Tektronix TBS2102, TBS2072, TBS2074, TBS2104 User Manual

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TBS2000 Series Oscilloscopes

ZZZ

User Manual

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TBS2000 Series Oscilloscopes

ZZZ

User Manual

Revision C

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tional copyright laws and international treaty provisions.

Tektronix pro previously published material. Speciﬁcations and price change privileges reserved.

TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

TekVPI is a registered trademark of Tektronix, Inc.

TekSecure and TekSmartLab are trademarks of Tektronix, Inc.

ducts are covered by U.S. and foreign patents, issued and pending. Information in this publication supersedes that in all

Contacting Tektronix

Tektronix, Inc. 14150 SW Karl Braun Drive P.O. Box 500 Beaverton, OR 97077 USA

For product information, sales, service, and technical support:

In North America, call 1-800-833-9200. Worldwide, visit ww w.tek.com to ﬁnd contacts in your area.

TBS2000 Series Oscilloscopes

Warranty

Tektronix warrants that the product will be free from defects in materials and workmanship for a period of ﬁve (5) years from the date of original purchase from an authorized Tektronix distributor. If the product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange for the defective product. Batteries are excluded from this warranty. Parts, modules and replacement products used by Tektronix for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, shipping charges prepaid, and with a copy of customer proof of purchase. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all sh ipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair o r service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modiﬁed or integrated with other products when the effect of such modiﬁcation or integration increases the time or difﬁculty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM A NY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIA L DAMAGES IRRESPECTIVE OF WHE THER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

TPP0100 Probe

Warranty

Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option, either will repair the defective product without charge for parts and labor, or w ill provide a replacement in exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty work may be new or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.

This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modiﬁed or integrated with other products when the effect of such modiﬁcation or integration increases the time or difﬁculty of servicing the product.

THIS WARRANTY IS GIVEN BY TEKTRONIX W ITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX' RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.

Table of Contents

Important safetyinformation .......................................................................................................... v

Preface................................................................................................................................. ix

Key features...................................................................................................................... ix

Terms in this manual . .. .. .. .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . x

Symbols and terms on the product ... . .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . .. ... . .. .. . . . . ... . x

Conventions used in this manual . .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. . . . . . . ... . .. . xi

Installation.............................................................................................................................. 1

Before installation................................................................................................................ 1

Operating requirements .. . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . ...... 5

Environment requirements.. . .. . . . . ... . .. .. .. . . ... . .. .. .. .. ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . . . . . . . ... . 5

Power requirements . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . .. ... . .. .. . . .. ... . .. .. . . . . ... . .. .. .. . . . 5

Getting acquainted with the oscilloscope .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. . . . . . . ... . .. . . . . ... 6

Powering on and off the oscilloscope ........................................................................................... 7

Changing the user interface language .. . .. . . .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. . 8

Changing the date and time .. . .. .. .. . . . . ... . .. .. .. . . ... . .. .. .. .. ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . . . . 11

Connecting probes to the oscilloscope. . .. .. .. ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. . . . . . . ... . .. . . . . . . ... . .. .. ... . .. . 13

Reducing electrostatic damage while taking measuremens ... . .. .. .. . . . . .. ... . .. .. .. .. ... . .. .. .. .. . . . . . . . . . . .. ... . .. .. . 13

Doing a functional check . .. .. ... . .. .. ... . .. .. . . ... . .. .. . . ... . .. .. ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . . ... . .. .. ... . .. .. . . . . ... . .. . . . 14

What is Autoset?........................................................................................................... 16

Compensating a passive voltage probe. . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. 17

Signal path compensation (SPC). . . . . . . . ... . .. .. .. . . ... . .. .. . . .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . .. ... . .. .. . . . . ... . .. .. .. . . ... 20

Getting on-screen helpfor settings: Help Everywhere ........................................................................ 21

The Scope Intro function........................................................................................................ 23

Sampling oscilloscope concepts ..................................................................................................... 24

Sampling and acquisition concepts ............................................................................................ 24

Trigger concepts . ... . .. .. . . . . ... . .. .. . . ... . .. .. ... . .. .. . . . . ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. . . . . . . ... . .. . . . . . . ... 26

Trigger slope and level concepts.. . .. .. . . ... . .. .. ... . .. .. .. ... . .. .. . . . . ... . .. .. ... . .. .. .. ... . .. .. . . . . ... . .. .. ... . .. .. .. ... 27

Setting channel input parameters .. .. ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . ... . .. .. ... . .. 30

Setting input signal coupling .. . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . . . . ... . .. .. ... . 30

Inverting the input signal . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . ... . .. .. ... . .. .. .. . . ... . .. .. ... . .. .. .. ... . .. 30

ing the oscilloscope bandwidth.. . ... . .. .. . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . ... . .. .. 31

Sett

Setting the probe type (voltage or current)..................................................................................... 31

Setting the probe attenuation factor .. . . . . . . ... . .. . . . . . . ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. . . . . . . ... . .. . . . . . . ... . .. 32

Quickly setting the probe attenuation to 1X or 10X . .. . . ... . .. .. ... . .. .. . . . . ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. . . . 32

Setting the Measure Current mode for voltage probes .. . .. .. . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . .. ... . .. .. . . . . ... . .. .. . . . . ... 32

Setting the input signal vertical offset . . .. .. . . . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. 33

Setting the waveform vertical position.......................................................................................... 33

The difference between vertical position and vertical offset ............................................................. 34

Setting channel deskew. . . . . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . . . . ... . .. .. ... . .. .. .. ... . .. . . . . . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . 34

Trigger setup . .. .. . . . . .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. ....... 36

Triggering on a waveform edge .. . ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... . .. .. . . ... . .. .. ... 36

Triggering on a speciﬁed pulse width .......................................................................................... 37

Table of Content

TBS2000 Series User Manual i

Table of Content

Acquisition setup...................................................................................................................... 40

Waveform display settings ........................................................................................................... 47

Analyzing a waveform .. . .. .. . . . . . . ... . .. .. . . ... . .. .. ... . .. .. . . . . ... . .. .. . . . . ... . .. .. ... . .. .. .. ... . .. . . . . . . ... . .. .. . . . . ... . .. . . . . . . ... 50

Saving data ........................................................................................................................... 66

Triggering on a runt pulse....................................................................................................... 38

Setting the trigger mode . .. .. ... . .. .. . . . . ... . .. .. . . ... . .. .. ... . .. .. . . . . ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. . . . . . . ... 39

Using Autoset ................................................................................................................... 40

Autoset tips ................................................................................................................ 40

How to disable Autoset in the oscilloscope............................................................................... 40

How to change the Autoset password . . .. . . ... . .. .. .. . . . . . . . . ... . .. .. .. .. ... . .. .. .. . . ... . .. .. .. . . . . . . . . ... . .. .. .. .. ... . .. 41

Starting and stopping an acquisition . . .. ... . .. . . . . . . ... . .. .. . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . 42

Setting the acquisition mode.................................................................................................... 42

Setting the acquisition trigger delay time.. . .. .. .. .. . . . .. .. .. .. .. .. .. .. .. .. .. .. . . . .. .. .. .. .. .. .. .. .. .. .. .. .. .. .. . . . .. .. .. .. .. .. . 43

Setting the record length . .. .. . . . . ... . .. .. ... . .. .. . . . . ... . .. .. . . . . ... . .. .. ... . .. .. .. ... . .. . . . . . . ... . .. .. . . . . ... . .. . . . . . . ... . .. .. . 44

Using the roll display mode..................................................................................................... 45

Setting the oscilloscope to factory default values (Default Setup) ............................................................ 46

Displaying and removing a waveform.......................................................................................... 47

Setting the waveform persistence.............................................................................................. 47

The XY display mode ........................................................................................................... 48

Setting the backlight intensity................................................................................................... 49

Taking automatic measurements............................................................................................... 50

Automatic measurements tip.............................................................................................. 51

Taking a measurements snapshot . ... . .. .. .. . . ... . .. .. . . .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . 51

Snapshot measurement tip. . .. .. ... . .. .. .. . . . . . . . . ... . .. .. .. . . . . . . . . ... . .. .. .. .. ... . .. .. .. . . ... . .. .. .. . . . . . . . . ... . .. .. .. .. 51

Automatic measurement descriptions.......................................................................................... 52

Frequency measurement descriptions. .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... 52

Time measurement descriptions.......................................................................................... 52

Amplitude measurement descriptions .................................................................................... 53

Area measurement descriptions .......................................................................................... 55

Taking a measurement on just a part of the waveform (Gating) .............................................................. 55

Using cursors to take manual measurements .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . .. ... 56

Creating math waveforms ...................................................................................................... 58

Math waveformtips........................................................................................................ 59

Using FFT to see signal frequency information . .. .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... 59

FFT tips .................................................................................................................... 61

About FFT windows . . .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... . .. .. .. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. ... . .. .. .. . . . . . . . . . . . 62

FFT and display waveform aliasing....................................................................................... 63

Displaying reference waveforms ............................................................................................... 64

Reference waveform tips.................................................................................................. 64

How to view long record length waveforms (Zoom) . .. .. .. .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. 65

Saving screen images to a ﬁle.................................................................................................. 66

About saved image ﬁle formats ........................................................................................... 66

Saving waveform data .......................................................................................................... 67

About waveform data ﬁles................................................................................................. 68

Saving oscilloscope setup information ......................................................................................... 69

ii TBS2000 Series User Manual

Table of Content

Saving ﬁles to USB with the Save File button.................................................................................. 70

Recalling data......................................................................................................................... 71

Recalling oscilloscope setup information....................................................................................... 71

Recalling waveform data........................................................................................................ 72

Using the USBFile Utility functions.................................................................................................. 73

Overview of the File Utility pane ... . .. ... . .. .. . . ... . .. .. ... . .. . . ... . .. .. . . ... . .. ... . .. .. . . ... . .. .. ... . .. . . ... . .. .. . . ... . .. ... . .. 73

Changing the default ﬁle save location on the USB drive ..................................................................... 75

Default save folder location rules ......................................................................................... 75

Creating a new folder on the USB drive........................................................................................ 76

Folder creation tip ......................................................................................................... 76

Deleting ﬁles or folders from the USB drive.................................................................................... 76

Renaming ﬁles or folders on the USB drive ................................................................................... 77

File, folder renaming tip . .. ... . .. .. .. ... . .. .. ... . .. .. .. . . ... . .. .. . . ... . .. .. ... . .. .. .. . . ... . .. .. . . ... . .. .. ... . .. .. .. . . ... . .. 77

Formatting the USB drive ....................................................................................................... 78

About automatically generated ﬁle names..................................................................................... 78

Image, setting, and waveform ﬁle tips .................................................................................... 78

Erasing data from oscilloscope memory (TekSecure)............................................................................... 79

Setting orviewing USB Device port parameters .................................................................................... 80

Selecting which device is attached to the USB Device port................................................................... 80

Disabling the USB Device port ................................................................................................. 81

Viewing the USBTMC information.............................................................................................. 81

Setting upthe LAN network..........................................................................................................82

Viewing the IP address - Ethernet . .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... 82

Setting the IP address (DHCP network)- Ethernet.. . .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. .. . . 83

Setting the IP address (nonDHCP network)- Ethernet . . .. .. ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. 83

Turning Ethernet DHCP onor off............................................................................................... 84

Setting upthe Wi-Fi network ......................................................................................................... 85

Turning Wi-Fi on or off .......................................................................................................... 85

Viewing Wi-Fi settings .......................................................................................................... 86

Viewing and selecting available Wi-Finetworks ............................................................................... 86

Setting the IP address (DHCP network) in Wi-Fi . .. .. .. . . . . . . . . ... . .. .. .. .. ... . .. .. .. . . . . . . . . . . . . . . ... . .. .. .. .. ... . .. .. .. .. ... 87

Setting the IP address (nonDHCP network) in Wi-Fi . . . . . ... . .. .. .. .. ... . .. .. .. . . ... . .. .. .. .. ... . .. .. .. . . ... . .. .. .. . . . . . . . . ... 88

Turning DHCP on or off (Wi-Fi)................................................................................................. 89

Remotely controlling the oscilloscope from a Web browser (LXI) .................................................................. 90

Installing new ﬁrmware on the oscilloscope ......................................................................................... 91

Running diagnostic tests . ... . .. .. . . . . ... . .. .. . . ... . .. .. ... . .. .. . . . . ... . .. .. . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. . . .... 92

Courseware; on-instrument education and training .. . .. .. .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . . . 93

Loading a courseware ﬁle from a USB drive................................................................................... 94

Running Courseware lab exercises ............................................................................................ 95

Saving Courseware lab results ................................................................................................. 96

The oscilloscope controls ............................................................................................................ 97

The Navigation controls......................................................................................................... 97

The Horizontal controls ......................................................................................................... 99

The Trigger controls. . ... . .. .. ... . .. .. ... . .. .. . . ... . .. . . . . ... . .. .. ... . .. .. ... . .. .. . . ... . .. . . . . ... . .. .. ... . .. .. ... . .. .. . . ... . .. . . . 99

The Vertical controls .......................................................................................................... 100

TBS2000 Series User Manual iii

Table of Content

The graphical user interface elements. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. . . . . ... . 106

Warranted speciﬁcations ............................................................................................................ 111

The default o

Physically securing the oscilloscope...............................................................................................114

Environmen

Safety andcompliance information ................................................................................................ 116

Index

The Resources controls....................................................................................................... 101

Other front-pa

Using the menu system....................................................................................................... 102

Front-panel connectors . . .. .. ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . ... . .. .. . . . . ... . .. .. .. . . ... . .. .. . . . . . 104

Rear-panel co

Oscilloscope settings that are not reset by Default Setup................................................................... 113

Product end-of-life handling . . . . ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . . . ... . .. . . . . . . ... . .. . . . . . . ... . .. .. ... . .. .. . . ... . .. .. . . 115

nel controls..................................................................................................... 101

nnectors. . . .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . . . . . . . ... . .. .. .. . . ... . .. .. .. . . ... . .. .. .. . . . . . . . . . 105

scilloscope settings (Default Setup) ................................................................................. 112

tal considerations...................................................................................................... 115

iv TBS2000 Series User Manual

Important safet

y information

Important saf

This manual contains information and warnings that must be followed by the user for safe operation and to keep the product in a safe condition. To safely perform service on this product, additional information is provided at the end of this section.

