Tektronix WCA230A, WCA280A User Manual

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User Manual

WCA230A & WCA280A Option 27 3GPP Release 5 Downlink (HSDPA) Analysis Software

071-1509-02

This document supports firmware version 3.30 and above.

www.tektronix.com

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Contacting Tektronix

Tektronix, Inc. 14200 SW Karl Braun Drive P.O . B ox 5 0 0 Beaverton, OR 97077 USA

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

 In North America, call 1-800-833-9200.  Worldwide, visit www.tektronix.com to find contacts in your area.

Warranty 2

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 will 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 WITH 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.

Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1ix

About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1ix

Related Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1ix

Getting Started

Analysis Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Measurement Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Operating Basics

Uplink/Downlink Analysis in the S/A Mode . . . . . . . . . . . . . . . . . . . . . . . 2-1

Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

ACLR Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Multi-Carrier ACLR Measurement

Downlink Analysis Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Spectrum Emission Mask Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

OBW Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

EBW Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Carrier Frequency Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Editing the Measurement Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Downlink Analysis in the Demod Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

Measurement Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25

Scale and Format of View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

Code Domain Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

Power Codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33

Code Power versus Time Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35

Code Power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37

Symbol Constellation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39

Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40

Symbol Eye Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

Symbol Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43

Modulation Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44

Uplink Analysis in the Demod Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45

Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46

Measurement Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-48

Display Method for HS-DPCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51

Scale and Format of View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54

Code Domain Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57

Power Codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59

Code Power versus Time Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61

Code Power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63

Symbol Constellation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65

Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66

WCA230A & WCA280A Option 27 User Manual

Table of Contents

Syntax and Commands

Symbol Eye Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68

Symbol Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69

Modulation Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-70

ACK/NACK Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71

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

Functional Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

:CONFigure Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

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

:FETCh Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

:MMEMory Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

:READ Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

:SENSe Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

:CONFigure Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

:DISPlay Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

:FETCh Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53

:MMEMory Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-77

:READ Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-81

:SENSe Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95

Appendices

Index

Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

GPIB Command Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Measurement Limit Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Scale Setting Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

WCA230A & WCA280A Option 27 User Manual

List of Figures

Figure 1-1: Measurement menus for the 3GPP-R5 analysis . . . . . . . . . . . . . . . . . 1-5

Figure 2-1: Measurement menu in the S/A mode . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Figure 2-2: Channel power measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-3: 3GPP-R5 ACLR measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-4: 3GPP-R5 ACLR measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-5: Spectrum emission mask measurement . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 2-6: OBW measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11

Figure 2-7: EBW measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-8: Carrier frequency measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13

Figure 2-9: Measurement limits editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14

Figure 2-10: Spectrum emission mask measurement limits editor . . . . . . . . . . 2-16

Figure 2-11: Downlink analysis measurement menu in the Demod mode . . . . . 2-21

Figure 2-12: Example of the code domain power measurement . . . . . . . . . . . . 2-24

Figure 2-13: Time slot table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28

Figure 2-14: Code domain power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31

Figure 2-15: Power codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33

Figure 2-16: Code domain power versus Time slot . . . . . . . . . . . . . . . . . . . . . . . 2-35

Figure 2-17: Code domain power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . 2-37

Figure 2-18: Symbol constellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39

Figure 2-19: Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40

Figure 2-20: Symbol eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42

Figure 2-21: Symbol table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43

Figure 2-22: Modulation accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44

Figure 2-23: Uplink analysis measurement menu in the Demod mode . . . . . . . 2-45

Figure 2-24: Example of the code domain power measurement . . . . . . . . . . . . 2-47

Figure 2-25: Subframe offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50

Figure 2-26: HS-DPCCH display method (Code domain power) . . . . . . . . . . . . 2-51

Figure 2-27: HS-DPCCH display method (Code power versus Symbol) . . . . . . 2-52

Figure 2-28: HS-DPCCH display method (ACK/NACK analysis) . . . . . . . . . . . 2-53

Figure 2-29: Time slot table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54

Figure 2-30: Code domain power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57

Figure 2-31: Power codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59

Figure 2-32: Code domain power versus Time slot . . . . . . . . . . . . . . . . . . . . . . . 2-61

Figure 2-33: Code domain power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . 2-63

Figure 2-34: Symbol constellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65

Figure 2-35: Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66

Figure 2-36: Symbol eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68

Figure 2-37: Symbol table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69

Figure 2-38: Modulation accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-70

Figure 2-39: ACK/NACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71

WCA230A & WCA280A Option 27 User Manual

iii

List of Tables

Table 1-1: Additional functions in Option 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Table 1-2: 3GPP-R5 downlink transmission parameters . . . . . . . . . . . . . . . . . . . . 1-2

Table 1-3: 3GPP-R5 uplink transmission parameters . . . . . . . . . . . . . . . . . . . . . . 1-3

Table 2-1: Measurement limits settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15

Table 2-2: Limit settings for the spectrum emission mask measurement . . . . . . 2-17

Table 2-3: Vertical scale setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41

Table 2-4: Vertical scale setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67

Table 3-1: Measurement modes added in Option 27 . . . . . . . . . . . . . . . . . . . . . . . 3-1

Table 3-2: List of command groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

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

Table 3-4: :DISPlay commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Table 3-5: :FETCh commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

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

Table 3-7: :READ commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Table 3-8: :SENSe commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Table 3-9: :DISPlay command subgroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Table 3-10: Symbol rate settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Table 3-11: Main view display formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Table 3-12: Symbol rate settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40

Table 3-13: Main view display formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44

Table 3-14: Queried information on the 3GPP-R5 downlink analysis results . . 3-55

Table 3-15: Queried information on the 3GPP-R5 uplink analysis results . . . . 3-72

Table 3-16: :SENSe command subgroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95

Table A-1: Factory initialization settings, :DISPlay commands . . . . . . . . . . . . . A-1

Table A-2: Factory initialization settings, :SENSe commands . . . . . . . . . . . . . . A-2

Table A-3: Common limits (Band I, II, and III) . . . . . . . . . . . . . . . . . . . . . . . . . . A-3

Table A-4: SEM limits in Band I and III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

Table A-5: SEM limits in Band II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4

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

WCA230A & WCA280A Option 27 User Manual

Preface

About This Manual

Related Manuals

This manual provides operating instructions for the WCA230A and WCA280A Portable Wireless Communication Analyzers Option 27 3GPP Release 5 Downlink (HSDPA) analysis software.

This manual is composed of the following sections:

 Getting Started describes the overview of the 3GPP Release 5 analysis.

 Operating Basics explains the menu functions and measurement procedures.

 Syntax and Commands describes GPIB commands for Option 27.

 Appendix provides additional information including factory default settings

and scale setting range.

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 to

quickly describe 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 Analyzer

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 27 User Manual

Preface

WCA230A & WCA280A Option 27 User Manual

Getting Started

The WCA230A and WCA280A Option 27 3GPP Release 5 Downlink (HSDPA) analysis software enables modulation analysis of HSDPA (High Speed Downlink Packet Access) signals defined in 3GPP (3

Generation Partnership Project) Release 5 (“3GPP-R5”). Measurements may be performed on downlink QPSK and 16QAM or uplink BPSK signals.

Table 1-1 summarizes the functions added in Option 27 by the measurement modes of the analyzer.

Table 1-1: Additional functions in Option 27

Measurement mode Additional functions

S/A (spectrum analysis) 3GPP-R5 downlink/uplink analysis



Channel power



ACLR (Adjacent Channel Leakage Power Ratio)



MC-ACLR (Multi-Carrier ACLR, downlink analysis only)



Spectrum emission Mask



OBW (Occupied Bandwidth)



EBW (Emission Bandwidth)



Carrier frequency

Demod (modulation analysis) 3GPP-R5 downlink/uplink analysis



Code domain power



Power codogram



Code power versus Time slot



Code power versus Symbol



Symbol constellation



Symbol EVM (Error Vector Magnitude)



Symbol eye diagram



Symbol table



Modulation accuracy



ACK/NACK analysis (uplink analysis only)

Time (time analysis) None

NOTE.

The ACK/NACK analysis requires Option 23 W-CDMA Uplink Analysis

Software.

WCA230A & WCA280A Option 27 User Manual

1-1

Getting Started

Analysis Definition

The analyzer performs measurements according to 3GPP-R5 specifications.

Downlink Analysis

Table 1-2 shows the 3GPP-R5 downlink transmission parameters for the analyzer.

Table 1-2: 3GPP-R5 downlink transmission parameters

Item Description

Chip rate 3.84 Mcps Symbol rate 7.5, 15, 30, 60, 120, 240, 480, and 960 ksps Maximum number of channels 512 Frame structure Time slot: 666.7 Scrambling code Gold code using M series by generator polynomial 18 bits Channelization code Hierarchical orthogonal code series based on the

combination of chip rate and symbol rate Modulation method for each channel QPSK or 16QAM Baseband filter Root-cosine with

Can be set in the range of 0.0001

Measurement Functions.

 Code domain power: Measures the power relative to the total power for each

The analyzer has the following measurement functions:

= 0.22 (default)

≤α ≤

channel. Multi-rate is supported and up to 512 channels can be measured.

 Code domain power versus Time: Measures the relative power at symbol points

for each channel in time series.

1-2

 Power codogram: Measures the code domain power continuously for up to

150 slots (0.1 sec) and displays a spectrogram for each slot.

 Vector/Constellation: Measures the vector loci and chip points for all signals

as well as constellation at symbol points for each channel.

 Modulation accuracy: Measures EVM (Error Vector Magnitude), amplitude

and phase errors, waveform quality, and origin offset for each channel. Measures PCDE (Peak Code Domain Error), amplitude, frequency, and phase errors; waveform quality; and origin offset for each time slot.

WCA230A & WCA280A Option 27 User Manual

Getting Started

Uplink Analysis

Measurement Process.

The following steps show the internal process for the

3GPP-R5 downlink analysis:

1. Perform flatness correction and filtering.

2. Establish the synchronization with P-SCH.

3. Determine the range of scrambling code numbers with S-SCH.

4. Fix the scrambling code number and the phase.

5. Correct the frequency and the phase.

6. Perform high-speed Hadamard transformation.

7. Calculate the power for each symbol on all channels.

The analyzer supports the following types of 3GPP-R5 uplink signals:

 DPDCH (Dedicated Physical Data Channel)

 DPCCH (Dedicated Physical Control Channel)

 HS-DPCCH (Dedicated Physical Control Channel for High-Speed

Downlink Shared Channel (HS-DSCH))

The analyzer covers the 3GPP-R5 uplink transmission parameters listed in Tab le 1-3 .

Table 1-3: 3GPP-R5 uplink transmission parameters

Item DPDCH DPCCH HS-DPCCH

Chip rate 3.84 Mcps Symbol rate 15, 30, 60, 120, 240,

480, and 960 ksps

Maximum number of channels

Frame structure 15 time-slots, 10 ms 15 time-slots, 10 ms 5 sub-frames, 10 ms Time slot 2560 chips, 667 Scrambling code Long or short. Number: 0 to 16,777,215 Modulation method for

each channel Baseband filter Root-cosine with

611

Can be set in the range of 0.0001

15 ksps 15 ksps

BPSK

= 0.22 (default).

≤α ≤

WCA230A & WCA280A Option 27 User Manual

1-3

Getting Started

Measurement Functions.

 ACK/NACK analysis: Measures the HS-DPCCH to detect and display the

The analyzer has the following measurement functions:

ACK/NACK indicator, DTX (Discontinuous Transmission), and CQI (Channel Quality Indicator).

 Code domain power: Measures the power relative to the total power for each

channel. Multi-rate is supported and up to 512 channels can be measured.

 Power codogram: Measures the code domain power continuously for up to

150 slots (0.1 sec) and displays spectrogram for each slot.

NOTE.

The code domain power and the power codogram can be displayed in the

subview only.

Measurement Process.

The following steps show the internal process for the

3GPP-R5 uplink analysis:

1. Perform flatness correction and filtering.

2. Search for a synchronous point by de-spreading DPCCH.

3. Correct the frequency and phase.

4. Obtain symbols for each channel of DPDCH and DPCCH, and calculate power

for each symbol.

NOTE.

using the frequency and phase to establish synchronization. If the level of DPCCH or the control part is much lower than (about 1/10

The analyzer de-spreads DPCCH and the control part of an input signal,

) the level of the other channels

(DPDCH or the data part), the analysis may not be performed accurately.

1-4

WCA230A & WCA280A Option 27 User Manual

Measurement Menu

Getting Started

Figure 1-1 shows the measurement menus related to the 3GPP-R5 analysis.

