Agilent Technologies 2000 X Manuale utente

Agilent 2000 X-Series

Oscilloscopes

Advanced Training Guide

Lab guide and tutorial for making advanced

oscilloscope measurements using an Agilent

2000 X-Series oscilloscope with the DSOXEDK

training kit.

Notices

The copyright on this instructional material

grants you permission to reprint, modify,

and distribute in whole or in part the docu-

ment for the purpose of training on Agilent

test equipment.

Manual Part Number

75010-97012

Edition

April 5, 2013

Available in electronic format only

Agilent Technologies, Inc.

1900 Garden of the Gods Road

Colorado Springs, CO 80907 USA

Warranty

The material contained in this docu-

ment is provided “as is,” and is sub-

ject to being changed, without notice,

in future editions. Further, to the max-

imum extent permitted by applicable

law, Agilent disclaims all warranties,

either express or implied, with regard

to this manual and any information

contained herein, including but not

limited to the implied warranties of

merchantability and fitness for a par-

ticular purpose. Agilent shall not be

liable for errors or for incidental or

consequential damages in connection

with the furnishing, use, or perfor-

mance of this document or of any

information contained herein. Should

Agilent and the user have a separate

written agreement with warranty

terms covering the material in this

document that conflict with these

terms, the warranty terms in the sep-

arate agreement shall control.

Technology Licenses

The hardware and/or software described in

this document are furnished under a

license and may be used or copied only in

accordance with the terms of such license.

Restricted Rights Legend

If software is for use in the performance of

a U.S. Government prime contract or sub-

contract, Software is delivered and

licensed as “Commercial computer soft-

ware” as defined in DFAR 252.227-7014

(June 1995), or as a “commercial item” as

defined in FAR 2.101(a) or as “Restricted

computer software” as defined in FAR

52.227-19 (June 1987) or any equivalent

agency regulation or contract clause. Use,

duplication or disclosure of Software is

subject to Agilent Technologies’ standard

commercial license terms, and non-DOD

Departments and Agencies of the U.S. Gov-

ernment will receive no greater than

Restricted Rights as defined in FAR

52.227-19(c)(1-2) (June 1987). U.S. Govern-

ment users will receive no greater than

Limited Rights as defined in FAR 52.227-14

(June 1987) or DFAR 252.227-7015 (b)(2)

(November 1995), as applicable in any

technical data.

Safety Notices

CAUTION

A CAUTION notice denotes a haz-

ard. It calls attention to an operat-

ing procedure, practice, or the like

that, if not correctly performed or

adhered to, could result in damage

to the product or loss of important

data. Do not proceed beyond a

CAUTION notice until the indicated

conditions are fully understood and

met.

WARNING

A WARNING notice denotes a

hazard. It calls attention to an

operating procedure, practice, or

the like that, if not correctly per-

formed or adhered to, could result

in personal injury or death. Do not

proceed beyond a WARNING

notice until the indicated condi-

tions are fully understood and met.

2000 X-Series Oscilloscopes Advanced Training Guide 3

Contents

1 Getting Started

Lab Guide—At a Glance 5

Front Panel Overview 6

Run Control 7

Waveform Controls 7

Horizontal Controls 8

Vertical Controls 9

Trigger Controls 9

Tools Controls 10

2 Oscilloscope Familiarization Labs

Lab #1: Using Cursors and Automatic Parametric Measurements 12

Lab #2: Using Zoom Display to Perform Gated Measurements 19

Lab #3: Using Waveform Math 23

Lab #4: Using Peak Detect Acquisition Mode 27

Lab #5: Using Segmented Memory Acquisition Mode 30

Lab #6: Using Mask Test 35

3 Advanced Triggering, Search & Navigation, and Segmented Acquisition Labs

Lab #7: Triggering on a Digital Burst using Trigger Holdoff 40

Lab #8: Triggering on Unique Pulses and Glitches using “Pulse-width” Trigger 44

Lab #9: Triggering on Logic Patterns using the MSO’s Digital Channels 48

4 Serial Bus Decoding & Triggering, Search & Navigation, and Segmented Acquisition Labs

Lab #10: Decoding, Triggering, and Searching on I2C Serial Bus Signals 54

Lab #11: Decoding, Triggering, and Searching on SPI Serial Bus Signals 61

Lab #12: Decoding, Triggering, and Searching on RS232/UART Serial Bus Signals 67

Lab #13: Decoding, Triggering, and Searching on CAN Serial Bus Signals 75

Lab #14: Decoding, Triggering, and Searching on LIN Serial Bus Signals 81

4 2000 X-Series Oscilloscopes Advanced Training Guide

A Oscilloscope Block Diagram and Theory of Operation

DSO Block Diagram 88

ADC Block 88

Attenuator Block 89

DC Offset Block 89

Amplifier Block 89

Trigger Comparator and Trigger Logic Blocks 90

Timebase and Acquisition Memory Blocks 90

Display DSP Block 91

B Oscilloscope Bandwidth Tutorial

Defining Oscilloscope Bandwidth 93

Required Bandwidth for Analog Applications 94

Required Bandwidth for Digital Applications 95

Rule of Thumb 95

Step 1: Determine fastest actual edge speeds 96

Step 2: Calculate fknee 96

Step 3: Calculate scope bandwidth 96

Example 97

Digital Clock Measurement Comparisons 98

C Related Agilent Literature

Index

s15

Agilent 2000 X-Series Oscilloscopes

Advanced Training Guide

Getting Started

Lab Guide—At a Glance 5

Front Panel Overview 6

Lab Guide—At a Glance

This advanced oscilloscope training guide and tutorial is intended to be

used with Agilent Technologies InfiniiVision 2000 X- Series oscilloscopes

(DSO and MSO models) that are licensed with the Oscilloscope Education

Training Kit (DSOXEDK). When licensed with this training kit,

2000 X- Series oscilloscopes are able to generate a broad range of built- in

training signals.

