Tektronix WCA11G User Manual

User Manual

WCA11G
IEEE802.11a/b/g Signal Analysis Software

071-1365-00

This document supports firmware version FV:v1.00 and above.

www.tektronix.com

Copyright © Tektronix, Inc. All rights reserved.

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

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TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.

SOFTWARE WARRANTY SUMMARY

Tektronix warrants that its software products will conform to the specifications in the documentation provided with
the product, when used properly in the specified operating environment, for a period of three (3) months. The warranty
period begins on the date of shipment, except that if the program is installed by Tektronix, the warranty period begins
on the date of installation or one month after the date of shipment, whichever is earlier. If the software product does
not conform as warranted, Tektronix will provide the remedial services as described in the documentation provided
with the product.

For products offered without documentation, Tektronix warrants that the media on which the software product is
furnished and the encoding of the programs on the media will be free from defects in materials and workmanship for
a period of three (3) months from the date of shipment. If any such medium or encoding proves defective during the
warranty period, Tektronix will provide a replacement in exchange for the defective medium. Except as to the media
on which the software product is furnished, the software product is provided ”as is” without warranty of any kind,
either express or implied.

Tektronix does not warrant that the functions contained in any software product will meet Customer’s requirements or
that the operation of the programs will be uninterrupted or error-free.

In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
the warranty period and, for warranted products, make suitable arrangements for such service in accordance with the
instructions received from Tektronix. If Tektronix is unable, within a reasonable time after receipt of such notice, to
provide remedial service for warranted products or, for ”as is” products, to provide a replacement that is free from
defects in materials and workmanship, Customer may terminate the license for the software product and return the
software product and any associated materials for credit or refund.

The above warranties shall not apply to any software product that has been modified or altered by Customer. Tektronix
shall not be obligated to furnish service under this warranty with respect to any software product a) that is used in an
operating environment other than that specified or in a manner inconsistent with the User Manual and documentation;
or b) when the software product has been integrated with other software if the result of such integration increases the
time or difficulty of analyzing or servicing the software product or the problems ascribed in the software product.

THE ABOVE WARRANTIES ARE GIVEN BY TEKTRONIX WITH RESPECT TO THE LISTED
PRODUCTS 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 PROVIDE REMEDIAL SERVICE
WHEN SPECIFIED, REPLACE DEFECTIVE MEDIA, OR REFUND CUSTOMER’S PAYMENT, AS
APPLICABLE, IS THE SOLE AND EXCLUSIVE REMEDY PROVIDED TO CUSTOMER FOR BREACH
OF EITHER WARRANTY. TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY
INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF
WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH
DAMAGES.

Table of Contents

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

Manual Structure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

Related Manual and Online Document . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii

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

Glossary of Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . ix

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

Product Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Hardware Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-7

Accessories. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

System Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

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

Screen Elements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1

Graph Window Pane . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Modulation Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Modulation Analysis View Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

IEEE802.11a Measurements. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-3

IEEE802.11b Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-4

IEEE802.11g Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Difference between WCA330 and WCA380 Analyzers . . . . . . . . . . . . . . . . . . . . 1-7

PC System Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Installation Instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-8

Created Folders. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-9

Sharing the Folders on a PC . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-10

Setting the Network Parameters of the Analyzer . . . . . . . . . . . . . . . . . . . . . . . . . 1-12

Network Setting of Windows 98 PC. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-17

Network Setting of a PC Running Windows 2000 or Windows XP . . . . . . . . . . 1-19

Registering a User Name for MS Windows 2000 or MS Windows XP. . . . . . . . 1-22

Menu Bar . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Analysis Type buttons. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Graph Frame . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Modulation Analysis Setting Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6

Power Analysis Setting Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

View Function. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Scale Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Modulation Analysis Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1

Power vs. All Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Average Power vs. Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Power Analysis Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Power vs. SC_No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Power vs. Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Flatness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Constellation Analysis Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Constellation/Symbol Constellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

WCA11G IEEE802.11a/b/g User Manual i

Table of Contents

Constellation/Segment Constellation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Average EVM vs. Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

EVM Analysis Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

EVM vs. SC_No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

EVM vs. Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Average MagErr vs Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

MagErr Analysis Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17

MagErr vs. SC_No. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

MagErr vs. Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Average PhaseErr vs Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

PhaseErr Analysis Display. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21

PhaseErr vs SC_No . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

PhaseErr vs Time. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Center Frequency Error . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

OFDM Linearity . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Symbol Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

Power Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Power Analysis Test Procedure . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-28

Power Analysis View Formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

Spectrum Mask (OFDM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

Spectrum Mask (DSSS). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Transmit Power On . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32