MODE

S/A

DEMOD

TIME

Measure menu items

Standard... 3GPP-R5-DL * Channel Power

3GPP-R5-UL *

Standard... 3GPP-R5-DL * Code Domain Power

3GPP-R5-UL * Code Domain Power

ACLR Spectrum Emission Mask OBW EBW Carrier Frequency MC-ACLR

Channel Power ACLR Spectrum Emission Mask OBW EBW Carrier Frequency

Power Codogram Code Power versus Time Slot Code Power versus Symbol Symbol Constellation Symbol EVM Symbol Eye Diagram Symbol Table Modulation Accuracy

Power Codogram Code Power versus Time Slot Code Power versus Symbol Symbol Constellation Symbol EVM Symbol Eye Diagram Symbol Table Modulation Accuracy ACK/NACK Analysis

Figure 1-1: Measurement menus for the 3GPP-R5 analysis

For the CCDF (Complementary Cumulative Distribution Function) analysis in Time mode, refer to the WCA230A and WCA280A User Manual (Tektronix part number 071-1253-XX).

NOTE.

If you are not familiar with the operation of the analyzer, refer to the

WCA230A and WCA280A User Manual (Tektronix part number 071-1253-XX).

WCA230A & WCA280A Option 27 User Manual

CCDF (Standard)

* DL and UL represent downlink and uplink, respectively.

1-5

Getting Started

1-6

WCA230A & WCA280A Option 27 User Manual

Operating Basics

Uplink/Downlink Analysis in the S/A Mode

This section describes the basic operation of 3GPP-R5 uplink/downlink analysis in the S/A (Spectrum Analysis) mode. You can access the measurement items by pressing S/A →Standard... →3GPP-R5-DL (downlink) or 3GPP-R5-UL (uplink) as shown in Figure 2-1.

MODE

S/A

DEMOD

TIME

Standard... 3GPP-R5-DL * Channel Power

3GPP-R5-UL *

* DL and UL represent downlink and uplink, respectively.

Measure menu items

ACLR Spectrum Emission Mask OBW EBW Carrier Frequency MC-ACLR

Channel Power ACLR Spectrum Emission Mask OBW EBW Carrier Frequency

Figure 2-1: Measurement menu in the S/A mode

WCA230A & WCA280A Option 27 User Manual

2-1

Uplink/Downlink Analysis in the S/A Mode

Measurement Procedure

Use the following procedure to take a spectrum measurement in S/A mode.

NOTE.

For details on setting frequency, span, and amplitude, refer to the

WCA230A and WCA280A User Manual (Tektronix part number 071-1253-XX).

1. Press the S/A key on the front panel.

2. Press the side key: Standard... →3GPP-R5-DL (for downlink) or 3GPP-R5-UL (for uplink).

3. Press the FREQUENCY/CHANNEL key on the front panel to set frequency.

If you use the channel table, do these steps:

 Press the Channel Table... side key and select W-CDMA-DL (for

downlink) or W-CDMA-UL (for uplink).

 Press the Channel side key and select a channel by turning the general

purpose knob.

The center frequency is set to the value corresponding to the channel.

4. Press the SPAN key on the front panel and set span.

5. Press the AMPLITUDE key on the front panel and set amplitude

appropriately.

NOTE.

If the input level is too high, A/D OVERFLOW displays in the red box at the

center top of the screen. If this occurs, raise the reference level.

2-2

6. Press the MEASURE key on the front panel and select a measurement item:

 Channel Power

 ACLR (Adjacent Channel Leakage Power Ratio)

 Spectrum Emission Mask

 OBW (Occupied Bandwidth)

 EBW (Emission Bandwidth)

 Carrier Frequency

 MC-ACLR (Multi-Carrier ACLR, downlink analysis only)

NOTE.

Refer to the WCA230A and WCA280A User Manual for information on

scaling the views.

The following sections explain each measurement.

WCA230A & WCA280A Option 27 User Manual

Channel Power Measurement

The channel power measurement measures the channel power within a specified bandwidth and the power spectral density in dBm/Hz.

After selecting Channel Power in the procedure described on page 2-2, set the parameters in the Meas Setup menu as follows.

Uplink/Downlink Analysis in the S/A Mode

Measurement Setup Menu

The Meas Setup menu for the channel power measurement contains the following controls:

Channel Bandwidth.

Sets the frequency range for the measurement using the band

power marker (see Figure 2-2). Range: 50 kHz to 20 MHz (default: 3.84 MHz).

Measurement Filter Shape...

 Rect (Rectangular, default)

 Gaussian

 Nyquist

 Root Nyquist

Rolloff Ratio.

Sets the roll-off ratio when the Measurement Filter Shape is

Selects the filter to be used for the measurement:

Nyquist or Root Nyquist. Range: 0.0001 to 1 (default: 0.5).

Limits...

Sets the pass/fail limit for the channel power measurement.

When pressing this side key, the measurement limits editor appears. Refer to Editing the Measurement Limits on page 2-14 for more information.

WCA230A & WCA280A Option 27 User Manual

2-3

Uplink/Downlink Analysis in the S/A Mode

Figure 2-2 shows an example of the channel power measurement.

Channel Bandwidth

Figure 2-2: Channel power measurement

2-4

WCA230A & WCA280A Option 27 User Manual

ACLR Measurement

Uplink/Downlink Analysis in the S/A Mode

The ACLR (Adjacent Channel Leakage Power Ratio) measurement according to the 3GPP-R5 standard is based on the ACPR measurement function in the normal spectrum analysis. For the basics, refer to ACPR Measurement in the WCA230A and WCA280A User Manual.

The following settings are fixed according to the 3GPP-R5 standard:

Span: 25 MHz Main channel measurement bandwidth (Main Chan BW): 3.84 MHz Adjacent channel measurement bandwidth (Adj Chan BW): 3.84 MHz Channel spacing (Chan Spacing): 5 MHz

After selecting ACLR in the procedure described on page 2-2, set the parameters in the Meas Setup menu as follows.

Measurement Setup Menu

The Meas Setup menu for the ACLR measurement contains the following controls:

Measurement Filter Shape...

 Rect (rectangle)

 RootNyquist (Root Nyquist, default)

Rolloff Ratio.

Range: 0.0001 to 1 (default: 0.22)

2nd Adj Channel Gain.

normally much smaller than the main channel, measurement with the same gain causes a larger error. To enhance accuracy, raise the gain of the second adjacent channel inside the analyzer. Set the gain value here.

Range: 3 to 15 dB (default: 5 dB)

NOTE.

amplitude settings and/or calibration results. This gain setting does not affect the waveform display.

Limits...

side key, the measurement limits editor appears. Refer to Editing the Measurement Limits on page 2-14 for more information.

Sets the roll-off value when the filter is Root Nyquist.

The upper limit of the range may be smaller than 15 dB, depending on

Sets the pass/fail limit for the ACLR measurement. When you press this

Selects a filter shape:

Because the power of the second adjacent channel is

NOTE.

same limits setting.

WCA230A & WCA280A Option 27 User Manual

The ACLR measurement and the multi-carrier ACLR measurement use the

2-5

Uplink/Downlink Analysis in the S/A Mode

Figure 2-3 shows an example of the ACLR measurement. Measured values are displayed in the lower part of the screen.

Main Upper1 Upper2Lower1Lower2

Figure 2-3: 3GPP-R5 ACLR measurement

2-6

WCA230A & WCA280A Option 27 User Manual

Multi-Carrier ACLR Measurement

Downlink Analysis Only

The multi-carrier ACLR (Adjacent Channel Leakage Power Ratio) measurement is performed according to the 3GPP-R5 standard. You can measure the power levels of up to four carriers and the ratio of each adjacent channel (a total of four channels) to the power of the main channel. The measurement is based on the ACPR measurement function in the normal spectrum analysis. For the basics, refer to ACPR Measurement in the WCA230A and WCA280A User Manual.

The following settings are fixed according to the 3GPP-R5 standard:

Span: 55 MHz Main channel measurement bandwidth (Main Chan BW): 3.84 MHz Adjacent channel measurement bandwidth (Adj Chan BW): 3.84 MHz Channel spacing (Chan Spacing): 5 MHz

After selecting MC-ACLR in the procedure described on page 2-2, set the parameters in the Meas Setup menu as follows.

Uplink/Downlink Analysis in the S/A Mode

Measurement Setup Menu

The Meas Setup menu for the multi-carrier ACLR measurement contains the following controls:

Carrier Threshold.

is indicated by a horizontal line in blue as shown in Figure 2-4. Range: −30 to −1 dBc relative to the power of the main channel (default: −10 dBc).

Measurement Filter Shape...

 Rect (Rectangular)

 Root Nyquist (default)

Rolloff Ratio.

Range: 0.0001 to 1 (default: 0.22)

Limits...

When you press this side key, the measurement limits editor appears. Refer to Editing the Measurement Limits on page 2-14 for more information.

NOTE.

same limits setting.

Sets the pass/fail limit for the multi-carrier ACLR measurement.

The ACLR measurement and the multi-carrier ACLR measurement use the

Sets the threshold level to detect the carrier. The threshold level

Selects a filter shape.

Sets the roll-off value when the filter is Root Nyquist.

WCA230A & WCA280A Option 27 User Manual

2-7

Uplink/Downlink Analysis in the S/A Mode

Figure 2-4 shows an example of the multi-carrier ACLR measurement. There are four carriers. On the bottom of the screen, the measurement results of the channel power and ACLR are displayed. The channel at the center frequency (Ch 2 in this case) is the main channel, which is indicated as “Main” in green in the measurement results. The all channels are located at 5 MHz intervals according to the standard.

Ch1 Ch2 Ch3 Ch4

Carrier Threshold

Measurement results

adjacent

channels

P (Pass) / F (Fail)

CarriersLower

Figure 2-4: 3GPP-R5 ACLR measurement

NOTE.

If there is no carrier in the main channel, the error message “No carrier”

will appear.

Upper

adjacent

channels

Main channel

2-8

If there are more than four carriers in the span, the error message “Too many carriers” will appear.

WCA230A & WCA280A Option 27 User Manual

Spectrum Emission Mask Measurement

The spectrum emission mask measurement verifies that the base station is not transmitting excessive power outside of its designated channel.

Uplink/Downlink Analysis in the S/A Mode

Measurement Setup Menu

NOTE.

When performing this measurement, be sure to apply a continuous active

slot signal or a continuous idle slot signal.

After selecting Spectrum Emission Mask in the procedure described on page 2-2, set the parameters in the Meas Setup menu as follows.

The Meas Setup menu for the spectrum emission mask measurement contains the following controls:

Ref. Channel Select.

 Auto. The level is determined automatically by evaluating the spectrum trace.

 Man. The level is set by the Ref. Channel Level just below.

Ref. Channel Level.

Selects how to determine the reference channel level.

Sets the reference channel level to be used by the measurement

when Ref. Channel Select is set to Man. Range: −150 to 30 dBm (default: 0 dBm).

Channel Bandwidth.

Defines the frequency window occupied by the

reference channel. Range: 1 to 10 MHz (default: 3.84 MHz).

Measurement Filter Shape...

Selects the filter shape to be used when measuring the

reference channel when Ref. Channel Select is set to Auto.

 Rect (Rectangular, default)

 Gaussian

 Nyquist

 Root Nyquist

Rolloff Ratio.

Sets the rolloff ratio when Measurement Filter Shape is set to

Nyquist or Root Nyquist. Range: 0.0001 to 1 (default: 0.5).

Limits...

Sets the pass/fail limit for the spectrum emission mask measurement.

When pressing this side key, the measurement limits editor appears. Refer to Editing the Measurement Limits on page 2-14 for more information.

Scroll Table.

Step Size.

Scrolls the results table on screen using the general purpose knob.

Sets the step size for the Channel Bandwidth setting.

WCA230A & WCA280A Option 27 User Manual

2-9

Uplink/Downlink Analysis in the S/A Mode

Figure 2-5 shows an example of the spectrum emission mask measurement.

Defined by the measurement limits editor (from the left)

■

Zone (A to E)

■

Side (upper or lower)

■

Start frequency of the zone

■

Stop frequency of the zone

■

MBW (Measurement Bandwidth (RBW))

Measurement results (P: Pass; F: Fail) (from the left)

■

Absolute peak value and Pass/Fail

■

Relative peak value and Pass/Fail

Figure 2-5: Spectrum emission mask measurement

2-10

WCA230A & WCA280A Option 27 User Manual

OBW Measurement

Uplink/Downlink Analysis in the S/A Mode

The OBW (Occupied Bandwidth) measurement measures the frequency bandwidth using the ratio you specify for carrier signal power over power within the set span.

After selecting OBW in the procedure described on page 2-2, set the parameters in the Meas Setup menu as follows.