General safety summary

Use the product only as speciﬁ ed. Review the following safety precautions to avoid injury and prevent damage to this product or any produ

Comply with local and national safety codes.

For correct and safe operation of the product, it is essential that you follow generally accepted safety procedures in addition to the safety precautions speciﬁed in this manual.

The product is designed to be used by trained personnel only.

Only qualiﬁed personnel who are aware of the hazards involved should remove the cover for repair, maintenance, or adjustment.

Before use, always check the product with a known source to be sure it is operating correctly.

This product is not intended for detection of hazardous voltages.

Use personal protective equipment to prevent shock and arc blast injury where hazardous live conductors are exposed.

While using this product, you may need to access other parts of a larger system. Read the safety sections of the other component manuals for warnings and cautions related to operating the system.

cts connected to it. Carefully read all instructions. Retain these instructions for future reference.

ety information

When incorporating this equipment into a system, the safety of that system is the responsibility of the assembler of the system.

To avoid ﬁre or personal injury

Use proper power cord. Use only the power cord speciﬁed for this product and certiﬁed for the country of use.

Do not use the provided power cord for other products.

Ground the product. This product is grounded through the grounding conductor of the power cord. To avoid electric

shock, the grounding conductor must be connected to earth ground. Before making connections to the input or output terminals of the product, ensure that the p roduct is properly grounded.

Do not disable the power cord grounding connection.

Power disconnect. The power cord disconnects the product from the power source. See instructions for the location.

Do not position the equipment so that it is difﬁcult to access the power cord; it must remain accessible to the user at all times to allow for quick disconnection if needed.

Connect and disconnect properly. Do not connect or disconnect probes or test leads while they are connected

to a voltage source.

Use only insulated voltage probes, test leads, and adapters supplied with the product, or indicated by Tektronix to be suitable for the product.

Observe all terminal ratings. To avoid ﬁre or shock hazard, observe all ratings and markings on the product. Consult

the product manual for further ratings information before making connections to the product. Do not exceed the Measurement

TBS2000 Series User Manual v

Important safet

Category ( CAT) rating and voltage or current rating of the lowest rated individual component of a product, probe, or accessory. Use

Do not apply a potential to any terminal, including the common terminal, that exceeds the maximum rating of that terminal.

Do not ﬂoat the common terminal above the rated voltage for that terminal.

Do not operate without covers. Do not operate this product with covers or panels removed, or with the case open.

Hazardous voltage exposure i s possible.

Avoid exposed circuitry. Do not touch exposed connections and components when power is present.

Do not operate with suspected failures. If you suspect that there is damage to this product, have it inspected by

qualiﬁed service personnel.

Disable the product if it is damaged, Do not use the product if it is damaged or operates incorrectly. If in doubt about safety of the product, turn it off and disconnect the power cord. Clearly mark the product to prevent its further operation.

y information

caution when using 1:1 test leads because the probe tip v oltage is directly transmitted to the product.

Before use, inspect voltage probes, test leads, and accessories for m use probes or test leads if they are damaged, if there is exposed metal, or if a wear indicator shows.

Examine the exterior of the product before you use it. Look for cracks or missing pieces.

Use only speciﬁed replacement parts.

echanical damage and replace when damaged. Do not

Do not operate in wet/damp conditions. Be aware that condensation may occur if a unit is moved from a cold to a

warm environment.

Do not operate in an explosive atmosphere.

Keep product surfaces clean and dry.

Remove the input signals before you clean the product.

Provide proper ventilation. To ensure proper cooling, keep the sides and rear of the instrument clear of obstructions.

Slots and openings are provided for ventilation and should never be covered or otherwise obstructed. Do not push objects into any of the openings.

Provide a safe working environment. Always place the product in a location convenient for viewing the display

and indicators.

Avoid improper or prolonged use of keyboards, pointers, and button pads. Improper or prolonged keyboard or pointer use may result in serious injury.

Be sure your work area meets applicable ergonomic standards. Consult with an ergonomics professional to avoid stress injuries.

Probes and test leads

Before connecting probes or test leads, connect the power cord from the power connector to a properly grounded power outlet.

Keep ﬁngers behind the ﬁ nger guards on the probes.

Remove all probes, test leads and accessories that are not in use.

Use only correct Measurement Category ( CAT), voltage, temperature, altitude, and amperage and adapters for any measurement.

vi TBS2000 Series User Manual

rated probes, test leads,

Important safet

y information

Beware of high voltages. Understand the voltage ratings for the probe you are using and do not exceed those ratings.

Two ratings are

important to know and understand:

The maximum me

The maximum ﬂo

These two volt

WARNING. To prevent electrical shock, do not exceed the maximum measurement or maximum ﬂoating voltage for the

oscilloscope input BNC connector, probe tip, or probe reference lead.

Connect and disconn

probe to the circuit under test. Connect the probe reference lead to the circuit under test before connecting the probe input. Disconnect the probe input and the probe reference lead from the circuit under test before disconnecting the probe from the measurement pr

asurement voltage from the probe tip to the probe reference lead

ating voltage from the probe reference lead to earth ground

age ratings depend on the probe and your application. Refer to the Speciﬁcations manual for more information.

ect properly.

oduct.

Connect the probe output to the measurement product before connecting the

Connect and disconnect properly. De-energize the circuit under test before connecting or disconnecting the current

probe.

Connect the probe reference lead to earth ground only.

Do not connect a current probe to any wire that carries voltages above the current probe voltage rating.

Inspect the probe and accessories. Before each use, inspect probe and accessories for damage (cuts, tears, or

defects in the probe body, accessories, or cable jacket). Do not use if damaged.

Service safety

The Service safety summary section contains additional information required to safely perform service on the product. Only qualiﬁed personnel should perform service procedures. Read this Service safety summary and the General safety summary before performing any service procedures.

To avoid elec

summary

tric shock.

Do not touch exposed connections.

Do not service alone. Do not perform internal service or adjustments of this product unless another person capable of

rendering ﬁrst aid and resuscitation is present.

Disconnect power. To avoid electric shock, switch off the product power and disconnect the power cord from the mains

power before removing any covers or panels, or opening the case for servicing.

Use care when servicing with power on. Dangerous voltages or currents may exist in this product. Disconnect

power, remove battery (if applicable), and disconnect test leads before removing protective panels, soldering, or replacing components.

Verify safety after repair. Always recheck ground continuity and mains dielectric strength after performing a r epair.

TBS2000 Series User Manual vii

Important safet

Terms in product manuals

These terms may appear in the product manuals:

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

CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.

Symbols and terms on the product

These terms may appear on the product:

y information

DANGER indicates an injury hazard immediately accessible as you read the marking.

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION indicates a hazard to property including the product.

When this symbol is marked on the product, be sure to consult the manual to ﬁnd out the nature of the potential hazards and any actions which have to be taken to avoid them. (This symbol may also be used to refer the user to ratings

in the manual.)

The following symbol(s) may appear on the product:

viii TBS2000 Series User Manual

Preface

This manual describes the installation and operation of the following oscilloscopes:

TBS2072 TBS2102 TBS2074 TBS2104

Key features

This oscilloscope can help you verify, debug, and characterize electronic designs. K ey features include:

100 MHz and 70 MHz bandwidths

2 channel and 4 channel models

TekVP I®Versatile Probe Interface supports active voltage and current probes for automatic scaling and units

Large 9 inch (228 mm) WVGA wide-screen color display

Sample rates up to 1 GS/s (1 channel on 2-channel instruments; 2 channels on 4-channel instruments)

Up to 20 million points record length on every channel

Preface

10,000 waveforms/second capture rate

More than 32 automated measurements

Runt and pulse width triggers

FFT analysis for waveform spectrum analysis

Wi-Fi (with optional TEKUSBWIFI dongle) and Ethernet for remote operation and programming

Embedded LXI Web site, accessed by typing instrument IP address into a Web browser, provides remote UI control and SCPI co

USB 2.0 drives; installing ﬁrmware updates; and loading waveforms and settings from saved ﬁles

USB 2.0 Device port for direct PC control of the oscilloscope using TekVISA connectivity, and other remote connectivity tools that support USBTMC

Scope Intro provides a built-in overview of oscilloscope concepts and an introduction to the TBS2000 controls and feat

Help

settings

Courseware function provides on-oscilloscope teaching instruction, with hundreds of courses available on the Tektronix Education Web page and the ability to easily create courses speciﬁc to your education needs

mmand support

Host ports for quick and easy storage of screen images, instrument settings, and waveforms to USB ﬂash

ures

Everywhere displays graphics and short text descriptions when you access the menus for most oscilloscope

TBS2000 Series User Manual ix

Preface

Terms in this manual

These terms may appear in this manual:

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

CAUTION. Caution statements identify conditions or practices that could result in damage to this product or other property.

Symbols and terms on the product

These terms may appear on the product:

DANGER indicates an injury hazard immediately accessible as you read the marking.

WARNING indicates an injury hazard not immediately accessible as you read the marking.

CAUTION indicates a hazard to property including the product.

in the manual.)

The following symbol(s) may appear on the product:

x TBS2000 Series User Manual

Conventions used in this m anual

The following icons are used throughout this manual.

Preface

Sequence Step

Front panel power

Connect power

Network

USB

TBS2000 Series User Manual xi

Preface

xii TBS2000 Series User Manual

Installation

Before installation

Unpack the oscilloscope and check that you received all it ems listed as standard accessories. The following pages list recommended accessories and probes, oscilloscope options, and upgrades. Check the Tektronix Web site (www.tektronix.com) for the most current information.

Standard accessories

Accessory Description

TBS2000 Series Oscilloscopes Safety and Installation Instructions

TBS2000 Series Oscilloscopes Documentation Browser CD

Calibration certiﬁ cate documenting traceability to national metrology institute(s), and ISO9001 quality system registration.

Probes (all models)

Five year warranty

Power cord

Printed safety and installation information. The instructions are translated into 10 languages.

Electronic versions of documents, including the User Manual, Programmer Manual and Technical References.

2 Ch Models: Two TPP0100 100 MHz, 10X passive voltage probes with 10 M input resistance.

4 Ch Models: Four TPP0100 100 MHz, 10X passive voltage probes with 10 M input resistance.

For details, r efer to the warranty at the front of this manual

North America (Option A0)

Universal Euro (Option A1)

United Kingdom (Option A2)

Australia (Option A3)

Switzerland (Option A5)

Japan (Option A6)

China (Option A10)

India (Option A11)

Brazil (Option A12)

No power cord or AC adapter (Option A99)

Installation

Tektronix part number

071-3556-xx

063-4568‑xx

––

TPP0100

––

161-0348-xx

161-0343-xx

161-0344-xx

161-0346-xx

161-0347-xx

161-0342-xx

161-0341-xx

161-0349-xx

161-0356-xx ––

TBS2000 Series User Manual 1

Installation

Standard accessories (cont.)

Accessory Description

Front-panel overlays are provided with the ordered language option.

French (Option L1)

Italian (Option L2)

German (Option L3)

Spanish (Option L4)

Japanese (Option L5)

Portuguese (Option L6)

Simpliﬁed Chinese (Option L7)

Traditional Chinese (Option L8)

Korean (Option L9)

Russian (Option L10)

Tektronix part number

2 TBS2000 Series User Manual

Installation

Optional accessories

Accessory Description Tektronix part number

TEKUSBWIFI The USB module adds Wi-Fi connectivity for remote

programmabil

TekVP I®probes that work with TBS2000 Seri

50  BNC adapter Connect 50  cables to the oscilloscope

Deskew puls

Power meas calibration ﬁxture

TEK-USB-488 A dapter GPIB to USB Adapter TEK-USB-488

Soft transit cas e

Hard transit case (requires use of

ansit case)

soft tr

The TBS2000 series oscilloscopes work with multiple optional probes. (See page 13, Connecting probes to the oscilloscope.) Check the Tektronix Web site (www.tek.com) for the most current information.

es oscilloscopes

e generator

urement deskew and

Visit theOsc Tool on the Tektronix Web site at www.tek.com

Deskew puls TekVPI oscilloscope interface

Converts TEK-DPG pulse generator output into a series of test point connections

Two-channel oscilloscopes

Four-channel oscilloscopes

Two- and four-channel oscilloscopes HCTEK4321

ity and control

illoscope Probe and Accessory Selector

e generator and signal source with

TEKUSBWIFI

013-0227-00

TEK-DPG

067-1686-

ACD2000

ACD4000B

Related documentation (cont.)

Accessory Description Tektronix part number

TBS2000 Series Oscilloscopes Programmer Manual

TBS2000 Series Oscilloscopes Service Manual

Describes commands for remote control of the oscilloscope. Available electronically on the Documentation Browser CD or for download from www.tektronix.com/manuals. English only.

Service information. Available electronically on the Documentation Browser CD or for download from www.tek.com/downloads. English only

077-1149-xx

077-1150-xx

4 TBS2000 Series User Manual

Operating requi

rements

Operating req

Make sure to operate the instrument within the following environmental and power requirements.

uirements

Environment requirements

Characteristic Description

Operating temperature 0 °C to +50 °C, with 5 °C/minute maximum gradient, noncondensing, up to 3000 meter

Operating humidity 5% to 95% relative humidity (% RH) up to +30 °C

Operating altitude Up to 3000 meters (9842 feet)

Power requirements

Characteristic Description

Power source voltage

Power source frequency 50/60 Hz over entire source voltage range

Power consumption All models: 80 W maximum

altitude

5% to 60% RH above +30 °C up to +50 °C, noncondensing

100 V

400 Hz (360 Hz to 440 Hz) for 115 V

– 240 VAC±10% RMS, single phase

(100 VAC– 132 VAC) RMS source voltage range

CAUTION. A ground connection through the power cord grounding conductor is essential for safe operation.