Transmit Power Off . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1

ii WCA11G IEEE802.11a/b/g User Manual

List of Figures

List of Figures

Figure 1-1: WCA11G signal analysis system hardware configuration . . . . . . . . 1-7

Figure 1-2: ShareFolder Properties dialog box (MS Windows 98) . . . . . . . . . . 1-11

Figure 1-3: ShareFolder Properties dialog box (MS Windows 2000) . . . . . . . . 1-11

Figure 1-4: Network dialog box (Identification tab) . . . . . . . . . . . . . . . . . . . . . . 1-12

Figure 1-5: TCP/IP Properties dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-13

Figure 1-6: TCP/IP Properties dialog box for address setting . . . . . . . . . . . . . . 1-14

Figure 1-7: CONFIG:UTILITY submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Figure 1-8: Util:More: submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-15

Figure 1-9: [Util H] Remote submenu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Figure 1-10: [Util H] Remote TCP/IP submenu . . . . . . . . . . . . . . . . . . . . . . . . . . 1-16

Figure 1-11: Network dialog box showing Identification tab . . . . . . . . . . . . . . . 1-17

Figure 1-12: Identification Changes dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . 1-19

Figure 1-13: Internet Protocol (TCP/IP) Properties dialog box . . . . . . . . . . . . . 1-20

Figure 1-14: Internet Protocol (TCP/IP) Properties for IP Address Assignment . . . .

1-21

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

Figure 2-2: Ethernet Setup dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4

Figure 2-3: Folder Setup dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5

Figure 2-4: Read From WCA dialog box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8

Figure 2-5: Read From WCA dialog box (IQT file) . . . . . . . . . . . . . . . . . . . . . . 2-12

Figure 2-6: Display Modulation Type dialog box . . . . . . . . . . . . . . . . . . . . . . . . 2-16

Figure 2-7: 1 * 1 screen display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Figure 2-8: 2 * 2 screen display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Figure 2-9: View format pull-down list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Figure 2-10: Scale input box . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23

Figure 3-1: Power vs. All Time display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Figure 3-2: Average Power vs. Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3

Figure 3-3: Power vs. SC_No display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Figure 3-4: Power vs. Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6

Figure 3-5: Flatness measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-7

Figure 3-6: Constellation display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Figure 3-7: Symbol Constellation display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9

Figure 3-8: Pop-up View menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Figure 3-9: Segment Constellation display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11

Figure 3-10: Average EVM vs. Time display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Figure 3-11: EVM vs. SC_No display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-13

Figure 3-12: EVM vs. Time display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15

Figure 3-13: Average MagErr vs. Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-16

Figure 3-14: MagErr vs. SC_No display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-18

Figure 3-15: MagErr vs. Time . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-19

Figure 3-16: Average PhaseErr vs. Time display . . . . . . . . . . . . . . . . . . . . . . . . . 3-20

Figure 3-17: PhaseErr vs. SC_No display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-22

Figure 3-18: PhaseErr vs. Time display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-23

Figure 3-19: Center frequency error display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-24

Figure 3-20: OFDM Linearity display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25

Figure 3-21: Symbol table (Hex) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

WCA11G IEEE802.11a/b/g User Manual iii

List of Figures

Figure 3-22: Symbol table (Bin) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-26

Figure 3-23: Spectrum mask (OFDM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-29

Figure 3-24: IEEE802.11a spectrum mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-30

Figure 3-25: Spectrum mask (DSSS) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Figure 3-26: IEEE802.11b spectrum mask . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-31

Figure 3-27: Transmit Power On display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-32

Figure 3-28: IEEE802.11b Transmit power-on ramp . . . . . . . . . . . . . . . . . . . . . . 3-32

Figure 3-29: Transmit Power Off display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-33

Figure 3-30: IEEE802.11b Transmit power-down ramp . . . . . . . . . . . . . . . . . . . 3-33

iv WCA11G IEEE802.11a/b/g User Manual

List of Tables

List of Tables

Table 1-1: WCA11G measurement items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1

Table 1-2: Measurements for IEEE802.11a signals . . . . . . . . . . . . . . . . . . . . . . . . 1-3

Table 1-3: Measurements for IEEE802.11b signals . . . . . . . . . . . . . . . . . . . . . . . . 1-4

Table 1-4: Measurements for IEEE802.11g signals . . . . . . . . . . . . . . . . . . . . . . . . 1-5

Table 1-5: Equipment used in the WCA11G signal analysis system . . . . . . . . . . 1-7