Measurement Setup Menu

The Meas Setup menu for the OBW measurement contains the following controls:

Power Ratio.

calculating OBW. Range: 80 to 99.99% (default: 99%).

Limits...

When pressing this side key, the measurement limits editor appears. Refer to Editing the Measurement Limits on page 2-14 for more information.

Figure 2-6 shows an example of the OBW measurement.

Specifies the power ratio of the carrier and span regions for

Sets the pass/fail limits for the OBW measurement.

Occupied Bandwidth

Figure 2-6: OBW measurement

WCA230A & WCA280A Option 27 User Manual

2-11

Uplink/Downlink Analysis in the S/A Mode

EBW Measurement

The frequency bandwidth between the maximum peak of spectrum and the specified dB value is measured in EBW (Emission Bandwidth).

After selecting EBW in the procedure described on page 2-2, set the parameters in the Meas Setup menu as follows.

Measurement Setup Menu

The Meas Setup menu for the EBW measurement contains the following controls:

Measurement Level.

measured (see Figure 2-7). Range: −100 to −1 dB (default: −30 dB).

Figure 2-7 shows an example of the EBW measurement.

Specifies how far down from the peak level the bandwidth is

Emission Bandwidth

Measurement Level

2-12

Figure 2-7: EBW measurement

WCA230A & WCA280A Option 27 User Manual

Carrier Frequency Measurement

Carrier frequency is accurately measured using the counter function.

Uplink/Downlink Analysis in the S/A Mode

Measurement Setup Menu

NOTE.

roughly the frequency of a 3GPP signal. Use the modulation analysis function (Demod mode) to measure accurately the 3GPP signal.

After selecting Carrier Frequency in the procedure described on page 2-2, set the parameters in the Meas Setup menu as follows.

The Meas Setup menu for the carrier frequency measurement contains the following controls:

Counter Resolution.

displayed on the bottom of the view with this resolution. Range: 1 mHz to 1 MHz in a tenfold sequence (default: 1 Hz).

Figure 2-8 shows an example of the carrier frequency measurement.

The carrier frequency measurement function should be used to estimate

Sets the counter resolution. The measurement result is

Figure 2-8: Carrier frequency measurement

WCA230A & WCA280A Option 27 User Manual

2-13

Uplink/Downlink Analysis in the S/A Mode

Editing the Measurement Limits

This section describes how to set measurement limits that can be used to perform pass/fail testing for the following measurements in the S/A mode:

 Channel power

 ACLR

 Spectrum emission mask

 OBW

Refer to Appendix A: Measurement Limit Defaults for information about the default settings of each measurement limit.

Using the Measurement

Limits Editor

All of the measurement limits are set in the measurement limits editor. You can access it from the Limits... side key on the Meas Setup menu. Figure 2-9 shows the measurement limits editor for the 3GPP-R5 downlink analysis in the S/A mode.

2-14

Figure 2-9: Measurement limits editor

WCA230A & WCA280A Option 27 User Manual

Uplink/Downlink Analysis in the S/A Mode

Table 2-1 describes all of the measurement limit items available in the measurement limits editor.

Table 2-1: Measurement limits settings

Limit item Description Lower limit range Upper limit range

Channel Power Sets the lower and upper limits for the Channel Power

measurement.

SEM Offset From Channel Select this item to access another measurement limits

editor to edit SEM offset from channel limits.

OBW Sets the upper and lower limits for the OBW

measurement.

ACLR 1st Lower Channel Sets the upper limit for the first lower channel in the

ACLR measurement.

ACLR 1st Upper Channel Sets the upper limit for the first upper channel in the

ACLR measurement.

ACLR 2nd Lower Channel Sets the upper limit for the second lower channel in the

ACLR measurement.

ACLR 2nd Upper Channel Sets the upper limit for the second upper channel in

the ACLR measurement.

−

200 to +200 dBm

Refer to page 2-16 for the details.

0 to 30 MHz 0 to 30 MHz

- 0 to 70 dB

−

200 to +200 dBm

Setting Measurement

Limits

Perform the following procedure to set measurement limits:

1. Press the MEAS SETUP menu key to open the Meas Setup menu.

2. Press the Limits... side key to open the measurement limits editor with the

LIMITS menu.

3. Press the Select row to edit side key.

4. Turn the general purpose knob (or press the arrow keys just above the knob) to

select the row that you want to edit.

5. Press the Enable Limit side key to enable or disable the Pass/Fail testing for

the specified limit(s).

6. Press the Lower Limit side key and set the lower limit for the selected

measurement item, if applicable.

7. Press the Upper Limit side key and set the upper limit for the selected

measurement item.

8. If you want to use a given measurement limit set for the frequency band of

Band I, II, or III defined in 3GPP-R5, press the Default all limits to... side key and then select the band. Refer to Appendix A: Measurement Limit Defaults for information about the default settings of each measurement limit.

WCA230A & WCA280A Option 27 User Manual

2-15

Uplink/Downlink Analysis in the S/A Mode

When you set limits for the spectrum emission mask measurement, perform the following steps to open another limits editor:

1. Press the Select row to edit side key.

2. Turn the general purpose knob (or press the arrow keys just above the knob) to select the SEM Offset From Channel row in the table.

3. Press the Edit SEM Offset Limits... side key.

This opens the measurement limits editor to specify the detail of the limits for the spectrum emission mask measurement. For more information, refer to the following section, Setting the Spectrum Emission Mask Limits.

Setting the Spectrum

Emission Mask Limits

When you select the SEM Offset From Channel row in the measurement limits editor and then press the Edit SEM Offset Limits... side key, another limits editor for the spectrum emission mask measurement is displayed as shown in Figure 2-10.

Zone A

2-16

Figure 2-10: Spectrum emission mask measurement limits editor

WCA230A & WCA280A Option 27 User Manual

Uplink/Downlink Analysis in the S/A Mode

Table 2-2 lists the measurement limit items that can be set in the measurement limits editor.

Table 2-2: Limit settings for the spectrum emission mask measurement

Item Description Limit ranges

Enable Enables or disables use of the mask in the specified zone (A, B, C, D, or E). Beginning Frequency Sets the beginning frequency relative to the center frequency for the zone. Ending Frequency Sets the ending frequency relative to the center frequency for the zone. Measurement Bandwidth Sets the measurement RBW (Resolution Bandwidth) for the zone. Offset from Carrier Specifies which offset side is to be measured.

You can select Upper (positive), Lower (negative), or Both.

Fail if signal exceeds Selects the fail mode to detect failure conditions between the measurement

results and the test limits. The choices are:

■

Absolute: Failure is detected when one of the absolute measurement results is larger than the Beginning Absolute Limit and/or Ending Absolute Limit.

■

Relative: Failure is detected when one of the relative measurement results is larger than the Beginning Relative Limit and/or Ending Relative Limit.

−

8 to 8 GHz

−

8 to 8 GHz

−

8 to 8 GHz

■

Rel OR Abs: Failure is detected when one of the absolute measurement results is larger than the Beginning Absolute Limit and Ending Absolute Limit OR one of the relative measurement results is larger than the Beginning Relative Limit and Ending Relative Limit.

■

Rel AND Abs: Failure is detected when one of the absolute measurement results is larger than the Beginning Absolute Limit and Ending Absolute Limit AND one of the relative measurement results is larger than the Beginning

Relative Limit and Ending Relative Limit. Beginning Absolute Limit Sets an absolute level limit at Beginning Frequency. Ending Absolute Limit Sets an absolute level limit at Ending Frequency. Beginning Relative Limit Sets a relative level limit at Beginning Frequency. Ending Relative Limit Sets a relative level limit at Ending Frequency.

−

200 to 200 dBm

−

200 to 200 dBm

−

200 to 200 dBc

−

200 to 200 dBc

WCA230A & WCA280A Option 27 User Manual

2-17

Uplink/Downlink Analysis in the S/A Mode

Perform the following steps to set measurement limits in the limits editor:

1. Press the Select column to edit side key.

2. Turn the general purpose knob (or press the arrow keys just above the knob) to

select the column that you want to edit.

3. Press the Enable side key to enable or disable use of the limits for the zone.

4. Press the side key corresponding to the limit item, and then use the general

purpose knob or the arrow keys to set the value.

5. If you want to use a given measurement limit set for the frequency band of Band I, II, or III defined in 3GPP-R5, press the Default limits to... side key and then select the band. Refer to Appendix A: Measurement Limit Defaults for information about the default settings of each measurement limit.

6. When you press the Rescale Graph side key, the graph is rescaled to match the set limits.

2-18

WCA230A & WCA280A Option 27 User Manual

Uplink/Downlink Analysis in the S/A Mode

Saving and Loading

Measurement Limits

Measurement limits that set in the limits editor can be saved to a file and loaded from a file. This section describes how to save and load measurement limits.

Refer to the WCA230A and WCA280A User Manual for further information about file operation including how to enter a file name and how to delete a file.

Saving the Limits.

1. When you open the spectrum emission mask measurement limits editor, press

the Cancel-Back (MENU) side key to return the measurement limit editor (see Figure 2-9 on page 2-14).

2. Press the Save Limits side key to open the Save to File menu.

You can save the limits by using the preset file name or by entering a new file name.

3. To use the preset file name, press one of the following side keys:

Save to LimitsA, Save to LimitsB, or Save to LimitsC.

4. To enter a new file name, type a file name in the text box at the top of the menu,

and then press the Save File Now side key.

The file extension *.lmt is automatically added to the limits file.

Perform the following steps to save the current limits to a file:

Loading the Limits.

1. When you open the spectrum emission mask measurement limits editor, press

the Cancel-Back (MENU) side key to return the measurement limit editor (see Figure 2-9 on page 2-14).

2. Press the Load Limits side key to open the Load From File menu.

3. To load limits from the preset file, press one of the following side keys:

Load from LimitsA, Load from LimitsB, or Load from LimitsC.

4. To load limits from an existing file, select the file from the file list, and then

press the Load File Now side key.

Perform the following steps to load the limits from a file:

WCA230A & WCA280A Option 27 User Manual

2-19

Uplink/Downlink Analysis in the S/A Mode

2-20

WCA230A & WCA280A Option 27 User Manual

Downlink Analysis in the Demod Mode

This section describes the basic operation of the 3GPP-R5 downlink analysis in the Demod (Modulation Analysis) mode. You can access the measurement items by pressing DEMOD →Standard... → 3GPP-R5-DL as shown in Figure 2-11.

MODE

S/A

DEMOD

TIME

Figure 2-11: Downlink analysis measurement menu in the Demod mode

Standard... 3GPP-R5-DL

Measure menu items

Code Domain Power Power Codogram Code Power versus Time Slot Code Power versus Symbol Symbol Constellation Symbol EVM Symbol Eye Diagram Symbol Table Modulation Accuracy

The measurement in the Demod mode is based on the digital modulation analysis function. For the digital modulation analysis, refer to the WCA230A and WCA280A

User Manual.

WCA230A & WCA280A Option 27 User Manual

2-21

Downlink Analysis in the Demod Mode

Measurement Procedure

The following procedure shows you how to acquire data of multiple slots in advance, measure continuous data, and obtain continuous code domain power:

NOTE.

WCA230A and WCA280A User Manual.

1. Press the DEMOD key on the front panel.

2. Press the side key Standard... →3GPP-R5-DL.

3. Press the FREQUENCY/CHANNEL key on the front panel to set frequency.

4. Press the SPAN key on the front panel to set the span.

5. Press the AMPLITUDE key on the front panel to set the amplitude

NOTE.

center top of the screen. If this occurs, raise the reference level.

6. Press the TIMING key on the front panel and then the Acquisition Length

For details on setting frequency, span, and amplitude, refer to the

If you use the channel table, do these steps:

a. Press the Channel Table... side key and select W-CDMA-DL.

b. Press the Channel side key and select a channel by rotating the general

purpose knob.

The center frequency is set to the value corresponding to the channel.

appropriately.

If the input level is too high, A/D OVERFLOW displays in the red box at the

side key to set the time length to acquire one block.

2-22

Suppose that one block contains M frames; the acquisition length is calculated with this equation:

(One block acquisition length) = M × (One frame acquisition length)

One frame acquisition length is determined by span and indicated on the Spectrum Length side key.

The number of frames M required for measuring N slots must meet the following condition:

M > K × (N + 1.2) + 1

where K =16.7 (for the span of 20 MHz and 15 MHz)

8.34 (for the span of 10 MHz)

4.17 (for the span of 5 MHz)

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Downlink Analysis in the Demod Mode

7. After acquiring measurement data, stop the data acquisition. If you are

acquiring data in the continuous mode, press the RUN/STOP key.

