............................................................................................................................... 2
1.4 SYMBOLS ON PRODUCT ........................................................................................................................... 2
1.5 PRODUCT SCRAPPING .............................................................................................................................. 2
2.1 BRIEF INTRODUCTION TO MSO-5000B ................................................................................................... 3
2.2 HELP SYSTEM .......................................................................................................................................... 3
3.1 INSTALLATION ......................................................................................................................................... 5
3.1.1 Power Supply ............................................................................................................................... 5
3.1.2 Power Cord .................................................................................................................................. 5
3.2 FUNCTIONAL CHECK ............................................................................................................................... 5
3.2.1 Power on the oscilloscope ......................................................................................................... 5
3.2.2 Connect the oscilloscope ........................................................................................................... 5
3.2.3 Observe the waveform ............................................................................................................... 6
3.3 PROBE EXAMINATION .............................................................................................................................. 6
3.3.1 Safety ............................................................................................................................................ 6
3.3.2 Use of Probe Check Wizard ...................................................................................................... 7
3.4 MANUAL PROBE COMPENSATION ............................................................................................................ 7
3.5 PROBE ATTENUATION SETTING ................................................................................................................ 8
3.6 SELF CALIBRATION ................................................................................................................................. 8
3.7 LOGIC ANALYZER FLAT INPUT CABLE ..................................................................................................... 9
4.1 OSCILLOSCOPE SETUP ........................................................................................................................... 10
4.2 TRIGGER ............................................................................................................................................... 10
4.3 DATA ACQUISITION ............................................................................................................................... 12
4.4 WAVEFO RM SCALING AND POSITIONING ............................................................................................... 12
4.5 WAVEFO RM MEASUREMENT .................................................................................................................. 13
5.1 DISPLAY AREA ...................................................................................................................................... 15
5.1.1 XY Format .................................................................................................................................. 17
5.2 HORIZONTAL CONTROLS ....................................................................................................................... 17
MSO-5000B Digital Storage Oscilloscope User Manual i
Contents
5.2.1 Scan Mode Display (Roll Mode) .............................................................................................. 20
5.3 VERTICAL CONTROLS ............................................................................................................................ 20
5.3.1 Math FFT .................................................................................................................................... 22
5.3.1.1 Setting Time-domain W aveform .............................................................................................................. 22
5.3.1.2 Displaying FFT Spectrum ........................................................................................................................ 23
5.3.1.3 Selecting FFT Window ............................................................................................................................ 24
5.3.1.4 FFT Aliasing ............................................................................................................................................ 26
5.3.1.5 Eliminating Aliases .................................................................................................................................. 26
5.3.1.6 Magnifying and Positioning FFT Spectrum ............................................................................................. 26
5.3.1.7 Using Cursors to Measure FFT Spectrum ................................................................................................ 27
5.4 TRIGGER CONTROLS ............................................................................................................................. 27
5.5 MENU AND OPTION BUTTONS ............................................................................................................... 33
5.5.1 SAVE/RECALL .......................................................................................................................... 34
5.5.2 MEASURE .................................................................................................................................. 35
5.5.3 ACQUIRE ................................................................................................................................... 36
5.5.4 UTILITY ....................................................................................................................................... 38
5.5.5 CURSOR .................................................................................................................................... 38
5.5.6 DISPLAY ..................................................................................................................................... 39
5.6 FAST ACTION BUTTONS ......................................................................................................................... 40