Table 2-1: Menu Bar Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2

Table 2-2: Modulation Analysis SETUP Parameters . . . . . . . . . . . . . . . . . . . . . . 2-6

Table 2-3: Modulation types . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7

Table 2-4: Read From WCA dialog box parameters . . . . . . . . . . . . . . . . . . . . . . . 2-9

Table 2-5: Channel list . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10

Table 2-6: Read From WCA dialog box (IQT) parameters . . . . . . . . . . . . . . . . 2-12

Table 2-7: Modulation Analysis VIEW Parameters . . . . . . . . . . . . . . . . . . . . . . 2-13

Table 2-8: Power Analysis SETUP Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Table 2-9: Power Analysis Test Items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-17

Table 2-10: View format - IEEE802.11a signals . . . . . . . . . . . . . . . . . . . . . . . . . 2-19

Table 2-11: View format - IEEE802.11b signals . . . . . . . . . . . . . . . . . . . . . . . . . 2-20

Table 2-12: View format - IEEE802.11g signals . . . . . . . . . . . . . . . . . . . . . . . . . 2-21

Table 3-1: Power vs. All Time parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2

Table 3-2: Average Power vs. Time setup parameters . . . . . . . . . . . . . . . . . . . . . 3-3

Table 3-3: Average Power vs. Time measurements . . . . . . . . . . . . . . . . . . . . . . . . 3-4

Table 3-4: Power vs. SC_No parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5

Table 3-5: Setup parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-8

Table 3-6: View menu setup parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-10

Table 3-7: Segment Constellation setup parameters . . . . . . . . . . . . . . . . . . . . . . 3-11

Table 3-8: Average EVM vs. Time setup parameters . . . . . . . . . . . . . . . . . . . . . 3-12

Table 3-9: Average EVM vs. Time measurements . . . . . . . . . . . . . . . . . . . . . . . . 3-12

Table 3-10: EVM vs. SC_No measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-14

Table 3-11: EVM allowable value for IEEE802.11a . . . . . . . . . . . . . . . . . . . . . . 3-14

Table 3-12: Average MagErr vs. Time setup parameters . . . . . . . . . . . . . . . . . . 3-16

Table 3-13: Average MagErr vs. Time measurements . . . . . . . . . . . . . . . . . . . . 3-17

Table 3-14: Average PhaseErr vs. Time setup parameters . . . . . . . . . . . . . . . . . 3-20

Table 3-15: Average PhaseErr vs. Time measurements . . . . . . . . . . . . . . . . . . . 3-21

Table 3-16: Center frequency error measurements . . . . . . . . . . . . . . . . . . . . . . . 3-24

Table 3-17: Symbol Table parameter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-27

Table 3-18: Menu bar setup parameters for Symbol Table . . . . . . . . . . . . . . . . 3-27

WCA11G IEEE802.11a/b/g User Manual v

List of Tables

vi WCA11G IEEE802.11a/b/g User Manual

Preface

Manual Structure

This manual provides user information about the WCA11G IEEE802.11a/b/g
Signal Analysis Software.

The manual contains the following sections:

Getting Started describes the product overview, system configuration, and
installation procedures of the WCA11G IEEE802.11a/b/g Signal Analysis
Software.

Operating Basics describes the software screen elements and provides basic
operating information about the WCA11G software interface.

Reference provides in-depth descriptions of the WCA11G view formats for the
following two analyses:

 Modulation Analysis such as Spectral Power, Constellation, EVM, Symbol

Table, and Center Frequency Error.

 Power Analysis such as Spectrum Mask and Transmit Power On/Off.

Related Manual and Online Document

The following additional manuals are available for the WCA11G IEEE802.11a/b/g
Signal Analysis Software:

The WCA330 & WCA380 Wireless Communication Analyzer User Manual
(Tektronix part number 070-A792-XX) describes how to use the WCA330 and
WCA380.

The WCA330 & WCA380 Wireless Communication Analyzer Programmer Manual
(Tektronix part number 070-A794-XX) provides complete information on
programming and remote control of the instrument through the GPIB/Ethernet
interfaces.

The WCA11G Help system provides online user manual. The online user manual
is integrated with the user interface application. The online user manual is
preconfigured in the WCA11G software.

WCA11G IEEE802.11a/b/g User Manual vii

Preface

Contacting Tektronix

Phone [phone]*

Address Tektronix, Inc.

