Tektronix RSA3408A User Manual

User Manual

RSA3408A Option 29 WLAN 802.11a/b/g/n Analysis Software

071-1648-01

This document supports firmware version 3.31 and above.

www.tektronix.com

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Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes that in all previously published material. Specifications and price change privileges reserved.

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Contacting Tektronix

Tektronix, Inc. 14200 SW Karl Braun Drive P.O . B o x 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 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

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

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

Getting Started

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

Measurement Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Accessing the Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Operating Basics

Operating Basics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Screen Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Setting Frequency and Span. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Setting Timing Parameters. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

View Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Saving Measurement Results. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9

Reference

IEEE802.11a/b/g Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Basic Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Meas Setup Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Measurement Setup for Modulation Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Measurement Setup for Spectrum Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Measurement Setup for Transmit Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

View Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

View Format for Modulation Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

View Format for Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37

802.11n (nx1) Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43

Data Process Flow for MISO (2x1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44

Basic Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-45

Meas Setup Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-46

Measurement Setup for Modulation Measurements . . . . . . . . . . . . . . . . . . . . . . . . . 3-47

Measurement Setup for Spectrum Mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-52

View Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-55

View Format for Modulation Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-57

View Format for Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-90

802.11n MIMO Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93

Data Process Flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-93

Basic Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95

Meas Setup Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-98

View Format. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-102

RSA3408A Option 29 User Manual

Table of Contents

Appendices

Glossary and Index

Appendix A: Scale Setting Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

Appendix B: Save File Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

Transfer Function (Amplitude and Phase) and Delay Profile . . . . . . . . . . . . . . . . . . . B-2

EVM vs Time, Power vs Time, and Frequency Error. . . . . . . . . . . . . . . . . . . . . . . . . B-4

EVM vs SC, Power vs SC, and OFDM Flatness. . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-6

Symbol Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-8

RSA3408A Option 29 User Manual

List of Figures

Figure 1-1: WLAN analysis display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Figure 1-2: Signal format in IEEE802.11n analysis . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Figure 1-3: Measure menu in the WLAN analysis . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Figure 2-1: Screen elements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Figure 2-2: Timing parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Figure 2-3: Definition of the View Scale menu items . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-4: Setting packets to be saved . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Figure 3-1: IEEE802.11a/b/g measurement menu . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Figure 3-2: Modulation Type Display Filter setting . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-3: IEEE802.11a/b spectrum mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-4: Burst indicator on the overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-5: EVM versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-6: MagErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Figure 3-7: PhaseErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Figure 3-8: Power versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-9: Constellation (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-10: EVM versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Figure 3-11: EVM versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

Figure 3-12: MagErr versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Figure 3-13: MagErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Figure 3-14: PhaseErr versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Figure 3-15: PhaseErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Figure 3-16: Power versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

Figure 3-17: Power versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Figure 3-18: Symbol Constellation (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

Figure 3-19: Symbol Constellation (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

Figure 3-20: Frequency error (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Figure 3-21: OFDM flatness (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

Figure 3-22: OFDM linearity (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-35

Figure 3-23: Symbol table (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-36

Figure 3-24: Spectrum mask (OFDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-37

Figure 3-25: Spectrum mask (DSSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-39

Figure 3-26: Transmit power on (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40

Figure 3-27: IEEE802.11b Transmit power-on ramp . . . . . . . . . . . . . . . . . . . . . 3-41

Figure 3-28: Transmit power down (main view) . . . . . . . . . . . . . . . . . . . . . . . . . 3-42

Figure 3-29: IEEE802.11b Transmit power-down ramp . . . . . . . . . . . . . . . . . . 3-42

Figure 3-30: IEEE802.11n (nx1) measurement menu . . . . . . . . . . . . . . . . . . . . . 3-43

Figure 3-31: Data process flow for MISO (2x1) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44

Figure 3-32: Modulation Type Display Filter setting in the nx1 analysis . . . . . 3-50

Figure 3-33: 802.11n (nx1) spectrum mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-52

Figure 3-34: Editing the spectral mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53

