Tektronix WCA230A, WCA280A User Manual

User Manual

WCA230A & WCA280A Option 26
1xEV-DO Analysis Software

071-1371-00

This document supports software version 1.00 and above.

www.tektronix.com

Copyright © Tektronix, Inc. All rights reserved.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication

supercedes that in all previously published material. Specifications and price change privileges reserved.
Tektronix, Inc., P.O. Box 500, Beaverton, OR 97077
TEKTRONIX and TEK are registered trademarks of T ektronix, Inc.

Software Warranty

T ektronix warrants that the media on which this software product is furnished and the encoding of the programs on the
media will be free from defects in materials and workmanship for a period of three (3) months from the date of
shipment. If a medium or encoding proves defective during the warranty period, T ektronix will provide a replacement
in exchange for the defective medium. Except as to the media on which this software product is furnished, this software
product is provided “as is” without warranty of any kind, either express or implied. Tektronix does not warrant that the
functions contained in this software product will meet Customer’s requirements or that the operation of the programs
will be uninterrupted or error-free.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
the warranty period. If Tektronix is unable to provide a replacement that is free from defects in materials and
workmanship within a reasonable time thereafter, Customer may terminate the license for this software product and
return this software product and any associated materials for credit or refund.

THIS WARRANTY IS GIVEN BY TEKTRONIX IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PAR TICULAR PURPOSE. TEKTRONIX’ RESPONSIBILITY
TO REPLACE DEFECTIVE MEDIA OR REFUND CUSTOMER’S PAYMENT 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.

Hardware Warranty

Tektronix warrants that the products that it manufactures and sells will be free from defects in materials and
workmanship for a period of one (1) year from the date of shipment. If a 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.

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 IN LIEU OF ANY OTHER WARRANTIES, EXPRESS OR
IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED WARRANTIES OF
MERCHANT ABILITY OR FITNESS FOR A P AR TICULAR 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

Getting Started

Operating Basics

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Related Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Contacting Tektronix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . viii

Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

1xEV-DO Forward Link Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Modulation Accuracy Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Code Domain Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

OBW Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

ACPR Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Spectrum Emission Mask Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24

Gated Output Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27

Intermodulation Measurement. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30

CCDF Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

Pilot to Code Channel Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34

1xEV-DO Reverse Link Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37

Modulation Accuracy Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38

Code Domain Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46

Spectrum Emission Mask Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-49

Pilot to Code Channel Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51

Editing the Measurement Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55

Using the Measurement Limits Editor. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55

Saving and Loading Measurement Limits. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64

Measurement Limit Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65

Syntax and Commands

Command Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

:CONFigure Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

:DISPlay Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

:FETCh Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43

:MMEMory Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-65

:READ Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-67

:SENSe Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-79

WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual i

Table of Contents

Appendices

Index

Appendix A: Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Appendix B: Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Appendix C: Setting Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Appendix D: SCPI Conformance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1

ii WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual

List of Figures

List of Figures

Figure 2-1: Menu diagram showing measurement functions available

in Option 26 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2: Modulation accuracy measurement . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-3: Modulation accuracy display . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Figure 2-4: EVM display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-5: MagErr display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Figure 2-6: PhaseErr display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-7: Symbol table display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-8: Code domain power measurement . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-9: Code domain power display . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Figure 2-10: Power codogram display . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Figure 2-11: IQ power graph display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Figure 2-12: Channel power measurement . . . . . . . . . . . . . . . . . . . . . . . 2-21

Figure 2-13: OBW measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Figure 2-14: ACPR measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Figure 2-15: Spectrum emission mask measurement . . . . . . . . . . . . . . . 2-24

Figure 2-16: Gated output power measurement . . . . . . . . . . . . . . . . . . . 2-27

Figure 2-17: Intermodulation measurement . . . . . . . . . . . . . . . . . . . . . . 2-30

Figure 2-18: CCDF measurement (single view) . . . . . . . . . . . . . . . . . . . . 2-31