5.6.1 AUTOSET ................................................................................................................................... 40
5.6.2 Help ............................................................................................................................................. 41
5.6.3 Default Setup ............................................................................................................................. 42
5.7 MULTI-FUNCTIONAL KNOBS AND BUTTONS .......................................................................................... 44
5.8 SIGNAL CONNECTORS ........................................................................................................................... 44
5.9 LOGIC ANALYZER CHANNELS SETUP .................................................................................................... 45
6.1 EXAMPLE 1: TAKING SIMPLE MEASUREMENTS ..................................................................................... 48
6.2 EXAMPLE 2: TAKING CURSOR MEASUREMENTS .................................................................................... 50
6.3 EXAMPLE 3: ANALYZING INPUT SIGNALS TO ELIMINATE RANDOM NOISE ............................................. 53
6.4 EXAMPLE 4: CAPTURING SINGLE-SHOT SIGNAL .................................................................................... 54
6.5 EXAMPLE 5: USING X-Y MODE ............................................................................................................. 55
6.6 EXAMPLE 6: TRIGGERING ON PULSE WIDTH ......................................................................................... 56
6.7 EXAMPLE 7: TRIGGERING ON VIDEO SIGNAL ........................................................................................ 57
6.8 EXAMPLE 8: USING SLOPE TRIGGER TO CAPTURE PARTICULAR SLOPE SIGNAL .................................... 59
6.9 EXAMPLE 9: USING OVERTIME TRIGGER TO MEASURE LONG PULSE SIGNAL ....................................... 60
6.10 EXAMPLE 10: USING MATH FUNCTIONS TO ANALYZE WAVEF ORM S ...................................................... 61
6.11 EXAMPLE 11: MEASURING DATA PROPAGATION DELAY ........................................................................ 62
6.12 EXAMPLE 12: USING TRIGGER TO MEASURE DIGITAL SIGNAL ................................................................... 63
7.1 PROBLEM SETTLEMENT ......................................................................................................................... 68
8.1 TECHNICAL SPECIFICATIONS ................................................................................................................. 69
MSO-5000B Digital Storage Oscilloscope User Manual ii
Contents
8.2 ACCESSORIES ........................................................................................................................................ 74
8.3 OPEN SOURCE INFORMATION ................................................................................................................ 75
9.1 GENERAL CARE ..................................................................................................................................... 76
9.2 CLEANING ............................................................................................................................................. 76
MSO-5000B Digital Storage Oscilloscope User Manual iii
Copyright Declaration
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 our company.
Our company reserves all rights to modify this document without prior notice. Please contact our
company for the latest version of this document before placing an order.
Our company has made every effort to ensure the accuracy of this document but does not
guarantee the absence of errors. Moreover, our company 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.
MSO-5000B Digital Storage Oscilloscope User Manual iv
Safety Tips
Chapter 1 Safety Tips
1.1 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.
MSO-5000B Digital Storage Oscilloscope User Manual 1
Safety Tips
1.2 Safety Terms and Symbols
The following terms may appear in this manual:
WAR NING . Warning statements point out conditions or practices that could result in injury
or loss of life.
CAUTION. Caution statements identify conditions or practices that could result in damage
to this product or other property.
1.3 Terms on Product
The following terms may appear on the product:
DANGER indicates an injury hazard immediately accessible as you read the marking.
WARNING indicates an injury hazard not immediately accessible as you read the marking.
CAUTION indicates a possible hazard to this product or other property.
1.4 Symbols on Product
The following symbols may appear on the product:
Protective
Ground
(Earth)
Terminal
Mains
Disconnected
OFF (Power)
Measurement
Ground
Terminal
Mains
Connected
ON (Power)
CAUTION
Refer to Manual
High Voltage
Measurement Input Terminal
1.5 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.
MSO-5000B Digital Storage Oscilloscope User Manual 2
Overview
Chapter 2 Overview
2.1 Brief Introduction to MSO-5000B
Model Channels Bandwidth Sample Rate LCD
MSO-5062B 2 60MHz 1GS/s 7 inch color MSO-5102B 2 100MHz 1GS/s 7 inch color
Table 2-1 MSO-5000B main specification
MSO-5000B oscilloscope is with the bandwidth of 60MHz/100MHz, and provides the real-time
and equivalent sample rates respectively up to 1GSa/s and 25GSa/s. In addition, it has maximum
1M memory depth for better observation of the waveform details, and 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.
2.2 Help System
This oscilloscope has a Help system with topics covering all of its features. You can use the Help
system to display several kinds of information:
General information about understanding and using the oscilloscope, such as Using the Menu
System.
Information about specific menus and controls, such as the Vertical Position Control.
Advice to problems you may come across while using an oscilloscope, such as Reducing
Noise.
The Help system provides three methods for you to find the information you want:
context-sensitive, hyperlinks, and an index.
Context-Sensitive
Push the HELP front-panel button and the oscilloscope displays information about the last menu
displayed on the screen. The HELP SCROLL LED lights beside the HORIZONTAL POSITION
knob indicate the alternative function of the knob. If a topic uses more than one page, turn the
MSO-5000B Digital Storage Oscilloscope User Manual 3
Overview
HELP SCROLL knob to move from page to page within the topic.
Hyperlinks
Most of the help topics contain phrases marked with angle brackets, such as <Autoset>. They are
links to other topics. Turn the HELP SCROLL knob to move the highlight from one link to another.