Figure 3-35: List display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-56

Figure 3-36: Measurement result display (an example of EVM versus Time) . 3-57

Figure 3-37: Transfer function, amplitude (main view) . . . . . . . . . . . . . . . . . . . 3-59

RSA3408A Option 29 User Manual

iii

List of Figures

Figure 3-38: Transogram, amplitude (subview) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-60

Figure 3-39: Transfer function, phase (main view) . . . . . . . . . . . . . . . . . . . . . . . . 3-61

Figure 3-40: Transfogram, phase (subview) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-62

Figure 3-41: Delay profile (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63

Figure 3-42: Delayogram (subview) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-64

Figure 3-43: EVM versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-65

Figure 3-44: MagErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-67

Figure 3-45: PhaseErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-68

Figure 3-46: Power versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-69

Figure 3-47: Constellation (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-71

Figure 3-48: EVM versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-72

Figure 3-49: EVM versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-74

Figure 3-50: MagErr versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-75

Figure 3-51: MagErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-76

Figure 3-52: PhaseErr versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-77

Figure 3-53: PhaseErr versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-78

Figure 3-54: Power versus SC (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-79

Figure 3-55: Power versus Time (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-81

Figure 3-56: Symbol Constellation (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-82

Figure 3-57: Symbol Constellation (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . 3-83

Figure 3-58: Frequency error (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-84

Figure 3-59: OFDM flatness (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-86

Figure 3-60: OFDM linearity (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-88

Figure 3-61: Symbol table (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-89

Figure 3-62: Spectrum mask (OFDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-90

Figure 3-63: IEEE802.11n MIMO 2x2 measurement menu . . . . . . . . . . . . . . . . 3-93

Figure 3-64: MIMO (2x2) data process flow . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-94

Figure 3-65: Connecting the rear panel connectors . . . . . . . . . . . . . . . . . . . . . . . 3-95

Figure 3-66: Transferring captured data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-96

Figure 3-67: Modulation Type Display Filter setting in the MIMO analysis . . 3-100

Figure 3-68: List display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-103

Figure 3-69: Waveform Rx1/2 (subview) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-104

Figure 3-70: Transfer function, amplitude (main view) . . . . . . . . . . . . . . . . . . . 3-105

Figure 3-71: Transfogram, amplitude (subview) . . . . . . . . . . . . . . . . . . . . . . . . 3-106

Figure 3-72: Transfer function, phase (main view) . . . . . . . . . . . . . . . . . . . . . . . 3-107

Figure 3-73: Transfogram, phase (subview) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-108

Figure 3-74: Delay profile (main view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-109

Figure 3-75: Delayogram (subview) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-110

Figure B-1: Measurement results file (an example of amplitude

transfer function) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1

RSA3408A Option 29 User Manual

List of Tables

Table 1-1: IEEE802.11 standards . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Table 1-2: Option 29 WLAN measurement items . . . . . . . . . . . . . . . . . . . . . . . . . 1-2

Table 2-1: Channel table for the WLAN analysis . . . . . . . . . . . . . . . . . . . . . . . . . 2-3

Table 2-2: Span setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Table 3-1: Measurement setup reference for the 802.11a/b/g analysis . . . . . . . . 3-4

Table 3-2: Modulation detection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Table 3-3: Submenu availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Table 3-4: Length of an analysis symbol, IEEE802.11a/g . . . . . . . . . . . . . . . . . . . 3-7

Table 3-5: View content selection, IEEE802.11a/b/g . . . . . . . . . . . . . . . . . . . . . . 3-11

Table 3-6: Vertical setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Table 3-7: Vertical setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Table 3-8: Measurement setup reference for the 802.11n (nx1) analysis . . . . . 3-46

Table 3-9: Submenu availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-48

Table 3-10: Length of an analysis symbol, IEEE802.11n . . . . . . . . . . . . . . . . . . 3-49

Table 3-11: View content selection, 802.11n (nx1) . . . . . . . . . . . . . . . . . . . . . . . . 3-55

Table 3-12: Vertical setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-66

Table 3-13: Vertical setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-73

Table 3-14: Submenu availability . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-99

Table 3-15: View content selection, 802.11n MIMO (2x2) . . . . . . . . . . . . . . . . 3-102

Table A-1: Scale setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1

RSA3408A Option 29 User Manual

List of Tables

RSA3408A Option 29 User Manual

Preface

About This Manual

This manual provides operating instructions for the RSA3408A Real-Time Spectrum Analyzer Option 29 WLAN 802.11a/b/g/n Analysis Software.