8. Press the MEASURE key on the front panel and select measurement items.

For example, press the Power Codogram side key to observe the code domain power spectrogram.

9. Press the MEAS SETUP key on the front panel and set the measurement

parameters. Refer to page 2-25 for details of the Meas Setup menu.

10. Set the analysis range in the overview. Refer to the WCA230A and WCA280A

User Manual for the details.

11. Press the Analyze side key to perform measurement for the frames in the

analysis range. The measurement result and waveform are displayed in the main view.

Change the scale and format of the view as needed. Refer to page 2-28 for setting views specific to the 3GPP-R5 downlink analysis.

12. If the level of input signals is low, the waveform may not be displayed

correctly. In this case, perform the following procedure:

NOTE.

The 3GPP-R5 downlink signal analysis may not be performed correctly if the P-SCH, S-SCH, and PCPICH channels are too low to be detected. An error occurs when one of these channel levels is lower than several tenths the sum of other channel levels. In this case, set Scrambling Code Search to Off and specify the scrambling code with the Scrambling Code side key.

a. Press the MEAS SETUP key on the front panel.

b. Press the Modulation Parameters... side key.

c. Press the Scrambling Code Search side key to select Off.

d. Press the Scrambling Code side key and enter the scrambling code.

The analyzer performs the measurement with the value set here in place of detecting the scrambling code.

e. Press the MEAS SETUP key on the front panel.

f. Press the Analyze side key to perform measurement for the frames in the

analysis range.

WCA230A & WCA280A Option 27 User Manual

2-23

Downlink Analysis in the Demod Mode

Figure 2-12 shows an example of the code domain power measurement.

Figure 2-12: Example of the code domain power measurement

Change the scale and format of the view as needed. Refer to page 2-28 for setting views specific to the 3GPP-R5 uplink analysis.

2-24

WCA230A & WCA280A Option 27 User Manual

Measurement Setup Menu

The Meas Setup menu for the 3GPP-R5 downlink modulation analysis contains the following controls:

Downlink Analysis in the Demod Mode

Analyze

Modulation Parameters...

Performs measurements for time slots in the analysis range.

NOTE.

described below, press the Analyze side key to perform the measurement for the modified settings.

Sets a measurement parameter to a non-standard value. The following controls are provided:

Scrambling Code Search.

scrambling code from input signals.

 On. Detects a scrambling code automatically from the input signal to perform

 Off. Default. Performs measurement using the scrambling code that has been

NOTE.

appropriate scrambling code for reliable detection when either multiple code channels are active or the sync channels have low power.

Also refer to Note on page 2-23.

When you change settings of the parameters in the Meas Setup menu

Selects whether to perform analysis by detecting a

the measurement.

set manually with Scrambling Code described below.

The manual mode (Scrambling Code Search Off) should be used with the

Scrambling Code.

Scrambling Code Search. The analyzer performs measurement using the set scrambling code. Range: 0 to 24575 (default: 0).

The 3GPP standard defines the scrambling code with the following formulas. Input the n value to set the code.

Primary scrambling code: n = 16 * i where i = 0 to 511 Secondary scrambling code: n = 16 * i + k where k = 1 to 15

WCA230A & WCA280A Option 27 User Manual

Sets the scrambling code number when you select Off in

2-25

Downlink Analysis in the Demod Mode

Use Alternative Scramb. Code...

Selects the de-spread method to display the

measurement results:

 Not Used. Default. Uses the primary scrambling code only (without the left

and the right alternative scrambling codes) to de-spread the input signal.

 Primary. Uses the primary scrambling with the left and the right alternative

scrambling codes to de-spread the input signal.

 Left Alternative. Uses the left alternative scrambling code to de-spread the

input signal.

 Right Alternative. Uses the right alternative scrambling code to de-spread the

input signal.

Primary, Left Alternative and Right Alternative use the proprietary algorithm to enhance the sensitivity by approximately 20 to 30 dB compared to Not Used. Not Used does not use the alternative scrambling codes, providing faster measurements.

Use SCH Part.

Selects whether to include or exclude the SCH portion when

calculating the code domain power.

 On. Calculates the code domain power by including the SCH portion.

 Off. Default. Calculates the code domain power by excluding the SCH portion.

Composite.

Determines whether to perform the composite analysis (automatic

detection of symbol rate).

 On. Default. Specifies that the composite analysis is performed.

 Off. Specifies that the composite analysis is not performed.

NOTE.

You should usually specify that composite analysis is performed. If a normal analysis does not result, select Off in this command and select a specific symbol rate with Symbol Rate in the View: Define menu.

16QAM Detection.

Selects whether to detect the QPSK or 16QAM code channel

automatically.

 On. Default. Automatically detects whether the code channel is QPSK or

16QAM.

 Off. Assumes that all code channels are QPSK.

2-26

WCA230A & WCA280A Option 27 User Manual

Downlink Analysis in the Demod Mode

Auto Carrier

Measurement Filter...

 None (no filter)

 RootRaisedCosine (default)

Reference Filter...

 None (no filter)

 RaisedCosine (default)

 Gaussian

Selects a filter for demodulating digitally-modulated signals:

Selects a filter for creating reference data:

For the filters, refer to Process Flow of Digitally-Modulated Signal in the WCA230A and WCA280A User Manual.

Filter Parameter.

Sets the a/BT value for Measurement Filter and Reference Filter

described above. Range: 0.0001 to 1 (default: 0.22).

Selects whether to detect the carrier automatically.

 On. Default. Automatically detects the carrier for every frame.

The error from the center frequency is shown on the Freq Error side key.

Frequency Offset

EVM IQ Origin Offset

 Off. Sets the carrier frequency using Frequency Offset described below.

Sets the carrier frequency when Auto Carrier is selected to Off. Input the carrier offset from the center frequency.

Determines whether to include or exclude the I/Q origin offset in the EVM, Rho, and PCDE calculation.

 Include. Default. Includes the I/Q origin offset in the EVM, Rho, and PCDE

calculation.

 Exclude. Excludes the I/Q origin offset from the calculation.

WCA230A & WCA280A Option 27 User Manual

2-27

Downlink Analysis in the Demod Mode

Scale and Format of View

The following main views are specific for the measurement items of the 3GPP-R5 downlink analysis in Demod mode:

 Code domain power

 Power codogram

 Code power versus Time slot

 Code power versus Symbol

 Symbol constellation

 Symbol EVM

 Symbol eye diagram

 Symbol table

 Modulation accuracy

Each view (and its specific menu) is described on the following pages. In the main view, the time slot table shown in Figure 2-13 is displayed in addition to waveform and measurement results.

Time slot number in the analysis range

(0 is the last)

Figure 2-13: Time slot table

Time slot number in the radio frame

SSCH (Secondary Synchronization Channel)

SCG (Scrambling Code Group)

Scrambling code number

2-28

WCA230A & WCA280A Option 27 User Manual

Downlink Analysis in the Demod Mode

View: Define Menu

The View: Define menu is common to all main views of the 3GPP-R5 downlink measurement items. It contains the following controls:

Show Views.

 Single. Displays only the view selected by the VIEW: SELECT key.

 Multi. Default. Displays the overview, subview, and main view.

Overview Content...

 Waveform (power versus time)

 Spectrogram

Subview Content...

 Spectrum

 Code Domain Power

 Power Codogram

 CDP vs Time Slot (code domain power versus time slot)

 CDP vs Symbol (code domain power versus symbol)

Selects the view style:

Selects a view to display in the overview:

Selects a view to display in the subview:

 Symbol Constellation

 Symbol EVM

 Symbol Eye Diagram

 Symbol Table

 Modulation Accuracy

Time Slot.

Sets a time slot number to position the marker.

Range: 0 to the number of slots −1

Channelization Code.

Sets a channelization code number to position the marker.

Range: 0 to 511 channels

Multi Slot.

Selects whether to display single slot or multiple slots in the main view. This selection affects only the code domain power versus symbol view and the symbol EVM view. In the other views, it has no effect.

 Off. Displays one time-slot selected by the Time Slot side key.

 On. Displays up to 15 time-slots in the main view.

WCA230A & WCA280A Option 27 User Manual

2-29

Downlink Analysis in the Demod Mode

Menu Off.

Removes the side menu from the screen to expand the waveform and measurement result area. Press the MENU side key when you return to the original display.

Show SCH Part.

 Off. Hides the SCH part.

 On. Displays the SCH part.

Symbol Rate...

 960 k

 480 k

 240 k

 120 k

 60 k

 30 k

 15 k

 7.5 k

Determines whether to display SCH at the beginning of data.

Sets the symbol rate for displaying symbol constellation:

 Composite

The default is Composite for multi-rate.

2-30

WCA230A & WCA280A Option 27 User Manual

Code Domain Power

Downlink Analysis in the Demod Mode

When you select Code Domain Power in the Measure menu, the code domain power is displayed for each channelization code, as shown in Figure 2-14.

Channelization code number (Channel number at the symbol rate, modulation type)

Marker readout

Vertical Scale

Ver t i cal S t a r t

Code domain power

Time slot number in the radio frame

Horizontal Scale

Horizontal Start

Figure 2-14: Code domain power

WCA230A & WCA280A Option 27 User Manual

2-31

Downlink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

Auto Scale.

Sets the start value and the scale of the vertical axis automatically

to fit the waveform to the screen.

Horizontal Scale.

Sets the scale of the horizontal axis.

Range: 16 to 512 channels.

Horizontal Start.

Sets the start channel number of the horizontal axis.

Range: 0 to [512 −(Horizontal Scale)].

Vertical Scale.

Sets the scale of the vertical axis.

Range: 50 µ to 50 dB.

Vertical Stop.

Sets the maximum value (top edge) of the vertical axis.

Range: −50 to Vertical Scale [dB].

Full Scale.

Y Axis.

Sets the scale of the vertical axis to the default full scale value.

Selects whether to represent the vertical axis (amplitude) with relative or

absolute values.

 Relative. The vertical axis represents power relative to the total power of

all channels.

 Absolute. The vertical axis represents absolute power of each channel

2-32

WCA230A & WCA280A Option 27 User Manual

Power Codogram

Downlink Analysis in the Demod Mode

When you select Power Codogram in the Measure menu, the code domain power is displayed in spectrogram, as shown in Figure 2-15.

Channelization code number (Channel number at the symbol rate, modulation type)

Ver tical S i ze

Vertical Start

Marker readout

Color Stop

Code domain power

Slot number in the radio frame

Slot number based on the end of analysis range (0)

Relative time from completion of data acquisition

Color Scale

Horizontal Scale

Horizontal Start

Figure 2-15: Power codogram

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Downlink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

Auto Scale.

Sets the start value and the scale of the vertical axis automatically

to fit the waveform to the screen.

Horizontal Scale.

Sets the scale of the horizontal axis.

Range: 16 to 512 channels.

Horizontal Start.

Sets the start channel number of the horizontal axis.

Range: 0 to [512 − (Horizontal Scale)].

Vertical Size.

Sets the full scale of the vertical axis in frames.

Range: 58 to 59392.

Vertical Start.

Color Scale.

Sets the start frame number of the vertical axis.

Sets the scale of the color axis (the value obtained by subtracting the

minimum value from the maximum power).

 5 dB

 10 dB

 20 dB

 50 dB

The spectrogram is displayed in 100 steps (100 colors) from the minimum value (blue) to the maximum value (red) in the default state.

Color Stop.

Sets the maximum value (top edge) of the color axis.

Range: −50 to Color Scale [dB].

Full Scale.

Y Axis.

Sets Color Stop to 0 (zero) and Color Scale to 50 dB.

Selects whether to represent the Y (color) axis with relative or

absolute values.

 Relative. The Y axis represents power relative to the total power of

all channels.

 Absolute. The Y axis represents absolute power of each channel.

2-34

WCA230A & WCA280A Option 27 User Manual

Code Power versus Time Slot

When you select Code Power versus Time Slot in the Measure menu, the code domain power is displayed for each slot, as shown in Figure 2-16.

lot number in the analysis range (Slot number in the radio frame)

Downlink Analysis in the Demod Mode

Marker readout

Vertical Scale

Ver t i cal S t a r t

Slot power

Horizontal Scale

Horizontal Start

Figure 2-16: Code domain power versus Time slot

WCA230A & WCA280A Option 27 User Manual

2-35

Downlink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

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 slots).

Range: N/8 to N slots (N: the number of slots in the analysis range.)

Horizontal Start.

Sets the start slot number of the horizontal axis.

Range: −(N − 1) to [1 − (Horizontal Scale)].

Vertical Scale.

Sets the scale of the vertical axis.

Range: 50 µ to 50 dB.

Vertical Stop.

Sets the maximum value (top edge) of the vertical axis.