Figure 2-19: Scale settings in the CCDF display . . . . . . . . . . . . . . . . . . . 2-33

Figure 2-20: Pilot to code channel measurement . . . . . . . . . . . . . . . . . . . 2-34

Figure 2-21: Modulation accuracy measurement-reverse link . . . . . . . 2-38

Figure 2-22: Modulation accuracy display-reverse link . . . . . . . . . . . . . 2-41

Figure 2-23: EVM display-reverse link . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

Figure 2-24: MagErr display-reverse link . . . . . . . . . . . . . . . . . . . . . . . . 2-43

Figure 2-25: PhaseErr display-reverse link . . . . . . . . . . . . . . . . . . . . . . . 2-44

Figure 2-26: Symbol table display-reverse link . . . . . . . . . . . . . . . . . . . . 2-45

Figure 2-27: Code domain power measurement-reverse link . . . . . . . . 2-46

Figure 2-28: Spectrum emission mask measurement-reverse link . . . . 2-49

Figure 2-29: Pilot to code channel measurement-reverse link . . . . . . . . 2-51

Figure 2-30: Measurement limits editor . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55

Figure 2-31: ACPR measurement limits editor . . . . . . . . . . . . . . . . . . . . 2-58

Figure 2-32: Spectrum emission mask measurement limits editor . . . . 2-60

Figure 2-33: Gated output power measurement limits editor . . . . . . . . 2-62

WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual iii

List of Figures

iv WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual

List of Tables

List of Tables

Table 2-1: Measurement limits items . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-56

Table 2-2: Measurement limit items for the ACPR measurement . . . . 2-58

Table 2-3: Measurement limit items for the spectrum emission mask

measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-60

Table 2-4: Measurement limit items for the gated output power

measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62

Table 2-5: Forward link common limits . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65

Table 2-6: Reverse link common limits . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65

Table 2-7: Forward and reverse link: all band classes . . . . . . . . . . . . . . 2-66

Table 2-8: Forward link: BC (band class) 0, 2, 3, 5, and 9 . . . . . . . . . . . 2-66

Table 2-9: Forward link: BC (band class) 1, 4, and 8 . . . . . . . . . . . . . . . 2-67

Table 2-10: Forward link: BC (band class) 3b . . . . . . . . . . . . . . . . . . . . 2-67

Table 2-11: Forward link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . 2-68

Table 2-12: Forward link: BC (band class) 7 . . . . . . . . . . . . . . . . . . . . . . 2-68

Table 2-13: Reverse link: BC (band class) 0, 2, 3, 5, and 9 . . . . . . . . . . . 2-69

Table 2-14: Reverse link: BC (band class) 1, 4, and 8 . . . . . . . . . . . . . . . 2-69

Table 2-15: Reverse link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . 2-70

Table 2-16: Reverse link: BC (band class) 7 . . . . . . . . . . . . . . . . . . . . . . 2-70

Table 2-17: Forward and reverse link: BC (band class) 0, 1, 2, 3, 4, 5, 7,

8, and 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71

Table 2-18: Forward link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . 2-71

Table 2-19: Reverse link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . 2-72

Table 2-20: Forward link, all band classes, idle slot . . . . . . . . . . . . . . . . 2-72

Table 2-21: Forward link, all band classes, active slot . . . . . . . . . . . . . . 2-73

Table 3-1: Measurement modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Table 3-2: :CONFigure commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-3: :DISPlay commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-4: :FETCh commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Table 3-5: :MMEMory commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Table 3-6: :READ commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Table 3-7: :SENSe commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Table 3-8: :DISPlay command subgroups . . . . . . . . . . . . . . . . . . . . . . . . 3-17

Table 3-17: :SENSe command subgroups . . . . . . . . . . . . . . . . . . . . . . . . 3-79