This manual is composed of the following sections:

 Getting Started provides overviews of the product and its functions.

 Operating Basics provides information needed for routine operation.

 Reference describes the measurement procedure, setup menu, and view format

specific to Option 29 in detail.

 Appendices provides additional information, including the scale setting range

and save file format.

The analyzer uses Microsoft Windows XP as the operating system. This manual does not describe common usage of Windows XP. Refer to your Windows manuals as necessary.

Related Manuals

PDF Manual

The following related documents are also available:

 RSA3408A User Manual

(Standard accessory; Tektronix part number 071-1617-XX) Describes how to install the analyzer and how to work with the menus, and details the standard functions. Also shows the specifications.

 RSA3408A Programmer Manual

(Standard accessory; PDF, Tektronix part number 077-0003-XX) Contains an alphabetical listing of the programming commands and other information related to controlling the analyzer over the GPIB interface.

The programmer manual described above is a PDF document (the file size is about 3 MB). The file is stored in this directory on the analyzer hard disk:

C:\Program Files\Tektronix\wca200a\Manuals

Use the USB or LAN interface to copy the file onto your PC. Refer to the RSA3408A User Manual for information about using the interface.

RSA3408A Option 29 User Manual

vii

Preface

viii

RSA3408A Option 29 User Manual

Getting Started

RSA3408A Option 29 is the WLAN 802.11a/b/g/n analysis software that performs signal measurements for high-speed wireless LAN transmitters in 5 GHz and

2.4 GHz bands complying with the IEEE802.11 a, b, g, and n standards. Table 1-1 summarizes the IEEE802.11 standards.

Table 1-1: IEEE802.11 standards

WLAN standard Frequency band Modulation method Tx rate (max)

IEEE802.11a 5 GHz OFDM BPSK, QPSK, 16QAM 54Mbps IEEE802.11b 2.4 GHz DSSS DBPSK, DQPSK, CCK 11Mbps IEEE802.11g 2.4 GHz OFDM-CCK DBPSK, DQPSK, CCK, BPSK, QPSK, 16QAM 54Mbps

PBCC DBPSK, DQPSK, CCK, PBCC 33Mbps OFDM BPSK, QPSK, 16QAM 54Mbps

IEEE802.11n 2.4 GHz / 5 GHz OFDM BPSK, QPSK, 16QAM, 64QAM >100Mbps

This software is compliant with Draft 11n as of December 2006.

Figure 1-1 shows a typical display example of WLAN analysis.

Figure 1-1: WLAN analysis display

RSA3408A Option 29 User Manual

1-1

Getting Started

Measurement Items

Table 1-2 shows all the measurement and display items available in Option 29 WLAN analysis software and the supported standards. The measurement items are classified into Modulation measurement and Power measurement.

Table 1-2: Option 29 WLAN measurement items

Measurement Measure menu item Modulation measurement

Transfer Function (Amplitude and Phase)

Delay Profile EVM versus Time EVM

Power versus Time Constellation EVM versus SC EVM

Power versus SC SC Constellation Frequency Error OFDM Flatness OFDM Linearity Symbol Table -

Power measurement

Spectrum Mask Transmit Power -

Abbreviation. Err: Error; Mag: Magnitude; SC: Subcarrier. Refer to

contents

Mag Err

Phase Err

Mag Err

Phase Err

802.11a 802.11b 802.11g

✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓

✓ ✓ ✓ ✓ ✓

Glossary

802.11n (

nx1

)

✓ ✓

for acronyms.