TBS2000 Series User Manual 5

Getting acquain

ted with the oscilloscope

Getting acqua

This section shows you how to power on the oscilloscope, and uses a hands-on approach to introduce you to key oscilloscope functions, using the menu system, and verifying that the oscilloscope is operating correctly.

inted with the oscilloscope

6 TBS2000 Series User Manual

Powering on and off the oscilloscope

Grounding the oscilloscope is necessary for safety and to take accurate measurements. The oscilloscope must share the same ground as any circuits that you are testing. You connect the oscilloscope to ground by plugging the three-pronged power cord into an outlet grounded to earth ground.

To connect the power cord and power on the oscilloscope:

Getting acquain

ted with the oscilloscope

To power off the oscilloscope and remove the power cord:

TBS2000 Series User Manual 7

Getting acquain

ted with the oscilloscope

NOTE. The current instrument settings are stored in nonvolatile memory when you power off the oscilloscope. The

oscilloscope restores the settings when you power on.

Changing the user interface language

You can change the language used for the oscilloscope on-screen display, measurements, readouts, and menus to one of 11 languages.

The following steps show how to change the user interface language. These steps also introduce you to the oscilloscope menu system.

1. Push the Utility front-panel button. The oscilloscope displays a side menu on the right side of the screen.

htheLanguage side-menu button.

2. Pus

8 TBS2000 Series User Manual

Getting acquain

ted with the oscilloscope

The oscillosco menu.

YouwillusetheMultipurpose knob to select and c following text describes how the Multipurpose knob works.

The Multipurpose knob lets you interact with on-screen m boxes.

A blue-colored M icon on a menu, message, or dialog bo the Multipurpose knob to select and click values in that item.

The turn arrow indicator, located below the knob, turns green when you can use the knob to ma menu or dialog box.

pe opens the Language

lick menu items. The

enus, messages, and dialog

x label means that you can use

ke selections or enter values in a

The knob has two functions:

Select function, where you turn the

knob to select (highlight) a menu item. Selecting a menu item does not execute (run) that function.

Click function, where you push the

knob to either run the selected menu item or enable a ﬁeld in that menu item to enter numbers or select values.

3. Turn the Multipurpose knob to select a

uage.

lang

TBS2000 Series User Manual 9

Getting acquain

4. Click (push) the Multipurpo se knob

5. Push the Menu On /Off buttontoclose

ted with the oscilloscope

to enter the highlighted language. The selected l immediately.

the Utility

anguage takes effect

menu.

6. If you load install the plastic overlay on the front panel to provide labels in that language. Fold the o over the knobs until the knob hole tabs click over the bottom edges of the knobs. Insert t slots.

If you are changing from a non English languag front-panel language overlay.

a language other than English,

verlay tabs. Push the overlay

he overlay tabs into the small

e to English, remove the

10 TBS2000 Series User Manual

Changing the date and time

Set the current data and time so that ﬁles that you save are marked with the correct date and time. The date and time are shown in the lower-right corner of the screen. Time is shown using a 24-hour clock.

NOTE. The clock does not automatically adjust for seasonal time changes. The calendar does adjust for leap years.

The following steps show how to set the oscilloscope clock with the current date and time. These steps also introduce you to more functions of the menu system.

1. Push Utility front-panel button.

Getting acquain

ted with the oscilloscope

2. Push Set D

button. The oscilloscope shows the Set

Date & Time menu.

3. Turn the Multipurpose knob to select

the Yea

ate & Time side-menu

r ﬁeld.

TBS2000 Series User Manual 11

Getting acquain

4. Click the Multipurpose knob to enable

5. Turn the Multipurpose knob to change

6. Repeat steps 3 – 5 to select and change

7. When you have ﬁnished making all date

ted with the oscilloscope

setting the year value. A white box is drawn around t that you can use the Multipurpose knob to change that value.

the year value in the ﬁeld.

When the val Multipurpose knob. This enters the number and returns the knob to menu select mode

the remain (Month, Day, Hour, Minute).

and time changes, turn the Multipurpose knob to s click the knob to enter the date/time settings into the oscilloscope.

he number ﬁeld, indicating

ue is correct, click the

ing date and time settings

elect Set Date & Time, then

8. To turn off displaying the date and time,

Display Date & Time and click the

select

Multipurpose knob to toggle On or Off.

9. Push the Menu On /Off buttontoclose

the Utility side menu.

The new date and time are shown in the lower-right corner of the screen.

12 TBS2000 Series User Manual

Connecting probes to the oscilloscope

You must connect probes or cables to an oscilloscope before you can display a waveform and take measurements. The following text describes how to connect probes to the oscilloscope.

1. BNC probes or cables: Push the BNC

probe or cable on to the connector so that the c onnector pins align with the slots, then turn the BNC connector clockwise to lock. The probes that ship with the oscilloscope are BNC connector probes.

NOTE. If you connect a cable to the channel

input, you will need an impedance matching adapter to convert the cable impedance (typically 50 Ω, but it depends on the cable) to work with the 1 MΩ channel input impedance.

Getting acquain

ted with the oscilloscope

2. Tektronix Versatile Probe Interface (TekVPI®): Push the probe base into the channel connector until the probe base

connector clicks. To remove, push and hold the button on the probe base and pull the probe from the connector.

TekVPI (10X, 1X, X10, and so on).

probes automatically set the oscilloscope probe parameters such as type (voltage, current) and attenuation

Supported probe types

For more information on the many probes available for use with TBS2000 Series oscilloscopes, visit the Oscilloscope Probe and Accessory Selector tool on the Tektronix Web site (www.tek.com).

cing electrostatic damage while taking measuremens

Redu

Static electricity that builds up on your body can damage static-sensitive components.

uareworkingwithstatic-sensitive

If yo components, ground yourself when using probes. Wearing a grounding strap s afely

ds static charges on your body to earth

sen ground.

Connect the grounding strap to the

cilloscope ground, or to the same ground

os circuit that the oscilloscope is connected to.

TBS2000 Series User Manual 13

Getting acquain

ted with the oscilloscope

Doing a functional check

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

1. Connect the oscilloscope power cable as described in Powering On the Oscilloscope. (See page 7.)

2. Power on the oscilloscope.

3. Connect a probe that came with the

oscilloscope to channel 1.

4. Connec

5. Push Default Setup. Default Setup

t the probe tip and ground lead to the PROBE COMP connectors on the oscilloscope front panel. The probe

nectstothe5Vconnector, and

tip con the ground clip connects to the ground connector.

returns the oscilloscope settings to factory default values. (See page 112,

The default oscilloscope settings (Default Setup).)

14 TBS2000 Series User Manual

6. Push Autoset.

The screen displays a square wave.

Getting acquain

ted with the oscilloscope

If the displayed square wave tops are not ﬂat, perform the procedures to compensate the probe high frequency response. You can compensate the probe after completing this functional check. (See page 17.)

7. Push Measure to open the

Measurement Selection menu.

TBS2000 Series User Manual 15

Getting acquain

ted with the oscilloscope

8. Turn the Multip Snapshot.

9. Click the Multipurpose knob to show the Snapshot screen.(See page 51, Ta ki n g

a measurements snapshot.)

Verify that the Freq uen cy value is ~1 kHz and the Period valueis~1ms, respectively.

10. Push the Menu On/Off button to close the

Menu On/Off button again to close the Measurement screen.

urpose knob to select

Snapshot screen. Push the

What is Autoset?

The functional check used the Autoset button to display a stable waveform. Autoset automatically adjusts the oscilloscope acquisition, horizontal, trigger, and vertical controls to display ﬁve or six waveform cycles for an active (displayed) channel. This powerful function can save you time when you need to view an unknown signal. See the Autoset topic for more information.(See page 40, Using Autoset.)

16 TBS2000 Series User Manual

Compensating a passive voltage probe

Probe compensation adjusts a passive (nonampliﬁed) voltage probe for the most accurate high-frequency response. The oscilloscope has a 1 kHz square wave source for compensating the probe. Because a square wave contains a signiﬁcant number of harmonics (multiples of the fundamental frequency), it is an ideal signal source for adjusting the high frequency response of a probe.

A rounded leading edge on the square wave means that the high frequency response of the probe is too low. A spike on the leading edge means that the high frequency response is too high and must be reduced. A square leading edge means that the frequency response is c orrect for the probe.

Whenever you attach a passive voltage probe for the ﬁrst time to any input channel, or change a passive probe from one channel to another, you must compensate the probe to match it to that input channel.

To properly compensate your passive probe:

1. Power on the oscilloscope.

2. Connect the probe that shipped with the

instrument, or other passive probe, to an oscilloscope channel.

Getting acquain

ted with the oscilloscope

3. Connect the probe tip and ground lead

to the PROBE COMP connectors on the

loscope. The probe tip connects to

oscil the 5 V connector, and the ground clip connects to the ground connector.

TBS2000 Series User Manual 17

Getting acquain

4. Push Default Setup.

5. Push the Vertical Menu button for the

6. Push Autoset.

ted with the oscilloscope

channel to which the probe is connected, to display that channel.

The screen displays a square wave.

18 TBS2000 Series User Manual

7. Check the shape of the displayed

waveform to determine if the probe needs adjuste

d. If the waveform has a square leading edge and a ﬂat top and bottom, the probe does not need adjusted.

Getting acquain

ted with the oscilloscope

If the wavef

orm leading edge is rounded or has a spike, you need to adjust the probe compensation.

8. Use the probe adjustment tool to adjust the probe to show a ﬂat top and bottom to the waveform. Remove the adjustment tool before looking at the waveform. Repeat until waveform top and bottom are ﬂat.

9. Repeat this procedure from step 5 for each probe connected to each channel. You must also run this procedure if you move a probe from one channel to another.

Probes and ground leads tip

When taking a real measurement, use the shortest possible ground lead and signal path to minimize probe-induced ringing and distortion on the measured signal.

Signal with a short length ground lead

Signal with a long ground lead

TBS2000 Series User Manual 19

Getting acquain

ted with the oscilloscope

Signal path compensation (SPC)

Signal Path Compensation (SPC) corrects for DC level inaccuracies in the internal signal path caused by temperature variations and/or long-term signal path drift. You should run the SPC whenever the ambient (room) temperature has changed by more than 10 °C, or once a week if you use vertical scale settings of 5 mV per division or less. Failure to run a SPC may result in the oscilloscope not meeting w arranted performance levels at those volts per division settings.

To compensate the signal path for all channels:

1. Power on and warm up the oscilloscope for at least 20 minutes.

2. IMPORTANT: Remove all input signals (probes and cables) from channel inputs and the Aux Out connector on the back of the oscilloscope.

3. Push Utility.

4. Push the -More- Page 1/2 side-menu button.

5. Push th

6. Turn the Multipurpose knob to select Signal Path, then click the Multipurpose knob to start the SPC process.

7. Push the Compensate Signal Paths side-menu button to start the process.

8. Push

9. Reco

e Calibration side-menu button.

illoscope shows a Signal Path Compensation information message.

The osc

reen shows rotating dots while the SPC is run. The oscilloscope displays a message when the SPC is complete.

The sc SPC can take several minutes to run, so wait until the oscilloscope shows a message that SPC is completed.

Menu Off to remove the message and menus.

nnect probes to the oscilloscope.

20 TBS2000 Series User Manual

Getting on-screen help for settings: Help Everywhere

Help Everywhere is a mode that displays graphics and short text descriptions when you access the menus for most

oscilloscope settings. This is very useful for when you are ﬁrst learning the functions of oscilloscope controls.

You c an enable Help Everywhere content for all supported settings, or enable it for speciﬁc function groups, such as Trigger controls, Vertical controls, and so on.

Getting acquain

ted with the oscilloscope

1. Push the Function front-panel button.

2. Push th

e Help Everywhere side-menu button to display the menu. All Help Everywhere content is set to Off by

lt except for the Measurement

defau category, which is On.

TBS2000 Series User Manual 21

Getting acquain

ted with the oscilloscope

3. To t u rn all Help or off, use the Multipurpose knob to select Set All to On or Set All to Off, then click the

4. To set individual menu categories to show Help Everywhere,usethe

Multipurpo

then click the knob to toggle that selection On or Off.

ThenexttimeyouaccessaHelp Everywhere-supported menu setting, the oscilloscope displays the help for that item.

Everywhere content on

knob.

se knob to select a c ategory,

NOTE. You may need to turn the

Multipurpose knob and select another menu item to show the Help Everywhere content.

When any Help Everywhere content is enabled, the Help Everywhere icon is highlighted (in upper right corner of screen).

22 TBS2000 Series User Manual

The Scope Intro function

The Scope Intro function provides a brief history of oscilloscopes, some basic oscilloscope concepts, and an overview of the oscilloscope features and controls.

You can view any topic in any order.

1. Push the Function front-panel button.

2. Push the Scope Intro side-menu button.

3. Use the Multipurpose knob to select and click a topic heading.

4. Use the Multipurpose knob to select and click a topic to read.

5. Push the relevant side-menu button to return to the menu for the subject category, and select and click the next topic

to view.

Getting acquain

ted with the oscilloscope

6. When you

menu, and select a new category to read.

