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DS2072A
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RIGOL DS2072A User manual

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RIGOL
User’s Guide
MSO2000A/DS2000A Series
Digital Oscilloscope
Aug. 2015
RIGOL TECHNOLOGIES, INC.
RIGOL

Guaranty and Declaration

Copyright
© 2013 RIGOL Technologies, Inc. All Rights Reserved.
Trademark Information
RIGOL is a registered trademark of RIGOL Technologies, Inc.
Publication Number
UGA18108-1110
Software Version
00.03.03.SP2 Software upgrade might change or add product features. Please acquire the latest version of the manual from RIGOL website or contact RIGOL to upgrade the software.
Notices
RIGOL products a re covere d by P.R.C. and f oreign pa tents, issue d and pendin g. RIGOL reserves the right to modify or change parts of or all the specifications
and pricing policies at company’s sole decision.
Information in this publication replaces all previously corresponding material. Information in this publication is subject to change without notice. RIGOL shall not be liable for either incidental or consequential losses in
connection with the furnishing, use or performance of this manual as well as any information contained.
Any part of this document is forbidden to be co pie d, phot oc opi ed or rearranged
without prior written approval of RIGOL.
Product Certification
RIGOL guar antees this pr oduct confo rms to the national and industrial standards in China as well as the ISO9001:2008 standard and the ISO14001:2004 standard. Other international standard conformance certification is in progress.
Contact Us
If you have any problem or re quirement when using our products or this manual, please contact RIGOL. E-mail: service@rigol.com Website: www.rigol.com
MSO2000A/DS2000A User’s Guide I
RIGOL

Safety Requirement

General Safety Summary

Please review the following safety precautions carefully before putting the instrument into operation so as to avoid any personal injury or damage to the instrument and any product connected to it. To prevent potential hazards, please follow the instructions specified in this manual to use the instrument properly.
Use Proper Power Cord.
Only the exclusive power cord designed for the instrument and authorized for use within the local country could be used.
Ground the Instrument.
The instrument is grounded through the Protective Earth lead of the power cord. To avoid electric shock, connect the earth terminal of the power cord to the Protect i ve Earth terminal before connecting any input or output terminals.
Connect the Probe Correctly.
If a probe is used, the probe ground lead must be connected to earth ground. Do not connect the ground lead to hi gh volta ge. Im prope r w ay of conne ction could result in dangerous voltages being present on the connectors, controls or other surfaces of the oscilloscope and probes, which will cause potential hazards for operators.
Observe All Terminal Ratings.
To avoid fire or shock hazard, observe all ratings and mark ers on the ins trument and check your manual for more information about ratings before connecting the instrument.
Use Proper Overvoltage Protection.
Ensure that no over voltage (su ch as that cause d by a bolt of lightni ng) can reach the product. Otherwise, the operator might be exposed to the danger of an electric shock.
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Do Not Operate Without Covers.
Do not operate the instrument with covers or panels removed.
Do Not Insert Objects Into the Air Outlet.
Do not insert objects into the air outlet, as doing so may caus e damage to the instrument.
Use Proper Fuse.
Please use the specified fuses.
Avoid Circuit or Wire Exposure.
Do not touch exposed junctions and components when the unit is powered on.
Do Not Operate With Suspected Failures.
If you suspect that any damage may occur to the instrument, have it inspected by RIGOL authorized personnel before further operations. Any maintenance, adjustment or replacement especially to ci rcuits or accessories must be perf ormed by RIGOL authorized personnel.
Provide Adequate Ventilation.
Inadequate ventilation may cause an increase of temperature in the instrument, which would cause damage to the instrument. So please keep the instrument well ventilated and inspect the air outlet and the fan regularly.
Do Not Operate in Wet Conditions.
To avoid short circuit inside the instrument or electric shock, never operate the instrument in a humid environment.
Do Not Operate in an Explosive Atmosphere.
To avoid persona l injuries o r damage to t he instrument, never oper ate the instrument in an explo sive atmosphere.
Keep Instrument Surfaces Clean and Dry.
T o a void dust or moisture from af fecting the pe rformance of the inst rument, keep th e surfaces of the instrument clean and dry.
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Prevent Electrostatic Impact.
Operate the instrument in an electrostat ic discharge protective environ ment to a void damage induced by static discharges. Always ground both the internal and external conductors of cables to release static before making connections.
Use the Battery Properly.
Do not expose the battery (if available) to high temperature or fire. Keep it out of the reach of children. Improper change of a battery (lithium battery) may cause an explosion. Use the RIGOL specified battery only.
Handle with Caution.
Please handle with care during transportation to avoid dam age to keys, knobs, interfaces, and other parts on the panels.
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Hazardous
Safety
Protective
Chassis
Test

Safety Terms and Symbols

Safety Notices in this Manua l:
WARNING
Indicates a potentially hazardous situation or practice which, if not avoided, will result in serious injury or death.
CAUTION
Indicates a potentially hazardous situation or practice which, if not avoided, could result in damage to t he product or loss of important data.
Safety Terms on the Product:
DANGER It calls attention to an operation, if not correctly pe rformed, could
result in injury or hazard immediately.
WARNING It calls attention to an operation, if not correctly pe rformed, could
result in
CAUTION It calls attention to an operation, if not correctly pe rformed, could
result in product.
Safety Symbols on the Product:
potential injury or hazard.
damage to the product or other devices connected to the
Voltage
Warning
Earth Terminal
Ground
Ground
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Allgemeine Sicherheits Informationen

Überprüfen Sie diefolgenden Sicherheitshinweise sorgfältigumPersonenschädenoderSchäden am Gerätundan damit verbundenen weiteren Gerätenzu vermeiden. Zur Vermeidu ng vonGefahren, nutzen Sie bitte das Gerät nur so, wiein diesem Handbuchangegeben.
Um Feuer oder Verletzungen zu vermeiden, verwenden Sie ein ordnungsgemäßes Netzkabel.
Verwenden Sie für dieses Gerät nur das für ihr Land zugelass ene u nd genehm igte Netzkabel.
Erden des Gerätes.
Das Gerät ist durch den Schutzleiter im Netzkabel geerdet. Um Gefahren durch elektrischen Schlag zu vermeiden , ist es unerlässlich, die Er dung durchzufüh ren. Erst dann dürfen weitere Ein- oder Aus gä nge verbunden werden.
Anschluss einesTastkopfes.
Die Erdungsklemmen der Sonden sindauf dem gleichen Spannungspegel des Instruments geerdet. SchließenSie die Erdungsklemmen an keine hohe Spannung an.
Beachten Sie alle Anschlüsse.
Zur Vermeidung von Feuer oder Stromschlag, beachten Sie alle Bemerkungen und Markierungen auf dem Instrument. Bef olgen Sie die Bedienun gsanleitung für weitere Informationen, bevor Sie weitere Anschlüsse an das Instrument legen.
Verwenden Sie einen geeigneten Überspannungsschutz.
Stellen Sie sicher, daß keinerlei Überspannung (wie z.B. durch Gewitter verursacht) das Gerät erreichen kann. Andernfallsbestehtfür den Anwender die GefahreinesStromschlages.
Nicht ohne Abdeckung einschalten.
Betreiben Sie das Gerät nicht mit entfernten Gehäuse-Abdeckungen.
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Betreiben Sie das Gerät nicht geöffnet.
Der Betrieb mit offenen oder entfernten Gehäuseteilen ist nicht zulässig. Nichts in entsprechende Öffnungen stecken (Lüfter z.B.)
Passende Sicherung verwenden.
Setzen Sie nur die spezifikationsgemäßen Sicherungen ein.
Vermeiden Sie ungeschützte Verbindungen.
Berühren Sie keine unisolierten Verbindungen oder Baugruppen, während das Gerät in Betrieb ist.
Betreiben Sie das Gerät nich t i m Fehlerfall.
Wenn Sie am Gerät einen Defekt vermuten, sorgen Sie dafür, bevor Sie das Gerät wieder betreiben, dass eine Untersuchung durch RIGOL autorisiertem Personal durchgeführt wird. Jedwede Wartung, Einstellarbeiten oder Austausch v on Teilen am Gerät, sowie am Zubehör dürfen nur von RIGOL autorisiertem P erso nal durchgeführt werden.
Belüftung sicherstellen.
Unzureichende Belüftung kann zu Temperaturanstiegen und somit zu thermischen Schäden am Gerät führen. Stellen Sie deswegen die Belüftung sicher und kontrollieren regelmäßig Lüfter und Belüftungsöffnungen.
Nicht in feuc h te r Um g ebung betreib en .
Zur Vermeidung von Ku rzschluß im Geräteinne ren und Stroms chlag betreiben Sie da s Gerät bitte niemals in feuchter Umgebung.
Nicht in explosiver Atmosphäre betreiben.
Zur Ve rm e idung von Personen- und Sachschäden ist es unumgänglich, das Gerät ausschließlich fernab jedweder explosiven Atmosphäre zu betreiben.
Geräteoberflächen sauber und trocken halten.
Um den Einfluß von Staub und Feuchtigkeit aus der Luft auszuschließen, halten Sie bitte die Geräteoberflächen sauber und trocken.
Schutz gegen elektrostatische Entladung (ESD).
Sorgen Sie für eine elektrostatisch geschützte Umgebung, um somit Schäden und
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Funktionsstörungen durch ESD zu vermeiden. Erden Sie vor dem Anschluß immer Innen- und Außenleiter der V erbindungsleitung, um st atische Aufladung zu entladen.
Die richtige Verwendung desAkku.
Wenneine Batterieverwendet wird, vermeiden Sie hohe Temperaturen bzw. Feuer ausgesetzt werden. Bewahren Sie es außerhalbder Reichweitevon Kindern auf. Unsachgemäße Änderung derBatteri e (Anmerkung: Lithium-Batterie) kann zu einer Explosion führen. VerwendenSie nur von RIGOL angegebenenAkkus.
Sicherer Transport.
Transportieren Sie das Gerät sorgfältig (Verpackung!), um Schäden an Bedienelementen, Anschlüssen und anderen Teilen zu vermeiden.
VIII MSO2000A/DS2000A User’s Guide
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Sicherheits Begriffe und Symbole

Begriffe in diesem Guide:
WARNING
Die Kennzeichnung WARNING beschreibt Gefahrenquellen die leibliche Schäden oder den Tod von Personen zur Folge haben können.
CAUTION
Die Kennzeichnung Caution (Vorsicht) beschreibt Gefahrenquellen die Schäden am Gerät hervorrufen können.
Begriffe auf dem Produkt:
DANGER weist auf eine Verletzung oder Gefährdung hin, die sofort
geschehen kann.
WARNING weist auf eine V erletzung oder Gefährdung hin , die möglicherweise
nicht sofort geschehen.
CAUTION weist auf eine Verletzung oder Gefährdung hin und bedeutet, dass
eine mögliche Beschädigung des Instruments oder anderer Gegenstände auftreten kann.
Symbole auf dem Produkt:
Gefährliche Spannung
Sicherheits­Hinweis
Schutz-erde Gehäusemasse Erde
MSO2000A/DS2000A User’s Guide
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Measurement Category