802.11n (MIMO)

1-2

Selectable in the View Scale menu.

NOTE.

For the 802.11n standard, this software is compliant with Draft 11n as of

December 2006.

RSA3408A Option 29 User Manual

Getting Started

Signal Format in

IEEE802.11n Analysis

IEEE802.11n analysis consists of 802.11n (nx1) and MIMO (2x2) analyses, supporting three signal formats as shown in Figure 1-2.

802.11n (nx1) analysis

SISO 1x1 (one Tx antenna and one Rx antenna)

Transmission

Antenna

MISO 2x1 (two Tx antennas and one Rx antenna)

Transmission

802.11n MIMO (2x2) analysis

MIMO 2x2 (two Tx antennas and two Rx antennas)

Reception

Transmission

OutputPropagation pathInput

Reception

Figure 1-2: Signal format in IEEE802.11n analysis

MIMO (Multi-Input Multi-Output) uses more than one antennas for both transmitting and receiving to transfer data at the same time. Radio signals input from the transmitter go through multiple propagation paths and output to the receiver. Multiple antennas send and receive different data streams simultaneously over multiple paths as independent channels, resulting in a higher transmission rate along with the number of antennas. Special, degenerated cases of MIMO are

MISO (Multi-Input Single-Output) when the receive antenna is single, and SISO (Single-Input Single-Output) when both transmit and receive antennas

are traditionally single. The Option 29 WLAN analysis software supports three signal formats: SISO 1x1, MISO 2x1, and MIMO 2x2.

RSA3408A Option 29 User Manual

1-3

Getting Started

Accessing the Measurements

The Option 29 WLAN measurement functions are contained in the Demod mode as shown in Figure 1-3. The analysis is categorized into three groups: IEEE

802.11a/b/g, 802.11n (nx1, Multi-Input Single-Output), and 802.11n MIMO (Multi-Input Multi-Output, 2x2).

MODE

S/A

DEMOD

TIME

Measure menu items

Standard... IEEE802.11a/b/g EVM versus Time

Power ve r sus Time Constellation EVM versus SC Power ve r sus SC SC Constellation Frequency Error OFDM Flatness OFDM Linearity Symbol Table Spectrum Mask Tra n s m i t Po w e r

802.11n (nx1) Transfer Function (Amp)

802.11n MIMO (2x2) Transfer Function (Amp)

Transfer Function (Phase) Delay Profile EVM versus Time Power ve r sus Time Constellation EVM versus SC Power ve r sus SC SC Constellation Frequency Error OFDM Flatness OFDM Linearity Symbol Table Spectrum Mask

Transfer Function (Phase) Delay Profile EVM versus Time Power ve r sus Time Constellation EVM versus SC Power ve r sus SC SC Constellation Frequency Error Symbol Table

1-4

Figure 1-3: Measure menu in the WLAN analysis

RSA3408A Option 29 User Manual

Operating Basics

This section describes the basic operation specific to the WLAN analysis with the following topics:

 Screen Elements

 Setting Frequency and Span

 Setting Timing Parameters

 View Operation

 Saving Measurement Results

NOTE.

User Manual.

For complete details on operating the analyzer, refer to the RSA3408A

RSA3408A Option 29 User Manual

2-1

Operating Basics

Screen Elements

Figure 2-1 shows the screen elements of the WLAN analysis. The analysis runs in the Demod (modulation analysis) mode and displays the following three views on the screen. The spectrum mask measurement is an exception; it uses a single view like the S/A (Spectrum Analyzer) mode.

 Overview. Displays all data in one acquisition block. Use this overview to set

the timing parameters such as acquisition length and analysis length (refer to Setting Timing Parameters on page 2-6).

 Main view. Displays the measurement results and waveform for the range

specified in the overview.

 Subview. Displays the spectrum (by default) for the range specified in the

overview. You can select the view content with the View Define menu.

For details on setting the views, refer to View O pe rati o n on page 2-7.