WCA230A & WCA280A Option 26 1xEVDO Analysis Software User Manual v

List of Tables

Table A-1: 1xEV-DO forward link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Table A-2: 1xEV-DO reverse link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2

Table B-1: Factory default settings-:DISPlay commands . . . . . . . . . . . . B-1

Table B-2: Factory default settings-:SENSe commands . . . . . . . . . . . . . B-2

Table C-1: Display format and scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1

Table D-1: SCPI conformance information-:CONFigure commands . . D-1

Table D-2: SCPI conformance information-:DISPlay commands . . . . . D-1

Table D-3: SCPI conformance information-:FETCh commands . . . . . . D-3

Table D-4: SCPI conformance information-:MMEMory commands . . D-3

Table D-5: SCPI conformance information-:READ commands . . . . . . D-4

Table D-6: SCPI conformance information-:SENSe commands . . . . . . D-4

vi WCA230A & WCA280A Option 26 1xEVDO Analysis Software User Manual

Preface

About This Manual

This manual provides operating instructions for the WCA230A & WCA280A
Portable Wireless Communication Analyzers Option 26 1xEV-DO analysis
software.

This manual is composed of the following sections:

 Getting Started provides a product description.
 Operating Basics describes the measurement functions added by the option

and explains how to set up the analyzer for each measurement mode.

 Syntax and Commands lists all command subsystems and describes all

programming commands.

 Appendices provides additional information including specifications, factory

default settings, and SCPI conformance information.

Related Manuals

The following related documents are also available:

 The WCA230A & WCA280A Portable Wireless Communication Analyzers

User Manual (Tektronix part number 071-1253-xx) contains a tutorial that

describes how to operate the analyzer. It also includes an in-depth discussion
on how to more completely use the analyzer features.

 The WCA230A & WCA280A Portable Wireless Communication Analyzers

Programmer Manual (Tektronix part number 071-1255-xx) contains an

alphabetical listing of the programming commands and other information
related to controlling the analyzer over the GPIB interface.

WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual vii

Preface

Contacting Tektronix

Phone [phone]*

Address Tektronix, Inc.

Department or name (if known)
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA

Web site wwww.tektronix.com

Sales support 1-800-833-9200, select option 1*

Service support 1-800-833-9200, select option 2*

Technical support Email: [e-mail]

1-800-833-9200, select option 3*
6:00 a.m. - 5:00 p.m. Pacific time

* This phone number is toll free in North America. After office hours, please leave a

voice mail message.
Outside North America, contact a Tektronix sales office or distributor; see the
Tektronix web site for a list of offices.

viii WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual

Getting Started

Getting Started

Product Description

This section provides an overview of the product capabilities.

The WCA230A & WCA280A Wireless Communication Analyzers Option 26 is an
analysis software option that adds transmitter measurements capability for
1xEV -DO forward link (3GPP2 C.S0032) and reverse link (3GPP2 C.S0033) to the
analyzers.

You can perform the following 1xEV-DO measurements:

 Modulation accuracy
 Code domain power
 Channel power
 OBW (occupied bandwidth)
 ACPR (Adjacent channel power ratio)
 Spectrum emission mask
 Gated output power (forward link only)
 Intermodulation
 CCDF
 Pilot to code channel

In addition, the option provides pre-defined measurement limits for the ACPR,
spectrum emission mask, and gated output power measurements. Using these
measurement limits, you can easily check that the input signal meets the
specification.

WCA230A/WCA280A Option 26 1xEV-DO Analysis Software User Manual 1-1

Getting Started

1-2 WCA230A/WCA280A Option 26 1xEV-DO Analysis Software User Manual

Operating Basics

Functional Overview

This section provides an overview of the Option 26 measurement functions.

Figure 2-1 shows the measurement functions and how to access each measurement
function from the front-panel menu key.

Other option name
(if installed)

MODE

S/A

DEMOD

TIME

DEMOD
menu

Analog Demod

Digital Demod

Standard...