Push the Show Topic option button to display the topic corresponding to the highlighted link. Press
the Back option button to return to the previous topic.
Index
Push the front-panel HELP button, and then press the Index option button. Push the Page Up or
Page Down option button until you find the index page which contains the topic you want to view.
Turn the HELP SCROLL knob to highlight a help topic. Press the Show Topic option button to
display the topic.
NOTE: Press the Exit option button or any menu button to remove the Help text from the screen and return to displaying waveforms.
MSO-5000B Digital Storage Oscilloscope User Manual 4
Getting Started Guide
Chapter 3 Getting Started Guide
3.1 Installation
To keep proper ventilation of the oscilloscope in operation, leave a space of more than 5cm away
from the top and the two sides of the product.
3.1.1 Power Supply
Use a power supply that delivers 90 to 240 V
, 45 to 440 Hz.
RMS
3.1.2 Power Cord
Use only power cords designed for this product. Refer to 8.2 Accessories for specific standards.
3.2 Functional Check
Follow the steps below to perform a quick functional check to your oscilloscope.
3.2.1 Power on the oscilloscope
Plug in the oscilloscope and press the ON/OFF button. Then push the DEFAULT SETUP button.
The default Probe option attenuation setting is 10X.
The Default Setup button
3.2.2 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 ~5V@1KHz.
MSO-5000B Digital Storage Oscilloscope User Manual 5
Getting Started Guide
CH1: to connect with the probe
PROBE COMP
3.2.3 Observe the waveform
Press the AUTOSET button and you should see within a few seconds a square wave of about 5V
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 Channel 2.
3.3 Probe Examination
3.3.1 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.
MSO-5000B Digital Storage Oscilloscope User Manual 6
Getting Started Guide
3.3.2 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:
1） Use the vertical menu (for example, push the CH1 MENU button) to set the Probe option
attenuation factor.
2） Press the PROBE CHECK button to use the Probe Check Wizard and configure the probe
option attenuation factor properly following menu prompts.
3.4 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
~5V@1KHz connector and the reference lead to the PROBE COMP Ground connector.
Display the channel and then press the AUTOSET button.
2. Check the shape of the displayed waveform.
Compensated correctly
Overcompensated
Undercompensated
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.
MSO-5000B Digital Storage Oscilloscope User Manual 7
Getting Started Guide
3.5 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 switch to 10X.
3.6 Self 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.
MSO-5000B Digital Storage Oscilloscope User Manual 8
Getting Started Guide
3.7 Logic Analyzer Flat Input Cable
MSO-5000B series has logic analyzer function, and its logic signal input port is shown as follows:
The flat terminal connection cable is shown as below.
1．Digital Input Terminal
The digital signal input terminals from left to right are GND, D0-D15, GND, totally 18 terminals.
Note: “From left to right” refers to the sequence of the digital input terminals when the flat cable is
connected to the logic signal input port.
2．Flat Cable Plug
Plug the flat cable into the logic signal input port in accordance with the sequence of the input port.
.
MSO-5000B Digital Storage Oscilloscope User Manual 9
Main Feature Description
Chapter 4 Main Feature Description
This chapter provides some general information that you need to learn before using an
oscilloscope. It contains:
1. Oscilloscope setup
2. Trigger
3. Data acquisition
4. Waveform scaling and positioning
5. Waveform measurement
4.1 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 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. To
view the default settings, refer to Section 5.6.3.
4.2 Trigger
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 and CH2). 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
MSO-5000B Digital Storage Oscilloscope User Manual 10
Main Feature Description
g
j
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 Type: The oscilloscope has six types of triggers: Edge, Video, Pulse Width, Slope,
Overtime and Swap.
Edge Trigger uses the analog or digital test circuits for triggering. It happens when the
input trigger source crosses a specified level in a specified direction.
Video Trigger performs a field or line trigger through standard video signals.
Pulse Width Trigger can trigger normal or abnormal pulses that meet trigger conditions.
Slope Trigger uses the rise and fall times on the edge of signal for triggering.
Overtime Trigger happens after the edge of signal reaches the set time.
Swap Trigger, as a feature of analog oscilloscopes, gives stable displays of signals at
two different frequencies. Mainly it uses a specific frequency to switch between two
analog channels CH1 and CH2 so that the channels will generate swap trigger signals
through the trigger circuitry.