7. Push the Menu On/Off button to close the Scope Intro mode.

NOTE. The Scope Intro function does not remember which topics you have read.

are done viewing the topics for that category, push the Scope Intro side-menu button to return to the main

TBS2000 Series User Manual 23

Sampling oscill

oscope concepts

Sampling osci

Read this section if you are a new oscilloscope user, or are new to using a digital oscilloscope.

lloscope concepts

Sampling and acquisition concepts

Before the oscilloscope can display or measure a signal, it must be sampled. Sampling is the process of measuring the input signal amplitude value at regular intervals (called the sampling rate, in samples per second), converting the sampled levels into the digitized values in the waveform record to create, display, and measure waveforms. Each oscilloscope channel has its own waveform record memory storage.

TBS2000 Series oscilloscopes use real-time sampling. In real-time sampling, the oscilloscope samples and digitizes all of the sampled points at one time, in sequence, stores the sampled data in memory, and then repeats the sampling and storage process.

digital data, and storing the sampled values in memory to create a waveform record. The oscilloscope uses

You u s e the Horizontal Scale knob to change the sample rate (samples per second). The oscilloscope automatically sets the sample rate so that there are more than enough samples to accurately capture the signal information. The sample rate is shown on the screen at all times in the horizontal position/scale readout. See item 11 in The graphical user elements section.

NOTE. The maximum sample rate of 1 GS/s is only available when one channel per channel pair is active (channel 1, 2

pair or channel 3, 4 pair).

For two-channel models, only one channel (either channel 1 or 2) can sample at 1 Gs/s. If channel 1 and 2 are both active, then the maximum sample rate changes to 500 MS/s.

On four-channel models, only two channels can sample at 1 GS/s (one channel from each pair). So if channel 1 or 2, and channel 3 or 4, are active, the maximum sample rate is available. Turning on a 3rd channel (in either pair) changes the maximum sampling rate to 500 MS/s.

You can set the waveformrecord length (number of sample points in the waveform record) from 2000 points to 20 m illion points (20M). A longer (larger) waveform record is useful to capture several waveform cycles to search for a waveform of interest, o r to capture a great deal of detail for just a few waveform cycles and then use the Zoom function to search the waveform for areas of interest.

Each time the oscilloscope ﬁlls the waveform record is called a waveform acquisition,oracquisition for short. Acquisitions happen up to 10,000 times a second, for all channels. Each acquisition stores new sample data into the same waveform record for that channel.

A waveform record is further divided into acquisition intervals, w hich are equally sized groups of samples. Acquisition intervals let the oscilloscope perform calculations to analyze and display data such as the minimum and maximum data values per interval, or the average signal value per interval. H ow the values in the acquisition interval are used is set by the acquisition mode.

24 TBS2000 Series User Manual

Sampling oscill

oscope concepts

Acquisition mode concepts

The acquisition mode sets how the oscilloscope uses the sampled data points in each acquisition interval to create and display a waveform. You can set the acquisition mode to one of the following modes.

Sample mode retains and uses the ﬁrst sampled point from each acquisition interval to create the displayed waveform. This is the default mode.

Peak Detect mode uses the highest and lowest of all the samples contained in two consecutive acquisition intervals. Use this mode to help detect short rapid transitions in a waveform.Peak Detect is not available at faster time per division settings.

Hi Res mode oversamples lower-frequency signals and calculates the average of all the samples for each acquisition interval. Use Hi Res mode to provide higher-resolution (16-bit) sample points for lower-frequency waveforms.

Average mode calculates and displays the average value for each sample point over a user-speciﬁed number of acquisitions. Use Average mode to reduce random noise.

TBS2000 Series User Manual 25

Sampling oscill

oscope concepts

Trigger concepts

The oscilloscope uses the data in the waveform record to construct and display a waveform on the oscilloscope screen. However, as the oscilloscope is constantly acquiring samples into the waveform record, each waveform record starts at a random point of the input signal. This means that the w aveform record sample values are constantly changing, which results in a displayed waveform that is unstable or jittering. An unstable waveform cannot be accurately measured, making this display useless except for very broad measurements (type of signal, approximate peak to peak signal amplitude).

Untriggered display

What is needed is a way to set the oscilloscope to detect, or trigger on, the same signal condition or state on the input signal for each waveform acquisition, and store the samples in the waveform record such that the same signal condition is at the s ame sample time location in the waveform record.

A trigger sets when the oscilloscope detects a deﬁned waveform condition, such as at a speciﬁed signal voltage level on the rising edge of the signal. The oscilloscope uses that trigger condition to store the waveform samples in the waveform record so that the signal sample point that meets the trigger condition is at the same location in the waveform record. When displayed, the waveform record for each acquisition shows the waveform at the same trigger point, resulting in a stable waveform on the screen.

Triggered display

Understanding and using triggers is p robably the most important skill needed to quickly display and analyze waveforms. A trigger condition can be as simple as when the signal passes through a speciﬁed voltage level w hen going from a low level to a high level (positive slope). A trigger condition can also be v ery speciﬁc, such as when the signal level is falling and the width of a single pulse of the signal is less than a speciﬁed time period.

The trigger point in a waveform record also sets the zero time-reference point in a waveform record. By default, the trigg point in a waveform record is in the center of the w aveform record. This means that half of the record shows the signal waveform before the trigger condition (pretrigger), and the other half shows the waveform after the trigger condition (post-trigger).

26 TBS2000 Series User Manual

Sampling oscill

Pretrigger data can help you troubleshoot signal problems. For example, to ﬁnd the cause of an unwanted glitch in your test circuit, trigg uncover information that helps you ﬁnd the source of the glitch.

er on the glitch signal and look at the pretrigger waveform. By analyzing what happens before the glitch, you may

oscope concepts

Trigger slope and level concepts

The oscilloscope must detect both the slope and level conditions before it can trigger and display a stable waveform.

The minimum trigger conditions needed to display a stable waveform are the signal slope and threshold level. The slope sets the oscilloscope to ﬁnd the trigger point on the rising or the falling edge of a signal. The level sets where on that edge the trigger point occurs.

The trigger Slope sets the oscilloscope to ﬁnd the trigger event on the rising or the falling edge of a signal.

The trigger threshold Level (or just level) is the signal amplitude value on a slope that must occur for the oscilloscope to trigger on a signal.

A runt trigger needs two thresholds to deﬁne the two levels that a signal must pass through to be considered a valid (nonrunt) signal.

The arrow at the far right of the screen marks the threshold level(s) for that signal.

Turning the Trigger Level knob changes the threshold level and momentarily displays a long horizontal line (or two lines for a runt trigger) across the waveform to show the trigger level(s) in relation to the overall waveform.

Available trigger types

oscilloscope lets you trigger on several signal conditions:

The

TBS2000 Series User Manual 27

Sampling oscill

Trigger type Trigger conditions

Edge Edge triggers are the simplest and most commonly used trigger

oscope concepts

type. An edge trigger event occurs when the trigger source passes through a spec is transitioning in the speci ﬁed slope (rising or falling).

You can trigger on a rising or falling edge, as deﬁned by the slope control.

iﬁed voltage threshold (trigger level) when the signal

Pulse Width

Runt

Trigger

Trigger coupling sets what part of the input signal is used by the trigger circuit. Trigger coupling choices are DC, LF Reject, HF Reject, and Noise Reject.

coupling

DC Cou pling passes the trigger signal to the trigger circuit with no ﬁltering. The scope may trigger on false events if

the signal is noisy.

You can trigger on pulses that are less than, greater than, equal to, or not equal to a speciﬁed time period. You can trigger on positive or negative p

Pulse width triggers are primarily used to analyze digital signals.

A runt puls a second threshold before recrossing the ﬁrst. Therefore, a runt trigger needs two thresholds to deﬁne the two levels that a signal must pass

You can trigger on any positive or negative (or either) runt signal. You can also trigger on runt signals with pulse widths that are less than, gre

Runt triggers are primarily used to analyze digital signals.

ulses.

e is a pulse that crosses one threshold but fails to cross

through to be considered a valid (nonrunt) signal.

ater than, equal to, or not equal to a speciﬁed width.

HF Reject blocks signals above 85 kHz from the trigger circuit. This reduces false triggering on high-frequency noise when measuring lower-frequency signals.

LF Reject blocks signals below 65 kHz from the trigger circuit. This reduces false triggering from low frequency noise when measuring higher-frequency signals.

Noise Reject reduces the trigger circuit input sensitivity. This reduces false triggering when measuring signals with higher levels of noise.

Trigger modes

The Trigger Mode sets how the oscilloscope behaves in the absence or presence of a trigger. Trigger mode also enables

trigger holdoff function.

the

Auto (Untriggered Roll) trigger mode. The Auto (Untriggered Roll) mode sets the oscilloscope to acquire a

waveform even if a trigger does not occur. Auto mode uses a timer that starts when the acquisition is started, and the pretrigger information is obtained. If a trigger event is not detected before the timer times out, the oscilloscope forces a trigger. The length of time it waits for a trigger event depends on the time base setting (Horizontal Scale).

28 TBS2000 Series User Manual

Sampling oscill

Auto mode, when forcing triggers in the absence of valid triggering events, does not synchronize the waveform on the display. The wa

veform will appear to roll across the screen. If valid triggers occur, the display will become stable.

oscope concepts

Normal trigger mode. Normal mode sets the oscilloscope to acquire a waveform only when a trigger condition occurs.

If no trigger occurs, the last waveform record acquired remains on the display. If no last waveform exists, no waveform is displayed.

Holdoff trigger mode. The Holdoff trigger mode lets you set a time period during which the oscilloscope ignores trigger

events. For e edge, and set the holdoff value so that the trigger is disabled for a period of time after the trigger event but before the next bust occurs. Using Holdoff in this case prevents the oscilloscope from triggering on any positive signal edge.

Use Set Holdoff to minimum to set the holdoff value to the minimum value.

xample, to trigger on the ﬁrst pulse of a pulse burst, you would set the trigger conditions to trigger on a positive

NOTE. The trigger mode does not set the trigger c onditions; those are set with the trigger Type controls. (See page 27,

Available trigger types.)

Trigger delay (acquisition mode)

mal acquisition modes, the trigger point is located at the center of the waveform record, and is positioned at the

In nor center-screen expansion point so that horizontal scale changes are centered around the trigger point. The Delay function in the Acquire menu disconnects the trigger point from the center-screen expansion point. This feature lets you use the

ontal Position knob to reposition (delay) the trigger point from the expansion point by a speciﬁed amount.

Horiz

st commo n use for Delay is to acquire and display w aveform detail that is separated after the trigger event by a

The mo signiﬁcant interval of time. For example, you can trigger on a pulse that occurs once every 10 ms and then use Delay to look at the signal characteristics that occur 6 ms after the trigger point.

TBS2000 Series User Manual 29

Setting channel

input parameters

Setting chann

Use the vertical Menu buttons to select waveforms to display or open menus and submenus with which to s et input parameters for each channel.

Each channel’s settings are independent of every other channel.

el input parameters

Setting input signal coupling

Input signal coupling sets how the input signal is passed to the oscilloscope sampling circuit.

1. Push the Ver channel input that you want to set.

2. Push the Coupling side-menu button.

3. Use the Multipurpose knob to select and click the coupling type:

DC coupling passes both AC and DC signal components.

AC coup

tical Menu button for the

ling blocks the DC component and passes only the AC signal.

Inver

Ground internally disconnects the input signal and connects that channel to a ground reference. This is a fast way to

ine where the ground level is for signals that have a DC component or offset.

determ

ting the input signal

Use this procedure to invert (ﬂip vertically) the signal. A typical reason to invert a signal is to use the inverted signal to create a math waveform.

1. Push the Vertical Menu button for the channel input that you want to set.

2. Push the Invert side-menu button to toggle between Off for normal operation and On to invert the polarity of the signal in the preampliﬁer.

30 TBS2000 Series User Manual

Setting the oscilloscope bandwidth

Use this procedure to set the oscilloscope bandwidth. Bandwidth is the maximum frequency that an oscilloscope can accurately display and measure. The oscilloscope gradually attenuates (reduces) the signal level of frequencies that are higher than the bandwidth. This means that although you can display signals that are above the bandwidth limit, their amplitude values and other characteristics are not guaranteed to be accurate.

1. Push the Vertical Menu button for the

channel input that you want to set.

2. Push the Bandwidth side-menu button.

3. Use the Multipurpose knob to select and click the bandwidth setting.

Full sets the bandwidth to the maximum bandwid th of which the oscilloscope is capable.

20 MHz sets the bandwidth to 20 MHz.

Other bandwidth choices may be shown on the menu depending on the connected probe.

Setting channel

input parameters

Setting the probe type (voltage or current)

The Probe Type submenu sets the type for probe that is connected to the oscilloscope. The default probe type is Volt age.

er valid probe type is current. Probes that have a TekProbe II or TekVPI interface automatically set the probe type

The oth and related parameters when you plug them into the oscilloscope.

1. Push the Vertical Menu button for the

el input that you want to set.

chann

2. Push the Probe Setup side menu to display the Probe Setup submenu.

3. Use the Multipurpose knob to select and click Probe Type submenu item.

4. Select and click the probe type (Voltag e or Curren t).

TBS2000 Series User Manual 31

Setting channel

input parameters

Setting the probe attenuation factor

Attenuation is the amount that the probe reduces or ampliﬁes the input signal amplitude before sending it to the oscilloscope input. The Attenuation submenu sets the probe attenuation factor for probes that do not have the TekProbe II or TekVPI interface. The default attenuation is 10x.

1. Push the Vertical Menu button for the channel input that you want to set.

2. Push the Probe Setup side menu to display the Probe Setup submenu.

3. Use the Multipurpose knob to select and click the Attenuation submenu item.

4. Use the Multipurpose knob to select and change the attenuation factor.

Quickly setting the probe attenuation to 1X or 10X

The Set To 1X and Set To 10X submenu items let you quickly set the probe attenuation to either 1X or 10X.

1. Push the Vertical Menu button for the

channel input that you want to set.