Web site www.tektronix.com

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

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

Technical support E-mail: [e-mail]

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

1-800-833-9200, select option 3*

6:00 a.m. - 5:00 p.m. Pacific time

*

This phone number is toll free in North America. After office hours, please leave a voice
mail message.
Outside North America, contact a Tektronix sales office or distributor; see the Tektronix web
site for a list of offices.

viii WCA11G IEEE802.11a/b/g User Manual

Glossary of Acronyms

8PSK

8 Phase Shift Keying

16QAM

16 Quardrature Amplitude Modulation

64QAM

64 Quardrature Amplitude Modulation

AP

Access Point

BPSK

Binary Phase Shift Keying

CCK

Complementary Code Keying

Preface

DSSS

Direct Sequence Spread Spectrum

EVM

Error Vector Magnitude

IEEE

Institute of Electrical and Electronic Engineers

LAN

Local Area Network

MT

Mobile Terminal

OFDM

Orthogonal Frequency Division Multiplexing

PBCC

Packet Binary Convolutional Coding

PLCP

Physical Layer Convergence Protocol

QPSK

Quardrature Phase Shift Keying

WCA

Wireless Communication Analyzer

WCA11G IEEE802.11a/b/g User Manual ix

Preface

x WCA11G IEEE802.11a/b/g User Manual

Getting Started

This section provides the following information:

 Product overview

 Hardware configuration

 Accessories

 Installation

 System settings

Product Overview

The WCA11G is an IEEE802.11a/b/g signal analysis software that performs a
signal analysis of 5 GHz band high-speed wireless LAN transmitters (IEEE802.11a
standard) and 2.4 GHz band high-speed wireless LAN transmitters (IEEE802.11b
and IEEE802.11g standards).

You can configure an analysis system for the IEEE802.11a/b/g LAN transmitters
by using the WCA11G software in combination with the WCA330/WCA380
Wireless Communication Analyzers. This system provides OFDM/DSSS
modulation signal spectrum power analysis, constellation display, modulation
accuracy measurement (EVM), a symbol table, center frequency deviation
measurement, and spectrum mask.

Table 1-1 shows all the measurement items available in the WCA11G
IEEE802.11a/b/g Signal Analysis Software and the supported standards.

Table 1-1: WCA11G measurement items

Items Page 802.11a 802.11b 802.11g
Modulation Analysis (OFDM)

Power vs. All Time 3-2 x
Average Power vs. Time 3-3 x x
Power Analysis Display 3-4 x
Power vs. SC_No 3-5 x
Flatness 3-7 x x
Constellation Analysis Display 3-7 x
Constellation/Symbol Constellation 3-8 x
Average EVM vs. Time 3-12 x x
EVM Analysis Display 3-13 x
EVM vs. SC_No 3-13 x
Average MagErr vs. Time 3-16 x x

WCA11G IEEE802.11a/b/g User Manual 1-1

Getting Started

Table 1-1: WCA11G measurement items (cont.)

Items Page 802.11a 802.11b 802.11g

MagErr Analysis Display 3-17 x
MagErr vs. SC_No 3-18 x
Average PhaseErr vs. Time 3-20 x x
PhaseErr Analysis Display 3-21 x
PhaseErr vs. SC_No 3-22 x
Center Frequency Error 3-24 x x
OFDM Linearity 3-25 x x
Symbol Table 3-26 x x

Modulation Analysis (DSSS/CCK/PBCC)

Power vs. All Time 3-2 x x
Average Power vs. Time 3-3 x x
Power Analysis Display 3-4 x
Power vs. Time 3-6 x
Constellation Analysis Display 3-7 x
Constellation/Segment Constellation 3-11 x
Average EVM vs. Time 3-12 x x
EVM Analysis Display 3-13 x
EVM vs. Time 3-15 x
Average MagErr vs. Time 3-16 x x
MagErr Analysis Display 3-17 x
MagErr vs. Time 3-19 x
Average PhaseErr vs. Time 3-20 x x
PhaseErr Analysis Display 3-21 x
PhaseErr vs. Time 3-23 x
Center Frequency Error 3-24 x x
Symbol Table 3-26 x x

Power Analysis

Spectrum Mask (OFDM) 3-29 x x
Spectrum Mask (DSSS) 3-31 x x
Transmit Power On 3-32 x x
Transmit Power Off 3-33 x x

1-2 WCA11G IEEE802.11a/b/g User Manual

Getting Started

IEEE802.11a

Measurements

Table 1-2 shows the measurement items that are required for the IEEE802.11a
standard.

Table 1-2: Measurements for IEEE802.11a signals

Item Description Page

Power vs. All Time Displays power in a line graph. The vertical axis

represents power [dBm], and the horizontal axis
represents time [ms]. This graph is displayed only in Main
View. The analysis of the area between D_Marker 1 and
D_Marker 2 is interlocked with other Views [View 1, View
2, or View 3]. The Main View always displays Power vs. All
Time.