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. 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 Coupling: Trigger Coupling determines which part of the signal will be delivered to the
trigger circuit. This can help to obtain a stable display of the waveform. To use trigger coupling,
push the TRIG MENU button, select an Edge or Pulse trigger, and then select a Coupling option.
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.
Trigger level can be
usted vertically
ad
Rising Edge
Trigger slope can be rising or fallin
MSO-5000B Digital Storage Oscilloscope User Manual 11
Falling Edge
Main Feature Description
4.3 Data Acquisition
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.
4.4 Waveform Scaling and Positioning
The display of waveforms on the screen can be changed by adjusting their scale and position.
Once the scale changes, the waveform display will increase or decrease in size. Once the position
changes, the waveform will move up, down, right, or left.
The channel reference indicator (located on the left of the graticule) identifies each waveform on
the screen. It points to the ground level of the waveform record.
Vertical Scale and Position: The vertical position of a waveform can be changed by moving it up
and down on the screen. To compare data, you may align a waveform over another. When you
push the VOLTS/DIV button to change the vertical scale of a waveform, the waveform display will
contract or expand vertically to the ground level.
Horizontal Scale and Position: Pretrigger Information
MSO-5000B Digital Storage Oscilloscope User Manual 12
Main Feature Description
You can adjust the HORIZONTAL POSITION control to view waveform data before the trigger,
after the trigger, or some of each. When you change the horizontal position of a waveform, you are
actually changing the time between the trigger position and the screen center.
For example, if you want to find out the cause of a glitch in your test circuit, you should trigger on
the glitch and make the pretrigger period long enough to capture data before the glitch. Then you
can analyze the pretrigger data and perhaps find the cause. You are allowed to change the
horizontal scale of all the waveforms by turning the SEC/DIV knob. For example, you may want to
see just one cycle of a waveform to measure the overshoot on its rising edge. The oscilloscope
shows the horizontal scale as time per division in the scale readout. Since all active waveforms
use the same time base, the oscilloscope only displays one value for all the active channels.
4.5 Waveform Measurement
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.
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 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.
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 appear as a horizontal broken
line, measuring the vertical parameters. The time cursor appear as a vertical broken line,
measuring the horizontal parameters.
When using cursors, please make sure to set the Source to the waveform that you want to
measure on the screen. To use cursors, push the CURSOR button.
MSO-5000B Digital Storage Oscilloscope User Manual 13
Main Feature Description
Cursor
Cursor
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
MSO-5000B Digital Storage Oscilloscope User Manual 14
Basic Operation
Chapter 5 Basic Operation
The front panel of the oscilloscope is divided into several functional areas. In this chapter we will
give a quick overview of all control buttons and knobs on the front panel as well as the displayed
information on the screen and relative testing operations. The figure below illustrates the front
panel of the MSO-5000B digital oscilloscope.
5.1 Display Area
1 2 3 4 5 6 7 8
19
18
Front Panel of MSO-5000B
9
10 13 12 11 17 16 15 14
MSO-5000B Digital Storage Oscilloscope User Manual 15
1. Display Format:
Basic Operation
: YT
: Vectors
: Gray indicates auto persistence; Green means persistence display is enabled. When
the icon is set to green, the time for persistence display will be shown behind it.
2. Acquisition Mode: Normal, Peak Detect or Average
3. Trigger Status:
The oscilloscope is acquiring pretriggered data.
All pretriggered data have been acquired and the oscilloscope is ready to accept a trigger.
T The oscilloscope has detected a trigger and is acquiring the posttrigger information.
The oscilloscope works in auto mode and is acquiring waveforms in the absence of
triggers.
The oscilloscope is acquiring and displaying waveform data continuously in scan mode.
● The oscilloscope has stopped acquiring waveform data.
: XY
: Dots
S The oscilloscope has finished a single sequence acquisition.
4. Tool Icon:
: If this icon lights up, it means the keyboard of the oscilloscope is locked by the host computer
via USB control.
: If this icon lights up, it means the USB disk has been connected.
: This icon lights up only when the USB slave interface is connected with the computer.
5. Readout shows main time base setting.
6. Main Time Base Window
7. Display of window’s position in data memory and data length.
8. Window Time Base
9. Operating Menu shows different information for different function keys.
10. Readout shows frequency count.
11. Readout points out horizontal waveform position
12. Trigger Type:
:
Edge trigger on the rising edge.
: Edge trigger on the falling edge.
: Video trigger with line synchronization.