2. Push the Probe Setup side menu to display the Probe Setup submenu.

3. Use the Multipurpose knob to highlight either Set To 1X or Set To 10X submenu item. Then click the multipurpose

knob to set that value.

Setting the Measure Current mode for voltage probes

If you are measuring current by using a standard voltage probe to measure the voltage drop across a resistor, use the Measure Current ﬁeld to set the Amps/Volts or Volts/Amps ratio of your measurement setup. For example, if you are measuring the voltage drop across a 2  r

1. Push the Vertical Menu button for the channel input that you want to set.

esistor to determine the current, set the V/A ratio to 2.

2. Push the Probe Setup side menu to display the Probe Setup submenu.

32 TBS2000 Series User Manual

3. Use the Multipurpose knob to highlight the Measure Current submenu item.

4. Push the Multipurp ose knob to toggle between Yes and No.

5. If you select Yes, the area below the Measure Current submenu displays the Amps/Volts or Volts/Amps ratio menu item.

Use the Multipurpose knob to select and change the current measurement parameter.

Setting the input signal vertical offset

The Offset menu lets you set the vertical signal offset, which changes the waveform position relative to the oscilloscope ground (0 volts) reference. This menu also lets you quickly set a signal’s vertical offset to 0. (See page 34, The difference between vertical position and vertical offset.)

1. Push the Vertical Menu button for the

channel input that you want to set.

2. Push the Offset side-menu button.

Setting channel

input parameters

3. To set a speciﬁc offset voltage, use the Multipurpose knob to select and click the offset value ﬁeld. Use the knob to change

the value; the w aveform on the screen moves as you change the value. Click the knob again to exit the ﬁeld.

4. To set the offset value to 0, use the Multipurpose knob to select and click Set to 0.

Setting the waveform vertical position

To quickly position a waveform position, use the Vertical Position knob on the front panel for the c hannel that you want to

move

osition submenu lets you set the vertical s ignal position, which moves the waveform up or down on the screen.

The P This menu also lets you quickly set the waveform 0 (ground) value to the center horizontal graticule. (See page 34, The difference between vertical position and vertical offset.)

htheVertical Menu button for the

1. Pus

channel input that you want to set. Each channel’s settings are independent of the

er channels.

oth

2. Push More side-menu button.

3. Use the Multipurpose knob to select and click Position to show the Position submenu.

4. To set a speciﬁc position value, use the Multipurpose knob to select and click the position ﬁeld. Use the knob to change

the value; the w aveform on the screen moves as you change the value. Click the knob again to exit the ﬁeld.

TBS2000 Series User Manual 33

Setting channel

input parameters

5. To set the position to 0 (center graticule), use the Multipurpose knob to select and click Set to 0.

The difference between vertical position and vertical offset

Vertical position is a display function that moves the waveform image on the screen. Moving the signal on the screen does not change the ground (0 volt) baseline level for that signal.

Vertical offset is a signal function that adds a DC voltage to the input signal before the oscilloscope preampliﬁer. Adding this DC voltage moves, or offsets, the signal from the ground (0 volts) level. You use offset to increase the effective dynamic range of a signal.

For example, you can set the vertical offset to match the peak area of a signal, use the Vertical Position knob to move the peak area to the center graticule, and then set the Vertical Scale knob to smaller voltage/division settings to look at more detail in that waveform peak area.

Setting channel deskew

Deskew co

adjust the signal delay for individual channels so that all signals arrive at the oscilloscope at the same time. Deskewing channels lets you take accurate time-related measurements between two or more channels, or when using a current probe wi

Select o results, use a deskew ﬁxture, such as the Tektronix 067-1686-xx.

The following image shows before and after using deskew to set channel 2 and 4 deskew to minimize the delay with channel 1.

1. Push the Vertical Menu button for the

mpensates for differences in signal delays bet ween different cable lengths or probe types. Use Deskew to

th a voltage probe.

ne probe as a reference signal and adjust the deskew values for the other channels so that they all align. For best

channel input that you want to set.

2. Push the More side-menu button.

3. Use the Multipurpose knob to select and click Deskew.

4. To set a speciﬁc deskew delay, use the Multipurpose knob to select and click 0s. Then use the knob to change and set the

value. The waveform on the screen moves as you adjust the value.

34 TBS2000 Series User Manual

Setting channel

5. To set the deskew to the oscilloscope default (0 delay), use the Multipurpose knob to select and click Set to Default.

input parameters

Deskew tips

Deskew settings are stored in nonvolatile memory until changed manually for each channel.

Deskew settings are included in saved setup ﬁles.

Doing a Default Setup resets deskew v alues to 0 on all channels.

TBS2000 Series User Manual 35

Trigger setup

Use these procedures to set up the oscilloscope to trigger on a signal. (See page 26, Trigger concepts.)

Triggering on a waveform edge

Use this procedure to set the oscilloscope to trigger on the rising or falling edge of a w aveform.

1. Push the Tri

2. Push the Type side-menu button.

3. Use the Multipurpose knob to select and click Edge.

4. Push the Source side-menu button and use the M ultipurpose knob to select and click the channel to use as the trigger signal source, or select AC Line to use the AC power source frequency as the trigger signal.

5. Push the Coupling side-menu button and use the Multipur pose knob to select and click the trigger coupling. (See

page 28, Trigger coupling.)

6. Push the Slope side-menu button to select between rising and falling slope edges on which to trigger the oscilloscope.

7. Push the Level side-menu button and use the Multipu rp ose knob to select and click the trigger level entry method:

Click Level and use the Multipurp ose knob to manually set the trigger level.

gger Menu front-panel button.

Click Choose Preset and use the Multipurpose knob to set the trigger level to a predeﬁned signal logic family level

(TTL, CMOS, ECL, and so on) or to 0.

Click Set to 50% to set the trigger level to 50% of the signal peak-to-peak level.

NOTE. You can use the Trigger Level knob to immediately change the trigger level and momentarily display a long horizontal

line (or two lines for a runt trigger) across the waveform to show the trigger level(s) in relation to the waveform.

Push the Trigger Level knob to immediately set the trigger to 50% of the signal peak-to-peak level.

36 TBS2000 Series User Manual

Triggering on a speciﬁed pulse width

Use this procedure to set the oscilloscope to trigger on a speciﬁed signal pulse condition. You can trigger when a pulse is less than, greater than, equal to, or not equal to a set time period ( width). The minimum pulse width setting is 1 ns. (See page 27, Available trigger types.)

Pulse width triggering is most often used to troubleshoot or analyze digital signals.

1. Push the Trigger Menu front-panel button.

2. Push the Type side-menu button.

Trigger setup

3. Use the Mul

4. Push the Source side-menu button and use the Multipurpose knob to select and click the channel to use as the trigger

signal so

5. Push the Polarity side-menu button and use the Multipurpose knob to select and click the pulse polarity (positive

or negat

6. Push the Threshold side-menu button and use the Multipurpose knob to select and click the trigger level entry method:

Click t

Click Choose Preset and use the Multipurpo se knob to set the trigger level to a predeﬁned signal logic family l evel

(TTL,

Click Set to 50% to set the trigger level to 50% of the signal peak-to-peak level.

7. Push

which to trigger. Then use the Multipurpose knob to enter the pulse width time parameter.

tipurpose knob to select and click Pulse Width.

urce, or select AC Line to use the AC power source frequency as the trigger signal.

ive) to trigger on.

he threshold ﬁeld and use the Multipurpose knob to manually set the trigger level.

CMOS, ECL, and so on) or to 0.

the Trigger When side-menu button and use the Multipurpose knob to select and click the pulse width condition on

TBS2000 Series User Manual 37

Trigger setup

Triggering on a runt pulse

Use this procedure to set the oscilloscope to trigger when a runt pulse occurs. You can also trigger when a runt pulse is less than, greater than, equal to, or not equal to a set time period (width).

A runt pulse is a pulse that crosses one threshold level but fails to cross a second threshold before recrossing the ﬁrst. Therefore, a runt trigger needs two threshold levels to deﬁne the two levels that a signal must pass through to be considered a valid (nonrunt) signal. (See page 27, Available trigger types.)

Runt pulse triggering is most often used to troubleshoot or analyze digital signals.

The minimum runt pulse width setting is 1 ns.

1. Push the Trigger Menu front-panel button.

2. Push the Type side-menu button.

3. Use the Mu

4. Push the Source side-menu button and use the M ultipurpose knob to select and click the channel to use as the trigger

signal s

5. Push the Polarity side-menu button and use the Multipurpose knob to select and click the runt pulse polarity (positive, negativ

6. Push the Thresholds side-menu button and use the Multipurpose knob to select and click the trigger levels (thresholds) to use to d

Click High and use the Multipurpose knob to manually set the level that deﬁnes a valid high signal threshold level.

Click Low and use the Multipurpose knob to manually set the level that deﬁnes a valid low signal threshold level.

Clic

7. Pus any runt event. If triggering on a runt width, use the Multipurpose knob to select and click the runt pulse width condition to test for, and enter the runt width time parameter.

ltipurpose knob to select and click Runt.

ource, or select AC Line to use the AC power source frequency as the trigger signal.

e, or either) to trigger on.

etect a runt pulse:

k Choose Preset and use the Multipurpose knob to set the trigger threshold levels to predeﬁned signal logic family

levels (TTL, CMO S, ECL, and so on) or to 0.

htheTrigger When side-menu button and use the M ultipu rpose knob to select and click Runt Occurs to trigger on

38 TBS2000 Series User Manual

Setting the trigger mode

Use this procedure to set the oscilloscope trigger Mode. The trigger mode sets how the oscilloscope behaves in the absence or presence of a trigger. Trigger mode also enables the trigger holdoff function. (See page 28, Trigger modes.)

Trigger mode does not set the trigger conditions; those are set with the Trigger Type side-menu buttons.

1. Push the Trigger Menu front-panel button.

2. Push the Mode side-menu button.

Trigger setup

3. Use the Mul

Click Auto (Untriggered Roll) to set the oscilloscope to acquire and display a waveform even if a trigger does not

occur. If (Untriggered Roll) trigger mode.)

Click No

page 29, Normal trigger mode.)

Click H

the holdoff period is over, the oscilloscope starts looking for the trigger condition. The minimum holdoff period is 20 ns. (See page 29, Holdoff trigger mode.)

tipurpose knob to select and click a trigger mode or holdoff mode:

there is no valid triggering event, the waveform will appear to roll across the screen.(See page 28, Auto

rmal to set the oscilloscope to acquire and display a waveform only when a valid trigger event occurs. (See

oldoff to set a time period after a trigger event, during which the oscilloscope ignores new trigger events. Once

TBS2000 Series User Manual 39

Acquisition set

Acquisition setup

This section describes procedures for setting the oscilloscope acquisition parameters.

Using A utoset

Autoset is a fast way to acquire and display a waveform. Autoset automatically sets the trigger type to edge, sets the

threshold le and vertical settings to display ﬁve to six waveform cycles. Autoset is ideal for quickly displaying a repeating signal waveform.

1. Connect a probe to the oscilloscope and

vel to 50% of the signal level, and analyzes the input signal and adjusts the oscilloscope acquisition, horizontal,

signal sour

ce.

2. Push the Ve

channel input that you want to Autoset,to enable that channel.

3. Push Auto

few moments to analyze and display the signal.

4. You can push the Undo Autoset side-menu

button to

rtical Menu button for the

set. The oscilloscope takes a

undo the last Autoset.

Autoset tips

If more than one channel is active, Autoset triggers on the lowest-numbered displayed channel, and displays all active channels from the top to the bottom of the screen.

Autoset always sets vertical offset to 0 V.

Channel 1 is a special case: If all channels are off (not displayed), or channel 1 is on, Autoset attempts to detect, trigger, and display the waveform for channel 1 even if no signal is present (resulting in a ﬂat waveform for channel 1). It will not trigger on, or display the other channels, even if there are signals present on those channels.

How to disable Autoset in the os cilloscop e

You can disable the Autoset button to require setting the oscilloscope controls manually to display a waveform.

E. To disable or enable the Autoset function requires a password. The default factory password is 000000.

NOT

NOTE. An instructor in a TekSmartlab™-equipped education lab can enable or disable Autoset from the TekSmartLab

application, for all connected oscilloscopes.

40 TBS2000 Series User Manual

Acquisition set

1. Push Utility.

2. Push -M ore- P age 1/2 side-menu button.

3. Push Autoset Enable side-menu button.

4. Use the Multipurpose knob to select and click Autoset Enable. The oscilloscope opens the Autoset Enable password

entry screen.

5. Use the Multipurpose knob and side-menu buttons to enter the password that lets you disable Autoset. The factory default password is 000000

6. Push OK side-menu button to enter the password and let you disable Autoset.

How to change the Autoset password

Use this procedure to change the Autoset Enable/Disable password. Autoset requires a password to enable or disable the Autoset mode.

1. Push Utility.

2. Push -More- Page 1/2 side-menu button.

3. Push Autoset Enable side-menu button.

4. Use the Multipurpose knob to select and click Change Password. The oscilloscope opens the Change Password

entry screen.

5. Use the Multipurpose knob and side-menu buttons to select alphanumeric and enter characters for the current password. Then push the OK side-menu button. The factory default password is 000000.

6. Use the Multipurpose knob and side-menu buttons to enter the new password. Then push the OK side-menu button. Reenter the new password to conﬁrm it and push the OK side-menu button.

TBS2000 Series User Manual 41

Acquisition set

Starting and stopping an acquisition

After you have deﬁned the acquisition and trigger parameters, start acquiring and displaying a waveform with the Run/Stop or Single controls.

Push Run/Stop to start acquisitions (button turns green). The oscilloscope acquires repeatedly until you push the button again to stop the acquisition, or push the Single button.

Push Single to take a single acquisition.

Single sets the trigger mode to Normal for the single acquisition.