Range: − 25 to [(Vertical Scale) + 25] dB.

Full Scale.

Y Axis.

Sets the scale of the vertical axis to the default full scale value.

Selects whether to represent the vertical (amplitude) axis with relative or

absolute values.

 Relative. The vertical axis represents time slot power relative to the power of

the first time slot in the analysis range.

 Absolute. The vertical axis represents absolute power of time slots.

Select Power.

 Code. Shows the power of all channels or the specified channel depending on

Selects the channel to show the power for each time slot.

the setting of Total Power described below.

 PSCH. Shows the power of the PSCH (Primary Synchronization Channel).

 SSCH. Shows the power of the SSCH (Secondary Synchronization Channel).

Tot al Powe r.

Determines whether to display the total power for each time slot when

you select Code with Select Power described above.

 On. Default. Displays the total power of all channels for each time slot.

 Off. Displays power of the channel specified with Channelization Code in the

View: Define menu (refer to page 2-29).

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WCA230A & WCA280A Option 27 User Manual

Code Power versus Symbol

When you select Code Power versus Symbol in the Measure menu, the code domain power is displayed for each symbol, as shown in Figure 2-17.

Downlink Analysis in the Demod Mode

Marker readout

Vertical Scale

Vertical Start

Symbol number

Horizontal Start

Channelization code number

Symbol power (Channel number at the symbol rate, modulation type)

Channel number (Symbol rate)

Time slot number in the radio frame

Horizontal Scale

Figure 2-17: Code domain power versus Symbol

WCA230A & WCA280A Option 27 User Manual

2-37

Downlink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

Auto Scale.

Sets the start value and the scale of the vertical axis automatically

to fit the waveform to the screen.

Horizontal Scale.

Sets the scale of the horizontal axis (number of symbols).

Range: 0 to 320 symbols.

Horizontal Start.

Sets the start symbol number of the horizontal axis.

Range: 0 to [(initial value of Horizontal Scale) − (set value of Horizontal Scale)].

Vertical Scale.

Sets the scale of the vertical axis.

Range: 50 µ to 50 dB.

Vertical Stop.

Sets the maximum value (top edge) of the vertical axis.

Range: −50 to Vertical Scale [dB].

Full Scale.

Y Axis.

Sets the scale of the vertical axis to the default full-scale value.

Selects whether to represent the vertical (amplitude) axis with relative or

absolute values.

 Relative. The vertical axis represents power relative to the total power of

all channels.

 Absolute. The vertical axis represents absolute power of each channel.

2-38

WCA230A & WCA280A Option 27 User Manual

Symbol Constellation

Downlink Analysis in the Demod Mode

The symbol constellation is displayed when you select Symbol Constellation in the Measure menu, as shown in Figure 2-18.

Origin offset measurement value

Scale of amplitude

View: Scale Menu

Symbol number

Marker readout

Real channel number (Symbol rate)

Time slot number in the radio frame

Figure 2-18: Symbol constellation

Use the following controls to set the scale:

Measurement Content...

Selects vector or constellation display.

Channelization code number

 Vec tor. Selects vector display. A signal represented by phase and amplitude is

displayed in polar coordinate or IQ diagram. The red point indicates the symbol position of 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 the symbol positions of an ideal signal.

You can select degree or radian for the angular unit by pressing SYSTEM → Instrument Setup... → Angular Units...

WCA230A & WCA280A Option 27 User Manual

2-39

Downlink Analysis in the Demod Mode

Symbol EVM

When you select Symbol EVM in the Measure menu, EVM (Error Vector Magnitude) is displayed for each symbol, as shown in Figure 2-19.

EVM

Magnitude error

Phase error

Waveform quality (ρ)

Analysis length

(number of symbols)

Marker readout

Channelization code numberSymbol number

Measurement Content = EVM

Channel number (Symbol rate)

Time slot number in the radio frame

Horizontal Scale

Horizontal Start

Vertical Scale

Vertical Start

Vertical Offset

Figure 2-19: Symbol EVM

Measurement Content = Mag Error or Phase Error

Vertical Scale

Horizontal Scale

Horizontal Start

2-40

WCA230A & WCA280A Option 27 User Manual

Downlink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

Auto Scale.

Sets the start value and the scale of the vertical axis automatically

to fit the waveform to the screen.

Horizontal Scale.

Sets the scale of the horizontal axis (number of symbols).

Range: 0 to 320 symbols.

Horizontal Start.

Sets the start symbol number of the horizontal axis.

Range: 0 to [(initial value of Horizontal Scale) − (set value of Horizontal Scale)].

Vertical Scale.

Sets the scale of the vertical axis.

Refer to Table 2-3 for the setting range.

Vertical Start.

Sets the minimum value (bottom edge) of the vertical axis when the

measurement content is EVM. Refer to Table 2-3 for the setting range.

Vertical Offset.

Sets the center value ((maximum + minimum) / 2) of the vertical axis when the measurement content is Mag Error or Phase Error. Refer to Table 2-3 for the setting range.

Full Scale.

Sets the scale of vertical axis to the default full-scale value.

Measurement Content...

 EVM. Represents the vertical axis with EVM.

 Mag Error. Represents the vertical axis with magnitude error.

 Phase Error. Represents the vertical axis with phase error.

Selects how to display the vertical axis:

Table 2-3: Vertical scale setting range

Measurement Content... Vertical Scale Vertical Start Vertical Offset

EVM 100 Mag Error 200 Phase Error 450

to 100%

to 200% -

to 450

−

100 to 100% -

−

200 to 200%

−

450 to 450

You can select degree or radian for the angular unit by pressing SYSTEM → Instrument Setup... → Angular Units...

WCA230A & WCA280A Option 27 User Manual

2-41

Downlink Analysis in the Demod Mode

Symbol Eye Diagram

The symbol eye diagram is displayed when you select Symbol Eye Diagram in the Measure menu, as shown in Figure 2-20.

Channelization code numberSymbol number

Marker readout

View: Scale Menu

Amplitude (Channel number at the symbol rate, Modulation type)

Channel number (Symbol rate)

Time slot number in the radio frame

Figure 2-20: Symbol eye diagram

Use the following controls to scale the view.

Measurement Content...

 I. Default. Displays I data on the vertical axis.

 Q. Displays Q data on the vertical axis.

 Tre llis . Displays phase on the vertical axis.

Selects the vertical axis of eye diagram.

2-42

Eye Length.

Enters the number of display symbols on the horizontal axis.

Range: 1 to 16 (default: 2)

WCA230A & WCA280A Option 27 User Manual

Symbol Table

Downlink Analysis in the Demod Mode

The symbol table is displayed when you select Symbol Table in the Measure menu, as shown in Figure 2-21.

Marker readout

View: Scale Menu

Symbol number

Channelization code number

Symbol value (Channel number at the symbol rate, modulation type)

Figure 2-21: Symbol table

Use the following controls to scale the view:

Radix.

Selects the radix for displaying the table:

 Hex. Hexadecimal digit

 Oct. Octal digit

 Bin. Default. Binary digit

Hex and Oct indicate values of binary data string in units of modulation symbol.

Rotate.

Sets the start position. Range: 0 to 3.

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2-43

Downlink Analysis in the Demod Mode

Modulation Accuracy

The constellation of all channels before the de-spread is displayed when you select Modulation Accuracy in the Measure menu.

When you press the VIEW: SELECT key on the front panel to select the constellation view, the measurement results for the time slot are displayed instead of the overview, as shown in Figure 2-22.

Measurement results

■

EVM (RMS and peak)

■

Magnitude error (RMS and peak)

■

Phase error (RMS and peak) These values are displayed when you select the constellation view.

Time at the marker position (relative to the end of data acquisition)

Marker readout

Measurement results

■

PCDE (Peak Code Domain Error)

@ channel

■

EVM (RMS)

■

Phase error (RMS)

■

Waveform quality (ρ)

■

Frequency error

■

Origin offset (IQ feedthrough)

Constellation view

Time slot number in the radio frame

Figure 2-22: Modulation accuracy

The view settings are the same as for Symbol Constellation. Refer to Symbol Constellation on page 2-39.

2-44

WCA230A & WCA280A Option 27 User Manual

Uplink Analysis in the Demod Mode

This section describes the basic operation for the 3GPP-R5 uplink analysis in the Demod (modulation analysis) mode. You can access the measurement item by pressing DEMOD →Standard... → 3GPP-R5-UL as shown in Figure 2-23.

MODE

S/A

DEMOD

TIME

Figure 2-23: Uplink analysis measurement menu in the Demod mode

Standard... 3GPP-R5-UL

Measure menu items

Code Domain Power Power Codogram Code Power versus Time Slot Code Power versus Symbol Symbol Constellation Symbol EVM Symbol Eye Diagram Symbol Table Modulation Accuracy ACK/NACK Analysis

The 3GPP-R5 uplink modulation analysis is based on the standard digital modulation analysis function. For the digital modulation analysis, refer to the WCA230A and WCA280A User Manual.

WCA230A & WCA280A Option 27 User Manual

2-45

Uplink Analysis in the Demod Mode

Measurement Procedure

The following procedure shows you how to acquire data of multiple slots in advance, measure continuous data, and obtain continuous code domain power:

NOTE.

For details on setting frequency, span, and amplitude, refer to the

WCA230A and WCA280A User Manual.

1. Press the DEMOD key on the front panel.

2. Press the side key Standard... →3GPP-R5-UL.

3. Press the FREQUENCY/CHANNEL key on the front panel to set frequency.

If you use the channel table, do these steps:

 Press the Channel Table... side key and select W-CDMA-UL.

 Press the Channel side key and select a channel by rotating the general

purpose knob.

The center frequency is set to the value corresponding to the channel.

4. Press the SPAN key on the front panel to set the span.

5. Press the AMPLITUDE key on the front panel to set the amplitude

appropriately.

NOTE.

If the input level is too high, A/D OVERFLOW displays in the red box at the

center top of the screen. If this occurs, raise the reference level.

6. Press the TIMING key on the front panel and then the Acquisition Length side key to set the time length to acquire one block.

2-46

Suppose that one block contains M frames; the acquisition length is calculated with this equation:

(One block acquisition length) = M × (One frame acquisition length)

One frame acquisition length is determined by span and indicated on the Spectrum Length side key.

The number of frames M required for measuring N slots must meet the following condition:

M > K × (N + 1.2) + 1

where K =16.7 (for span 20 MHz and 15 MHz)

8.34 (for span 10 MHz)

4.17 (for span 5 MHz)

WCA230A & WCA280A Option 27 User Manual

Uplink Analysis in the Demod Mode

7. After acquiring measurement data, stop the acquisition.

If you are acquiring data in the continuous mode, press the RUN/STOP key.

8. Press the MEASURE key on the front panel and select measurement items.

For example, press the Power Codogram side key to observe the code domain power spectrogram.

9. Press the MEAS SETUP key on the front panel and set the measurement

parameters. Refer to page 2-48 for details of the Meas Setup menu.

10. Set the analysis range in the overview using the Timing menu.

Refer to the WCA230A and WCA280A User Manual for the details.

11. Press the Analyze side key to perform measurement for the frames in the

analysis range. The measurement result and waveform are displayed in the main view.

Figure 2-24 shows an example of the code domain power measurement.

Figure 2-24: Example of the code domain power measurement

Change the scale and format of the view as needed. Refer to page 2-54 for setting views specific to the 3GPP-R5 uplink analysis.

WCA230A & WCA280A Option 27 User Manual

2-47

Uplink Analysis in the Demod Mode

Measurement Setup Menu

The Meas Setup menu for the uplink analysis contains the following controls:

Analyze

Modulation Parameters...

Performs measurements for time slots in the analysis range.

NOTE.

When you change settings in the Meas Setup menu, press the Analyze

side key to perform the measurement for the modified settings.

Sets a measurement parameter to a non-standard value. The following setting items are provided:

Measurement Mode...

Selects the type of uplink signal.

(Not available for the ACK/NACK analysis.)

 DPDCH/DPCCH (default)

 PRACH

 PCPCH

Scrambling Code Type.

Available for the DPDCH/DPCCH measurement mode.

Selects the scrambling code type:

 Long (default)

 Short

2-48

Scrambling Code.

Sets the scrambling code number.

Range: 0 to 16777215 (default: 0).

Threshold.

Available for the PRACH measurement mode.

Sets the threshold level to detect a burst. Range: −100 to 10 dB relative to the reference level (default: −30 dB).

Measurement Filter...

 None (no filter)

 RootRaisedCosine (default)

Reference Filter...