Standard
menu

1xEV-DO-Fwd

1xEV-DO-Rev

Measurement functions
added by Option 26

Modulation Accuracy
Code Domain Power
Channel Power
OBW

MEASURE
menu

MEASURE
menu

ACPR
Spectrum Emission Mask
Gated Output Power
Intermodulation
CCDF
Pilot to Code Channel

Modulation Accuracy
Code Domain Power
Channel Power
OBW
ACPR
Spectrum Emission Mask
Intermodulation
CCDF

Pilot to Code Channel

Figure 2-1: Menu diagram showing measurement functions available in Option 26

WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual 2-1

Functional Overview

Accessing a Measurement

Function

All of the measurement functions available in Option 26 can be selected from the
DEMOD (demodulation) mode.

Perform the following procedure to access any of the measurement functions:

1. Press the DEMOD menu key to open the DEMOD menu.

2. Press the Standard... side key to open the Standard menu.

3. Press the 1xEV-DO Fwd or 1xEV-DO Rev side key to open the MEASURE

menu for the standard.

4. Press one of the side keys to select the measurement that you want to perform.

If the desired measurement is not displayed on the current MEASURE menu,
press the Go to page 2 (of 2) side key to open the next page.

5. If needed, set frequency, span, and amplitude of the input signal.

Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information on how to set frequency, span, and
amplitude.

2-2 WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual

1xEV-DO Forward Link Measurements

This section describes the functions and features of the 1xEV-DO forward link
measurements. Each measurement description contains general information about
the measurement, descriptions of the measurement displays and functions available
through menu selections.

The information is divided into the following subsections:

 Modulation accuracy measurement
 Code domain power measurement
 Channel power measurement
 OBW measurement
 ACPR measurement
 Spectrum emission mask measurement
 Gated output power measurement
 Intermodulation measurement
 CCDF measurement
 Pilot to code channel measurement

NOTE. If you are not familiar with the operation of the WCA230A/WCA280A, r efer

to the WCA230A & WCA280A Portable Wireless Communication Analyzers User
Manual before reading this section.

WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual 2-3

1xEV-DO Forward Link Measurements

Modulation Accuracy Measurement

The modulation accuracy measurement measures Rho (ratio of the correlated
power to the total power), EVM (Error Vector Magnitude), magnitude error, phase
error, frequency error, and origin offset. Figure 2-2 shows an example of the
modulation accuracy measurement.

Figure 2-2: Modulation accuracy measurement

Display Elements

2-4 WCA230A & WCA280A Option 26 1xEV-DO Analysis Software User Manual

The following information is shown in the modulation accuracy measurement
display:

 Overview: This view can contain power versus time or spectrogram.
 Subview: This view can contain spectrum, EVM, magnitude error, phase

error, IQ power graph, and constellation.

 Main view: This view can contain modulation accuracy, EVM, magnitude

error, phase error, and symbol table.

The display contents in each view can be changed using the VIEW DEFINE menu.
Refer to Changing the View Contents on page 2-6 for more information about the
VIEW DEFINE menu.

1xEV-DO Forward Link Measurements

Setting the Timing

Parameters

You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.

 Acquisition (chips): Sets the acquisition length in chips. The range depends

on the acquisition memory size and the span setting.

 Acquisition Length (s): Displays the acquisition length in seconds.
 Acquisition History: Specifies the number of the block to display and

analyze. The latest block is number zero. Older blocks have larger negative
numbers.

 Analysis Interval: Sets the analysis interval in half slots. The range depends

on the acquisition length setting.

 Analysis Offset: Sets the start point of the analysis with respect to the left end

of the acquisition length in half slots.

 Spectrum Length: Displays the time length for FFT processing of the

spectrum displayed in the subview. This value is equivalent to one frame
acquisition length.

 Spectrum Offset: Sets the beginning of Spectrum Length with respect to the

left end of the acquisition length.

NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication

Analyzers User Manual for detailed information about the timing parameters.

Setting the Measurement

Parameters

You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.

 Analyze: Performs analysis for the time slots in the analysis range.
 Measurement Level: Selects the measurement level for the measurement.

You can select Chip (chip level) or Symbol (symbol level). When Overall is
selected in the Channel Type menu item, you cannot select Symbol.

 Channel Type...: Select the channel type to be measured. When Symbol is

selected in the Measurement Level menu item, you can select MAC, Pilot,
Data, or Preamble. When Chip is selected in the Measurement Level menu
item, you can select Overall, MAC, Pilot, Data, or Preamble.

 PN Offset: Sets the PN of fset in units of 64 chips. You can set the value from

0 to 511.

 Select HalfSlot: Sets the half slot for the measurement.
 Select Code: Sets the code in the half slot for the measurement. This setting is

only available when Measurement Level is set to Symbol.

 Active Channel Threshold: Sets the active channel threshold level (in dB

from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -100 dB to 0 dB.

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 Measurement Filter...: Selects the measurement filter to apply when

calculating EVM and other modulation accuracy results. Y ou can select None,
cdma2000, or cdma2000+EQ (equalizer).

 IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
 Limits...: Sets the pass/fail limits for the modulation accuracy measurement.

When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-55 for more information.

Changing the View

Contents

You can change the view contents in the overview, subview, and main view using
the VIEW DEFINE menu. Press the View: DEFINE key to display the VIEW
DEFINE menu.

 Show Views: Selects the view style on the screen. You can sele ct Single or

Multi.

 Overview Content...: Selects a view to display in the overview. You can

select Spectrogram or Waveform (power versus time).

 Subview Content...: Selects a view to display in the subview:

 Spectrum: Displays spectrum of the measured signal.
 EVM: Displays changes of EVM (Error Vector Magnitude) over time.
 MagErr: Displays changes of magnitude error over time.
 PhaseErr: Displays changes of phase error over time.
 IQ Power Graph: Displays changes of I and Q powers over time. Refer

to IQ Power Graph Display on page 2-19.

 Constellation: Displays the signal as an I-Q constellation.

 Mainview Content...: Selects a view to display in the main view. You can

select Modulation Accuracy, EVM, MagErr , PhaseErr , or Symbol T able. Refer
to Scale and Format in the Main V iew on page 2-7 for more in formation about
the views.

 Menu Off: Hides the side menu. T o display the menu again, press the MENU

side key or VIEW: DEFINE key.

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Scale and Format in the

Main View

1: second half slot

This subsection describes the scale settings and display format in the main view.

Modulation Accuracy Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Modulation Accuracy from the Mainview Content
submenu, an IQ rectangular graph and the measured value for Rho, peak code
domain error, rms and peak EVM, magnitude error, phase error, frequency error,
IQ origin offset, and Tau (timing error) are displayed (see Figure 2-3).The peak
code domain error is displayed only when the Measurement Level menu item is set
to Symbol, and Tau is displayed only when an external trigger signal is applied.

Half slot number

0: first half slot

Number of preamble chips

Number of data chips

IQ rectangular graph

(Vector display)

Figure 2-3: Modulation accuracy display

You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.

 Measurement Content...: Selects vector or constellation display.

Vector: Selects vector display . A signal represented with phase and amplitude
is displayed in rectangular (I and Q) coordinates. The red point indicates the
symbol position on the measured signal, and the yellow trace indicates the
locus of the signal between symbols.

Constellation: Selects constellation display. It is the same as the vector
display, except that only symbols of the measured signal are indicated in red,
and the locus between symbols is not shown. The cross marks indicate symbol

positions of an ideal signal.

NOTE. I and Q signals are normalized to prevent the scale from changing when

signal attenuation changes.