Setting the acquisition mode

Use the a and display a waveform. (See page 25, Acquisition mode concepts.)

1. Push Acquire.

2. Push the Mode side-menu button.

3. Turn the Multipurpose knob to select a mode (Sample, Peak Detect, Hi res, Average), then click the M u ltipurpose

4. If you selected Average,usetheMultipurpose knob to select and set how many acquisitions to average to create

cquisition mode to set how the oscilloscope uses the sampled data points in each acquisition interval to create

knob to enable that mode.

the waveform.

42 TBS2000 Series User Manual

Setting the acquisition trigger delay time

1. Push Acquire.

2. Push the Delay side-menu button to toggle

between On and Off. When set to Off,the expansion point is tied to the trigger point so that horizontal scale changes are centered around the trigger point.

3. With Delay set to On, the trigger point is disconnected from the expansion point. Turn the Horizontal Position knob to move the trigger point away from the expansion point (center graticule). The amount of delay is shown in the Horizontal Status area at the bottom-center of the graticule, referenced to 0 s (center graticule).

The trigger point can move off the screen; when this happens, the trigger marker changes to show the direction of the trigger point.

Acquisition set

Trigger point is off-screen (delay time shown on readout at bottom of the screen)

4. Once you are displaying a waveform area of interest at the center of the screen, adjust the Horizontal Scale knob to acquire more points for the area of interest, and use the controls to view more detail.

TBS2000 Series User Manual 43

Acquisition set

5. Push the Set Horizontal Position to 0s side-menu button to return the trigger point to the center of the waveform record

You can also pu

Trigger Delay is different than Trigger Holdoff. (See page 29, Holdoff trigger mode.)

(setting delay to 0). Pushing this button does not turn off the delay mode.

sh the front-panel Horizontal Position knob to return the trigger point to the center of the waveform record.

Setting the r

Use this procedure to set the record length. The record length sets how many samples (data points) are added to a waveform record. Available record lengths are 2000; 20,000; 200,000; 2 million (2M); and 20 million (20M) points.

NOTE. 20M waveforms cannot be loaded into reference memory, either directly from the oscilloscope or from a saved ﬁle.

All other record length waveforms can be l oaded into reference memory.

1. Push Acquire.

2. Push the

3. Use the Multipurpose knob to select and set the record length.

Use longer record lengths to either capture more sa capture more cycles of a waveform, then use the Zoom controls to investigate the wavefo

ecord length

Record Length side-menu button.

mples for a waveform record, or

rm in more detail.

Maximum Zoomed waveform record captured with 2000 points

44 TBS2000 Series User Manual

Acquisition set

Using the r

Roll mode gives a display similar to a strip chart recorder, in that the waveform moves slowly, or rolls, from right to left on the screen. Roll mode is used to display low-frequency signals. Roll mode lets you see acquired data points w ithout waiting for the acquisition of a complete waveform record.

Roll mode is not a button- or menu-selected mode, but is present when the trigger mode is Auto and the horizontal scale and record lengths are set as follows:

Table 1: Roll mode is e nabled when:

Horizontal scale setting Record length (number of samples)

40 ms/div

400 ms/div

Roll mode tips

Push Run/Stop to halt Roll mode.

Role mode is disabled under the following conditions:

oll display mode

Maximum Zoo

2000, 20k, 200k, 2M

20M

med waveform record captured with 2 million points

When using Reference, Math,orFFT waveforms

Using the Zoom function

Taking measurements (Measure menu)

Change to Normal trigger mode

Set the horizontal scale to 20 ms/division or faster (for 20M record lengths, it is 200 ms/division or faster)

Average acquisition mode is not available when you are using Roll mode

TBS2000 Series User Manual 45

Acquisition set

Setting the oscilloscope to factory default values (Default Setup)

Default Setup clears the current oscilloscope settings and loads factory-deﬁned settings. This lets you quickly reset the

oscilloscope to a known state before s etting up to take a new measurement.

(See page 112, The default oscilloscope settings (Default Setup).)

To return the oscilloscope to its factory default settings:

1. Push Default Setup.

2. If you chan

before you pushed Default Setup. You must push this button before doing any other action.

ge your mind, push Undo Default Setup side-menu button to return the oscilloscope to the settings present

46 TBS2000 Series User Manual

Waveform displa

y settings

Waveform disp

This section contains concepts and procedures for displaying and removing a waveform.

lay settings

Displaying and removing a waveform

Use this procedure to turn on or off the display of each channel’s waveform.

1. To add or remove a w aveform from the display, push the corresponding front-panel channel Menu button.

If the selected channel is already active, pushing the channel Menu button removes the waveform.

If the channel is not active, pushing the channel Menu button selects that channel; another push removes the waveform from the screen.

If more than one waveform is on the screen, selecting a channel draws the corresponding waveform on top of all other waveforms.

Setting the waveform persistence

Persistence sets the time for how long the oscilloscope retains and displays the sampled waveform points on the screen. Using longer or inﬁnite persistence times helps to display infrequent or random signal anomalies such as glitches.

Normal persistence sets the oscilloscope to erase the current waveform data as it draws the newest acquisition. Changing the persistence time (from 1 second to 10 seconds) set screen until they are erased. The older data points are erased ﬁrst.

Inﬁnite persistence sets the oscilloscope to retain and display all acquisition waveform data points without erasing the previous data.

Changing an acquisition setting, such as Horizontal Position or Scale, Autoset, and Single, resets the persistence period to start over.

1. Push Acquire.

2. Push Waveform Display side-menu button.

3. Use the Multipurpose knob to select and click Persist Time.

s how long to retain waveform data points in memory and on the

TBS2000 Series User Manual 47

Waveform displa

y settings

4. Use the Multipu rpo se knob to change and set the Persist Time value. The range is Auto (which is the same as 0 s), 0 s 10 s (in one second increments), and inﬁnity.

5. To clear the persistence of the displayed waveform, select and click Clear Persistence. This does not change the persistence setting, but just clears the displayed waveform persistence data.

Waveform persistence tip

To quickly clear the displayed waveform persistence data, push Single, then push Run/Stop to restart active w aveform acquisition.

The XY display mode

The XY dis is the horizontal axis and channel 2 is the vertical axis. XY display mode is useful for showing signal phase or frequency relationships between periodic signals. The resulting XY plots a re called Lissajou patterns.

You can display Ch 1 versus Ch 2. On four-channel models, you can also display Ch 3 versus Ch 4.

1. Select t

play mode plots the signal amplitude of channel 1 (X) against the amplitude of channel 2 (Y), where channel 1

he two signal sources that you want to plot. Push the Vertical Position knob for each channel to set the ground

ce of both signals to 0 V (center

referen horizontal graticule) so that the XY plot is centered on the screen.

48 TBS2000 Series User Manual

2. Push Acquire.

3. Push XY Display side-menu button to

toggle XY display mode On and Off.

Waveform displa

y settings

XY displa

available for measurements, and for saving to reference memory or a USB drive for off-line analysis.

ymodetips

Because the XY display is simply a different way of displaying pairs of wave forms, the underlying waveforms are

Use a Web browser and search on the keyword “lissajou patterns” to ﬁnd more information on XY plots.

Setting the backlight intensity

Use this procedure to change the overall screen lighting level. Higher settings are better for brightly lighted areas, and lower values are better for dimly lighted areas.

1. Push Utility.

2. Push the Display side-menu button.

3. Use the Multipurpose knob to select and click B ackligh t Intensity .

4. Use the Multipurpose knob to change and set the backlight value.

TBS2000 Series User Manual 49

Analyzing a wave

form

Analyzing a wa

After having properly set up the acquisition, triggering, and display of your waveform, you can then analyze the results. Select from features such as displaying automatic measurements, using cursors to measure speciﬁc parts of a waveform, using math to perform an operation on two waveforms, and using FFT to display the frequency components of a signal. You canalsouseGating to analyze only a speciﬁed part of a waveform when you take measurements. (See page 55, Ta k ing a measurement on just a part of the waveform (Gating).)

veform

Taking automatic measurements

Automatic measurements are a way to quickly take common measurements on a waveform, such as signal frequency, period, ris channels and a math waveform. The measurements are shown on the main screen in the order they were selected.

To take an automatic measurement:

1. Acquire and display a triggered waveform.

2. Push Meas

3. Push the s

e and fall times, and so on. You can take up to a total of six measurements at once, on any combination of input

ure.

ide-menu button to select the

channel on which to take measurements.

4. Use the Multipurpose knob to select and click a measurement. (See page 52, Automatic measurement descriptions.)

The Measurement Selection bar at the top of the screen updates to show that a measurement was selected for that channel (indicated by color), up to a maximum of six measurements total to display.

5. Measurements with a down triangle contain a list of the input channels to use for that measurement when selected. Select and click the input channels. Then push the Menu On/Off button to clos e the list.

6. To unselect a measurement, highlight that measurement and click the Multipurpose knob. To deselect a measurement for a different channel than the current channel, push the side-menu button for the channel of the measurement, then use the knob to select and click the measurement to remove it.

7. To unselect all measurements, push the Remove All M easurem ents side-menu button.

8. To close the measurement menu and show

the selected measurements o n the screen, push the Menu On/Off button.

Measurements are shown on the screen. Pushing the Menu On/Off button also turns on or off showing the measurements on the screen.

50 TBS2000 Series User Manual

Automatic measurements tip

A symbol appears next to a measurement if a vertical signal clipping condition exists. Part of the waveform is above or below the upper or lower edge of the screen. Signal clipping causes inaccurate measurements. To obtain an accurate measurement, turn the Vertical Scale and Position knobs so that all of the waveform is on the screen.

Taking a measurements snapshot

The Snapshot measurement (in the Measurement menu) displays all single-c hannel measurements on one screen for a single acquisition of one channel. You can view the snapshot results and save a screen image of the snapshot measuremen

ts to a ﬁle.

Analyzing a wave

form

Totakeamea

1. Acquire and display a triggered waveform.

2. Push Measure.

3. Push the side-menu button of the channel for which to show the measurement snapshot. You can only take a snapshot

of one channel at a time.

4. Use the Multipurpose knob to select and click Snapshot. the snapshot screen opens immediately.

5. If the File Save button is set to save an

image, push the File Save buttontosave the snapshot image to a ﬁle. (See page 70,

Saving ﬁles to USB with the Save File button.)

6. Push the Menu On/Off button to close the Snapshot screen and return to the measurements menu.

surements snapshot:

Snapshot measurement tip

measurement snapshot does not mark a measurement if a vertical clipping condition exists. Clipping is where part of

The the waveform is above or below the display. To obtain a proper measurement snapshot, use the Vertical Scale and Position knobs to make all of the waveform appear in the display.

You can also use Gating to analyze only a speciﬁed part of a waveform when you take a measurement snapshot. (See

ge 55, Taking a measurement on just a part of the waveform (Gating).)

TBS2000 Series User Manual 51

Analyzing a wave

form

Automatic measurement descriptions

The following tables list the automatic measurements, grouped as shown on the measurements menu. Measurement descriptions can also be shown on the oscilloscope by enabling Help Everywhere (Function > Help Everywhere ). (See page 21, Getting on-screen help for settings: Help Everywhere.)

Frequency measuremen t descriptions

Frequency measurements

Measurement Description

Frequency

The ﬁrst cycle in a waveform or gated region. Frequency is the reciprocal of the period; it is measured in hertz (Hz) where one Hz is one cycle per second.

+Pulses

–Pulses

+Edges

–Edges

The number of positive pulses that rise above the mid reference crossing in the waveform or gated region.

The number of negative pulses that fall below the mid reference crossing in the waveform or gated region.

The number of positive transitions from the low reference value to the high reference value in the waveform or gated region.

The number of negative transitions from the high reference value to the low reference value in the waveform or gated region.

Time measurement descriptions

Time measurements

Measurement Description

Period

Rise Time

52 TBS2000 Series User Manual

The time required to complete the ﬁrst cycle in a waveform or gated region. Period is the reciprocal of frequency and is measured in seconds.

The time required for the leading edge of the ﬁrst pulse in the waveform or gated region to rise from the low reference value to the high reference value of the ﬁnal value.

Time measurements (cont.)

Measurement Description

Fall Time

The time required for the falling edge of the ﬁrst pulse in the waveform or gated region to fall from the high reference value to the low reference value of the ﬁnal value.

Analyzing a wave

form

DelayRR

DelayRF

DelayFR

DelayFF

Phase

+Width

–Width

+Du

The time between the mid reference (default 50%) amplitude point of the rising edge of two differe

This measurement requires inputs from two channels.

The time between the mid reference (default 50%) amplitude point of the rising edge of one waveform and the falling edge of a second waveforms. See also Phase.

This measu

Thetimeb one waveform and the rising edge of a second waveforms. See also Phase.

This measurement requires inputs from two channels.

The time between the mid reference (default 50%) amplitude point of the falling edge of one wave

This measurement requires inputs from two channels.

The amount of time that one waveform leads or lags another waveform, expressed in degrees, where 360° makes up one waveform cycle. See also Delay(RR, RF, FR, FF).

This m

Posit amplitude points of a positive pulse. The measurement is made on the ﬁrst pulse in the waveform or gated region.

Negative pulse width. The distance (time) between the mid reference (default 50%) ampl the waveform or gated region.

The ratio of the positive pulse width to the signal period expressed as a percentage. The duty cycle is measured on the ﬁrst cycle in the waveform or gated region.

nt waveforms. See also Phase.

rement requires inputs from two channels.

etween the mid reference (default 50%) amplitude point of the falling edge of

form and the falling edge of a second waveforms. See also Phase.

easurement requires inputs from two channels.

ive pulse width. The distance (time) between the mid reference (default 50%)

itude points of a negative pulse. The measurement is made on the ﬁrst pulse in

–Duty

Burst Width

The ratio of the negative pulse width to the signal period expressed as a percentage. The duty cycle is measured on the ﬁrst cycle in the waveform or gated region.