 None (no filter)

 RaisedCosine (default

 Gaussian

Selects a filter for demodulating digitally-modulated signals:

Selects a filter for creating reference data:

WCA230A & WCA280A Option 27 User Manual

Uplink Analysis in the Demod Mode

For the filters, refer to Process Flow of Digitally-Modulated Signal in the WCA230A and WCA280A User Manual.

Auto Carrier

Frequency Offset

EVM IQ Origin Offset

Filter Parameter.

Sets an α/BT value for Measurement Filter and Reference Filter

described above. Range: 0.0001 to 1 (default: 0.22)

Selects whether to detect the carrier automatically.

 On. Default. Automatically detects the carrier for every frame.

The error from the center frequency is shown on the Freq Error side key.

 Off. Sets the carrier frequency using Frequency Offset.

Sets the carrier frequency when Off is selected in Auto Carrier. Input the carrier offset from the center frequency.

Determines whether or not to take into account the I/Q origin offset for the EVM, Rho and PCDE measurement results.

 Include. Default. Takes into account the I/Q origin offset for the results.

 Exclude. Ignores the I/Q origin offset for the results.

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Uplink Analysis in the Demod Mode

Subframe Offset Select

Subframe to TS Offset

Downlink Time Offset

ACK/NACK Analysis Measurement Menu.

The following controls are only for

ACK/NACK analysis.

Selects how to specify the subframe offset.

 Auto. Default. The symbol table is displayed for any offset.

 STO. Sets the Subframe to Time-Slot Offset (STO) using the

Subframe to TS Offset side key.

 DTO. Sets the Downlink Time Offset (DTO) using the Downlink Time Offset

side key.

Specifies the subframe to time-slot offset when you select STO with the Subframe Offset Select side key. Range: 0 to 9 symbols (default: 0).

The subframe to time-slot offset is the time offset between the start of the DPDCH time slot and the start of the HS-DPCCH subframe (see Figure 2-25).

Specifies the downlink time offset when you select DTO with the Subframe Offset Select side key. Range: 0 to 149 symbols (default: 1).

The downlink time offset is the time offset between the start of HS-SCCH and the start of DPCH (see Figure 2-25).

Downlink Unit: Symbols

HS-SCCH

HS-PDSCH

DPCH

30 30

Downlink time offset

(DTO)

Uplink

HS-DPCCH

DPDCH

30 30

10 10 10 10 10 10 10 10 10 10

Subframe to time-slot offset

(STO)

10 10 10 10 10 10 10 10 10 10

Displayed on the symbol table

• • •

Figure 2-25: Subframe offset

Update ACK/NACK Results

Re-detects ACK and NACK indications on the existing time slot data to update the measurement result display after you change the subframe offset manually or abort the Analyze (top side key) operation.

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WCA230A & WCA280A Option 27 User Manual

Display Method for HS-DPCCH

The measurement results for each channel are normally displayed in the view for each time slot. But HS-DPCCH has the different display methods for the settings of Subframe Offset Select in the Meas Setup menu. This section describes how to display HS-DPCCH in each view.

Code Domain Power

 When Subframe Offset Select is set to AUTO

Each time slot is displayed without offset as the other channels (see the upper part of Figure 2-26).

 When Subframe Offset Select is set to STO (Subframe to Time slot Offset)

Each time slot is displayed with offset specified by Subframe to TS Offset in the Meas Setup menu. Also in the total power calculation for the relative value display, only HS-DPCCH is offset in the same way. But the last time slot is displayed without offset (see the lower part of Figure 2-26).

 When Subframe Offset Select is set to DTO (Downlink Time Offset)

Each time slot is displayed in the same manner as when Subframe Offset Select is set to STO. But the number of offset symbols is determined by this formula: [151 − (Downlink Time Offset)] mod 10 (see the lower part of Figure 2-26).

Uplink Analysis in the Demod Mode

Subframe Offset Select = AUTO

DPDCH 10

HS-DPCCH

Display sequence

Subframe Offset Select = STO or DTO

DPDCH 10

HS-DPCCH

Display sequence

1 234

10 10 10

1 23

NOTE. “10” in the box represents the number of symbols in a time slot.

<10

Figure 2-26: HS-DPCCH display method (Code domain power)

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Uplink Analysis in the Demod Mode

Code Power versus Symbol

 When Subframe Offset Select is set to AUTO

 When Subframe Offset Select is set to STO (Subframe to Time slot Offset)

 When Subframe Offset Select is set to DTO (Downlink Time Offset)

10 symbols are displayed for each time slot without offset as the other channels (see the upper part of Figure 2-26 on page 2-51).

30 symbols are displayed for each time slot with offset specified by Subframe to TS Offset in the Meas Setup menu. Also in the total power calculation for the relative value display in the Code power versus Symbol view, only HS-DPCCH is offset in the same way (see the upper part of Figure 2-27). But when there are not enough symbols in the last part of the analysis range, 30, 20, and 10 symbols are displayed without offset as shown in the upper part of Figure 2-27, the display sequence 8, 9, and 10, respectively.

If the specified time slot is the first one in the subframe, symbols are displayed in the same manner as when Subframe Offset Select is set to STO. Otherwise symbols are displayed in the same manner as when Subframe Offset Select is set to AUTO (see the lower part of Figure 2-26).

Subframe Offset Select = STO

DPDCH 10

HS-DPCCH

Display sequence

Subframe Offset Select = DTO

DPDCH 10

HS-DPCCH

Display sequence

10 10 10

10 10 10 10 10 10 10 10 <10

10 10 10

10 10 10 10 10 10 10 10 <10

2 3 5 6 8 910

10 10 10 10 10 10

4 7

10 10 10 10 10 10

4 7

NOTE. “10” in the box represents the number of symbols in a time slot.

Figure 2-27: HS-DPCCH display method (Code power versus Symbol)

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Uplink Analysis in the Demod Mode

ACK/NACK Analysis

Symbols of four time slots (40 symbols) are displayed without offset (see the upper part of Figure 2-28). But for the last three time slots, 30, 20, and 10 symbols are displayed without offset as shown in the Figure 2-28, the display sequence 4, 5, and 6, respectively.

DPDCH 10

HS-DPCCH

Display sequence

10 10 10

10 10 10 10 <10

NOTE. “10” in the box represents the number of symbols in a time slot.

10 10

Figure 2-28: HS-DPCCH display method (ACK/NACK analysis)

Power Codogram, Code Power versus Time Slot, Symbol Constellation, Symbol EVM, Symbol Eye Diagram, and Symbol Table

Each time slot is displayed regardless HS-DPCCH.

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Uplink Analysis in the Demod Mode

Scale and Format of View

The following main views are specific for the measurement items of the 3GPP-R5 downlink analysis in Demod mode:

 Code domain power

 Power codogram

 Code power versus Time slot

 Code power versus Symbol

 Symbol constellation

 Symbol EVM

 Symbol eye diagram

 Symbol table

 Modulation accuracy

 ACK/NACK analysis

Each view (and its specific menu) is described on the following pages. In the main view, the time slot table shown in Figure 2-29 is displayed in addition to waveform and measurement results. Only the ACK/NACK analysis has its own time slot table, which is shown in Figure 2-39 on page 2-71.

Time slot number in the analysis range

(0 is the last)

Figure 2-29: Time slot table

Time slot number in the radio frame

Signature number in preamble

Preamble

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Uplink Analysis in the Demod Mode

View: Define Menu

The View: Define menu is common to all main views of the 3GPP-R5 downlink measurement items. It contains the following controls:

Show Views.

 Single. Displays only the view selected by the VIEW: SELECT key.

 Multi. Default. Displays the overview, subview, and main view.

Overview Content...

 Waveform (power versus time)

 Spectrogram

Subview Content...

 Spectrum

 Code Domain Power

 Power Codogram

 CDP vs Time Slot (code domain power versus time slot)

 CDP vs Symbol (code domain power versus symbol)

Selects the view style:

Selects a view to display in the overview:

Selects a view to display in the subview:

 Symbol Constellation

 Symbol EVM

 Symbol Eye Diagram

 Symbol Table

 Modulation Accuracy

Time Slot.

Sets a time slot number to position the marker.

Range: 0 to the number of slots −1

Symbol Rate...

 960 k

 480 k

 240 k

 120 k

 60 k

 30 k

 15 k

Sets the symbol rate for displaying symbol constellation:

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Uplink Analysis in the Demod Mode

Channel Number.

Range: Channel 0 to 7.

Menu Off.

measurement result area. Press the MENU side key when you return to the original display.

Change scale and format of the view as needed. For the details, refer to the

WCA230A and WCA280A User Manual and the WCA230A and WCA280A Option 23 User Manual.

Removes the side menu from the screen to expand the waveform and

Sets a channel number to position the marker.

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Code Domain Power

Uplink Analysis in the Demod Mode

When you select Code Domain Power in the Measure menu, the code domain power is displayed for each channel, as shown in Figure 2-30.

Channel number (Time slot number in the radio frame)

Marker readout

Vertical Scale

Ver t i cal S t a r t

Code domain power

Horizontal Scale

Horizontal Start

Figure 2-30: Code domain power

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Uplink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

Auto Scale.

Sets the start value and the scale of the vertical axis automatically to fit

the waveform to the screen.

Horizontal Scale.

Sets the scale of the horizontal axis.

Range: 1 to 8 channels.

Horizontal Start.

Sets the start channel number of the horizontal axis.

Range: 0 to [8 − (Horizontal Scale)].

Vertical Scale.

Sets the scale of the vertical axis.

Range: 50 µ to 50 dB.

Vertical Stop.

Sets the maximum value (top edge) of the vertical axis.

Range: −50 to Vertical Scale [dB].

Full Scale.

Y Axis.

Sets the scale of the vertical axis to the default full-scale value.

Selects whether to represent the vertical axis (amplitude) with relative or

absolute values.

 Relative. The vertical axis represents power relative to the total power of

all channels.

 Absolute. The vertical axis represents absolute power of each channel

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Power Codogram

Uplink Analysis in the Demod Mode

When you select Power Codogram in the Measure menu, the code domain power is displayed in spectrogram, as shown in Figure 2-31.

Channel number

Ver tical S i ze

Vertical Start

Marker readout

Color Stop

Code domain power

TS: Slot number in the radio frame SIG: Signature number in preamble

Slot number based on the end of analysis range (0)

Relative time from completion of data acquisition

Color Scale

Horizontal Scale

Horizontal Start

Figure 2-31: Power codogram

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Uplink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

Auto Scale.

Sets the start value and the scale of the vertical axis automatically to fit

the waveform to the screen.

Horizontal Scale.

Sets the scale of the horizontal axis.

Range: 1 to 8 channels.

Horizontal Start.

Sets the start channel number of the horizontal axis.

Range: 0 to [8 − (Horizontal Scale)].

Vertical Size.

Sets the full scale of the vertical axis in frames.

Range: 58 to 59392 frames.

Vertical Start.

Color Scale.

Sets the start frame number of the vertical axis.

Sets the scale (the value subtracting the minimum power value from

the maximum) of the color axis:

 5 dB

 10 dB

 20 dB

 50 dB

The spectrogram is displayed in 100 steps (100 colors) from the minimum value (blue) to the maximum value (red) in the default state.

Color Stop.

Sets the maximum value (top edge) of the color axis.

Range: −50 to Color Scale [dB].

Full Scale.

Y Axis.

Sets Color Stop to 0 (zero) and Color Scale to 50 dB.

Selects whether to represent the Y (color) axis with relative or

absolute values.

 Relative. The Y axis represents power relative to the total power of

all channels.

 Absolute. The Y axis represents absolute power of each channel.

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Code Power versus Time Slot

When you select Code Power versus Time Slot in the Measure menu, the code domain power is displayed for each slot, as shown in Figure 2-32.

Slot number in the analysis range (Slot number in the radio frame)

Marker readout

Vertical Scale

Uplink Analysis in the Demod Mode

Slot power

Ver t i cal S t a r t

Horizontal Scale

Horizontal Start

Figure 2-32: Code domain power versus Time slot

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Uplink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

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 slots).

Range: N/8 to N slots (N: the number of slots in the analysis range.)

Horizontal Start.

Sets the start slot number of the horizontal axis.

Range: −(N − 1) to [1 − (Horizontal Scale)].

Vertical Scale.

Sets the scale of the vertical axis.

Range: 50 µ to 50 dB.

Vertical Stop.

Sets the maximum value (top edge) of the vertical axis.

Range: − 25 to [(Vertical Scale) + 25] dB.

Full Scale.

Y Axis.

Sets the scale of the vertical axis to the default full scale value.

Selects whether to represent the vertical (amplitude) axis with relative or

absolute values.

 Relative. The vertical axis represents time slot power relative to the power of

the first time slot in the analysis range.