Measurement Category
MSO2000A/DS2000A series digital oscillos copes can make measurements in Measurement Category I.
WARNING
This oscilloscope can only be used for measurements within its specified measurement categories.
Measurement Category Definitions
Measurement category I is for measurements performed on circuits not directly connected to MAINS. Examples are me a s urements on circui t s n ot de ri ved from MAINS, and specially protected (internal) MAINS derived circuits. In the latter case, transient stresses are variable; for that reason, the transient withstand capability of the equipment is made known to the user.
Measurement category II is for measurements performed on circuits directly connected to the low volta ge installa tion. Exa mples are measure ments o n househol d appliances, portable tools and similar equipment.
Measurement category III is fo r measure ments perf ormed in the b uilding inst allation. Examples are measurements on distribution boards, circuit-breakers, wir i ng, including cables, bus-bars, junction boxes, switches, socket-outlets in the fixed installation, and equipment for industrial use and some other equipment, for example. Stationary motors with permanent connection to the fixed installation.
Measurement category IV is for measurements performed at the source of the low-voltage installation. Examples are electricity meters and measurements on primary overcurrent protection devices and ripple control units.
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Ventilation Requirement

This oscilloscope uses fan to force cooling. Please make sure that the air intake and exhaust areas are free from obstructions and have free air. When using the oscilloscope in a bench-top or rack setting, provide at least 10 cm clearance beside, above and behind the instrument for adequate ventilation.
WARNING
Inadequate ventilation may cause temperature increase which would damage the instrument. So please keep the instrument well ventilated during operation and inspect the intake and fan regularly.
MSO2000A/DS2000A User’s Guide
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reach the p roduct, or else the ope rat or might expose to dan ger of electri c

Working Environment

Temperature
Operating: 0℃ to +50℃ Non-operating: -40℃ to +70℃
Humidity
0℃ to +30℃: ≤95% relative humidity +30℃ to +40℃: ≤75% relative humidity +40℃ to +50℃: ≤45% relative humidity
WARNING
To avoid short circuit inside the instrument or electric shock, pl ease do not operate in humid environment.
Altitude
Operating: below 3 km Non-operating: below 15 km
Installation (Overvoltage) Category
This product is powered by mains conforming to installation (overvoltage) category II.
WARNING
Make sure that no overvoltage (such as that caused by thunderbolt) can
shock.
Installation (Overvoltage) Cate g ory Definitio n s
Installation (overvoltage) category I refers to signal level which is applicable to equipment measurement terminals connected to the source circuit. In these terminals, precautions are done to limit the transient voltage to the corresponding low level. Installation (overvoltage) cat e gory II refers to the loc al power distribution level which is applicable to equipment connected to the AC line ( A C power).
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Pollution Degree
Degree 2
Pollution Degree Definitions
Pollution degree 1: No pollution or only dry, non-conductive pollution occurs. The pollution has no influence. For example: a clean room or air-conditioned office environment. Pollution degree 2: Normally only dry, non-conductive pollution occurs. Occasionally a temporary conductivity caused by condensation may occur. For example: general indoor environment. Pollution degree 3: Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive due to condensation which is expected. For example: Sheltered outdoor environment. Pollution degree 4: Pollution that generates persistent conductivity through conductive dust, rain, or snow. For example: outdoor locations.
Safety Class
Class 1 – Grounded Product
MSO2000A/DS2000A User’s Guide
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General Care and Cleaning

General Care
Do not store or leave the instrument where it may be exposed to direct sunlight for long periods of time.
Cleaning
Clean the instrument regularly according to its operating conditions. To clean the exterior surface, perform the following steps:
1. Disconnect the instrument from all power sources.
2. Clean the loose dust on th e outside of the i nstrumen t with a lint -free clot h (with a mild detergent or water). When cleaning the LCD, take care to a void sca rifying it.
CAUTION
To avoid damage to the instrument, do not expose it to caustic liquids.
WARNING
To avoid short-circuit and personal injury resulting from moisture, make sure the instrument is completely dry before reconnecting it to power supply.
XIV MSO2000A/DS2000A User’s Guide
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Environmental Consideratio ns

The following symbol indicates that this product complies with the WEEE Directive 2002/96/EC.
Product End-of-Life Handling
The equipment may contain substances that co uld be ha rmful to the environ ment or human health. In order to avoid the release of such substances into the environmen t and harm to human health, we encourage you to recycle this pr o duct in an appropriate system that w ill ensure that most of the mat erials are reused or recy cled appropriately. Please contact your local authorities for disposal or recycling information.
MSO2000A/DS2000A User’s Guide
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MSO2000A/DS2000A Series Overview

MSO2000A is a mixed signal digital oscilloscope aimed at embedded system design and test. It allows users to measure both analog and digital signals. MSO2000A/DS2000A series is a multifunctional and high-performance digita l oscilloscope designed on t he basis of t he Ultra Vision technique developed by RIGOL. It fulfills the design, debugging and test requi remen ts of the mainstream application market.
Main feature s: The unique Ultra Vision technique
Analog channels: 2 GSa/s real-time sample rate; 14 Mpts standard memory
depth and up to 56 Mpt s memory depth (option)
Digital channels: 1 GSa/s real-time sample rate; 14 Mpts memory depth (the
deepest among MSOs of the same class)
50,000 wfms/s (dot s di splay) wav e form capture rate Real-time hardware waveform recording, playback and analysis functions; up to
65000 frames of wa v eform can be recorded; support digital channel waveform recording and playback
256 degree gray scale display
Superb performance
300 MHz, 200 MHz, 100 MHz and 70 MHz analog channel bandwidth 2+16-channel mixed signal digital oscilloscope (MSO2000A) Built-in dual-channel 25 MHz si gnal sourc e (DS2000A-S and MSO2000A-S) Low base noise, 500 μV/div to 10 V/div ultra-wide vertical dynamic range
Various functions
Various trigger functions Various decoding functions Various interfaces: USB Host, USB Device, LAN (LXI), AUX and USB-GPIB
(option)
29 waveform parameters auto measurement (with statistics) Fine delayed sweep function Built-in FFT function Pass/fail test function Wav e form math operation functions
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Support USB st orage device storage and PictBridge printer Conform to LXI-C class instrument standards; enable quick, economic and
efficient creation and reconfiguration of test system
Support remote command control
User-friendly design
8.0 inch WVGA (800*480) 160,000 color TFT LCD, with ultra-wide sc reen, vivid
picture, low power consumption and long service life
Easy to use digital channel grouping and group operation functions Adjustable waveform brig htne ss Auto setting of waveform display (AUTO) Built-in help system Support multiple languages menu, Chinese/English interface and
Chinese/English input
Novel and delicate industrial design and easier operation
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Document Overview