Hardware setting

Main view

Trigger status

SubviewOverview

Side menu

2-2

Current setting

Figure 2-1: Screen elements

RSA3408A Option 29 User Manual

Setting Frequency and Span

Use the FREQUENCY/CHANNEL and the SPAN keys on the front panel to set frequency and span. For WLAN analysis, you can use the channel tables shown in Table 2-1.

Table 2-1: Channel table for the WLAN analysis

Channel Table Channel Center frequency (GHz)

IEEE 802.11a 34 5.170

Operating Basics

36 5.180 38 5.190 40 5.200 42 5.210 44 5.220 46 5.230 48 5.240 52 5.260 56 5.280 60 5.300 64 5.320 100 5.500 104 5.520 108 5.540 112 5.560 116 5.580 120 5.600 124 5.620 128 5.640 132 5.660 136 5.680 140 5.700 149 5.745 153 5.765 157 5.785 161 5.805

RSA3408A Option 29 User Manual

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Operating Basics

Table 2-1: Channel table for the WLAN analysis (cont.)

Channel Table Channel Center frequency (GHz)

IEEE 802.11b/g 1 2.412

2 2.417 3 2.422 4 2.427 5 2.432 6 2.437 7 2.442 8 2.447 9 2.452 10 2.457 11 2.462 12 2.467 13 2.472 14 2.484

IEEE 802.11n (2.4 GHz)

IEEE 802.11n (5 GHz)

1 2.422 2 2.427 3 2.432 4 2.437 5 2.442 6 2.447 7 2.452 1 5.190 2 5.230 3 5.270 4 5.310 5 5.510 6 5.550 7 5.590 8 5.630 9 5.670 10 5.755 11 5.795

2-4

RSA3408A Option 29 User Manual

Operating Basics

The span setting depends on the measurement item as shown in Table 2-2.

Table 2-2: Span setting

Analysis type Measurement item Span

Modulation analysis Transfer Function 20 or 36 MHz

Delay Profile EVM versus Time Power versus Time Constellation EVM versus SC Power versus SC SC Constellation Frequency Error OFDM Flatness OFDM Linearity Symbol Table

Power analysis Spectrum Mask 100 MHz to 3 GHz

Transmit Power 20 or 36 MHz

(The default is 36 MHz)

RSA3408A Option 29 User Manual

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Operating Basics

Setting Timing Parameters

Press the TIMING key to set the timing parameters described below on the overview (see Figure 2-2).

Acquisition Length.

Acquisition History.

Spectrum Length.

Spectrum Offset.

Analysis Length.

Analysis Offset.

Output Trigger Indicator.

Sets the time to acquire one block.

Specifies the number of the block to analyze and display.

Shows time for FFT to display spectrum in the subview.

Sets the beginning of Spectrum Length.

Sets the analysis range in time units (max. 100 ms).

Sets the beginning of Analysis Length.

Turns on or off the output trigger indicator.

For details on setting the timing and trigger, refer to the RSA3408A User Manual.

Analysis Offset

Spectrum Offset

Acquisition History

Analysis Length

2-6

Overview

The data in the analysis range (indicated by the green lines) is analyzed and the result is displayed in the main view.

Output Trigger Indicator

Acquisition Length

Figure 2-2: Timing parameters

NOTE.

Only Acquisition Length is available in the Transmit Power measurement.

The Timing menu is not available in the Spectrum Mask measurement.

RSA3408A Option 29 User Manual

View Operation

Operating Basics

This section provides view operating basics, addressing the following topics:

 Changing the View Content

 Selecting the Phase Unit

 Scaling the Graph

Changing the View Content

Selecting the Phase Unit

You can change the view content with the VIEW: DEFINE key on the front panel. The View Define menu has the following controls.

Show Views.

 Single. Displays one view on screen.

Selects the single or multi view.

Select the view with the VIEW: SELECT key.

 Multi. Displays the overview, the main view, and the subview on screen.

Overview Content...

Subview Content...

Selects the overview content.

Selects the subview content.