MSO-5000B Digital Storage Oscilloscope User Manual 16
Basic Operation
: Video trigger with field synchronization.
: Pulse Width trigger, positive polarity.
: Pulse Width trigger, negative polarity.
13. Pop-up Prompt
14. Readout tells trigger level.
15. Icon indicates whether the waveform is inverted or not.
16. 20M Bandwidth Limit. If this icon lights up, it means the bandwidth limit is enabled, otherwise
disabled.
17. Icon indicates channel coupling.
18. Channel Marker
19. Window displays waveform.
5.1.1 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.
The table below shows how to operate some controls in XY format.
Controls Usable or not in XY format
CH1 VOLTS/DIV and VERTICAL POSITION controls Set the horizontal scale and position
CH2 VOLTS/DIV and VERTICAL POSITION controls
Reference or Math Unusable
Cursors Unusable
Autoset (display format reset to YT) Unusable
Time base controls Unusable
Trigger controls Unusable
Continuously set the vertical scale and
position
5.2 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
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Basic Operation
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.
2. Each option in HORIZ MENU is described as follows.
Options Settings Comments
Window Control Major Window
Minor Window
Selects the major or minor window in dual-window
mode. The window is highlighted once selected.
Press this option button in single-window mode to
enter the daul-window mode.
Mark Right arrow
Left arrow
Set/Clear
Clear All
This function is usable only in dual-window mode. It
sets marks at some waveform record locations that
users are interested in, and searches for these marks
by right and left arrows. Then it positions the window
to this mark for further observation.
Holdoff None Select this menu and turn the multi-functional knob to
adjust the trigger holdoff time within the range of
100ns-10s. Select this menu and push the
multi-functional knob to reset the holdoff time with the
starting value 100ns.
Autoplay None This function is usable in dual-window mode. Push
this menu button and auto move it from left to right at
a specified speed. In the expanded window will
display corresponding waveforms until it stops once
reaching the rightmost side of the major scan window
Single-window Mode
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Dual-window Mode (Full Screen)
Location of expanded window data in memory
Basic Operation
Major Window
Minor Window
(Expanded Window)
Multi-functional
Knob
3.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:
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Basic Operation
1. For more information of the trigger holdoff, see Section Trigger Controls.
2. In single-window mode, press F0 to hide or show the menus on the right side. The dual-window mode does not support the menu hiding function.
5.2.1 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.
5.3 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.
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. Menu (CH1, CH2): Display vertical menu options; turn on or off the display of channel
waveforms.
Options Settings Comments
DC passes both DC and AC components of the input
DC
Coupling
MSO-5000B Digital Storage Oscilloscope User Manual 20
AC Ground
signal. AC blocks the DC component of the input signal and attenuates signals below 10Hz. Ground disconnects the input signal.
Basic Operation
20MHz Bandwidth Limit
VOLTS/DIV
Probe Attenuation
Invert
Unlimited Limited
Coarse Fine
1X 10X 100X 1000X
Off On
Limits the bandwidth to reduce display noise; filters the signal to eliminate noise and other unnecessary HF components. 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.
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.
Inverts the waveform relative to the reference level.
Ground Coupling
Used to display a zero-volt waveform. Internally, the channel input is connected with a zero-volt
reference 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.
3. 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.
4. MATH MENU: Display the waveform math operations. See the table below for details.
The MATH menu contains source options for all math operations.
Operations Source Options Comments
＋ CH1+CH2 Add Channel 1 to Channel 2.
CH1-CH2
－
CH2-CH1
Subtract the Channel 2 waveform from the Channel 1 waveform. Subtract the Channel 1 waveform from the Channel 2 waveform. Three types of window available for selection: Hanning, Flattop, Rectangular.
FFT CH1 or CH2
Zoom: Use the FFT Zoom button to adjust the window size. Scale: x1, x2, x5, x10.
Note: All selected menus are highlighted in orange.
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Basic Operation
5.3.1 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.
5.3.1.1 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.
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;
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Basic Operation
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; 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.
5.3.1.2 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.
Math FFT Options Settings Comments
Source CH1, CH2 Choose a channel to be the FFT source.
Window
FFT Zoom X1, X2, X5, X10
Hanning, Flattop, Rectangular
Select a type of the FFT window. For more information, refer to Section 5.3.1.3. Change the horizontal magnification of the FFT display. For detailed information, refer to Section
5.3.1.6.
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