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EVM Display. When you select Mainview Content from the VIEW DEFINE menu
and then select EVM from the Mainview Content submenu, changes of EVM
(Error Vector Magnitude) over time are displayed for each chip or symbol (see
Figure 2-4).

Symbol number

Horizontal Start

Code number and channel number

Vertical Scale

Vertical Start

Horizontal Scale

Figure 2-4: EVM display

You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.

 Auto Scale: Sets the start value and the scale of the vertical axis to display the

entire waveform.

 Horizontal Scale: Sets the scale of the horizontal axis (number of chips or

symbols).

 Horizontal Start: Sets the chip number or symbol number of the first (left)

value of the horizontal axis.

 Vertical Scale: Sets the scale of the vertical axis.
 Vertical Start: Sets the minimum (bottom) value of the vertical axis.
 Full Scale: Sets the scale of vertical axis to the default full-scale value.
 Measurement Content...: Selects the display content in the main view. You

can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.

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MagErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select MagErr from the Mainview Content submenu, changes of
magnitude error over time are displayed for each chip or symbol (see
Figure 2-5).

Symbol number

Horizontal Start

Code length and channel number

Vertical Scale

Horizontal Scale

Figure 2-5: MagErr display

You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.

 Auto Scale: Sets the start value and the scale of the vertical axis automatically

to display the entire waveform.

 Horizontal Scale: Sets the scale of the horizontal axis (number of chips or

symbols).

 Horizontal Start: Sets the chip number or symbol number of the first (left)

value of the horizontal axis.

 Vertical Scale: Sets the scale of the vertical axis.
 Vertical Offset: Sets the offset value of the vertical axis. Y ou can set the value

from -200% to 200%.

 Full Scale: Sets the scale of vertical axis to the default full-scale value.
 Measurement Content...: Selects the display content in the main view. You

can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.

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PhaseErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select PhaseErr from the Mainview Content submenu, changes of
phase error over time are displayed for each chip or symbol (see Figure 2-6).

Symbol number

Horizontal Start

Code length and channel number

Vertical Scale

Horizontal Scale

Figure 2-6: PhaseErr display

You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.

 Auto Scale: Sets the start value and the scale of the vertical axis automatically

to display the entire waveform.

 Horizontal Scale: Sets the scale of the horizontal axis (number of chips or

symbols).

 Horizontal Start: Sets the chip number or symbol number of the first (left)

value of the horizontal axis.

 Vertical Scale: Sets the scale of the vertical axis.
 Vertical Offset: Sets the offset value of the vertical axis. Y ou can set the value

from -450 to 450 degrees.

 Full Scale: Sets the scale of vertical axis to the default full-scale value.
 Measurement Content...: Selects the display content in the main view. You

can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.

Symbol Table Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Symbol Table from the Mainview Content

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submenu, the symbol table is displayed (see Figure 2-7). This display is only
available when the Measurement Level menu item is set to Symbol.

Code length and channel number

Symbol number

Channel type

Figure 2-7: Symbol table display

You can set the radix for the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.

 Radix...: Sets the radix for displaying the table. You can select Hex

(hexadecimal), Oct (octal), or Bin (binary).

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Code Domain Power Measurement

The code domain power measurement measures the distribution of signal power
across the set of code channels, normalized to the total signal power. This
measurement allows you to verify that each code channel is operating at its proper
level. Figure 2-8 shows an example of the code domain power measurement.

Figure 2-8: Code domain power measurement

Display Elements

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The following information is shown in the code domain power measurement
display:

 Overview: This view can contain power versus time or spectrogram.
 Subview: This view can contain spectrum, EVM, magnitude error, phase

error, IQ power graph, and constellation .

 Main view: This view can contain code domain power , power codogram, and

IQ power graph.

The display contents in each view can be changed using the VIEW DEFINE menu.
Refer to Changing the V iew Co ntents on page 2-14 for more information about the
VIEW DEFINE menu.