The duration of a burst (a series of transient events) and is measured over the entire waveform or gated region.

Amplitude measu rement descriptions

TBS2000 Series User Manual 53

Analyzing a wave

Amplitude measurements

Measurement Description

Peak-to-peak

form

The absolute difference between the maximum and minimum amplitude in the entire waveform or ga

ted region.

Amplitude

Max

Min

High

Low

+Over This is measured over the entire waveform or gated region and is expressed as:

–Over This is measured over the entire waveform or gated region and is expressed as:

The average h or gated region.

The most positive peak voltage. Max is measured over the entire waveform or gated region.

The most negative peak voltage. Min is measured over the entire waveform or gated region.

This value is used as 100% whenever high reference, mid reference, or low reference values are needed, such as in fall time or rise time measurements. Calculated using either the min/max or histogram method. The min/max method uses the maximum value found. The histogram method uses the m ost common value found above the midpoint. This value is measured over the entire waveform or gated region.

This value is used as 0% whenever high reference, mid reference, or low reference values are needed, such as in fall time or rise time measurements. Calculated using either the min/max or histogram method. The min/max method uses the minimum value found. The histogram method uses the most common value found below the midpoint. This value is measured over the entire waveform or gated region.

Positive Overshoot = (Maximum – High) / Amplitude x 100%.

Negative Overshoot = (Low – Minimum) / Amplitude x 100%.

igh value less the average low value measured over the entire waveform

Mean

Cycle

RMS The true Root Mean Square voltage over the entire waveform or gated region.

Cycle RMS The true Root Mean Square voltage over the ﬁrst cycle in the waveform or the ﬁrst

ithmetic mean over the entire waveform or gated region.

The ar

ithmetic mean over the ﬁrstcycleinthewaveformortheﬁrst cycle in the gated

The ar region.

e in the gated region.

cycl

54 TBS2000 Series User Manual

Area measurement descriptions

Area measurements

Measurement Description

Area A voltage over

waveform or gated region in volt-seconds. Area measured above ground is positive; area measured below ground is negative.

Cycle Area A voltage over time measurement. The measurement is the area over the ﬁrst cycle

in the wavef area above the common reference point is positive, and the area below the common reference point is negative.

time measurement. The measurement returns the area over the entire

orm or the ﬁrst cycle in the gated region expressed in volt-seconds. The

Taking a measurement on just a part of the waveform (Gating)

Gating sets the automatic measurements to use only a speciﬁed part of a waveform for the measurements. The Gating

function applies to all channels and all measurements (in other words, you cannot set a different gating region for individual measurements or different channels).

1. Push Measure.

Analyzing a wave

form

2. Push the Gating side-menu button.

3. Use the Multipurpose knob to select and click the area of the waveform to use for taking measurements (Off (Full Record), Screen, Between Cursors)

If selecting Between Cursors,usethe Multipurpose knob to select and move the

g cursors to mark the waveform area

gatin to use for automatic measurements.

TBS2000 Series User Manual 55

Analyzing a wave

form

Using cursors to take manual measurements

Cursors are on-screen vertical and horizontal lines that you pos ition on a waveform to take measurements. The cursors have readouts that show the value at their position or where they cross a waveform. Cursors also show the absolute difference measurement value (or delta) between two cursor positions.

Cursor readouts appear next to the cursors. The readouts show the signal values at the current cursor positions. The readouts also show the difference (delta, marked with a  symbol) between the cursor measurements. The oscilloscope always shows the readouts when the cursors are turned on.

NOTE. Cursors are not available in XY display mode.

1. Push Cursors to display two vertical Time cursors by default.

The color of the cursors indicates the channel on which they are taking measurements.

The solid line cursor is the active (selected) cursor, and is controlled by the M ultipu rpo se knob.

2. Use the Multipurpose knob to m o ve the solid line (selected) cursor. The readouts associated with that cursor change as youmovethecursor.

56 TBS2000 Series User Manual

Analyzing a wave

form

3. Push the Multip

the other cursor (which becomes a solid line), then turn the knob to move that cursor. The ﬁr a dotted line.

4. To make small

adjustments, push the Fine button to toggle between making coarse and ﬁne cursor posit

The Fine button also enables smaller adjustments on the Vertical and

Horizontal Level knob, and many adjustment operations of the Multip urp ose knob.

5. Push the Amplitude or Screen side-menu button to select a different cursor for taking measurements. (See page 57,

Cursor ty

6. Push the L

moves both cursors at the same time.

7. If one or both of the cursors are off of the screen, push the Bring Cursor On Screen side-menu button to bring

off-screen cursors back to the screen.

urpose knob to select

st cursor is now drawn with

er cursor position

ion adjustments.

Position knobs, the Trigger

pes.)

ink side-menu button to turn cursor linking On or Off.IflinkingisOn, turning the Multipurpose knob

8. Push the Cursors front panel button to turn the cursors off.

rtypes

Curso

The cursor types are:

Time or Frequency cursors. These vertical cursors measure time or frequency, the signal amplitude where the cursors cross the waveform, and the absolute difference (delta) between the two cursors cross points (both time and amplitude delta).

Time readouts are relative to the trigger point (which is 0 s ). For example, cursors to the left of the trigger are minus time values.

Amplitude cursors. These horizontal cursors measure vertical amplitude parameters, typically voltage.

TBS2000 Series User Manual 57

Analyzing a wave

form

Screen cursors: A combination of both the vertical and horizontal cursors. Click the

Multipurpose

the cursors.

NOTE. The vertical cursors in screen mode

are not tied t waveform, and so do not show the amplitude value where they cross the signal. Amplitude values are re

knob to cycle through selecting

o where the cursor crosses the

ad from the horizontal cursors.

Creatingmathwaveforms

Math waveforms let you add, subtract, and multiply any two channel waveforms to create a new math waveform. You can then take measurements on the math waveform, or save it to a reference memory or an external waveform data ﬁle.

1. Push M(Math). The oscilloscope displays a red math waveform using the current side menu settings.

2. Push the Source 1 side-menu button.

3. Use the Multipurpose knob to select and click the ﬁrst channel to use for the math waveform.

4. Push the Operator side-menu button.

5. Use the Multipurpose knob to select and click the math operation to apply to the two waveforms (add, subtract, or multiply).

6. Push the Source 2 side-menu button.

7. Use the Multipurpose knob to select and click the second channel to use for the math waveform. The oscilloscope

immediately displays the math waveform.

8. To move the math waveform vertical position, push the Position side-menu button and use the M u ltipurpose knob to move the waveform.

9. To change the size (vertical scale) of the math waveform, push the Vertical Scale side-menu button and use the Multipurpose knob to change the waveform scale.

Note that the math vertical scale setting only applies to the math waveform.

58 TBS2000 Series User Manual

Analyzing a wave

An example of using a math waveform is to calculate instantaneous power (current times voltage waveform and a current waveform.

) by multiplying a voltage

Math waveform tips

Math waveforms get their horizontal scale and position from the sources channels. Adjusting these controls for the

source wav

eforms also adjusts the math waveform.

form

Using F

There are many signals that have some sort of distortion or unwanted characteristics. Sometimes these distortions do not affect how that signal works in the circuit. But often system clock pulses, signals induced from a nearby printed circuit path, or noise from a power supply or other source can affect a signal and prevent it from operating correctly. The FFT function is a powerful tool to help you ﬁnd the frequencies of unwanted signals that are embedded in your main signal.

The FFT function uses Fast Fourier Transformation ( FFT) mathematical calculations on the waveform data to determine the component frequencies in the signal. T he resulting waveform shows a series of ‘spikes’ along a horizontal axis, w here each spike represents a frequency component of the waveform and its amplitude. In other words, an FFT is a basic spectrum analyzer function to analyze frequency components of a waveform.

1. Acquire and display several cycles of the

NOTE. You can only display FFT waveforms for

2000 and 20K point record length waveforms.

Adding or

You c a n ta

side menu in the Measure screen and select the measurements to apply.

You can save a math waveform to a reference memory or to a ﬁle on a USB drive. You can also recall (load) math

waveforms into reference memory. (See page 72, Recalling waveform data.)

You can zoom in on math waveforms using the Navigation controls (Zoom button and Multipurpose knob).

subtracting waveforms with different units sets the math waveform units to “?”.

ke automatic measurements on math waveforms similarly as on channel waveforms. Just select the Math

FT to see signal frequency information

waveform.

2. Push F (FFT) button.

TBS2000 Series User Manual 59

Analyzing a wave

The oscilloscope shows the default FFT screen. The lower main screen shows the FFT waveform.

Use the Vertical Position knob of the source channel to move the FFT waveform up or down.

form

3. Push Source

4. Push the Source side-menu button and use Multipur pose knob to set the source to channel 1, 2, 3,or4. The default

source is w

5. Push the Vertical Units side-menu button and use the Multipurpose knob to select and click

Use the default dBV RMS Vertical Units scale to see a detailed view of multiple frequen very different amplitudes.

Use the an overall view of how all frequencies levels compare to each other.

wfm side-menu button to toggle the display of the source waveform (at the top of the screen) On or Off.

hatever channel was selected before opening the FFT window.

dBV RMS or Linear RMS.

cies, e ven if the frequencies have

Linear RMS vertical scale to see

6. Push

7. Push

60 TBS2000 Series User Manual

the Window side-menu button and use the Multipurpose knob to select and click Hanning, Rectangular, Hamming,

or Blackm an-Harris. (See page 62, About FFT windows.)

the Horizontal Center Position side-menu button and use the Multipurpose knob to position the

graph horizontally. The readout on the

FFT side menu is the frequency of the waveform point that is positioned on the center vertical

ticule. Use this to quickly measure FFT

gra ‘spike’ frequencies.

8. Push the Horizontal Scale side-menu

button and use the Multipurpose knob to set the hori major graticule division) value. Use this to expand or contract the FFT waveform to show more o waveform expands around the c enter cursor.

zontal scale (frequency per

r less detail. The FFT

Analyzing a wave

form

9. Push the Cur

use the cursors to take m easurements.

sors front-panel button and

FFT tips

You can only display FFT waveforms for 2000 and 20K record length waveforms.

Use the Vertical Position knob of the source channel to change the vertical position of the FFT waveform.

Use the Vertical Scale knob of the source channel to change the vertical size of the FFT waveform.

Use cursors to measure frequencies and relative signal levels.

Input signals that have a DC component or offset can cause incorrect FFT waveform component magnitude values. To

minimize the DC component, use AC Coupling on the input signal.

To reduce random noise and aliased components (See page 63.) in repetitive or single-shot events, set the oscilloscope acquisition mode to average over 16 or more samples. Average mode attenuates signals not synchronized with the trigger.

Do not use the Average acquisition mode if the source signal contains frequencies of interest that are not synchronized with the trigger rate.

For transient (impulse, one-shot) signals, set the oscilloscope trigger conditions so that the transient pulse waveform is centered in the waveform record.

TBS2000 Series User Manual 61

Analyzing a wave

About FFT windows

The FFT algorithm applies a ‘window’ process to the source waveform record to ‘shape’ the record so that the start and stop values for the FFT waveform are close to the same amplitude. Starting and stopping the waveform at close to the same amplitude reduces adding artiﬁcial waveform that are not present in the actual signal. Using a window on the source signal results in an FFT waveform that more accurately represents the source signal frequency components.

form

The different window shapes are trade-offs between frequency accuracy and magnitude accuracy. What you want to measure, and your source signal characteristics, help you to select which window to use. Use the following guidelines to select the best window for your signal analysis needs. The Hanning window is a good starting point for FFT measurements.

Table 2: FFT windows

Window type Window ‘shape’

Hanning

This is a very good window for m easuring amplitude accuracy but less so for resolving frequencies.

Use Hanning for measuring sine, periodic, and narrow band random noise. This w indow works on transients or bursts w here the signal levels before and after the event are signiﬁcantly different.

Rectangular

This is the best type of window for resolving frequencies that are very close to the same value but worst for accurately measuring the amplitude of those frequencies. It is the best type for measuring the frequency spectrum of nonrepetitive signals and measuring frequency components near DC.

Use Rectangular for measuring transients or bursts where the signal level before and after the event are almost equal. Also, use this window for equal-amplitude sine waves with frequencies that are very close, and for broadband random noise with a relatively slow varying spectrum.

62 TBS2000 Series User Manual

Analyzing a wave

Table 2: FFT windows (cont.)

Window type Window ‘sha pe’

Hamming

This is a very good window for resolving frequenc ies that are very close to the same value with somewhat improved amplitude accuracy over the rectangular window. It has a slightly better frequency resolution than the Hanning.

Use Hamming for measuring sine, periodic, and narrow band random noise. This window works on transients or bursts where the signal levels before and after the event are signiﬁcantly different.

Blackman-Harris

This is the best window for measuring the amplitude of frequencies but worst at resolving frequencies.

Use Blackman-Harris for measuring predominantly single frequency waveforms to look for higher order harmonics.

FFT and display waveform aliasing

FFT waveform problems occur when the oscilloscope acquires a signal that contains frequency components that are greater than the Nyquist frequency (the Nyquist frequency is 1/2 of the sample rate). The frequency components that are above the

t frequency are undersampled and appear to "fold back," or reﬂect, around the right edge of the graticule, showing as

Nyquis lower-frequency components in the FFT waveform. These incorrect components are called aliases.

form

You c an use the following methods to reduce or eliminate aliases:

Increase the sample rate by adjusting the Horizontal Scale front-panel knob to a faster frequency setting. Since you increase the Nyquist frequency as you increase the horizontal sampling r ate (samples/second), the aliased frequency components should appear at their proper frequency. If the increased number of frequency components shown on the screen makes it difﬁcult to measure individual components, use the Horizontal Scale side-menu button in the FFT menu to display more detail of the FFT waveform.