The view contents depend on the measurement items. Refer to each

The phase unit in the EVM measurement defaults to degrees. You can select degrees or radians using the following steps:

1. Press the SYSTEM key.

2. Press the Instrument Setup... side key.

3. Press the Angular Units side key to select Degrees or Radians.

RSA3408A Option 29 User Manual

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Operating Basics

Scaling the Graph

You can expand a waveform horizontally and vertically using the VIEW: SCALE key on the front panel (you cannot compress the original waveform). The scale setting affects only the display; it does not change the acquisition parameters such as span, center frequency, and reference level. Although the View Scale menu varies with the measurement items, it has commonly the following controls as shown in Figure 2-3.

Horizontal Scale.

Horizontal Start.

Vertical Scale.

Vertical Start.

Vertical Offset.

Vertical Stop.

Ver t i ca l S t o p

Sets the range of the horizontal axis.

Sets the minimum value (left edge) of the horizontal axis.

Sets the range of the vertical axis.

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

Sets the center value of the vertical axis.

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

Vertical Offset

Vertical Start

Horizontal Scale

Horizontal Start

Ver tica l S c ale

Figure 2-3: Definition of the View Scale menu items

Press the VIEW: SELECT key to select a view before scaling the graph using the SCALE key. Chapter 3, Reference, describes the View Scale menu for each

measurement item. Refer to the following sections:

 IEEE802.11a/b/g Analysis: View Format on page 3-11

 IEEE802.11n (nx1) Analysis: View Format on page 3-55

 IEEE802.11n MIMO (2x2) Analysis: View Format on page 3-102

2-8

RSA3408A Option 29 User Manual

Saving Measurement Results

You can save measurement results to files using the SAVE key on the front panel.

Operating Basics

Save Menu

NOTE.

This section provides information about file save specific to Option 29

WLAN analysis. For details on standard file operations, refer to the RSA3408A

User Manual.

The Save menu for the modulation measurements has the following controls.

Save State.

Save Data...

Saves the instrument settings.

Saves the input waveform (IQ data in the time domain) to a file in the

IQT format.

 All Blocks. Saves all the acquired blocks.

 Current Block. Saves the block currently displayed in the overview.

 Current Area. Saves the data in the analysis range.

Save Mainview Results.

802.11n nx1 and MIMO (2x2) analyses only. Saves the measurement results to a file in the CSV (Comma Separated Values) format. You can import the file into Microsoft Excel or other database systems. Refer to

Appendix B for the save format.

Submenu items for the transfer function and delay profile measurements:

 Trace 1. Saves Trace 1 to a specified file.

 Trace 2. Saves Trace 2 to a specified file.

 Trace 1 and 2. Saves Trace 1 and 2 to two files with the file names of “1” and

“2” added respectively to a specified name.

 All Data. MIMO (2x2) analysis only. Saves Trace 1 and 2 to a specified file in

all combinations of the Tx and Rx antennas.

 Packets Offset. Specifies the first packet to save. (See Figure 2-4.)

Range: −[(the number of packets in the analysis range) − 1] to 0. Zero (0) represents the latest packet.

 Number of Packets. Sets the number of packets to save. (See Figure 2-4.)

Range: 1 to [−(Packet Offset) + 1].

RSA3408A Option 29 User Manual

2-9

Operating Basics

Packets Offset

Packet

−

……

Saved to a file

Number of Packets

−

Figure 2-4: Setting packets to be saved

Submenu items for other than transfer function and delay profile measurements (MIMO (2x2) analysis only):

 Trace Data . Saves the displayed trace data to a specified file.

 All Data. Saves the trace data to a specified file in all combinations of the Tx

and Rx antennas.

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RSA3408A Option 29 User Manual

+ 130 hidden pages

Tektronix RSA3408A User Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Warranty 2

Table of Contents

Preface

About This Manual

Related Manuals

Getting Started

Measurement Items

Accessing the Measurements

Operating Basics

Screen Elements

Setting Frequency and Span

Setting Timing Parameters

View Operation

Saving Measurement Results