Main Topics of this Manual:
Chapter 1 Quic k Start Introduce the preparations before using the
oscilloscope and provide a basic introduction of the instrument.
Chapter 2 To Set the V ertical System Introduce the vertical system functions of
the oscilloscope. Chapter 3 To Set the Horizontal System Chapter 4 To Set the Sample System Introduce the sample system functions of
Chapter 5 To Trigger the Oscilloscope Introduce th e trig ger mo de, tri gger co upling,
Chapter 6 MATH and Measurements Introduce how to make math operation,
Chapter 7 Digital Channel Introduce how to use the digital channels of
Chapter 8 Protocol Decoding Introduce how to decode the input signal
Chapter 9 Reference Waveform Introduce how to compare the input
Chapte r 10 Pass/Fail Test Introduce how to monitor the input signal
Chapte r 11 Waveform Record Introduce how to record waveform as well as
Chapte r 12 Display Control
Chapte r 13 S ignal Sour ce Introduce how to use the built-in signal
Chapte r 14 S tore and Recall Introduce how to store an d recall the setting
Chapte r 15 System Function Setting Intr o duce how to set the remote interface
Introduce the horizontal system functions of
the oscilloscope.
the oscilloscope.
trigger holdoff, trigger source and various
trigger types of the oscilloscope.
cursor and auto measurements.
the mixed signal digital oscilloscope.
using those common protocols.
waveform with the reference waveform.
using the Pass/Fail test.
how to pl ay back and analyze the recorded
waveform.
Introduce how to control the display of the
oscilloscope.
source.
file, waveform file and so on.
and system-related functions.
XVIII MSO2000A/DS2000A User’s Guide
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Chapte r 16 Remote Control Introduce how to control the oscilloscope
remotely.
Chapte r 17 Troubleshooting Introduce how to deal with common failures
of the oscilloscope.
Chapte r 18 Specifications Provide the specifications and general
specif ications of the oscilloscope.
Chapte r 19 Appendix Provide common information such as options
and accessories.
Format Conventions in this Manual:
1. Key
The key at the front panel is denoted by the forma t of “Key Name (Bold) + T ext Box”. For example, Utility denotes the “Utility” key.
2. Menu Softkey
The menu softkey is denoted by the format of “Menu Word (Bold) + Character Shading”. For example, System denotes the “System” menu softkey under
Utility.
3. Operation Step
The next step of operatio n i s denoted by a n a rrow “”. For example, Utility System denotes pressing Utility at the front panel and then p ressing System.
4. Knob
Label Knob HORIZONTAL SCALE
Horizontal Scale Knob
HORIZONTAL POSITION VERTICAL SCALE VERTICAL POSITION TRIGGER LEVEL
MSO2000A/DS2000A User’s Guide
Horizontal Position Knob Vertical Scale Knob Vertical Position Knob Trigger Level Knob Multifunction Knob
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Content Con v entions in this Man ual:
MSO2000A/DS2000A series includes the following models. Unless otherwise noted, this manual takes MSO2302A-S for an example to illustrate the functions and operation methods of MSO2000A/DS2000A series.
Model
MSO2072A 70 MHz 2 -- 16 MSO2072A-S 70 MHz 2 2 16 MSO2102A 100 MHz 2 -- 16 MSO2102A-S 100 MHz 2 2 16 MSO2202A 200 MHz 2 -- 16 MSO2202A-S 200 MHz 2 2 16 MSO2302A 300 MHz 2 -- 16 MSO2302A-S 300 MHz 2 2 16 DS2072A 70 MHz 2 -- -­DS2072A-S 70 MHz 2 2 -­DS2102A 100 MHz 2 -- -­DS2102A-S 100 MHz 2 2 -­DS2202A 200 MHz 2 -- -­DS2202A-S 200 MHz 2 2 -­DS2302A 300 MHz 2 -- -­DS2302A-S 300 MHz 2 2 --
Analog Bandwidth
Number of Channels
Number of Source Channels
Number of Digital Channels
XX MSO2000A/DS2000A User’s Guide
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Contents
Guaranty and Declaration ......................................................................... I
Safety Requirement ................................................................................ II
General Safety Summary ........................................................................... II
Safety Terms and Symbols ........................................................................ V
Allgemeine Sicherheits Informationen ........................................................ VI
Sicherheits Begriffe und Symbole .............................................................. IX
Measurement Category ............................................................................. X
Ventilation Requirement ........................................................................... XI
Working Enviro nment ............................................................................. XII
General Care and Cleaning ..................................................................... XIV
Environmental Considerations .................................................................. XV
MSO2000A/DS2000A Ser ies Over view ................................................. XVI
Document Overview .......................................................................... XVIII
Chapter 1 Quick Start ............................................................................ 1-1
General Inspection ................................................................................ 1-2
Appearance and Dimensions ................................................................... 1-3
To Prepare the Oscilloscope for Use ......................................................... 1-4
To Adjust the Supporting Legs .......................................................... 1-4
To Connect to Power Supply............................................................. 1-4
Power-on Inspection ....................................................................... 1-5
To Connect the Probe ...................................................................... 1-5
Function Inspection ......................................................................... 1-7
Probe Compensation ....................................................................... 1-8
Front
Panel Overview ............................................................................. 1-9
Rear Panel Overview ............................................................................. 1-11
Front Panel Function Overview............................................................... 1-13
VERTICAL ..................................................................................... 1-13
HORIZONTAL ................................................................................ 1-14
TRIGGER ...................................................................................... 1-15
CLEAR .......................................................................................... 1-16
RUN/STOP .................................................................................... 1-16
SINGLE ......................................................................................... 1-16
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AUTO ........................................................................................... 1-16
Multifunction Knob ......................................................................... 1-17
Navigation Knob ............................................................................ 1-17
Function Keys ................................................................................ 1-18
Signal Source ................................................................................ 1-19
Record .......................................................................................... 1-19
Print ............................................................................................. 1-20
Logic Analyzer ............................................................................... 1-20
User Interface ...................................................................................... 1-21
To Use the Security Lock ....................................................................... 1-26
To Use the Built-in Help System ............................................................. 1-27
Chapter 2 To Set the Vertical System ................................................... 2-1
To Enable the Analog Channel ................................................................. 2-2
Channel Coupling ................................................................................... 2-3
Bandwidth Limit ..................................................................................... 2-3
Probe Ratio ........................................................................................... 2-4
Input Impe da nce ................................................................................... 2-5
Waveform Invert .................................................................................... 2-5
Vertical Scale ......................................................................................... 2-6
Vertical Expansion .................................................................................. 2-7
Amplitude Unit ....................................................................................... 2-7
Channel Label ........................................................................................ 2-7
Delay Calibration of the Analog Channel ................................................... 2-9
Chapter 3 To Set the Horizontal System ............................................... 3-1
Delayed Sweep ...................................................................................... 3-2
Time Base Mode .................................................................................... 3-4
Y-T Mode ........................................................................................ 3-4
X-Y Mode ........................................................................................ 3-4
Roll Mode ....................................................................................... 3-7
Horizontal Scale ..................................................................................... 3-8
Horizontal Reference .............................................................................. 3-9
Chapter 4 To Set the Sample Sy stem .................................................... 4-1
Acquisition Mode .................................................................................... 4-2
Normal ........................................................................................... 4-2
Average .......................................................................................... 4-2
Peak De t ect .................................................................................... 4-4
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High Resolution .............................................................................. 4-4
Sample Mode ........................................................................................ 4-5
Sample Rate ......................................................................................... 4-6
LA Sample Rate ..................................................................................... 4-7
Memory Depth ...................................................................................... 4-8
LA Memory De pth .................................................................................. 4-9
Anti-Aliasing .......................................................................................... 4-9
Chapter 5 To Trigger the Oscilloscope ................................................... 5-1
Trigger Source ...................................................................................... 5-2
Trigger Mode ........................................................................................ 5-3
Trigger Coupling .................................................................................... 5-5
Trigger Holdoff ...................................................................................... 5-6
Noise Rejection ..................................................................................... 5-7
Trigger Type ......................................................................................... 5-8
Edge Trigger ................................................................................... 5-9
Pulse Trigger ................................................................................. 5-11
Runt Trigger .................................................................................. 5-14
Windows Trigger (Option) ............................................................... 5-17
Nth Edge Trigger (Option) ............................................................... 5-19
Slope Trigger ................................................................................. 5-21
Video Trigger (HDTV Option) ........................................................... 5-24
Pattern Trigg er .............................................................................. 5-27
Delay Trigger (Option) .................................................................... 5-29
TimeOut Trigger (Option) ............................................................... 5-32
Duration Trigger (Option)................................................................ 5-34
Setup/Hold Trigger ......................................................................... 5-36
RS232 Trigger ................................................................................ 5-38
I2C Trigger .................................................................................... 5-41
SPI Trigger .................................................................................... 5-44
USB Trigger (Option) ...................................................................... 5-47
CAN Trigger (Option) ...................................................................... 5-49
Trigger Output Connector ...................................................................... 5-53
Chapter 6 MATH and Measurements ..................................................... 6-1
Math Operation ..................................................................................... 6-2
Addition ......................................................................................... 6-2
Subtraction .................................................................................... 6-2
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Multiplication ................................................................................... 6-3
Division .......................................................................................... 6-3
FFT ................................................................................................ 6-5
Digital Filter .................................................................................... 6-8
Logic Operation ............................................................................. 6-10
Advanced Operation ....................................................................... 6-12
MATH Label................................................................................... 6-14
Auto Measurement ............................................................................... 6-15
Quick Measurement after AUTO ...................................................... 6-15
One-key Measurement of 29 Parameters .......................................... 6-17
Frequency Counter Measurement .................................................... 6-23
Measurement Setting ..................................................................... 6-24
To Clear the Measurement .............................................................. 6-26
All Measurement ............................................................................ 6-27
Statistic Function ........................................................................... 6-28
Measurement History ..................................................................... 6-28
Cursor Measurement ............................................................................ 6-29
Manual Mode ................................................................................ 6-30
Track Mode ................................................................................... 6-35
Auto Mode .................................................................................... 6-38
X-Y Mode ...................................................................................... 6-39
Chapter 7 Digital Chann e l ..................................................................... 7-1
To Select the Digital Channel ................................................................... 7-2
To Move the Digital Channel .................................................................... 7-2
To Turn on/off the Digital Channel ........................................................... 7-3
Group Set .............................................................................................. 7-4
To Set the Waveform Display Size ............................................................ 7-5
Reorder Setting ...................................................................................... 7-5
To Set the Threshold .............................................................................. 7-5
To Use the Digital Bus ............................................................................ 7-6
To Set the Label ..................................................................................... 7-7
Digital Channel Delay Calibration ............................................................. 7-8
Chapter 8 Protocol Decoding ................................................................ 8-1
Parallel Decoding ................................................................................... 8-2
RS232 Decodi n g (Option) ....................................................................... 8-5
I2C Decoding (Option) .......................................................................... 8-10
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Contents RIGOL
SPI Decoding (Option) .......................................................................... 8-14
CAN Decoding (Option) ......................................................................... 8-17
Chapter 9 Reference Waveform ............................................................ 9-1
To Enable REF Function.......................................................................... 9-2
To Set the Color .................................................................................... 9-2
To Select REF Source ............................................................................. 9-2
To Save REF Waveform .......................................................................... 9-3
To Adjust REF Waveform Display ............................................................. 9-3
To Export to Internal or External Memory ................................................ 9-3
To Import from Internal or External Memory ............................................ 9-4
Chapter 10 Pass/Fail Test ................................................................... 10-1
To Enable Pass/Fail Test ........................................................................ 10-2
To Select Source................................................................................... 10-2
Mask Range ......................................................................................... 10-2
To S et Test Results Output Type ............................................................. 10-4
To Save the Test Mask .......................................................................... 10-5
To Load the Test Mask .......................................................................... 10-5
Chapter 11 Waveform Record ............................................................. 11-1
Waveform Record ................................................................................. 11-2
Record Constant O n.............................................................................. 11-4
Waveform Playback .............................................................................. 11-6
Waveform Analysis ............................................................................... 11-8
Analysis Based on Trace ............................................................... 11-12
Analysis Based on Pass/Fail Mask................................................... 11-13
Chapter 12 Display Control ................................................................. 12-1
To Select the Display Type ..................................................................... 12-2
To Set the Persistence Time .................................................................. 12-2
To Set the Waveform Intensity ............................................................... 12-4
To Set the Screen Grid .......................................................................... 12-4
To Set the Grid Brightness ..................................................................... 12-4
To Set the Menu Display ........................................................................ 12-4
Chapter 13 Signal Source .................................................................... 13-1
Parameter Setting Method ..................................................................... 13-2
To Output Basic Waveform .................................................................... 13-3
To Output Sine .............................................................................. 13-3
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RIGOL Contents
To Output Square .......................................................................... 13-4
To Output Ramp ............................................................................ 13-5
To Output Pulse ............................................................................. 13-6
To Output DC ................................................................................ 13-6
To Output Noise ............................................................................ 13-7
To Output Built-in Waveform ................................................................. 13-8
To Output Arbitrary Waveform ............................................................. 13-12
To Select Waveform ..................................................................... 13-14
To Create Waveform .................................................................... 13-14
To Edit Waveform ........................................................................ 13-16
Modulation ........................................................................................ 13-19
AM ............................................................................................. 13-19
FM ............................................................................................. 13-21
Chapter 14 Store and Recall ............................................................... 14-1
Storage System .................................................................................... 14-2
Storage Type ....................................................................................... 14-3
Internal Storage and Recall ................................................................... 14-5
External Storage and Recall ................................................................... 14-7
Disk Management ................................................................................ 14-9
To Select File Type ......................................................................... 14-9
To Create a New File or Folder ...................................................... 14-10
To Delete a File or Folder .............................................................. 14-13
To Rename a File or Folder ........................................................... 14-14
To Clear the Local Memory ........................................................... 14-14
Factory.............................................................................................. 14-15
Chapter 15 System Function Setting .................................................. 15-1
Remote Int e rface Configuration ............................................................. 15-2
LAN Setting ................................................................................... 15-2
USB Device ................................................................................... 15-7
GPIB Address ................................................................................ 15-7
System-related .................................................................................... 15-8
Sound .......................................................................................... 15-8
Language ..................................................................................... 15-8
System Information ....................................................................... 15-9
Power-off Recall ............................................................................ 15-9
System Time ............................................................................... 15-10
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Contents RIGOL
Screen ........................................................................................ 15-11
Self-calibration ............................................................................. 15-12
Print Setting ................................................................................ 15-13
Power Status ............................................................................... 15-15
Aux Output ................................................................................. 15-16
Option Management ..................................................................... 15-17
Auto Setting ................................................................................ 15-19
Chapter 16 Remote Control................................................................. 16-1
Remote Control via USB ........................................................................ 16-2
Remote Control via LAN ........................................................................ 16-6
Remote Control via GPIB ....................................................................... 16-8
Chapter 17 Troubleshooting................................................................ 17-1
Chapter 18 Specifications ................................................................... 18-1
Chapter 19 Appendix .......................................................................... 19-1
Appendix A: Accessories and Options ..................................................... 19-1
Append i x B: Warranty ........................................................................... 19-3
Index ....................................................................................................... 1
MSO2000A/DS2000A User’s Guide XXVII
Chapter 1 Quick Start RIGOL

Chapter 1 Quick Start

This chapter introduces the preca utions when using the oscilloscope for the first time, the front/rear panels of th e os cillosc ope , the user interface and the using met hod o f the built-in help system.
The contents of this chapter:
General Inspection Appearance and Dimensions To Prepare the Oscilloscope for Use Front Rear Panel Overview Front Panel Function Overview User Interface To Use the Security Lock To Use the Built-in Help System
Panel Overview
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General Inspection

1. Inspect the shipping container for damage.
Keep the damaged shipping container or cushioning material until the contents of the shipment have been checked for completeness and the instrument has passed both ele ctrical and mechanical tests.
The consigner or carrier shall be liable for the damage to instrument resulting from shipment. RIGOL would not be responsi ble for free maintenance/rework or replacement of the unit.
2. Inspect the instrument.
In case of any damage, or defect, or failure, notify your RIGOL sales representative.
3. Check the Accessories
Please check the accessories according to the packing l is t s. If t he accessories are incomplete o r damaged, please contact your RIGOL sales representative.
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361.6

Appearance and Dimensions

179.6
Figure 1-1 Front View Unit: mm
Figure 1-2 Top Vi ew Unit: mm
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To Prepare the Oscilloscope for Use

To 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.
Figure 1-3 To Adjust the Supporting Legs

To Connect to Power Supply

The power requirements of the oscilloscope are 100-240 V, 45-440 Hz. Please use the power cord supplied with the accessories to connect the oscilloscope to the AC power source. When the oscilloscope is energized, the power key lower-left cor ner of the front panel is in breathing state.
Power Socket
Figure 1-4 To Connect to Power Supply
at the
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Power-on Inspection