Average Power vs. Time Displays power of one or all subcarriers in a line graph.

The vertical axis represents power [dBm], and the
horizontal axis represents time [ms].

Power vs. SC_No Displays each subcarrier wave power as a symbol in a bar

graph. The vertical axis represents power [dBm], and the
horizontal axis represents subcarrier wave number [-26 to
+26]

.

Flatness Displays each subcarrier wave flatness in a bar graph.

The vertical axis represents average energy deviation
power [dB], and the horizontal axis represents subcarrier
wave number [-26 to +26]

Constellation Displays constellation of one or all subcarriers in a

rectangular coordinates graph. The vertical axis
represents Q, and the horizontal axis represents I.

Symbol Constellation Displays constellation as a symbol in a rectangular

coordinates graph. The vertical axis represents Q, and the
horizontal axis represents I.

Average EVM vs. Time Displays EVM of one or all subcarriers in a line graph. The

vertical axis represents EVM [%], and the horizontal axis
represents time [ms].

EVM vs. SC_No Displays EVM as a symbol in a bar graph. The vertical axis

represents EVM [%], and the horizontal axis represents
subcarrier wave number [-26 to +26]

Average MagErr vs. Time Displays magnitude error of one or all subcarriers in a line

graph. The vertical axis represents magnitude error [%],
and the horizontal axis represents time [ms].

MagErr vs. SC_No Displays magnitude error as a symbol in a bar graph. The

vertical axis represents magnitude error [%], and the
horizontal axis represents subcarrier number [-26 to +26]

Average PhaseErr vs. Time Displays phase error of one or all subcarriers in a line

graph. The vertical axis represents phase error [Degree],
and the horizontal axis represents time [ms].

PhaseErr vs. SC_No Displays phase error as a symbol in a bar graph. The

vertical axis represents phase error [Degree], and the
horizontal axis represents subcarrier number [-26 to +26].

Center Frequency Error Displays carrier wave frequency deviation as a symbol in

a line graph. The vertical axis represents deviation [kHz],
and the horizontal axis represents time [ms].

.

.

3-2

3-3

3-5

3-7

3-8

3-12

3-13

3-16

3-18

.

3-20

3-22

3-24

WCA11G IEEE802.11a/b/g User Manual 1-3

Getting Started

Table 1-2: Measurements for IEEE802.11a signals (cont.)

Item Description Page

OFDM Linearity Displays linearity of OFDM modulation in a line graph. The

vertical axis represents actual measurement values [mW],
and the horizontal axis represents ideal values [mW].

Symbol Table Displays a table of symbol values (hexadecimal and

binary).

Spectrum Mask Displays spectrum waveform and mask in a line graph

under PeakHold condition. The vertical axis represents
power [dBm], and the horizontal axis represents frequency
[Hz].

3-25

3-26

3-29

IEEE802.11b

Measurements

Table 1-3 shows the measurement items that are required for IEEE802.11b
standard.

Table 1-3: Measurements for IEEE802.11b signals

Item Description Page

Power vs. All Time Refer to Table 1-2 on page 1-3. 3-2
Average Power vs. Time Displays power of carriers in a line graph. The vertical axis

represents power [dBm], and the horizontal axis
represents time [ms].

Power vs. Time Displays power of carriers by segment in a bar graph. The

vertical axis represents power [dBm], and the horizontal
axis represents time [ms].

Constellation Displays constellation of carriers in a rectangular

coordinates graph. The vertical axis represents Q, and the
horizontal axis represents I.

Segment Constellation Displays constellation of carriers by segment in a

rectangular coordinates graph. The vertical axis
represents Q, and the horizontal axis represents I.

Average EVM vs. Time Displays EVM of carriers in a line graph. The vertical axis

represents EVM [%], and the horizontal axis represents
time [ms].

EVM vs. Time Displays EVM of carriers by segment in a bar graph. The

vertical axis represents EVM [%], and the horizontal axis
represents time [ms].

Average MagErr vs. Time Displays magnitude error of carriers in a line graph. The

vertical axis represents magnitude error [%], and the
horizontal axis represents time [ms].

MagErr vs. Time Displays magnitude error of carriers by segment in a bar

graph. The vertical axis represents magnitude error [%],
and the horizontal axis represents time [ms].

Average PhaseErr vs. Time Displays phase error of carriers in a line graph. The

vertical axis represents phase error [Degree], and the
horizontal axis represents time [ms].

PhaseErr vs. Time Displays phase error of carriers by segment in a bar graph.