 Absolute. The vertical axis represents absolute power of time slots.

Select Power.

 Code. Shows the power of all channels or the specified channel, depending on

Selects the channel to show the power for each time slot.

the setting of Total Power described below.

 PSCH. Shows the power of the P-SCH (Primary Synchronization Channel).

 SSCH. Shows the power of the S-SCH (Secondary Synchronization Channel).

Tot al Powe r.

Determines whether to display the total power for each time slot when

you select Code with Select Power described above.

 On. Default. Displays the total power of all channels for each time slot.

 Off. Displays power of the channel specified with Channel Number in the

View: Define menu (refer to page 2-56).

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Code Power versus Symbol

When you select Code Power versus Symbol in the Measure menu, the code domain power is displayed for each symbol, as shown in Figure 2-33.

Uplink Analysis in the Demod Mode

Marker readout

Vertical Scale

Vertical Start

Symbol number

Horizontal Start

Channel number (Slot number in the radio frame)

Symbol power

Channel number

Slot number in the radio frame

Horizontal Scale

Figure 2-33: Code domain power versus Symbol

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Uplink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

Auto Scale.

Sets the start value and the scale of the vertical axis automatically to fit

the waveform to the screen.

Horizontal Scale.

Sets the scale of the horizontal axis (number of symbols).

Range: 0 to 640 symbols.

Horizontal Start.

Sets the start symbol number of the horizontal axis.

Range: 0 to [(initial value of Horizontal Scale) − (set value of Horizontal Scale)].

Vertical Scale.

Sets the scale of the vertical axis.

Range: 50 µ to 50 dB.

Vertical Stop.

Sets the maximum value (top edge) of the vertical axis.

Range: −50 to Vertical Scale [dB].

Full Scale.

Y Axis.

Sets the scale of the vertical axis to the default full-scale value.

Selects whether to represent the vertical (amplitude) axis with relative or

absolute values.

 Relative. The vertical axis represents power relative to the total power of

all channels.

 Absolute. The vertical axis represents absolute power of each channel.

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Symbol Constellation

Uplink Analysis in the Demod Mode

The symbol constellation is displayed when you select Symbol Constellation in the Measure menu, as shown in Figure 2-34.

Origin offset measurement value

Scale of amplitude

View: Scale Menu

Symbol number

Marker readout

Channel number

Slot number in the radio frame

Figure 2-34: Symbol constellation

Use the following controls to set the scale:

Measurement Content...

 Vec tor. Selects vector display. A signal represented with phase and amplitude

Selects vector or constellation display.

is displayed in polar coordinate or IQ diagram. The red point indicates the symbol position of 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 the symbol positions of an ideal signal.

You can select degree or radian for the angular unit by pressing SYSTEM → Instrument Setup... → Angular Units...

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Uplink Analysis in the Demod Mode

Symbol EVM

When you select Symbol EVM in the Measure menu, EVM (Error Vector Magnitude) is displayed for each symbol, as shown in Figure 2-35.

Channel numberSymbol number

Measurement results

■

EVM RMS

■

Magnitude error RMS

■

Phase error RMS

■

Waveform quality (ρ)

■

Analysis length (number of symbols)

Peak @ symbol

Marker readout

Vertical Offset

in the radio frame

Horizontal Start

Measurement Content = Mag Error or Phase Error

Measurement Content = EVM

Channel number

Slot number

Vertical Scale

Vertical Start

Horizontal Scale

Vertical Scale

2-66

Horizontal Scale

Horizontal Start

Figure 2-35: Symbol EVM

NOTE.

The uplink signals are BPSK modulated and all channels are mapped on either I or Q axis, so the Symbol EVM view does not show the phase error measurement result. Also, when you set the Measurement Content (refer to page 2-67) to Phase Error, the measurement waveform is not displayed.

WCA230A & WCA280A Option 27 User Manual

Uplink Analysis in the Demod Mode

View: Scale Menu

Use the following controls to scale the view:

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 symbols).

Range: 0 to 640 symbols.

Horizontal Start.

Sets the start symbol number of the horizontal axis.

Range: 0 to [(initial value of Horizontal Scale) − (set value of Horizontal Scale)].

Vertical Scale.

Vertical Start.

Sets the scale of the vertical axis.

Sets the minimum value (bottom edge) of the vertical axis when the

measurement content is EVM. Refer to Table 2-4 for the setting range.

Vertical Offset.

Sets the center value ((maximum + minimum) / 2) of the vertical axis when the measurement content is Mag Error or Phase Error. Refer to Table 2-4 for the setting range.

Full Scale.

Measurement Content...

Sets the scale of vertical axis to the default full-scale value.

Selects how to display the vertical axis:

 EVM. Represents the vertical axis with EVM (Error Vector Magnitude).

 Mag Error. Represents the vertical axis with magnitude error.

 Phase Error. Represents the vertical axis with phase error.

Table 2-4: Vertical scale setting range

Measurement Content... Vertical Scale Vertical Start Vertical Offset

EVM 100 Mag Error 200 Phase Error 450

to 100%

to 200% -

to 450

−

100 to 100% -

−

200 to 200%

−

450 to 450

You can select degree or radian for the angular unit by pressing SYSTEM → Instrument Setup... → Angular Units...

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Uplink Analysis in the Demod Mode

Symbol Eye Diagram

The symbol eye diagram is displayed when you select Symbol Eye Diagram in the Measure menu, as shown in Figure 2-36.

Marker readout

Figure 2-36: Symbol eye diagram

Channel numberSymbol number

Slot number in the radio frame

View: Scale Menu

Use the following controls to scale the view:

Measurement Content...

 I. Default. Displays I data on the vertical axis.

 Q. Displays Q data on the vertical axis.

 Tre llis . Displays phase on the vertical axis.

Eye Length.

Enters the number of display symbols on the horizontal axis.

Selects the vertical axis of eye diagram.

Range: 1 to 16 (default: 2)

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Symbol Table

Marker readout

Uplink Analysis in the Demod Mode

The symbol table is displayed when you select Symbol Table in the Measure menu, as shown in Figure 2-37.

Symbol number

Figure 2-37: Symbol table

View: Scale Menu

Use the following controls to scale the view:

Radix.

Selects the radix for displaying the table:

 Hex. Hexadecimal digit

 Oct. Octal digit

 Bin. Default. Binary digit

Hex and Oct indicate values of binary data string in units of modulation symbol.

NOTE.

The BPSK modulation signal contains one-bit data in a symbol, so the

symbol table has the same values for all the radices.

Rotate.

Sets the start position. Range: 0 to 3.

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Uplink Analysis in the Demod Mode

Modulation Accuracy

The constellation of all channels before the de-spread is displayed when you select Modulation Accuracy in the Measure menu.

When you press the VIEW: SELECT key on the front panel to select the constellation view, the measurement results for the time slot are displayed instead of the overview, as shown in Figure 2-38.

Measurement results

■

PCDE (Peak Code Domain Error) @ channel

■

EVM (RMS and peak)

■

Magnitude error (RMS and peak)

■

Phase error (RMS and peak)

■

Waveform quality (ρ)

■

Frequency error

■

Origin offset (IQ feedthrough)

Marker readout

Time at the marker position (relative to the end of data acquisition)

Slot number in the radio frame

Constellation view

Figure 2-38: Modulation accuracy

The view settings are the same as for Symbol Constellation. Refer to Symbol Constellation on page 2-65.

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ACK/NACK Analysis

Uplink Analysis in the Demod Mode

The ACK/NACK analysis detects and displays the arrival of ACK and NACK indications, DTX (Discontinuous Transmission), and CQI (Channel Quality Indicator) from the UE (User Equipment). Also, measures the power versus time against a mask and display other contents of the indications.

Figure 2-39 shows an example of the ACK/NACK analysis measurement display.

Time slot table (From the left) Index: Time slot index TS: Time slot number ACK: ACK/NACK/DTX detected in this time slot CQI: CQI detected in this time slot

(the number defined in 3GPP-R5)

Offset:Subframe to time-slot offset

(refer to

Subframe to TS Offset

on page 2-50)

Symbol table

Yellow text: ACK/NACK Blue text: CQI xxx...: DTX

Figure 2-39: ACK/NACK

When the TS index is changed to a time slot that does not contain the beginning of an HS-DPCCH subframe, the symbol table text is all white. When an ACK or NACK time slot is selected, the symbol table text color changes to show the position of the ACK/NACK symbols (yellow) and the CQI symbols (blue).

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Syntax and Commands

Command Groups

This section lists the commands added in Option 27 in two ways. It first presents them by functional groups. It then lists them alphabetically. The functional group list starts below. The alphabetical list provides more detail on each command and starts on page 3-9.

For details on the standard analyzer commands, refer to the WCA230A and WCA280A Programmer Manual (Tektronix part number 071-1255-xx).

NOTE.

Version 1999.0. However, all commands for the WCA230A/WCA280A Option 27 are not defined in the standard.

Items followed by question marks are queries; items without question marks are commands. Some items in this section have a question mark in parentheses(?) in the command header section; this indicates that the item can be both a command and a query.

Each command may be available or unavailable, depending on the current measurement mode. The Measurement Modes in each command description shows the measurement mode in which the command is available. To set the measurement mode, use the :INSTrument[:SELect] command (refer to the WCA230A and WCA280A Programmer Manual) using one of the mnemonics listed below:

Table 3-1: Measurement modes added in Option 27

The GPIB commands for the WCA200 Series analyzer are based on SCPI

Mnemonic Meaning

SADLR5_3G 3GPP-R5 downlink spectrum analysis SAULR5_3G 3GPP-R5 uplink spectrum analysis DEMDLR5_3G 3GPP-R5 downlink modulation analysis DEMULR5_3G 3GPP-R5 uplink modulation analysis

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3-1

Command Groups

Functional Groups

The commands added in Option 27 are divided into the groups listed below.

Table 3-2: List of command groups

Command group Function

:CONFigure Configure the analyzer for each measurement session. :DISPlay Control how to show waveform and measurement result on the screen. :FETCh Retrieve the measurements from the data last acquired. :MMEMory Control file saving/loading to/from the hard disk or floppy disk. :READ Obtain the measurement results with acquiring data. :SENSe Set up detailed conditions for each measurement.

The following sections list the commands by group.

NOTE.

Throughout the header descriptions in this section, the word Standard in italics is substituted for either of the following two measurement standards: SADLR5_3GPP (3GPP-R5 downlink spectrum analysis) or SAULR5_3GPP (3GPP-R5 uplink spectrum analysis).

:CONFigure Commands

Set up the analyzer in order to perform the specified measurement.

Table 3-3: :CONFigure commands

Header Description

:CONFigure:DLR5_3GPP Sets the analyzer for the modulation analysis in 3GPP-R5 downlink. :CONFigure: :CONFigure: :CONFigure: :CONFigure: :CONFigure:SADLR5_3GPP:MCAClr Sets the analyzer to the multi-carrier ACLR measurement default settings. :CONFigure: :CONFigure: :CONFigure:ULR5_3GPP Sets the analyzer for the modulation analysis in 3GPP-R5 uplink.

Standard Standard Standard Standard

Standard Standard

:ACLR Sets the analyzer to the ACLR measurement default settings. :CFRequency Sets the analyzer to the carrier frequency measurement default settings. :CHPower Sets the analyzer to the channel power measurement default settings. :EBWidth Sets the analyzer to the EBW measurement default settings.

:OBWidth Sets the analyzer to the OBW measurement default settings. :SEMask Sets the analyzer to the spectrum emission mask test default settings.

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Command Groups

:DISPlay Commands

Control how to show measurement data on the screen.