When the oscilloscope is energized, pressing the power key corner of the front panel can start the oscilloscope if the power status is currently set to “Default” and the oscillo scope will starts directly if the power status is currently set to “Open”. During the start-up process, the oscilloscope performs a series of self-tests and you can hear the sound of relay switching. After the self-test, the welcome screen is displayed. The inst rument is installed with the trial versions of the options before leavin g fact ory and the time left is about 2000 minutes. The “Installed Options” dialog box will be displayed if your instrument currently installs the trial versions of options. From this dialog box you can view the type, name, edition and time left of each option currently installed.
at the lower-left

To Connect the Probe

RIGOL provides passive probe for the DS2000A series as well as passive probe and logic probe for M SO2000A se ries. For the detailed technical i nformation of the probes, please refer to the User’s Guide of the corresponding probes.
Connect the passive probe:
1. Connect the BNC terminal of the probe to an input terminal of the analog channel of the oscilloscope at the front panel.
2. Connect the g roun d alligat or clip or the ground spring of the probe to the circuit ground terminal and connect the probe tip to the circuit point to be tested.
Figure 1-5 To Connect the Passive Probe
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Connect the logic probe:
1. Connect the single-wire terminal of the logic probe to the [LOGIC D0-D15] digital channel interface at the front panel of MSO2000A in the correct direction.
2. Connect the signal under test to the other terminal of the logic probe. MSO2000A is provided with an RPL2316 logic probe which provides three connecting methods with the signal under test to fulfill the requirements of different application envir onment. F or the details , please refer to the
User’s Guide
.
RPL2316 Logic Probe
Figure 1-6 To Connect the Logic Probe
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o avoid electric shock during the use of probe, please make sure that the

Function Inspection

1. Press Storage Default to restore the oscilloscope to its factory states.
2. Connect the ground alligator clip of the probe to the “Ground Terminal” as shown in the figure below.
3. Use the p r obe to connect the input terminal of CH1 of the oscilloscope and the “Probe Compensation Signal Output Terminal”.
Probe Compensation Signal Output Terminal Ground Terminal
Figure 1-7 Probe Compensation Signal Output Terminal/Ground Terminal
4. Set the attenuation on the probe to 10X. Then press AUTO.
5. Observe the waveform on the di s play. If the waveforms actually shown do not match that in the f i g ure below, please perform “Probe Compensation”.
Figure 1-8 Probe Compensation Signal
6. Use the same method to test the other channels.
WARNING
T insulated wire of the probe is in good condition and do not touch the metallic part of the probe when the probe is connected to high voltage source.
Tip
The probe compensation signal can only be used for probe compensation adjustment and can not be used for calibration.
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Probe Compensation

When the probes are used for the first time or when the probe compensation signal does not match that shown in Figure 8-1, you should compensate the probes to match the input channels of the oscilloscope. Non-compensate d or poorly compensate d probes may cause measurement error. The probe compensation procedures are as follows.
1. Perform steps 1, 2, 3 and 4 of “Functi on Inspection”.
2. Check the displayed waveforms and compare them with the following figures.
Over compensated Perfectly compensated Under compensated
Figure 1-9 Probe Compensation
3. Use a nonmetallic driver to adjust the low-frequency compensation adjustment hole on the probe until the displayed waveform is as the “Perfectly compensated” in the figure above.
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Front Panel Overview

3 4 5 6 7 8 9 10 11 12 1 2
13 14 15 16 17 18 19 20 21 22 23
Figure 1-10 Front Panel Overview
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[2]
Table 1-1 Front Panel Descriptions
No. Description No. Description
1 Measurement Menu Softkeys 13 Power Key 2 LCD 14 USB HOST Interface 3 Logic Analysis Control Key
[1]
15 Digital Channel Input Interface
[1]
4 Multifunction Knob 16 HORIZONTAL Control Area 5 Function Keys 17 Function Menu Softkeys 6 Signal Source
18 VERTICAL Control Are a 7 Navigation Knob 19 Analog Channel Input Area 8
CLEAR 20
Waveform Record&Playback Contr ol Keys
9 AUTO 21 TRIGGER Control Area
10 RUN/STOP 22
11 SINGLE 23
External Trigger Signal Input Terminal
[3]
Probe Compensation Signal Output Terminal and Ground Terminal
12 Help&Print -- --
[1]
Note Note Note
: Only applicable to MSO2000A and MSO2000A-S models mixed signal digital oscilloscopes.
[2]
: Only applicable to MSO2000A-S and DS2000A-S models digital oscilloscopes.
[3]
: The input impedance of this channel is always “HighZ”.
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Rear Panel Overview

1． Handle
Pull up the handle vertically for easy carrying of the instrument. When you do not need the handle, press it down.
2． LAN
Connect the instrument to the network via this interface fo r remote cont rol. This oscilloscope conforms to the LXI-C class instrument standards and you can quickly build test system using it with other instruments.
3． USB DEVICE
PictBridge printer or PC can be connected via this int erf ace to perform the print operation or control the instrument using PC software.
4． Fuse
If a new fuse is required, please use the specified fuse (250V, T2A). T he replacing method is as follows. (1) Turn off the instrument and remove the power cord.
1 2 3
4 5 6 7 8
Figure 1-11 Rear Panel Overview
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(2) Insert a small straight screwdriver into the slot at the power socket and pry
out the fuse seat gently.
(3) Take out the fuse and replace it with a fuse of the specified specification.
Then, reinstall the fuse seat.
5． AC Power Socket
AC power input terminal . T he power requi rement of this os cilloscope is 100-240 V, 45-440 Hz. Use the power cord provided with the accessories to connect the instrument to AC power. Then, you can press t he power ke y at the front panel to start the instrument.
6． Lock Hole
You can lock the instrument to a fixed location using the security lock (please buy it yourself) via the lock hole.
7． Trigger Out and Pass/Fail
Trigger Out
This connector will output a signal that can reflect the current capture rate of the oscilloscope at each trigger. Connect the signal to the waveform display device and measure the frequency of the signal. The measurement result is the same with the current capture rate.
Pass/Fail
During the pass/fail test, the oscilloscope will output a negative pulse via this connector each time a failed wav eform is detected; the oscilloscope will output low level continuou sly via this connector whe n no f ailed w avef orm i s detected.
8． Sourc e Output Connectors
The output terminals of the built-in dual-channel source of the oscilloscope. When Source1 or Source2 is enabled, the signal currently set can be output through the [Source1] or [Source2] connector at the rear panel. This function is only available for MSO2000A-S and DS2000A-S models oscilloscopes.
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Front Panel Function Overview

VERTICAL

CH1, CH2: analog input channels. The 2
channels are marked by different colors whi ch are also used to mark both the corresponding waveforms on the screen and the channel input connectors. Press any key to open t he corresponding channel menu and press again to turn off the channel.
MATH: pre s s th is key to open the math operation menu. You can perf o rm addition, subtraction, multiplication, division, FFT, digital f ilter, logic operations and advanced operations.
REF: press this key to enable the reference waveform function to compare the waveform actually measured with the reference waveform.
VERTICAL
waveform. Turn clockwise to increase the position and turn counterclockwise to decrease. During the modification, the waveform would move up and down and the
POSITION: modify the vertical position of the current channel
position message (e.g. change accordingly. Press down this knob to quickly reset the vertical position to
zero.
VERTICAL
clockwis e to decrease the scale and turn counterclockwise to increase. During the modification, the display amplitude of the wa veform would enlarge o r reduce but the actual amplitude remains unchanged. The scale information (e.g. the lower side of the screen would change accordingly. Press down this knob to quickly switch the vertical scale adjustment modes between “Coarse” and “Fine”.
MSO2000A/DS2000A User’s Guide 1-13
SCALE: modify the vertical scale of the current channel. Turn
) at the lower-left corner of the screen would
) at
RIGOL Chapter 1 Quick Start
Decode1, Decode2: decoding function keys. Press the corresponding key to open the decoding function menu. MSO2000A/DS2000A support par all el decoding and protocol decodings.

HORIZONTAL

MENU: press this key to open the
horizontal control menu under which you can turn on or off the delayed sweep function, switch between differen t ti m e base modes, switch between “Coarse” and “Fine” adjustment of scale as well as modify the horizontal reference setting.
HORIZONTAL
reduce the time base and turn counterclockwise to increase. During the modification, waveforms of all the channels will be displayed in expanded or compressed mode and the time base message (e.g. the screen would change accordingly. Pressing down this knob can quickly turn on or off the delayed sweep function.
HORIZONTAL
would move left or right relative to the center of the s creen when you turn the knob. During the modification, wave forms of all the channels woul d move left or right and the trigger position message (e.g. screen would change accordingly. Pressing down this knob can quickly reset the trigger position (or the delayed sweep position).
SCALE: modify the horizontal time base. Turn clockwise to
) at the upper side of
POSITION: modify the horizontal position. The trigger poin t
) at the upper-right corner of the
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MENU
trigger m ode s , p res s th is k ey t o gene r at e a t ri gge r

TRIGGER

MODE: press this key to switch the trigger mode to Auto, Normal or Single and the corresponding
state backlight of the current trigger mode would be illuminated.
TRIGGER clockwise to increase the level and turn counterclockwise to reduce. During the modification, the trigger level line would move up
or down and the value in the trigger level message box (e.g. ) at the lower-left corner of the screen would change accordingly. Press down the knob to quickly reset the trigger level to zero point.
: press this key to open the trigger operation menu. This oscilloscope
provides various trigger types.
FORCE: in Normal and Single signal forcefully.
LEVEL: modify the trigger level. Turn
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CLEAR

RUN/STOP

SINGLE

Press this key to clear all t he wavef orms on the screen. If the oscilloscope is in the “RUN” state, new waveforms will still be displayed.
Press this key to set the state of the oscilloscope to “RUN” or “STOP”. In the “RUN” state, the key is illuminated in yellow. In the “STOP” state, the key is illuminated in red.
Press this key to set the trigger mode to “Single” and this key is illuminated in or ange. In single tri gger mode, press
FORCE to generate a trigger signal immediately.

AUTO

Press this key to enable the waveform auto setting
1-16 MSO2000A/DS2000A User’s Guide
function. The oscilloscope will automatically adjust the vertical scale, horizontal time base and trigger mode according to the input signal to realize optimum waveform display.
Note: The waveform auto setting function requires that
the frequency of sine should be no lower than 25 Hz. If the parameter exceeds this limit, the waveform auto setting function might be invalid.
Chapter 1 Quick Start RIGOL

Multifunction Knob

Multifunction (the backlight goes on during operation):
In menu operation, press any menu softkey and turn the knob to select the submenus under this menu and then press down the knob to select the current submenu. It can also be used to modify parameters and input filename. In addition, for MSO2000A-S and DS2000A-S models oscilloscopes, when setting the parameters (such as frequency, amplitude etc.) of the built-in signal source, press the corresponding menu softkey and then press the knob; the numeric keyboard will pop-up on the screen and you can select and input the desired value and unit using this knob.
Adjust waveform brightness:
In non-menu-operation mode (menu is hidden), turn t his knob to adjust t he br ightness of waveform. The adjustable range is from 0% to 100%. Turn clockwise to increase the brightness and counterclockwise to reduce. Press down this knob to reset the brightness to 50%. You can also press Display WaveIntensity and use the knob t o adjust the waveform brightness.