The vertical axis represents phase error [Degree], and the
horizontal axis represents time [ms].

3-3

3-6

3-11

3-12

3-15

3-16

3-19

3-20

3-23

1-4 WCA11G IEEE802.11a/b/g User Manual

Getting Started

Table 1-3: Measurements for IEEE802.11b signals (cont.)

Item Description Page

Center Frequency Error Displays carrier wave frequency deviation in a line graph.

The vertical axis represents deviation [kHz], and the
horizontal axis represents time [ms].

Symbol Table Displays a table of symbol values (hexadecimal and

binary).

Spectrum Mask Displays spectrum waveform and mask in a line graph

under PeakHold condition. The vertical axis represents
power [dBm], and the horizontal axis represents frequency
[Hz].

Transmit Power On Displays the transmit power on ramp in a line graph. The

vertical axis represents power [W], and the horizontal axis
represents time [s].

Transmit Power Off Displays the transmit power down ramp in a line graph.

The vertical axis represents power [W], and the horizontal
axis represents time [s].

3-24

3-26

3-31

3-32

3-33

IEEE802.11g

Measurements

Table 1-4 shows the measurement items that are required for IEEE802.11g
standard.

Table 1-4: Measurements for IEEE802.11g signals

Item Description Page

Power vs. All Time Refer to Table 1-2 on page 1-3. 3-2
Average Power vs. Time Displays power of carriers, or one or all subcarriers in a

line graph. The vertical axis represents power [dBm], and
the horizontal axis represents time [ms].

Power Analysis Display Displays each subcarrier wave power as an OFDM

symbol, or power by segment in a bar graph. The vertical
axis represents power [dBm], and the horizontal axis
represents subcarrier wave number [-26 to +26] or time
[ms]

.

Flatness Displays each subcarrier wave flatness in a bar graph.

The vertical axis represents average energy deviation
power [dB], and the horizontal axis represents subcarrier
wave number [-26 to +26]

Constellation Analysis
Display

Constellation Displays constellation in a rectangular coordinates graph.

Average EVM vs. Time Displays EVM of carriers, or one or all subcarriers in a line

Displays constellation of each subcarrier as an OFDM
symbol, or constellation by segment in a rectangular
coordinates graph. The vertical axis represents Q, and the
horizontal axis represents I.

The vertical axis represents Q, and the horizontal axis
represents I.

graph. The vertical axis represents EVM [%], and the
horizontal axis represents time [ms].

.

3-3

3-4

3-7

3-7

3-8,
3-11

3-12

WCA11G IEEE802.11a/b/g User Manual 1-5

Getting Started

Table 1-4: Measurements for IEEE802.11g signals (cont.)

Item Description Page

EVM Analysis Display Displays EVM as an OFDM symbol, or EVM by segment

in a bar graph. The vertical axis represents EVM [%], and
the horizontal axis represents subcarrier wave number
[-26 to +26] or time [ms]

Average MagErr vs. Time Displays magnitude error of carriers, or one or all

subcarriers in a line graph. The vertical axis represents
magnitude error [%], and the horizontal axis represents
time [ms].

MagErr Analysis Display Displays magnitude error as an OFDM symbol, or

magnitude error by segment in a bar graph. The vertical
axis represents magnitude error [%], and the horizontal
axis represents subcarrier number [-26 to +26] or time
[ms]

.

Average PhaseErr vs. Time Displays phase error of carriers, or one or all subcarriers

in a line graph. The vertical axis represents phase error
[Degree], and the horizontal axis represents time [ms].

PhaseErr Analysis Display Displays phase error as an OFDM symbol, or phase error

by segment in a bar graph. The vertical axis represents
phase error [Degree], and the horizontal axis represents
subcarrier number [-26 to +26] or time [ms]

Center Frequency Error Displays carrier wave frequency deviation as an OFDM

symbol in a line graph. The vertical axis represents
deviation [kHz], and the horizontal axis represents time
[ms].

Symbol Table Displays a table of symbol values (hexadecimal and

binary).

OFDM Linearity Displays linearity of OFDM modulation in a line graph. The

vertical axis represents actual measurement values [mW],
and the horizontal axis represents ideal values [mW].

Spectrum Mask Displays spectrum waveform and mask in a line graph

under PeakHold condition. The vertical axis represents
power [dBm], and the horizontal axis represents frequency
[Hz].

Transmit Power On Displays the transmit power on ramp in a line graph. The

vertical axis represents power [W], and the horizontal axis
represents time [s].

Transmit Power Off Displays the transmit power down ramp in a line graph.