The built- in training signals can be probed by simply connecting a

standard 10:1 passive probe between channel- 1’s input BNC and the front

panel terminal labeled “Demo 1”, and another probe between channel- 2’s

input BNC and the terminal labeled “Demo 2” as shown on the next page.

To turn on specific training signals for each of the labs documented in this

training guide, simply:

1Press the scope’s front panel [Help] key.

2Press the Training Signals sofkey.

3Turn the Entry knob to select the appropriate training signal.

4Press the Output softkey to enable the training signal output on the

Demo terminal(s).

6 2000 X-Series Oscilloscopes Advanced Training Guide

1Getting Started

If you not familiar with the Agilent InfiniiVision 2000 X- Series

oscilloscope, first look over the main sections of the front panel as

illustrated on the following pages, and then begin with Chapter 2,

“Oscilloscope Familiarization Labs,” starting on page 11.

Once you have become familiar with using the basic functions of the

oscilloscope, you can then skip to particular labs of interest. Each

hands- on lab can be considered as a standalone lab exercise because each

begins with a default setup. In other words, successive labs do not build

on the previous lab. They can be completed in any order of preference.

Front Panel Overview

For instant help on any topic, press and hold any key, softkey, or knob.

Getting Started 1

2000 X-Series Oscilloscopes Advanced Training Guide 7

Run Control

When the oscilloscope is turned on, or if [Auto Scale] is pressed, the

acquisition will be set to [Run]. At any time you may [Stop] the acquisition

process to examine a signal in detail or to save it.

•The [Default Setup] key on the front panel sets the oscilloscope to the

default configuration.

Because the oscilloscope may have been used in a variety of

applications by a variety of people, it is a good measurement procedure

to put the oscilloscope in a known starting mode (Default Setup). This

makes it easy to duplicate measurements because no special conditions

are set.

•The [Auto Scale] key on the front panel automatically configures the

oscilloscope by analyzing all active channels, turning them on and

setting the timebase, V/div, and trigger conditions for an initial display.

•Press the [Single] key to make a single acquisition and stop the

acquisition process.

Waveform Controls

•The [Acquire] key on the front panel lets you set the oscilloscope data

acquisition modes.

•The [Display] key on the front panel lets you set the waveform

persistence options and the grid type and grid intensity.

8 2000 X-Series Oscilloscopes Advanced Training Guide

1Getting Started

•The [Intensity] key and the Entry knob lets you set the desired

signal brightness.

Horizontal Controls

aTurn the large knob in the Horizontal control section clockwise and

counter- clockwise to control the time/div setting of the horizontal

axis.

Observe the changes in the displayed signal. The current timebase

setting is displayed at the top of the display on the status line.

bTurn the small knob in the horizontal control section to move the

trigger point (solid orange triangle) from the reference point (hollow

orange triangle).

cPress the [Horiz] key to display the Horizontal menu. Note the various

Time Modes of Normal, Roll, and XY. Also notice the Zoom mode

softkey.

dPress the (zoom) key to quickly turn on the zoom mode. This

split- screen mode shows the big picture on top and an expanded

view on the bottom. Turn the large timebase knob counter- clockwise

to make the window on top larger.

Getting Started 1

2000 X-Series Oscilloscopes Advanced Training Guide 9

Vertical Controls

•Turn the large knobs in the Vertical section to control the V/div setting

for each analog channel. The V/div setting is displayed in the upper left

hand corner of the status line at the top of the display.

Color coding matches analog channel inputs, vertical control knobs, and

waveform colors.

•Press the [1] key to display the channel 1 menu. Press again to turn the

channel on and off.

•Turn the small knobs to control the vertical offset position of the

waveform, moving the ground level up or down.

Trigger Controls

•Turn the Trigger Level knob to move the trigger level up and down. The

trigger level is displayed while it is adjusted. If the trigger level is above

or below the signal and the oscilloscope is in Auto trigger mode, the

oscilloscope will force a trigger and display an acquisition (waveform).

Auto trigger mode is useful when unsure of the exact waveform because

forced acquisitions are displayed, making it easy to better configure the

oscilloscope’s settings and trigger level.

•Press the [Mode/Coupling] key in the Trigger controls section to view the

Trigger Mode and Coupling Menu selections and to set trigger holdoff.

10 2000 X-Series Oscilloscopes Advanced Training Guide

1Getting Started

•Press and hold the Mode softkey to read the built- in help about the

Auto and Normal trigger modes.

Tools Controls

•Press the [Utility] key to access the I/O ports, file explorer, options,

service information, and the “Quick Action” key function settings.

•Press the [Quick Action] key to perform one of the quick action functions

that can be mapped to this key.

•Press the [Analyze] key to set trigger levels, measurement threshold

levels, video trigger auto setup and display, or the mask testing

application options.

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