Navigation K n ob

This knob can quickly adjust the numerical parameters with relatively large settable range. Turn clockwise (counterclockwise) to increase (reduce) the value. The inner knob is used for fine adjustment and the outer knob for coarse adjustment.
For example, this knob can be used to quickly locate the waveform frame (the Current Frame menu) t o be played back in the waveform playback function. Similar parameters include trigger holdoff, pulse width setting, slope time and etc.
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Acquire
types incl ude t races , wa vef orms, s etups , pictu re an d CSV. The picture can be store d
persistence time, wav e intensity, grid type, grid brightness and menu dis play time of
Besides, some advanced f unctions (such as the pass /fail te st, wa v efo rm record and

Function Keys

Measure: press this key to open the
measurement setting menu. You can set the measurement setting, all measure, statistic function etc. Press MENU at the left of the screen
to open the measurement menus of 29 waveform para meters. Then, press down the corresponding menu softkey to quickly realize o ne -key measurement and the measurement result will be displayed at the bottom of the screen.
: press this key to enter the sample setting menu to set the acquisition
mode, memory d ep t h a n d a n t i -aliasing function of the oscilloscope.
Storage: press this key to enter the file store and recall interfa ce. The storable file
in bmp, png, jpeg or tiff format. Internal and external storage as well as disk management are also supported.
Cursor: press this key to enter the cursor measurement menu. The oscilloscope provides four cursor modes: manual, track, auto and X-Y.
Note: X-Y cursor mode is only available when the h orizontal ti me base is set t o X-Y.
Display: press this key to enter the display setting menu to set the display type,
the waveform.
Utility: press this key to enter the system utility function setting menu to set the system-related functions or parameters, such as the I/O, sound and language.
print setting) are also supported.
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Signal Source

Press this key to enter the source setting interface. You can enable
Note: This function is only available for MSO2000A-S and DS2000A-S mod els
oscilloscopes.
or disable the out put of th e [Source1] or [Source2] connector at the rear panel, set the output signal waveform an d par ameters, turn on or off the state display of the current signal source.

Record

Stop Play/Pause Record
Record: press this key to start recording the waveform. The backlight is illuminated in red and flashes. Besides, when the record constant on (Open) is enabled, the backlight will also be illuminated in red and flashes.
Play/Pause: in the stop or pause state, press this key to play back th e waveform and press again to pause the play. The backlight is illuminated in yellow.
Stop: press this key to stop the waveform being recorded or being play ed bac k. The backlight is illuminated in orange.
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Print

Press this key to execute the print function or save the content displayed in the screen in the USB storage device in a picture file. If a PictBridge printer is currently connected and the printer is in idle state, pressing this key will execute the print function. If no printer but a USB storage device is currently connected, pressin g this key will save the screen content to the US B storage device in “.png” format. You can also press Storage to set the storage type to picture and press Pic Type to store the screen image in the specified picture f ormat ( bmp , pn g, jpe g or tif f). When p rinter and USB storage device are connected at the same time, the printer enjoys higher priority.

Logic Analyzer

Press this key to open the logic analyze r control menu. Y ou can tu rn on or off any channel or channel group, modify the display size of the digital channel waveforms, modify t he logic threshold of th e digital channel as well as group the 16 digital channels and display them as a bus. You can also set a label for each digital channel.
Note: This function is only applicable to the MSO2000A and
MSO2000A-S se ries oscilloscopes.
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12 13 14 15 16 17 18 19 20

User Interface

MSO2000A/DS2000A provides 8.0 inch, WVGA (800*480) 160,000 color TFT LCD. What is worth mentioning is that the 14-grid ultra-wide screen enables you to view “longer” waveform.
1 2 3 4 5 6 7 8 9 10 11
Figure 1-12 User Interface
1. Auto Measurement Items
Provide 16 horizontal (HORIZO NTAL) parameters and 13 vertic a l (VERTICAL) parameters. Press the softkey at the left of the screen to enable the auto measure ment function of the corresponding parameter. Press MENU continuously to switch between the horizontal and vertical parameters.
2. Digita l Ch annel Label and Waveform
The logic high level o f the digital w avef orm is display ed in blue and the logi c low
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waveform on the screen
level in green (correspond to the color of the channel label). Its edge is displayed in white. The label and waveform of the digital channel currently selected are di s pl ayed in red.
Note: This function is only applicable to MSO2000A and MSO2000A-S models
oscilloscopes.
3. Status
Available states include RUN, STOP, T’D (triggered), WAIT an d AUTO.
4. Horizontal Time Base
Represen t the tim e per grid on the horizontal axis on the screen. Use HORIZONTAL
SCALE to modify this parameter. The range available is from 1.000 ns/div to 1.000 ks/div (for 200 MHz bandwidth oscilloscope, the range available is 2.000 ns/div to 1.00 0 ks/div; for 100 MHz and 70 MHz bandwidth oscilloscope, the ra nge av ailable is 5.000 ns/div to 1.000 ks/div).
5. Sample R ate/Memory Depth
Display the current real-time sample rate of the analog channels and
memory depth of the oscilloscope.
The parameter changes with the horizontal time ba se.
6. Waveform Memory
Provide t he schematic diagram of the memory position of the waveform currently on the screen.
waveform in the memory
7. Trigger Position
Display the trigger position of t he waveform i n the waveform memory and on the screen.
8. Horizontal Position
Use HORIZONTAL
POSITION to modify this parameter. Pressing down
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the knob will autom atic al ly set th e parameter to zero.
9. Trigger Type
Display the currently selected trigger type and trigger condition setting. Different labels are displayed when different trigger types are selected. For example:
represents triggering on the rising edge in “Edge” trigger.
10. Trigger Source
Display the trigger source currently selected (CH1, CH2, E X T, AC Line or any channel of D0-D15). Different labels are displayed when different trigger sources are selected and the color of the trigger parameter area will change accordingly. For example,
denote s that CH1 is sel ected as th e trigger source.
11. Trigger Level
When the trigger source is set to CH1 or CH2, the trigger level label
is displayed at the right of th e screen and the trigger lev el value is displayed at the upper-right corner of t h e scre e n. When using TRIGGER
LEVEL to modify the trigger level, the trigger level value will change with the up and down of
.
When the trigger source is EXT, the trigger level value is displayed at the
upper-right corner of the screen. No trigger level label is displayed.
If the trigger source is AC line, no trigger level value and trigger level label
are displayed.
When the trig ger s ource is set to D0 to D15, the trigger level is displa yed at
the upper-right corner of the screen. No trigger level label is displayed.
In Runt trigger, slope tr igg er and wind ows trigger, two trigger level labels
(
and ) are displayed.
12. CH1 Vertical Scale
Display the on/off status of CH1 and the voltage value pe r grid of CH1 waveform vertically. In additio n, the following labels will be displayed according to the current channel setting: channel coupling (e.g. and bandwidth limit (e.g.
). Y ou can use VIRTICAL SCALE to modify this
), input impedance (e.g. )
parameter.
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13. Analog Channel Label/Waveform
Different channels are ma rked with diffe rent colors and the col ors of the channel label and wavefor m are the sa me.
14. CH2 Vertical Scale
Display the on/off status of CH2 and the voltage value per grid of CH2 waveform vertically. In additio n, the following labels will be displayed according to the current channel setting: channel coupling (e.g. and bandwidth limit (e.g.
). You can use VIRTICAL SCALE to modif y this
), input impedance (e.g. )
parameter.
15. Digital Channel Sta t u s Ar e a
Display the current status of the 16 digital channels (D0 to D15 from right to left). The digital channels currently turne d on are displayed in green, the digital channel currently selected is displayed in red and the digital channels currently turned off are displayed in grey.
Note: This function is only applicable to MSO2000A and MSO2000A-S models
oscilloscopes.
16. Messa ge Box
Display the prompt messages.
17. Source1 Waveform
Display the type of the waveform curren t ly selected by Source1. When the impedance of the signal source is set to 50 Ω,
will be
displayed at the right of the Source1 waveform.
When the modulation is enabled,
will be displayed at the right of the
Source1 waveform.
Note: This function is only applicable to MSO2000A-S and DS2000A-S models
oscilloscopes.
18. Source2 Waveform
Display the type of the waveform currentl y selected by Source2. When the impedance of the signal source is set to 50 Ω,
will be
displayed at the right of the Source 2 waveform. When the modulation is enabled,
will be displayed at the right of the
Source2 waveform.
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Chapter 1 Quick Start RIGOL
Note: This function is only applicable to MSO2000A-S and DS2000A-S models
oscilloscopes.
19. Notification Area
Display the system time, sound icon, USB storage device icon and PictBridge printer icon.
System Time
Displayed in “hh:mm (ho ur:minute)” format. When printing or storing the waveform, the output file will contain this time message. Press
Utility System Syst em Time System Time to set through the following format: yyyy-mm-dd hh:mm:ss (year-month-date hour:minute:second)
Sound Icon
When the sound is enabled, will be displayed. Press Utility Sound to enable or disable the sound.
USB Sto r a ge Device Icon
When a USB storage device is detected,
will be displayed.
PictBridge Printer Icon
When a PictBridge printe r is cor rectly connected to the oscillos cope,
will
be displayed in this area.
20. Operation MEN U
Press any softkey to activate the corresponding menu. The following symbols might be displayed in the menu.
Denote that parameter items. The backlight of
at the front panel can be rotated to selec t the
turns on when the parameter selection is valid. Denote that backlight of Denote that press
to input the desired paramrter values directly using the
pop-up numeric keyboard. The backlight of
can be rotated to modify the par ameter values . The
turns on when the parameter input is valid.
can be rotated to modify the parameter values and
turns on when the parameter input is valid. Denote that you can rotate the “Navigation Knob” to quickly adjust/locate parameters. Denote that you can rotate press down
to select the parameter. The bac klight of is
to adjust the parameter and then
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RIGOL Chapter 1 Quick Start
constant on.
Note: The f ollowing direction ke ys might appear in the grid at the l ower-left
corner of the menu bar:
Denote that the current menu has several options. Denote that the current menu has a submenu. Press this key to return to the previous menu.
Denote that you can open the next page of the menu. Denote that you can open the previous page of the menu.