The vertical axis represents power [W], and the horizontal
axis represents time [s].

.

.

3-13

3-16

3-17

3-20

3-21

3-24

3-26

3-25

3-29,
3-31

3-32

3-33

1-6 WCA11G IEEE802.11a/b/g User Manual

Hardware Configuration

Figure 1-1 shows the hardware configuration of an IEEE802.11a/b/g signal
analysis system with the combination of the WCA11G software and the
WCA330/WCA380 Wireless Communication Analyzer. Table 1-5 lists the
equipment used in the system

High-speed wireless LAN

Getting Started

.

Mobile terminal

WCA330/WCA380

Access point

LAN cross cable

Electric circuit

PC

Figure 1-1: WCA11G signal analysis system hardware configuration

Table 1-5: Equipment used in the WCA11G signal analysis system

Items Type Quantity Note

Wireless Communication Analyzer WCA330/

WCA380

LAN cross cable 1

2.4 GHz and 5.2 GHz Bandwidth Antenna 1 Prepare separately

1

Difference between

WCA330 and WCA380

The WCA330 and WCA380 Wireless Communication Analyzers have the same
functions except for their measurement frequency ranges:

Analyzers

 WCA330: DC to 3 GHz

 WCA380: DC to 8 GHz

The descriptions in this manual apply to both the WCA330 and the WCA380
analyzers, unless otherwise noted. The word "analyzer" refers to both products.

WCA11G IEEE802.11a/b/g User Manual 1-7

Getting Started

Accessories

Installation

The following accessories are shipped with the WCA11G IEEE802.11a/b/g Signal
Analysis Software:

 User manual, Tektronix part number 071-1365-XX

 LAN cross cable (3 m), 012-A228-00

This subsection contains instructions for installing the WCA11G software on your
PC and provides information about the created folders.

PC System Requirements

Installation Instructions

Your PC requires the following minimum system requirements to install and
operate the WCA11G software:

 OS: Microsoft Windows 98SE / Windows 2000 / Windows XP

 CPU: Pentium III Processor, at least 866 MHz

 RAM: At least 512 MB

 HDD: At least 100 MB available memory

 Display resolution: At least 1280 x 1024

 Network card: Ethernet card of 10BASE-T or 100BASE-T

The following installation instructions require that you are familiar with the basics
of using the MS Windows operating system. If necessary, read your MS Windows
user documentation before installing the WCA11G software.

Perform the following procedure to install the WCA11G software:

1. Be sure that your PC meets the requirements listed under PC System
Requirements on page 1-8 before proceeding with the installation.

2. Insert the WCA11G IEEE802.11a/b/g Signal Analysis Software CD-ROM
into a CD-ROM drive on your PC.

3. Double-click the My computer icon.

4. Double-click the D: drive icon (substitute your CD-ROM drive letter if it is

different from D). The PC will display the contents of the WCA11G Signal
Analysis Software CD-ROM.

5. Open the DISK1 folder.

1-8 WCA11G IEEE802.11a/b/g User Manual

Getting Started

6. Double-click Setup.exe in the folder.

This copies initial files of the WCA11G software. For a while, the Welcome
window appears on the PC desktop. Follow the on-screen instructions.

7. If the installation completes successfully, the Setup Complete window appears.

Click the Finish button.

Created Folders

When the installation completes properly, the following folders are created:

C:\Program Files\Tektronix\WCA11g. This folder contains the WCA11g.exe
program and other related files. The related files include the parameters required
for communication and analysis. Do not delete or change the files.

C:\Program Files\Tektronix\WCA11g\CWX. This folder contains the graphic display
formats. Do not delete or change the files.

C:\Program Files\Tektronix\WCA11g\ShareFolder\CFG. This folder contains the
WCA330/WCA380 configuration files and trigger files. The analyzer refers to
these setting files. Since the remote controlled analyzer directly accesses these
files, the CFG folder must be shared.

C:\Program Files\Tektronix\WCA11g\ShareFolder\Data. This folder contains the
measurement result files of the WCA11G software.

C:\Program Files\Tektronix\WCA11g\SystemDefault. This folder is used to recall the
factory default settings of the WCA330/WCA380 instruments.

The path names listed above are the examples when you install the WCA11G
software into the C drive.

WCA11G IEEE802.11a/b/g User Manual 1-9

Getting Started

System Settings

This subsection describes the initial settings of your analyzer and your PC. It is
divided into the following three steps:

 Share the folders on your PC, page 1-10

 Configure the network settings of the analyzer, page 1-12

 Configure the network settings of your PC

 MS Windows 98, page 1-17

 MS Windows 2000 or MS Windows XP, page 1-19

NOTE. The following procedure requires that you are familiar with the basics of

using the MS Windows 98/MS Windows 2000/MS Windows XP operating systems.