Table 3-4: :DISPlay commands

Header Description

:DISPlay:DLR5_3GPP subgroup

:DISPlay:DLR5_3GPP:AVIew:CCODe(?) Sets the channelization code to position the marker. :DISPlay:DLR5_3GPP:AVIew:MSLot:HEAD(?) Sets the number of the head of the time slot to be displayed. :DISPlay:DLR5_3GPP:AVIew:MSLot[:STATe](?) Determines whether to display the multiple or the single slot. :DISPlay:DLR5_3GPP:AVIew:SHORtcode(?) Selects the short code to display. :DISPlay:DLR5_3GPP:AVIew:SRATe(?) Selects the symbol rate for downlink analysis. :DISPlay:DLR5_3GPP:AVIew:SSCHpart(?) Determines whether to show SCH. :DISPlay:DLR5_3GPP:AVIew:TSLot(?) Selects the time slot to display. :DISPlay:DLR5_3GPP:MVIew|:SVIew:COLor[:SCALe]:OFFSet(?) Sets the minimum color-axis value (bottom end) in the main view. :DISPlay:DLR5_3GPP:MVIew|:SVIew:COLor[:SCALe]:RANGe(?) Sets the color-axis full scale in the main view. :DISPlay:DLR5_3GPP:MVIew|:SVIew:FORMat(?) Selects the main view display format. :DISPlay:DLR5_3GPP:MVIew|:SVIew:RADix(?) Selects the base of symbols in the main view. :DISPlay:DLR5_3GPP:MVIew|:SVIew:X[:SCALe]:OFFSet(?) Sets the minimum horizontal value (left end) in the main view. :DISPlay:DLR5_3GPP:MVIew|:SVIew:X[:SCALe]:RANGe(?) Sets the horizontal full scale in the main view. :DISPlay:DLR5_3GPP:MVIew|:SVIew:Y[:SCALe]:FIT Runs auto-scale on the main view. :DISPlay:DLR5_3GPP:MVIew|:SVIew:Y[:SCALe]:FULL Sets the main view’s vertical axis to the default full scale. :DISPlay:DLR5_3GPP:MVIew|:SVIew:Y[:SCALe]:OFFSet(?) Sets the minimum vertical value (bottom end) in the main view. :DISPlay:DLR5_3GPP:MVIew|:SVIew:Y[:SCALe]:PUNit(?) Selects the unit for the main view’s vertical axis. :DISPlay:DLR5_3GPP:MVIew|:SVIew:Y[:SCALe]:RANGe(?) Sets the vertical full scale in the main view.

:DISPlay:

:DISPlay: :DISPlay: :DISPlay: :DISPlay: :DISPlay: :DISPlay: :DISPlay:ULR5_3GPP subgroup Related to modulation analysis for 3GPP-R5 uplink :DISPlay:ULR5_3GPP:AVIew:CNUMber(?) Sets the channelization code to position the marker. :DISPlay:ULR5_3GPP:AVIew:SRATe(?) Selects the symbol rate for uplink analysis. :DISPlay:ULR5_3GPP:AVIew:TSLot(?) Selects the time slot to display. :DISPlay:ULR5_3GPP:MVIew|:SVIew:COLor[:SCALe]:OFFSet(?) Sets the minimum color-axis value (bottom end) in the subview. :DISPlay:ULR5_3GPP:MVIew|:SVIew:COLor[:SCALe]:RANGe(?) Sets the color-axis full scale in the subview. :DISPlay:ULR5_3GPP:MVIew|:SVIew:FORMat(?) Selects the subview display format. :DISPlay:ULR5_3GPP:MVIew|:SVIew:RADix(?) Selects the base of symbols in the subview. :DISPlay:ULR5_3GPP:MVIew|:SVIew:X[:SCALe]:OFFSet(?) Sets the minimum horizontal value (left end) in the subview. :DISPlay:ULR5_3GPP:MVIew|:SVIew:X[:SCALe]:RANGe(?) Sets the horizontal full scale in the subview.

Standard

Standard Standard Standard Standard Standard Standard

subgroup Related to spectrum analysis for 3GPP-R5 downlink :SPECtrum:X[:SCALe]:OFFSet(?) Sets the minimum horizontal value (left end). :SPECtrum:X[:SCALe]:PDIVision(?) Defines the display area along the horizontal axis. :SPECtrum:Y[:SCALe]:FIT Runs auto-scale. :SPECtrum:Y[:SCALe]:FULL Sets the vertical axis to the default full scale. :SPECtrum:Y[:SCALe]:OFFSet(?) Sets the minimum vertical value (bottom end). :SPECtrum:Y[:SCALe]:PDIVision(?) Sets the vertical full scale.

Related to modulation analysis for 3GPP-R5 downlink

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Command Groups

Table 3-4: :DISPlay commands (cont.)

Header Description

:DISPlay:ULR5_3GPP:MVIew|:SVIew:Y[:SCALe]:FIT Runs auto-scale on the subview. :DISPlay:ULR5_3GPP:MVIew|:SVIew:Y[:SCALe]:FULL Sets the subview’s vertical axis to the default full scale. :DISPlay:ULR5_3GPP:MVIew|:SVIew:Y[:SCALe]:OFFSet(?) Sets the minimum vertical value (bottom end) in the subview. :DISPlay:ULR5_3GPP:MVIew|:SVIew:Y[:SCALe]:PUNit(?) Selects the unit for the subview’s vertical axis. :DISPlay:ULR5_3GPP:MVIew|:SVIew:Y[:SCALe]:RANGe(?) Sets the vertical full scale in the subview.

:FETCh Commands

The :FETCh commands retrieve the measurements from the data taken by the latest INITiate command.

If you want to perform a FETCh operation on fresh data, use the :READ commands, which acquire a new input signal and fetch the measurement results from that data.

Table 3-5: :FETCh commands

Header Description :FETCh:DLR5_3GPP subgroup Related to modulation analysis for 3GPP-R5 downlink

:FETCh:DLR5_3GPP? Returns measurement results of the downlink modulation analysis.

:FETCh:

:FETCh: :FETCh: :FETCh: :FETCh: :FETCh:SADLR5_3GPP:MCAClr? Returns the multi-carrier ACLR measurement results. :FETCh: :FETCh: :FETCh: :FETCh: :FETCh: :FETCh: :FETCh:SADLR5_3GPP:SPECtrum:MCAClr? Returns spectrum waveform data of the multi-carrier ACLR measurement. :FETCh: :FETCh: :FETCh:ULR5_3GPP subgroup Related to modulation analysis for 3GPP-R5 uplink :FETCh:ULR5_3GPP? Returns measurement results of the uplink modulation analysis.

Standard

Standard Standard Standard Standard

Standard Standard Standard Standard Standard Standard

Standard Standard

subgroup 3GPP-R5 spectrum analysis related :ACLR? Returns the ACLR measurement results. :CFRequency? Returns the carrier frequency measurement results. :CHPower? Returns the channel power measurement results. :EBWidth? Returns the EBW measurement results.

:OBWidth? Returns the OBW measurement results. :SEMask? Returns the spectrum emission mask measurement results. :SPECtrum:ACLR? Returns spectrum waveform data of the ACLR measurement. :SPECtrum:CFRequency? Returns spectrum waveform data of the carrier frequency measurement. :SPECtrum:CHPower? Returns spectrum waveform data of the channel power measurement. :SPECtrum:EBWidth? Returns spectrum waveform data of the EBW measurement.

:SPECtrum:OBWidth? Returns spectrum waveform data of the OBW measurement. :SPECtrum:SEMask? Returns spectrum waveform data of the spectrum emission mask measurement.

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WCA230A & WCA280A Option 27 User Manual

:MMEMory Commands

Use these commands to manipulate files on the hard disk or floppy disk.

Table 3-6: :MMEMory commands

Header Description

:MMEMory:LOAD:LIMit Loads the limit from the specified file. :MMEMory:STORe:LIMit Stores the limit in the specified file. :MMEMory:STORe:STABle Stores the symbol table in the specified file.

:READ Commands

The :READ commands acquire an input signal once in the single mode and obtain the measurement results from that data.

If you want to fetch the measurement results from the data currently residing in the memory without acquiring the input signal, use the :FETCh commands.

Command Groups

Table 3-7: :READ commands

Header Description

:READ:

Standard

:READ:

Standard

:READ:

Standard

:READ:

Standard

:READ:SADLR5_3GPP:MCAClr? Returns the multi-carrier ACLR measurement results. :READ:

Standard

:READ:

Standard

:READ:

Standard

:READ:

Standard

:READ:

Standard Standard

:READ: :READ:SADLR5_3GPP:SPECtrum:MCAClr? Returns spectrum waveform data of the multi-carrier ACLR measurement. :READ:

Standard

:READ:

Standard

:ACLR? Returns the ACLR measurement results. :CFRequency? Returns the carrier frequency measurement results. :CHPower? Returns the channel power measurement results. :EBWidth? Returns the EBW measurement results.

:SPECtrum:OBWidth? Returns spectrum waveform data of the OBW measurement. :SPECtrum:SEMask? Returns spectrum waveform data of the spectrum emission mask measurement.

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Command Groups

:SENSe Commands

Set the detailed measurement conditions.

Table 3-8: :SENSe commands

Header Description

[:SENSe]:DLR5_3GPP subgroup Related to the 3GPP-R5 modulation analysis.

[:SENSe]:DLR5_3GPP:BLOCk(?) Sets the number of the block to measure. [:SENSe]:DLR5_3GPP:CARRier:OFFSet(?) Sets the carrier frequency offset. [:SENSe]:DLR5_3GPP:CARRier:SEARch(?) Determines whether to detect the carrier automatically. [:SENSe]:DLR5_3GPP:COMPosite(?) Determines whether to perform the composite analysis. [:SENSe]:DLR5_3GPP:DTYPe:SEARch(?) Determines whether to detect the demodulation type of the code channel. [:SENSe]:DLR5_3GPP:EVM:IQOoffset(?) Determines whether to include the I/Q origin offset in the analysis. [:SENSe]:DLR5_3GPP:FILTer:ALPHa(?) Sets the filter factor. [:SENSe]:DLR5_3GPP:FILTer:MEASurement(?) Selects the measurement filter. [:SENSe]:DLR5_3GPP:FILTer:REFerence(?) Selects the reference filter. [:SENSe]:DLR5_3GPP[:IMMediate] Runs the 3GPP-R5 downlink analysis calculation on the acquired data. [:SENSe]:DLR5_3GPP:LENGth(?) Defines the analysis range. [:SENSe]:DLR5_3GPP:OFFSet(?) Sets the measurement start position. [:SENSe]:DLR5_3GPP:SCHPart(?) Determines whether to include the SCH part in the analysis. [:SENSe]:DLR5_3GPP:SCODe:ALTernative(?) Selects the alternative scrambling code. [:SENSe]:DLR5_3GPP:SCODe:NUMBer(?) Sets the scrambling code. [:SENSe]:DLR5_3GPP:SCODe:SEARch(?) Determines whether to enable automatic detection of the scrambling code.

[:SENSe]:

[:SENSe]: [:SENSe]: [:SENSe]: [:SENSe]:

[:SENSe]:

[:SENSe]: :INTegration(?)

[:SENSe]: [:SENSe]: [:SENSe]:

[:SENSe]:

Standard

Standard Standard Standard Standard

Standard

Standard Standard Standard

Standard

:ACLR subgroup Related to the ACLR measurement. :ACLR:FILTer:COEFficient (?) Sets the filter factor (α/BT). :ACLR:FILTer:TYPE (?) Selects a filter. :ACLR:SGAin (?) Sets or queries the gain offset for the second adjacent channel. :ACLR:LIMit:ADJacent<x>[:STATe] (?) Determines whether to enable the adjacent limit testing.

:CFRequency subgroup Related to the carrier frequency measurement. :CFRequency:CRESolution(?) Sets the counter resolution.

:CHPower subgroup Related to the channel power measurement. :CHPower:BANDwidth|:BWIDth

:CHPower:FILTer:COEFficient(?) Sets the filter roll-off rate for the channel power measurement. :CHPower:FILTer:TYPE(?) Selects the filter for the channel power measurement :CHPower:LIMit[:STATe](?) Determines whether to enable the limit testing.

:EBWidth subgroup Related to the EBW measurement. :EBWidth:XDB(?) Sets the relative power from the peak for the measurement.

Sets the channel bandwidth for the channel power measurement.

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WCA230A & WCA280A Option 27 User Manual

Tektronix WCA230A, WCA280A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Table of Contents

Preface

About This Manual

Related Manuals

Getting Started

Analysis Definition

Measurement Menu

Uplink/Downlink Analysis in the S/A Mode

Measurement Procedure

Channel Power Measurement

ACLR Measurement

Spectrum Emission Mask Measurement

OBW Measurement

EBW Measurement

Carrier Frequency Measurement

Editing the Measurement Limits

Downlink Analysis in the Demod Mode

Measurement Procedure

Measurement Setup Menu

Scale and Format of View

Code Domain Power

Power Codogram

Code Power versus Time Slot

Code Power versus Symbol

Symbol Constellation

Symbol EVM

Symbol Eye Diagram

Symbol Table

Modulation Accuracy

Uplink Analysis in the Demod Mode

Measurement Procedure

Measurement Setup Menu

Display Method for HS-DPCCH

Scale and Format of View

Code Domain Power

Power Codogram

Code Power versus Time Slot

Code Power versus Symbol

Symbol Constellation

Symbol EVM

Symbol Eye Diagram

Symbol Table

Modulation Accuracy

ACK/NACK Analysis

Command Groups

Functional Groups

:CONFigure Commands

:DISPlay Commands

:FETCh Commands

:MMEMory Commands

:READ Commands

:SENSe Commands