To Use the Security Lock

If needed, you can use the security lock (please buy it yourself ) to lock the oscilloscope to a fixed location. The method is as f ollows, al ign the l ock with the lo ck hole and plug it into the lock hole vertically; turn the key clockwi s e to lock the oscilloscope and then pull the key out.
Security Lock Hole
Figure 1-13 To Use the Security Lock
Note: Please do not insert other articles into the securi ty lock hole to avoid
damaging the instrument.
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To Use the Built-in Help System

The help system of this oscilloscope provides instructions for all the keys and menu softkeys at the front panel. Press Help to open the help interface an d press a gain to close the interface. The help interface mainly consists of two parts. The left is “Help Options” and you can use “Button” or “Index” mode to select the desired help option. The right is “Help Display Area” which displays the corresponding help information.
Help Options Help Display Area
Figure 1-14 Help Interface
Button:
Default mode. In this mode, you can press the button (except the power key and the key select the button name (the it em currentl y selected i s displa yed with brown shadin g) to get the corresponding help information in the “Help Displa y A rea”. Besides, you can acquire the help information of the navigation knob by directly rotating the navigation knob or using and then press the knob to switch to Index mode.
Index:
In this mode, use The item currently selected is displayed with brown shading. Press the knob to get the corresponding help information in the “Help Display Area”. Use
MSO2000A/DS2000A User’s Guide 1-27
to select “To Button” and then press the knob to switch to Button mode.
/ at the right of the screen) or rotate at the front panel to
to select “WaveSearch”. Use to sele c t “To Index”
to select the item that needs to get hel p (f or e xam ple, “BW”).
Chapter 2 To Set the Vertical System RIGOL

Chapter 2 To Set the Vertical System

The contents of this chapter:
To Enable the Analog Channel Channel Coupling Bandwidth Limit Probe Ratio Input Impe da nce Waveform Invert Vertical Scale Vertical Expansion Amplitude Unit Channel Label Delay Calibration of the Analog Channel
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To Enable the Analog Channel

MSO2000A/DS2000A provides 2 analog input channels (CH1 and CH2) and provides independent vertical control system for each channel. As the setting methods of the vertic al systems of the two channels are the same, this chapter takes CH1 as an example to illustrate the setting method of the vertical system.
Connect a signal to the input connector of CH1 and then press CH1 in the vertical control area (VERTICAL) at the front panel to enable CH1.
At this point, the channel setting men u is displaye d at the right si de of the sc reen and the channel status l abel at the bott om of t he s creen (as sh own in the figure bel ow) is highlighted. The information displayed in the channel status label is related to the current channel setting.
After the channel is turned on, modify the parameters such as the vertical scale, horizontal time base and trigger mode according to the input signal to make the waveform display easy t o be observed and measured.
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Channel Coupling

The undesired signals can be filtered out by setting the coupling mode. For example, the signal under test is a square waveform with DC offset. When the coupling mode is “DC”: the DC and AC components can pass the
channel.
When the coupling mode is “AC”: the DC components of the signal under test
are blo cked.
When the coupling mode is “GND”: the DC and AC components of the signal
under test are both blocked.
Press CH1 Coupling and use to select the desired coupling mode (the default is DC). The current coupling mode is displayed in the channel status label at the bottom of the screen as shown in the figures below. You can also press Coupling continuously to switch the coupling mode.
DC AC GND

Bandwidth Limit

Setting the bandwidth limit can reduce the display noise . For example, the signal under test is a pulse with high frequency oscillation. When bandwidth limit is disabled, the high frequency components of the signal
under test can pass the channel.
Enable bandwidth limit and limit the bandwidth to 20 MHz or 100 MHz
high frequency components that exceed 20 MHz or 100 MHz are attenuated.
Press CH1 BW Limit and use to enable or disable bandwidth limit (the default is OFF). Whe n bandwidth limit (20 MHz or 10 0 MHz) is enabled, the chara cter “B” will be display ed in th e channel status label at the bottom of the screen. You can also press BW Limit continuously to switch the bandwidth limit status.
[1]
Note
bandwidth to 100 MHz.
: Only the oscilloscope which analog bandwidth is 200 MHz or 300 MHz can limit the
[1]
, the
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Probe Ratio

You can set the probe attenuation ratio manually. The probe ratio values available are as shown in the table below.
Table 2-1 Probe Attenuation Coefficient
Menu
0.01X
0.02X
0.05X
0.1X
0.2X
0.5X 1X 2X 5X
10X 20X
50X 100X 200X 500X
1000X
(waveform display amplitude : actual waveform amplitude)
Attenuation Coefficient
0.01:1
0.02:1
0.05:1
0.1:1
0.2:1
0.5:1 1:1 2:1 5:1
10:1 20:1
50:1 100:1 200:1 500:1
1000:1
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Input Impedance

This oscilloscope provides two input impedance modes (1 MΩ (default) and 50 Ω) to reduce the ci rcuit load caused by the inte racti on of t he oscilloscope and the circuit t o be tested.
1MΩ: the input impedance of the oscilloscope is rather high and the current
flowing into the oscilloscope from the circuit under test can be ignored.
50Ω: match the oscilloscope with a device with 50 Ω output impedance.
Press CH1 Input to set the input impedance of the oscilloscope. When “50Ω” is selected, “Ω” is displayed in the channel status label at the bottom of the screen.
Note: The setting of the input impedance affects the settable range of the vertical
scale and vertical offset of the corresponding channel. For the details, please ref er to “Specifications”.

Waveform Invert

Press CH1 Invert to turn waveform invert on or off. When waveform invert is turned off, the waveform display is normal; when waveform invert is turned on, the waveform voltage values are inverted (as shown in the figures below).
(a) “Invert” is Off
Figure 2-1 Waveform Invert
(b) “Invert” is On
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Vertical Scale

Vertical scale refers to the voltage value per grid in the vertical direction on the screen and is usually expressed as V/div.
Press CH1 Volts/Div to select the desired adjustment mode of the vertical scale, or press VERTICAL SCALE to switch the adjustment mode quickly. Coarse adjustment: set the vertical scale in 1-2-5 step namely 500 μV/div, 1
mV/div, 2 mV/div, 5 mV/div, 10 mV/div…10 V/div (take counterclockwise as an example).
Fine adjustment: further adjust the vertical scale at a relatively smaller step to
improve the vertical resolution. If the amplitude of th e input waveform is a little bit greater than the full scale under the current scale and the amplitude would be a little bit lower if the next scale is used, fine adjustment can be used to improve the amplitude of waveform display to view signal details.
After the adjustment mode is selected, rotate VERTICAL vertical scale (clockwise to reduce the scale and counterclockwise to increase). The scale information in the channel status label (as shown in the figure below) at the bottom of the screen will change accordingly during the adjustment. The ad justab le range of the vertical scale is related to the probe rati o and input im pedance currently set. By default, the probe ratio is 1X, the in put impedance is 1 MΩ and the adjustable rang e o f the vert ical sc ale is from 500 μV/div to 10 V/div.
SCALE to adj ust the
When adjusting the vertical scale, the waveform will be expanded or compressed around the center of the screen or the ground level of the signal according to the change of the vertical scale.
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Vertical Expansion

When using VERTICAL channel, you can choose to expand or compress the signal vertically around the center of the screen or the ground point of the signal.
Press Utility System VerticalExp to select “Center” or “Ground” and the default is “Ground”. Center: when the vertical scale is modified, the waveform will be expanded or
compressed around the center of the screen.
Ground: when the vertical scale is modified, the waveform will be expanded or
compressed around the ground level.
SCALE to change the vertical scale of the analog

Amplitude Unit

Select the amplitude unit f or the current channel. The a va ilable units a re W, A, V an d U. When the unit is changed, the unit displayed in the channel status label will change ac cordingly. Press CH1 Unit to sele ct the desired unit an d the default is V.

Channel Label

The instrument uses the number of the channel ( channel by default. For ease of use, you can also set a label for ea ch channe l, fo r example,
Note: The user-defined label can include uppercase English letters (from A to Z),
lowercase English letters (from a to z), numbers (from 0 to 9), underline and space; the length of the label cannot exceed 4 characters.
For example, change “ ” to “ ”. Press CH1 Label to enter the label modification interface. Press Keyboard to select the “Keyboard” area. Select “Aa” using down
and press down to switch it to “aA”. Select “C” using and press to input the character. Use the same method to input “hn1”.
.
) to mark the corresponding
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Name Input Area Keyboard Upper/Lower Case Switch
Figure 2-2 Label Modification Interface
After finishing the input, press OK to finish the modification and the channel label will change to “
”.
T o modify or delete the input character, press Name to select the “Name Input Area” and use
to select the character to be modified or deleted. Enter the desired
character to modify the character or press Delete to delete the character selected.
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Delay Calibration of the Analog Channel

When using an oscilloscope for actual measurement, the transmission delay of the probe cable may bring relatively greater error (zero offset). Zero offset is defined as the offset of the crossing point of the waveform and trigger level line relative to the trigger position, as shown in the figure below.
Figure 2-3 Zero Offset
For MSO2000A/DS2000A, users can set a delay time to calibrate the zero offset of the corresponding channel. Press CH1 Delay-Cal and use to set the desired delay time. The range available is from -200 ns to 200 ns. Pressing down can restore the delay time to 0.00 s.
Note: This parameter is related to the instrument model and the current horizontal
time base setting. The larger the horizontal time base is, the larger the scale will be and the larger the setting step will be. Take MSO2302A as an example, when the horizontal time base is 50 ns, the step is 1 ns; when t he horizontal time base is 2 μs, the step is 40 ns; when the horizontal time base is greater than or equal to 10 μs, the delay calibration time cannot be adjusted.
MSO2000A/DS2000A User’s Guide 2-9
Chapter 3 To Set the Horizontal System RIGOL

Chapter 3 To Set the Horizontal System

The contents of this chapter:
Delayed Sweep Time Base Mode Horizontal Scale Horizontal Reference
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Delayed Sweep

Delayed sweep can be use d to enla rge a len gth of waveform horizontally t o view the waveform details.
Press MENU in the horizontal control area (HORIZONTAL) at the front panel and press Delayed to enable or disable delayed sweep. In delayed sweep mode, the screen is divided into two display areas as shown in the figure below.
Note: To enable delayed sweep, the current time base mode must be “Y-T” and the
“Pass/Fail test” must be disabled.
Main
Time Base
Delayed Sweep Time Base
The Waveform before
Enlargement
The Waveform after Enlargement
Figure 3-1 Delayed Sweep
The Waveform before Enlargement:
The waveform in the area that has not been covered by the subtransparent blue in the upper part of the screen is the waveform before enlargement. You can turn
HORIZONTAL HORIZONTAL
3-2 MSO2000A/DS2000A User’s Guide
POSITION to move the area left and right or turn SCALE to enlarge or reduce this area.
Chapter 3 To Set the Horizontal System RIGOL
Tip
The Waveform after Enlargement:
The waveform in the l ower part of the screen is the h orizontally expande d wa veform. Compared to the main time base, the delayed time base has increased the waveform resolution (as shown in the figure above).
Note: The delayed t ime base should be less than or equal to the main time bas e and
can be modified by rotating HORIZONTAL
SCALE.
You can also press down HORIZONTAL
SCALE (delayed sweep shortcut key)
to quickly switch to delayed sweep mode.
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Time Base Mode

Press MENU in the horizontal control area (HORIZONTAL) at the front panel and then press Time Base to select the time base mode of the oscilloscope and the default is Y-T.

Y-T Mode

In this mode, the Y axis represents voltage and the X axis represents time.
Note: Only when this m ode is enable d can “Delayed Sweep” be turned on. In this
mode, when the horizontal time base is greater than or equal to 200 ms, the instrument enters slow sweep mode. For the details, please refer to the introducti on of slow sweep in “Roll Mode”.

X-Y Mode

In this mode, the oscilloscope changes the two channels from voltage-time display mode to voltage-voltage display mode. Wherein, the X axis and Y axis tracks the voltages of CH1 and CH2 respectively . The phase deviation between two si gnals with the same frequency can be easily measured via Lissajous method. The figure below shows the measurement schematic diagram of the phase deviation.
The signal must be centered horizontally
II I
II I
D
A
B
C
III IV
III IV
Figure 3-2 Measurement Schematic Diagram of Phase Deviation
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According to sinθ=A/B or C/D (wherein, θ is the phase deviation angle between the two channels and the definitions of A, B, C and D are as shown in the figure above), the phase deviation angle is obtained, that is:
θ=±arcsin (A/B) or ±arcsin (C/D)
If the principal axis of the ellipse is within quadrant I and III, the phase deviation angle obtained should be within quadr ant I an d IV, namely within (0 t o π/2) or (3π/2 to 2π). If the principal axis of the ellipse is within quadrant II and IV, the phase deviation angle obtained s hould be wit hin qua dr ant II an d III, namel y within (π/2 to π) or (π to 3π/2).
X-Y function can be used to measure the phase deviation occurred when the signal under test passes through a ci rcuit network. Connect the oscilloscope to the ci rcuit to monitor the input and output signals of the circuit.
Application example: measure the phase deviation of the input signals of two channels.
Method 1: Use Lissajous method
1. Connect a sine signal to CH1 and then connect a sine signal with the same
frequency and amplitude but a 90° phase deviation to CH2.
2. Press AUTO and enable X-Y mode. Rotate HORIZONTAL
SCALE to adjust
the sample rate properly to get better Lissajous figure for better observation and measurement.
3. Rotate VERTICAL POSITION of CH1 and CH2 to display the signals at the center of the screen and rotate VERTICAL
SCALE of CH1 and CH2 to make the signals easy to observe. At this point, the circle as shown in the figure below should be displayed.
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RIGOL Chapter 3 To Set the Horizontal System
4. Observe the measurement result shown in the figure above. According to the measurement schematic diagram of the phase deviation (as shown in Figure 3-2
), A/B (C/D) = 1. Thus, the phase deviation angle θ=±arcsin1=90°.
Note:
The maximum sample rate of X-Y mode is 1.0 GSa/s. Generally, lon ger sample
waveform can ensure better display effect of Lissajous figure. But due to the limitation of the memory depth, you have to reduce t he wavefor m sample rat e to acquire longer waveform (refer to the introduction in “Memory Depth”). Therefore, during the measurement, reducing the sample rate properly can acquire better display effect of Lissajous figure.
When X-Y mode is enabled , “Delayed Sweep” will be disabled automatically. The following functions are not available in X-Y mode:
“Auto Measurement”, “Math Operation”, “Reference Waveform”, “Delayed Sweep”, “Vectors”, “horizontal position”, “To Trigger the
Oscilloscope”, “Protocol Decoding”, “Acquisition Mode”, “Pass/Fail Test”, “Waveform Record” and “Digital Channel
”.
Method 2: Use the shortcut measurement fu nction
Please measure the phase deviation between the input waveforms of CH1 and CH2 by referring to the phase deviation measurement function in “Delay and Phase”.
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Slow Sweep

Roll Mode

In this mode, the waveform scrolls from the right to the left to update the display. The range of horizontal scale adjustment is fro m 20 0.0 ms /div to 1.000 ks/div.
Note: When R oll mode is enabled, the w av ef orm “horizontal position”, “Delayed
Sweep”, “Protocol Decoding”, “Pass/Fail Test”, “Measurement Range”, “Waveform Record”, “To Set the Persistence Time” and “To Trigger the Oscilloscope” are not available.
Slow sweep is another mode similar to R oll mode. In Y-T mode, when the horizontal time base is set to 200 ms or slower, the instrument enters “slow sweep” mode in which the instrument first acquires the data at the l eft of the trigge r poi nt an d then waits for trigger event. After the trigger occurs, the instrument continues to finish the waveform at the right of the trigger point. When slow sweep mode is used to observe low frequency signal, it is recommended that the “Channel Coupling” is set to “DC”.
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Horizontal Scale

Horizontal scale, namely horizontal time base, refers to the time per grid in the horizontal direction on the screen and is usually expressed as s/div.
Being similar to “Vertical Sc ale “Fine” mode. Press MENU ScaleAdjust in the horizontal control area (HORIZONTAL) at the front panel to select the desired mode. Coarse: set the horizontal scale in 1-2-5 st ep namely 1 ns/div, 2 ns/div , 5 ns/div,
10 ns/div……1.000 ks/di v ( t a king adju sting MSO2302A counter clockwis e as an example).
Fine: further adjust the horizontal scale at a relatively smaller step.
After the adjustment mode is selected, turn HORIZONTAL horizontal scale. Turn clockwise to reduce the horizontal scale and turn countercloc kwi se to increase. The scale information at the upper left corner of the screen will change accordingly during the adjustment. The range of horizontal scale adjustment is related to the model of the oscilloscope as shown in the figure below.
”, the horizontal scale can be adjusted in “Coarse” or
SCALE to adjust the
Table 3-1 Range of Horizontal Scale
Models Range of Horizontal Scale MSO2302A/MSO2302A-S/DS2302A/DS2302A-S 1.000 ns/div to 1.000 ks/div MSO2202A/MSO2202A-S/DS2202A/DS2202A-S 2.000 ns/div to 1.000 ks/div MSO2102A/MSO2102A-S/DS2102A/DS2102A-S 5.000 ns/div to 1.000 ks/div MSO2072A/MSO2072A-S/DS2072A/DS2072A-S 5.000 ns/div to 1.000 ks/div
When adjusting the horizontal scale, the waveform will be expanded or compressed around the center of the screen, the trigger position or the user-defined position according to the change of the horizontal scale.
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Horizontal Reference

Horizontal reference is the reference position according to which the screen waveform is expanded or compressed horizontally when adjusting HORIZONTAL
SCALE. In Y-T mode and the delayed sweep is disabled, press MENU HorRef in the horizontal control area (HORIZONTAL) at the front panel to select th e desired reference mode and the default is “Center”.
Note: Thi s function is not a vailable in X-Y mode and Roll mode as well as in Y-T mode
when the delayed sweep is enabled.
1. Center
When changing the horizontal time base, the waveform is expanded or compressed horizontally around the center of the screen.
2. Trig Pos
When changing the horizontal time base, the waveform is expanded or compressed horizontally around the trigger point.
3. User
When changing the horizontal time base, the waveform is expanded or compressed horizontally around the user-defined reference position.
After this mode is selected, press RefPos and rotate to set the user-defined reference position. The range is from -350 (the rightmost of the screen) to 350 (the leftmost of the screen) and the default is 0 (the center of the screen). Press
down to restore the reference position to 0.
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Chapter 4 To Set the Sample System RIGOL

Chapter 4 To Set the Sample System

The contents of this chapter:
Acquisition Mode Sample Mode Sample Rate LA Sample Rate LA Memory De pth Memory Depth Anti-Aliasing
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Acquisition Mode

The acquisition mode is used to control how to generate waveform points from sample points.
Press Acquire Acquisition and use to select the desired acquisition mode (the default is “Normal”), then press down the knob t o select this mode. You can also press Acquisition continuously to switch the acquisition mode.

Normal

In this mode, the oscilloscope sam ples the signal at equal time int erval to rebuild th e wavef orm. For most of the wave forms, the best display effect can be obtained using this mode.

Average

In this mode, the oscilloscope averages the waveforms from multiple samples to reduce the rand om noise of the input signal and improve the v e rti cal resolution. The greater the nu mber of ave r ages is, the lower the nois e will be and the higher the vertic al resolution will be but the slower the response of the displayed waveform to the waveform changes will be.
When “Average” mode is selected, press Averages and use to set the de sired number of averages. The numbers of averages available include 2, 4, 8, 16, 32, 64, 128, 256, 512, 1024, 2048, 4096 and 8192. The default is 2.
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Figure 4-1 The Waveform before Average
Figure 4-2 The Waveform after 256 Averages
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Peak Detect

In this mode, the oscilloscope acquires the maximum and minimum values of the signal within the sample in terval to get the envelope of the signal or the narrow pulse of the signal that might be lost. In this mode, sig nal conf usion can be preve nted, but the noise displayed would be larger.

High Resolution

This mode uses a kind of ultra-sample technique to average the neighboring points of the sample w aveform to reduce the random n oise on the input signal a nd generate much smoother waveforms on the screen. This is generally used when the sample rate of the digital converter is hi gher than the st orage r ate of the ac quisition memory.
Note: “Average” and “High Res” modes use different averaging methods. The
former uses “Multi-sample Average” and the latter uses “Single Sample Average”.
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Tip

Sample Mode

This oscilloscope only supports real-time sample. In this mode, the oscilloscope samples and displays waveform within a trigger event. The maximum real-time sample rate of the analog channels of MSO2000A/DS2000A is 2 GSa/s and the current sample rate is displayed under the Sa Rate menu.
Press RUN/STOP to stop the sample, the oscilloscope will hold the last display. At this point, you can still use the vertical control and horizontal control to pan and zoom the waveform.
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Sample Rate

Sample refers to the process that the oscilloscope converts analog signals to digital signals at certain time i nterval and st ores the signals in se quence. The sample r ate is the reciprocal of the time int erval. T he ma ximum rea l-time sample rat e of t he a nalog channels of MSO2000A/DS2000A is 2 GSa/s.
Note: The sample rate is displa yed in the status bar at the upper side of the screen
and in the Sa Rate menu and can be changed indirectly by adjusting the horizontal time base through HORIZONTAL
The influence on the waveform when the sample rate is too low:
1. Waveform Distortion: when the sa m ple rate i s too low, som e wav eform details are lost and the waveform displayed is rather diff erent from the actual signal.
SCALE or modifying the “Memory Depth”.
2. Waveform Confusion: when the sample rate is lower than twice the actual
signal frequency (Nyquist Frequency), the frequency of the waveform rebuilt from the sample data is lower than the actual signal frequency.
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3. Waveform Leakage: when the sample rate is too low, the waveform rebuilt from the sample data does not reflect all the actual signal information.
Pulse disappeared

LA Sample Rate

LA sampling ref ers t o the process t hat the oscillosco pe samples the compa red digital signal at a certain time interval. LA sample rate is the reciprocal of the time interval. For example, the oscilloscope with 500 MSa/s LA sample rate samples digital signals once every 2 ns. The maximum sample rate of t he digital channels of the oscilloscope is 1 GSa/s.
Note:
1. The digital signal mentioned here refers to the signal generated by comparing
the input signal to the threshold specified by users. The comparison rule is that the input signal is judged as logic high level when it is g reater than the thresho ld and logic low level when it is lower than the threshold.
2. The LA sample rate is displayed in the LASaRate menu and can be changed
indirectly by adjusting the horizontal time base (s/div) through HORIZONTAL
SCALE or modifying the “Memory Depth”.
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T
Trigger Point
Pre-sample
Delayed Sample

Memory Depth

Memory Depth
Memory depth refers to the number of waveform point s tha t the o scilloscope can store in a single trigger sample and it reflects the storage ability of the sample memory. MSO2000A/DS2000A provides 14 Mpts standa rd memory depth and up to 56 Mpts memory de pth (option).
Figure 4-3 Memory Depth
The relation of memory depth, sample rate and wa ve form len gth fulfills the equation below:
Memory depth = Sample Rate (Sa/s) × Horizontal Time Base × Number of Grids
Horizontally
Wherein, for MSO2000A/DS2000A, the number of grids horizontally is fixed at 14. Therefore, under the same tim e base, higher memory depth can ensure higher sample rate.
Press Acquire Mem Depth, use to switch to the desired memory depth (the default is auto) and then press down the knob to select the option. You can also press Mem Depth continuously to switch the memory depth. When a single channel is enabled, the memory depths available include Auto,
14kPoints, 140kPoints, 1.4MPoints, 14MPoints and 56MPoints (option).
When CH1 and CH2 are enabled, the memory depths available include Auto,
7kPoints, 70kPoints, 700kPoints, 7MPoints and 28MPoints (option).
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In “Auto” mode, the oscilloscope selects the memory depth automatically according to the current sample r ate. At this point, you can adjust the memory depth indirectly by rotating HORIZONTAL
SCALE to adjust the sample rate.

LA Memory Depth

Press Acquire, you can view the current memory depth of the digital channel in LA Mem Depth. The LA Memory Depth will change with the memory depth of the
analog channel and cannot be set separately.

Anti-Aliasing

At slower sweep speed, the sample rate is reduced and a dedicated display algorithm is used to minimize the possibility of aliasing.
Press Acquire Anti-Aliasing to enable or disable the anti-aliasing function. By default, anti-aliasing is disabled.
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Chapter 5 To Trigger the Oscilloscope

As for trigger, you set certain trigger condition according to the requirement and when a waveform in the waveform stream meets this condition, the oscilloscope captures this waveform as well as the neighbouring part and displays them on the screen. For digital oscilloscope , it displays wav eform continuousl y no matter whether it is stably triggered, but only stable trigger can ensures stable display. The trigger module guarantees that each time base sweep or sample starts when the input signal meets the trigger condition defined by users; namely each sweep and sample are synchronous and the waveforms acquired overlap to display a sta ble waveform.
Trigger setting should be based on the features of the input signal, th us y ou n eed to have some knowledge of the signal under test to quickly capture the desired waveform. This oscilloscope provides abundant advanced trigger types which can help you to focus on t he desired waveform details.
The contents of this chapter:
Trigger Sourc e Trigger Mode Trigger Coupling Trigger Holdoff Noise Rejection Trigger Type Trigger Output Connector
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Trigger Source

Press MENU Source in the trigger control area (TRIGGER) at the front panel to select the desired trigger source. Signals input from CH1/CH2, the [EXT TR I G] connector or [LOGIC D0-D15] connector as well as the AC L ine can all be used as trigger source .
Analog channel input:
Signals input from analog channels CH1 and CH2 can all be used as the trigger source. No matter whether the channel selected is enabled, the channel can work normally.
Digital ch an n e l in p ut:
Signal input from any digital channel of D0-D15 can all be used as the trigger s ource . No matter whether the channel selected is enabled, the channel can work normally.
External trigger input:
Signals (such as external clock and signal of the circuit to be tested) input from the [EXT TRIG] connector can be us ed as the t ri g ger source. When this type of trigger source is selected, you can set the trigger level within -4 V to +4 V by rotating
TRIGGER
External trigger source can be used to connect external trigger signal to the [EXT TRIG] channel when both of the two channels are sampling data.
AC line:
The trigger signal is obtained from the AC powe r inp ut of the oscilloscope . AC trigger is usually used to measure signals relev ant t o the AC power fre quency. For example, stably trigge r the wa vefor m output from the transf ormer of a tr ansforme r substat ion; it is mainly used in related measurements of the power industry.
LEVEL.
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Trigger Mode

The following is the schematic diagram of the acquisition memory. To easily understand the trigger event, the acquisition memory is divided into the pre-trigger buffer an d pos t-trigger buffer.
Trigger Event
Pre-trigger Buffer
Acquisition memory
Post-trigger Buffer
Figure 5-1 Schematic Diagram of the Acquisiti on Memory
After the system runs, the oscilloscope operates by first filling the pre-trigger buffer. It starts searching for a trigger after the pre-trigger buffer is filled. While searching for the trigger, the data sampled will stil l be transmitted to the pre-trigger buffer (the new data will continuously ove rwrite the previous date). When a trigger i s foun d, the pre-trigger buffer contains the data acquired just before the trigger. Then, the oscilloscope will fill the post-trigger buffer and display the data in the acquisition memory. If the acquisition is activated via RUN/STOP, the oscilloscope will repeat this process; if the acquisition is activated via SINGLE, the os cilloscope will stop after finishing a single acquisition (you can pan and zoom the waveform currently displayed).
Press MODE in the trigger control area (TRIGGER) at the front panel or press MENU Sweep to select the desired trigger mode. The corresponding status light of the mode currently selected turns on.
Auto:
In this trigger mode, the oscilloscope will trigger, sample and display waveform forcibly if no specified trigger condition is found. This trigger mode should be use d when the sig nal lev el is unknown or the DC s hould be displayed as we ll as wh en for cible trigger is not necessa ry as the trigger condition always occurs.
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Normal:
In this trigger mode, the oscilloscope triggers and samples data only when the specif ied trigger condition is found. This trigger mode should be used when the signal is with low repetition rate or only the event specified by the trigger setting needs to be sampled as well as when auto trigger should be prevented to acquire stable display.
Single:
In this t rigger mode, the oscilloscope performs a single trigger and acquisition when the specified trigger condition is found and then stops. This trigger mode should be used when you need to perform a single acquisition of the specified event and analyze the acquisition result (you can pan and zoom the waveform currently displayed and the subsequent waveform data will not overwrite the current waveform).
Note: In Normal and Single trigger modes , pr e ss i ng FORCE can force a trigger.
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Trigger Coupling

Trigger coupling decides w hich kind of components will be transmitted to the trigger module. Please distinguish it with “Channel Coupling”.
DC: allow DC and AC components into the trigger path. AC: block all the DC components and attenuate signals lower than 75 Hz. LF Reject: block the DC components and reject the low frequency components
(lower than 75 kHz).
HF Reject: reject the high frequency components (higher than 75 kHz).
Press MENU Setting Coupling in the trigger control area (TRIGGER) at the front panel to select the desired coupling type (the default is DC) .
Note: Trigger coupling is only valid in edge trigger and when the trigger source is
CH1 or CH2.
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Trigger Holdoff

Trigger hold off can be used to stably trigger the complex waveforms. Holdoff time is the amount of time that the oscilloscope waits before re-arming the trigger module. The oscilloscope will not trigger even if the trigger c ondition is met during the holdoff time and will only re-arm the trigger module after the holdoff time expires. For example, to stably trigger the repeat pulse series as shown in the figure below, the holdoff time should be set to a value greater than T1 and lower than T2.
Holdoff Time
Trigger Positions
T1
T2
Figure 5-2 Schematic Diagram of Trigger Holdoff
Press MENU (in the trigger control area (TRIGGER) at the front panel) Setting Holdoff; then, turn or the inner knob of the na vigatio n kno b to modify the holdoff time at a relatively smaller step or turn the ou ter knob of the navi gation knob to adjust the holdoff time (the default is 100 ns) at a relatively larger step until the trigger becomes stable. The adjustable range is from 100 ns to 10 s.
Note: For MSO2000A/DS2000A, the trigger types that support trigger holdoff
include edge trigger , pulse trigger, runt trigger, windows trigger , slope trigger, pattern trigger, delay trigger and duration trigger.
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Noise Rejection

Noise rejecti on can reject the high frequency noise in the signal and reduce the possibility of miss-trigger of the oscilloscope.
Press MENU Setting Noise Reject in the trigger control area (TRIGGER) at the front panel to enable or disable noise rejection.
Note: When the t rigger s ource is any o f D0 to D15, Noise Reject is grayed out and
disabled.
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Trigger Type

MSO2000A/DS2000A provides various trigger types, including various serial bus triggers. You can press MENU (in the trigger control area (TRIGGER) at the front panel) Type to select the desired trigger type.
Edge Trigger Pulse Trigger Runt Trigger Windows Trigger (Option) Nth Edge Trigger (Option) Slope Trigger Video Trigger (HDTV Option) Pattern Trigg er Delay Trigger (Option) TimeOut Trigger (Option) Duration Trigger (Option) Setup/Hold Trigger RS232 Trigger I2C Trigger SPI Trigger USB Trigger (Option) CAN Trigger (Option)
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Edge Trigger

Trigger on the trigger threshold of the specified edge of the input signal.
Trigger Type:
Press Type, rotate to select “Edge” and press down . At this point, the trigger setting information is displ ayed at t he upper right c orner of the s creen. For example,
. The trigger type is edge trigger; the trigger source is CH1; the trigger
level is 170 mV.
Source Selection:
Press Source and select CH1, CH2, EXT, AC Line or any channel of D0-D15. For the details, please refer to the introduction in “ source is displayed at the upper right corner of the screen.
Note: Select channel with signal input as trigger source to obtain stable trigger.
Edge Type:
Press Slope to select the kind of edge of the input signal on which the oscilloscope triggers. The current edge type is displayed at the upper right corner of the screen.
: trigger on the rising edge of the input signal w hen the voltage level meets
the preset trigger level.
Trigger Mode: Press Sweep and select “Auto”, “Normal” or “Single”. For the details, please refer to
Trigger Mode”. The corresponding status light of the current trigger mode turns
“ on.
Trigger Setting:
Press Setting to set the trigger p aramete r s ( trigger coupling, trigge r hol do ff and noise rejection) under this trigger type.
Note: Trigger coupling is only available when the trigger source is CH1 or CH2.
When the trigger source is any of D0 to D15, Noise Reject is grayed out and disabled.
: trigger on the f alling edg e of the input si gnal when the voltage lev el meets
the preset trigger level.
: trigger on the risi ng or falling edge of the input signal when the voltage
level meets the preset trigger level.
Trigger Source”. The current trigger
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Trigger Level: Trigger occurs only when the signal reaches the preset trigger level. Use TRIGGER
LEVEL to modify the level. If the current trigger source is a digital channel, the
trigger level value will be displayed at the upper right corner of the screen. If the current trigger source is an analog channel, an orange trigger level line and the trigger mark “
” appear on the screen and move up or down with the rotation of
the knob, while at the sam e time, the trigger lev el value (such as
) at the
lower left corner of the screen also changes accordingly. When stopping turning the knob, the trigger level line and the trigger mark disappear in about 2 s.
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A B A
B

Pulse Trigger

In pulse t ri gge r mo de , the oscillosco pe will trigger w hen t he pulse wi dth of the in put signal satisfies the specified pulse width condition.
Trigger Type:
Press Type, rotate to select “Pulse” and press down . At this point, the trigger setting information is displ ayed at t he upper right c orner of the s creen. For example,
. The trigger type is pulse trigger; the trigger sou rce is CH 1; the trigger
level is 0.00 V.
Source Selection:
Press Source and select CH1, CH2, EXT or any channel of D0-D1 5. For the details, please refer to the introduction in “ displayed at the upper right corner of the screen.
Note: Select channel with signal input as trigger source to obtain stable trigger.
Pulse Condition:
In this oscilloscope, positive pulse width is defined as the time difference between the two crossing points of the trigger level and positive pulse; negative pulse width is defined as the time difference between the two crossing points of the trigger level and negative pulse, as shown in the figure below.
Trigger Source”. The current trigger source is
Trigger level
Positive
pulse width
Negitive
pulse width
Trigger level
Figure 5-3 Positive Pulse Width/Negative Pulse Width
Press When to select the desired pulse condition. : trigger when the positive pulse width of the input signal is greater than
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the specified pulse width.
: trigger when the positive pulse wi dth of the input si gnal is lower than the
specified pulse width.
: trigger when the positive pulse width of the input signal is greater than the specified lower limit of pulse width and lower than the upper limit of pulse width.
: trigger when the negativ e pulse wi dth of the in put s ignal is great er tha n the specified pulse width.
: trigger when the negative pulse width of the input signal is lower than
the specified pulse width.
: trigger when the negativ e pulse wi dth of the in put s ignal is great er tha n the specified lower limit of pulse width and lower than the upper limit of pulse width.
Pulse Width Setting:
When the Pulse Condition is set to
, , or , press Setting and turn or the inner knob of the navigation knob to adjust the pulse width at a relatively smaller step or turn the outer knob of the navigation knob to adjust the pulse width at a relatively larger step. The range available is from 2 ns to 4 s.
When the Pulse Condition is set to
or , press Upper Limit and Lower Limit respectively and adjust the upper limit and lower limit of pulse width using
or the navigation knob by referring to the method mentioned above. The range of the upper limit is from 10 ns to 4 s. The range of the lower limit is from 2 ns to 3.99 s.
Note: The lower limit of the pulse width must be lower than the upper limit.
Trigger Mode: Press Sweep and select “Auto”, “Normal” or “Single”. For the details, please refer to
Trigger Mode”. The corresponding status light of the current trigger mode turns
“ on.
Trigger Setting:
Press Setting to set the trigger parameters (trigger holdoff and noise rejection) under this trigger type.
Note: Noise rejecti on is grayed out and disabled automatically when the source is
set to any channel of D0-D15.
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