Use a ﬁlter on the input signal to limit the signal to frequencies below that of the Nyquist frequency. If the frequency components you are interested in are below the built-in 20 MHz bandwidth setting, push the Vertical Menu button and set the channel bandwidth to 20 MHz.

TBS2000 Series User Manual 63

Analyzing a wave

form

Displaying reference waveforms

A reference waveform is a waveform that you have stored in a nonvolatile memory location on the oscilloscope. You can use a reference waveform as a standard against which to compare other waveforms.

You can save channel, math, and FFT waveforms to reference memory. Reference waveforms remain in memory when the oscilloscope is powered off.

See the Saving waveform data topic to learn how to save waveforms to reference memory or external ﬁles. (See page 67, Saving waveform data.)

1. Push the RReffront-panel button.

2. Push the Ref1 or Ref2 side-menu button to toggle displaying that waveform On or Off.

You can display both reference waveforms at the s ame time.

Reference waveform tips

not position or scale a reference waveform. You should set the source waveform position and scale before saving

You can to a reference location, so that you have space on the screen to display both the reference waveform and the live signal.

You can use Zoom to show more detail on reference waveforms.

64 TBS2000 Series User Manual

How to view long record length waveforms (Zoom)

The Navigation controls (Zoom button, the Zoom side menu, and the Multipurpose knob) let you magnify and examine portions of a waveform (Ch1-Ch4, Math, Reference).

A zoomed display consists of two parts. The upper display shows the entire displayed waveform record and the position and size of the zoomed part in the waveform (in brackets) within the entire record. The lower display shows the zoomed view of the w aveform (the part enclosed in brackets in the upper display).

Analyzing a wave

form

1. Select the channel that you want to zoom.

2. Push Zoom.

3. Push t

4. Push

he Scale side-menu button and use the M ultipurpose knob to adjust the size of the area to zoom (magnify).

the Position side-menu button and use the Multipurpose knob to adjust the position of the zoom area in the

waveform record.

TBS2000 Series User Manual 65

Saving data

The oscilloscope has internal memory locations where you can save instrument setups and waveforms. You can also save screen images, setups, and waveforms to ﬁles on an external USB drives.

Saving screen images to a ﬁle

Use this procedure to save a screen image to a ﬁle on a USB drive. A screen image is a ‘picture’ of the oscilloscope screen. Screen imag

NOTE. A screen image is different than waveform data. A screen image is a picture of the screen, and does not contain any

data about the signals shown in the image. Waveform data is a ﬁle that contains the numeric values of all the sampled points in a single waveform ﬁle into other oscilloscopes, or into PC-based analysis programs to perform advanced signal measurements.

1. Install a USB drive.

2. Set up the display to show the waveforms and other readouts that you want to save.

es are useful to include in reports or to compare with other screen images over time.

channel waveform. You cannot use a screen image ﬁle for further analysis, whereas you can load the data from a

3. Push the Save/Recall front-panel button.

4. Push the Action side-menu button.

5. Use the Multipurpose knob to select and click Save Image.

6. Push the File Format side-menu button.

7. Select and click a graphical ﬁle format (BMP, JPG,orPNG).

8. Push the Save side-menu button to save the screen image to an automatically-named ﬁle at the top level of the USB drive.

(See page 78, About automatically generated ﬁle names.)

You can also set the File Save button to automatically save an image ﬁle to the USB drive. (See page 70, Saving ﬁles to USB with the Save File button.)

About saved image ﬁle formats

The image save function saves s creen information to three common image formats.

66 TBS2000 Series User Manual

BMP: This bitmap format uses a lossless algorithm, and is compatible with most word processing and spreadsheet

programs; this

is the default. Creates the largest ﬁle size.

Saving data

JPG:Thisbitm

spreadsheet programs. Creates the smallest ﬁle size.

PNG: This bitmap format uses a lossless compression algorithm, and is compatible with most word processing and

spreadsheet programs.

Saving wavef

Use this procedure to save waveform data to a reference ( Ref) memory location or an external ﬁle.

1. (Optional) Install a USB drive to save the waveform data to a ﬁle on the USB drive.

2. Acquire and display the waveform that you want to save.

3. Push the Save/Recall front-panel button.

4. Push the Action side-menu button.

ap format uses a lossy compression algorithm, and is compatible with most word processing and

orm data

5. Use the Multipurpose knob to select and click Save Waveform.

6. To save waveform data to internal reference memory:

NOTE. 20M record length waveforms cannot be saved to reference memory. All other record length waveforms can be

to reference memory.

saved

a. Push the Save To side-menu button.

b. Select and click Ref.

c. Push the Source side-menu button

d. Select and click the waveform data source (CH 1-CH4, Math, FFT).

TBS2000 Series User Manual 67

Saving data

NOTE. The selected waveform must be displayed on the screen to save waveform data.

e. Push the To sid

f. Select and cli

g. Push the Save

7. To save wavef

a. Push the Sav

b. Select and c

c. Push the Sou

d. Select and

NOTE. The selected waveform must be displayed on the screen to save waveform data.

e. Push the Save side-menu button to save the waveform data to an automatically named ﬁle on the USB drive. (See

page 78, Abo

e-menu button.

ck Ref1 or Ref2.

side-menu button.

orm data to a ﬁ le on the USB drive:

eToside-menu button.

lick USB File (*.ISF) or USB File (*.CSV). (See page 68, About waveform data ﬁles.)

rce side-menu button

click the waveform data source (CH1-CH4, Math, FFT, Ref1, Ref2).

ut automatically generated ﬁle names.)

About waveform data ﬁles

.ISF (Internal File Format): Sets the oscilloscope to save waveform data from analog channels (and math and reference

waveforms derived from analog channels), in internal waveform save ﬁle (ISF) format. This format is the fastest to write and creates the smallest-sized ﬁle. Use this format if you i ntend to recall a waveform to reference memory for viewing or measuring.

.CSV (comma separated values): Sets the oscilloscope to save waveform data as a comma-separated data ﬁle compatible with popular spreadsheet programs. This ﬁle cannot be recalled to reference memory. A CSV ﬁle is signiﬁcantly larger than an ISF ﬁle, and takes longer to write to the USB drive.

To ﬁnd out the channel for which the ﬁle was written, open the ﬁle in a text editor. The channel name is in the top few lines of the ﬁle.

68 TBS2000 Series User Manual

Saving oscilloscope setup information

You can save the oscilloscope internal settings to an internal memory location (setup 1–10) or to an external ﬁle on the USB drive. A setup ﬁle contains most of the oscilloscope settings, including vertical, horizontal, trigger, cursor, and measurement parameters. It does not include communications information, such as GPIB addresses. You can then use the setup data to quickly set the oscilloscope to take a certain measurement.

Use this procedure to save the current oscilloscope settings to a memory location or external ﬁle.

1. (Optional) Install a USB drive to save the setup data to a ﬁle on the USB drive.

2. Push the Save/Recall front-panel button.

Saving data

3. Push the A

4. Use the M

5. To sa ve s

a. Push Sav

b. Select a

c. Push Se

d. Push Sa

6. To sa ve

a. Push S

b. Use th

c. Push S

ction side-menu button.

ultipurpose knob to select and click Save Setup.

etup data to internal setup m emory:

eToside-menu button.

nd click Setup.

tup side-menu button and use the Multipurpose knob to select the setup memory location (1-10).

ve side-menu button.

setupdatatoaﬁle on the USB drive:

ave To side-menu button.

e Multipu rpose knob to select and click USB File (*.SET ﬁle).

ave TEKxxxxx.SET side-menu button to s ave the setup data to an automatically named *.SET ﬁle at the top

level of the USB drive. (See page 78, About automatically generated ﬁle names.)

TBS2000 Series User Manual 69

Saving data

Saving ﬁles to USB with the Save File button

The Save File button is a quick, one-push way to save a speciﬁed data ﬁles to the USB drive. After you have deﬁned the save parameters with the Save/Recall button and Action side-menu button, you can assign that save action to the Save File button. For example, if you assign Save to write waveform data to a USB drive, then each push of the Save button saves the current waveform data to the USB drive.

NOTE. The Save button only saves ﬁles to the USB drive. You cannot assign the Save button to save information to

reference or setup memory, or to recall ﬁles from the USB drive.

NOTE. The oscilloscope saves ﬁles to the top level of the USB drive by default. You can use the Change folder button

in the File Utility side menu to set the oscilloscope to save ﬁles to a speciﬁc location on the USB drive. (See page 75, Changing the default ﬁle save location on the USB drive.)

Files are saved to the USB d rive using a speciﬁc naming convention. (See page 78, About automatically generated ﬁle names.)

1. Push the Save/Recall front-panel button.

2. Push the Assign To side-menu button.

3. Push the side-menu buttons for the action that you want to assign to the Save button (Screen Image, Waveform,or Setup). The save button is now assigned to that action.

4. For image or setup ﬁles: Use the Save/Rec side-menu buttons to select the output format for the action you assigned to

ave button (BMP, JPG, or PNG for screen images; .ISF or .CSV for waveforms).

the S

NOTE. Setup ﬁles will always be saved as .SET ﬁles.

5. For waveform ﬁles: Use the Save/Rec side-menu buttons to select the signal source for saving waveforms (CH1-CH4,

h, Ref1-2).

Mat

htheSave button to conﬁrm that the assigned ﬁle type and format was saved to the USB drive.

6. Pus

NOTE. The Assign To button does not store the current save settings (such as ﬁle format or waveform source). The Save

button uses the settings of the Save/Rec side menu to save ﬁles.

70 TBS2000 Series User Manual

Recalling data

The oscilloscope provides permanent internal memory locations from which you can recall instrument setups and waveforms. You can also recall (load) setups and waveforms from ﬁles on an external USB drive.

Recalling oscilloscope setup information

Recalling data

Use this proc those settings.

You can recall (load) saved setup data to quickly conﬁgure the oscilloscope to take a certain measurement. A setup ﬁle contains most of the oscilloscope settings, including vertical, horizontal, trigger, cursor, and measurement parameters. It does not inc

1. (Optional

2. Push the Sa

3. Push the Action side-menu button.

4. Use the Multipurpose knob to select and click Recall Setup.

5. To recall setup data from internal setup memory:

a. Push the Recall From side-menu button.

b. Select and click Setup.

edure to recall ( load) oscilloscope settings from a memory location or external ﬁle and set the oscilloscope to

lude communications information, such as GPIB or LAN conﬁguration.

) Install a USB drive to recall the setup data from a ﬁle on the USB drive.

ve/Recall front-panel button.

c. Push the Setup side-menu button and use the Multipurpose knob to select the setup memory location (1-10).

d. Push the Recall side-menu button. The oscilloscope changes its settings to those that are in the speciﬁed setup

memory.

6. To recall (load) setup data from a ﬁle on the USB drive:

a. Push the Recall From side-menu button.

b. Select and click USB File (*.SET).

c. Push the Select File side-menu button.

d. Highlight the setup ﬁle (*.SET) to load.

e. Push the Multipurpose knob or the Recall side-menu button. The oscilloscope loads and implements the settings.

TBS2000 Series User Manual 71

Recalling data

Recalling waveform data

Use this procedure to recall (load) waveform data from an external .ISF ﬁle to load into a reference memory location and display on the oscilloscope. The oscill oscope can only load .ISF waveform data ﬁles.

NOTE. 20M record length waveforms cannot be loaded into reference memory, either directly from the oscilloscope or from

a saved ﬁle. All other record length waveforms can be loaded into reference memory.

1. Install a USB drive that contains the .ISF waveform data ﬁle.

2. Push the Save/Recall front-panel button.

3. Push the Action side-menu button.

4. Use the Multipurpose knob to select and click Recall Waveform.

5. Push the To side-menu button.

6. Select and click Ref1 or Ref2.

7. Push Select File side-menu button to open the File Utility pane.

8. Use the Multipurpo se knob to select the waveform ﬁle (*.ISF).

9. Push Recall side-menu button. The oscilloscope loads the waveform data into the selected reference memory.

NOTE. If the Recall side-menu button shows No ﬁle, then you have not selected an .ISF ﬁle.

72 TBS2000 Series User Manual

Using the USB Fil

e Utility functions

Using the USB F

Use the File Utility functions to do ﬁle-related tasks on a connected USB drive. File tasks include:

Change the default folder where ﬁles are saved.(See page 75, Changing the default ﬁ le save location on the USB drive.)

Create new folders (See page 76, Creating a new folder on the USB drive.)

Delete ﬁles and folders (See page 76, Deleting ﬁles or folders from the USB drive.)

Rename ﬁles and folders (See page 77, Renaming ﬁles or folders on the USB drive .)

Format the USB drive (See page 78, Formatting the USB drive.)

ile Utility functions

Overview of the File Utility pane

To open the File Utility pane, push the Save/Recall front-panel button and push the File Utility side-menu button.

The Directory ﬁeld lists the path for the highlighted folder or ﬁle. This is also the ﬁeld you use to enter text to create

or rename ﬁles or folders.

The area below the Directory ﬁeld shows the ﬁles and folders. Use the Multipurpo se knob to highlight a name. Push

ltipurpose to open or close a folder. Folders are marked with a  when closed, and with a  when that

the Mu folder is open.

The File side-menu buttons perform the indicated ﬁle utility functions. Change Folder, Delete, and Format directly

perform the indicated tasks.

New Folder and Rename open the character entry ﬁeld, keyboard, and side-menu buttons, shown in the following image.

TBS2000 Series User Manual 73

Using the USB Fil

Use the Multipurpose knob to select and click a recently created name (li sted at top of the characters list), or highlight the individual letters of the name that you want to enter. Then push the Multipurpose knob to add that letter to the

Tektronix TBS2102, TBS2072, TBS2074, TBS2104 User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual