HP 54753A User manual

User’s Guide

Publication number 54753-97010

Second edition, January 1999

For Safety information, Warranties, and Regulatory information, see pages

behind the index

HP 54753A and HP 54754A TDR

Plug-in Modules

HP 54753A and HP 54754A Plug-in Modules

The HP 54753A and 54754A TDR plug-in modules provide you with TDR

and TDT measurement features. In addition to the TDR and TDT

measurement features, the TDR plug-ins provide two accurate

oscilloscope measurement channels with user selectable bandwidths of

12.4 or 18 GHz. The lower bandwidth mode provides excellent

oscilloscope noise performance for accurate measurement of small

signals. The high bandwidth mode provides high-fidelity display and

measurement of very high-speed waveforms.

The HP 54753A TDR plug-in module provides:

• Automatic and manual single-ended TDR and TDT measurement

capability

• Automatic and manual waveform, histogram, FFT, waveform math,

eye pattern measurements, statistical measurements, and limit

testing capabilities.

• User selectable 12.4 or 18 GHz bandwidth (Channel 1).

• User selectable 12.4 or 20 GHz bandwidth (Channel 2).

• 2.5 GHz bandwidth trigger channel.

• 3.5 mm (m) connectors.

The HP 54754A TDR plug-in module provides:

• Automatic and manual single-ended and differential TDR and TDT

measurement capability.

• Automatic and manual waveform, histogram, FFT, waveform math,

eye pattern measurements, statistical measurements, and limit

testing capabilities.

• User selectable 12.4 or 18 GHz bandwidth.

• 2.5 GHz bandwidth trigger channel.

• 3.5 mm (m) connectors.

iii

Accessories Supplied

The following accessories are supplied with the TDR plug-in modules:

One 50 ohm SMA (m) terminator, HP part number 1250-2153

Two SMA shorts (m), HP part number 0960-0055

TDR Demo Board, HP part number 54754-66503

One User’s Guide

One Programmer’s Guide

One Service Guide

Accessories Available

The following accessories are available for use with the TDR plug-in

modules.

Options

Option 0B1 Additional set of user documentation

Option 001 HP 83480A mainframe operating system upgrade

Option 002 HP 54750A mainframe operating system upgrade

Option 003 Delete demo board

HP 54755A TDR option for HP 83480A mainframe operating system upgrade

Optional Accessories

HP 10086A ECL terminator

HP 54006A 6 GHz divider probe

HP 54007A accessory kit

HP 54008A 22 ns delay line

HP 54118A 500 MHz to 18 GHz trigger

HP 54701A 2.5 GHz Active Probe with Option 001

Connection Devices

SMA (f-f) adapter, HP part number 1250-1158

APC 3.5 (f-f) adapter, HP part number 1250-1749

In This Book

This book is the operating manual for the HP 54753A and HP 54754A TDR plug-

in modules, and contains 13 chapters.

General Information Chapter 1 contains overview information, menu

and front panel key information, trigger information, and calibration

information. Chapter 2 contains important information on the care of the

TDR plug-in connectors.

TDR Front Panel and Menu Keys Chapter 3, 4, 5 and 6 describe the

front panel keys and all the menu keys.

Task Oriented Examples Chapter 7 contains example single-ended

TDR measurements using a demo board included with each TDR plug-in

module. Chapter 8 contains example differential TDR measurements.

TDR Theory Chapters 9, 10, and 11 contain in-depth theory of TDR

transmission lines and how to use TDR in designing systems.

Specifications and Characteristics Chapter 12 contains the

specifications and characteristic for the TDR plug-in modules.

Problems and Error Messages Chapter 13 contains troubleshooting

information and error messages.

Contents

Contents-1

1 The Instrument at a Glance

Menu and Key Conventions 1-3

The HP 54753A, 54754A TDR Plug-In Modules 1-4

Plug-in Module Purpose 1-4

Front Panel of the Plug-in Module 1-4

Getting the Best Performance 1-5

Installing a Plug-in Module 1-6

Trigger 1-6

2 Care and Handling of Precision Connectors

3.5 mm Connector Care 2-3

Connector Wear 2-3

Operator Skill 2-3

Device Specifications 2-3

Accuracy Considerations 2-6

Visual Inspection 2-8

Mechanical Inspection 2-8

Connecting the Devices 2-16

3 Setup Channel Menu

Displaying the Setup Channel menu 3-4

Display 3-4

Scale 3-4

Offset 3-5

Bandwidth. . . 3-6

Alternate scale. . . 3-6

Calibrate . . . 3-8

Calibration Overview 3-12

Factory Mainframe Calibration 3-13

User Calibrations 3-16

4 HP 54753A TDR/TDT Setup Menu

Displaying the TDR/TDT Setup Menu 4-4

Stimulus 4-4

TDT 1 dest 4-4

Contents

Contents-2

TDR 1 dest 4-5

Normalize response . . . 4-5

TDR rate automatic . . . (250 kHz) 4-8

Preset TDR/TDT 4-8

5 HP 54754A TDR/TDT Setup Menu

Displaying the TDR/TDT Setup Menu 5-7

Stimulus 5-7

TDT 1 dest 5-8

Normalize response . . . 5-8

TDR rate automatic . . . (250 kHz) 5-11

Preset TDR/TDT 5-12

TDT 2 dest 5-13

Normalize response . . . 5-13

TDR rate automatic . . . (250 kHz) 5-16

Preset TDR/TDT 5-17

TDT 1 dest 5-18

TDT 2 dest 5-18

Normalize 1 response . . .

Normalize 2 response . . . 5-19

TDR rate automatic . . . (250 kHz) 5-21

Preset TDR/TDT 5-22

TDR/TDT 5-23

TDR response 1 5-23

TDR response 2 5-24

TDT response 1 5-25

TDT response 2 5-25

Establish ref plane 5-26

TDR rate automatic . . . (250 kHz) 5-27

Preset TDR/TDT 5-28

TDT 1 dest 5-30

TDR 1 dest 5-30

Normalize response . . . 5-31

TDR rate automatic . . . (250 kHz) 5-34

Preset TDR/TDT 5-34

6 Measure and Other TDR Specific Menus

TDR/TDT Measure Menu 6-4

Contents

Contents-3

Marker Menu 6-9

Reference 6-9

Marker units . . . 6-9

Response Menu Items 6-10

7 Single-ended TDR Measurements

Single-ended TDR Features 7-3

Establishing the Reference Plane and Normalizing 7-8

Measuring Transmission Line Impedance 7-19

Measuring Transmission Line Percent Reflection 7-25

Measuring Excess L/C 7-32

Measuring the Distance to a Discontinuity 7-37

8 Differential TDR Measurements

Differential TDR Features 8-3

Measuring Differential and Common Mode Impedance 8-5

Making Differential TDT Measurements 8-15

9 TDR Fundamentals

Propagation on a Transmission Line 9-4

Step Reflection Testing 9-6

Instrument Configuration 9-20

10 Improving Time Domain Network Measurements

Sources of Measurement Error 10-3

Removing Measurement Errors 10-6

11 Transmission Line Theory Applied to Digital Systems

Transmission Line Design 11-2

Signal Propagation Delay for Microstrip and Strip Lines with Distributed or Lumped

Loads 11-15

Microstrip Transmission Line Techniques Evaluated Using TDR Measurements 11-

References 11-38

Contents

Contents-4

12 Specifications and Characteristics

Specifications 12-3

Vertical Specifications 12-4

Environmental Specifications 12-5

Power Requirements 12-6

Weight 12-6

Characteristics 12-6

Trigger Input Characteristics 12-6

Product Regulations 12-7

13 In Case of Difficulty

If You Have Problems 13-3

If the Mainframe Does Not Operate 13-3

If the Plug-in Does Not Operate 13-4

Error Messages 13-5

The Instrument at a Glance

1-2

The Operating the Instrument

CAUTION The input circuits canbe damaged byelectrostatic discharge (ESD). Therefore,

avoid applying static discharges to the front-panel input connectors. Before

connecting any coaxial cable to the connectors, momentarily short the center

and outer conductors of the cable together. Avoid touching the front-panel

input connectors without first touching the frame of the instrument. Be sure

the instrument is properly earth-grounded to prevent buildup of static charge.

What you’ll find in this chapter

This chapter describes:

• the key conventions used in this manual

• the front panel, rear panel and keys that do

not

display menus on the screen

Understanding the information in this chapter will help you successfully operate

the instrument.

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