If necessary, consult the MS Windows documentation.

Sharing the Folders on a

PC

Since the analyzer accesses the setting file in the PC through a network, you must
share the setting files of the PC. Otherwise, an access error will appear on the
analyzer display upon execution. Allow full access to ShareFolder. See Figure 1-2
and Figure 1-3.

1-10 WCA11G IEEE802.11a/b/g User Manual

Getting Started

For a PC running MS Windows 98. In the ShareFolder Properties dialog box, click
Shared As and Full. See Figure 1-2.

Figure 1-2: ShareFolder Properties dialog box (MS Windows 98)

For a PC running MS Windows 2000 or MS Windows XP. In the SharedFolder

Properties dialog box, click Share this folder and Maximum allowed.
See Figure 1-3.

Figure 1-3: ShareFolder Properties dialog box (MS Windows 2000)

WCA11G IEEE802.11a/b/g User Manual 1-11

Getting Started

Setting the Network

Parameters of the Analyzer

Perform the following procedure to set the network parameters of your analyzer:

1. Confirm that your analyzer is not powered on.

2. Connect the keyboard and mouse provided with the analyzer to the keyboard

and mouse connectors on the rear panel of the analyzer.

3. Use a LAN cable to connect the analyzer and a hub.

4. Power on the analyzer.

5. Move the pointer to the bottom of the screen. The Windows 98 taskbar appears.

6. Select Settings > Control Panel from the Start menu. The Control Panel

window appears.

7. Double-click the Network icon in the window. The Network dialog box
appears as shown in Figure 1-4.

Figure 1-4: Network dialog box (Identification tab)

8. Click the Identification tab.

9. Check that WCA380_J300XXX or WCA330_J300XXX (XXX is the specific

serial number of the analyzer) is displayed in the Computer name text box. This
is the default computer name for the analyzer.

10. Check that WORKGROUP is displayed in the Workgroup text box.

1-12 WCA11G IEEE802.11a/b/g User Manual

Getting Started

To Automatically Acquire an IP Address. Do the following steps to connect the
analyzer to a LAN. An IP address must be assigned by the name server. You need
to use the same settings parameters between the analyzer and your PC.

1. Click the Configuration tab in the Network window.

2. In the network component field, click Internet Protocol (TCP/IP).

3. Click the Properties button. The TCP/IP Properties dialog box appears as

shown in Figure 1-5.

Figure 1-5: TCP/IP Properties dialog box

4. Click the IP Address tab, and then select Obtain an IP address

automatically.

5. Click the DNS Configuration tab, and then select Disable DNS.

6. Click the OK button.

WCA11G IEEE802.11a/b/g User Manual 1-13

Getting Started

To Assign IP Address. When the name server is not in the network, perform the
following procedure to set the network parameters:

Figure 1-6: TCP/IP Properties dialog box for address setting

1. If you connect the analyzer directly to a single PC:

a. In the TCP/IP Properties dialog box, select Specify an IP address.

b. Set the IP Address parameter to the same IP address as the PC's address

except for the last number. The last number must be different from the last
number in the PC's IP address.

c. Set the Subnet Mask parameter to the same subnet mask used by the PC.

Do not enter a number if the PC does not have a net mask.

2. If you connect the analyzer to your network:

a. In the TCP/IP Properties dialog box, select Specify an IP address.

b. Ask your local network administrator and enter the appropriate addresses.

CAUTION. To prevent communication conflicts on your network, ask your local

network administrator for the correct numbers to enter in the dialog box.

3. In the TCP/IP Properties dialog box, click the DNS Configuration tab and
then select Disable DNS.

4. Click the OK button.

1-14 WCA11G IEEE802.11a/b/g User Manual

Getting Started

I/O Port and Line Code Settings of the Analyzer. Set the command input/output port
for TCP/IP and new line code for reply message returned via the TCP/IP network.
Do the following steps to set the TCP/IP parameters of the analyzer:

1. Push the WCA330/WCA380 front panel CONFIG: UTILITY button to

display the Utility submenu as shown in Figure 1-7.

2. Click More....

Click

Figure 1-7: CONFIG:UTILITY submenu

3. The Util:More submenu appears as shown in Figure 1-8.

Click Util H [Remote].

Click

Figure 1-8: Util:More: submenu

WCA11G IEEE802.11a/b/g User Manual 1-15

Getting Started

4. Another submenu appears as shown in Figure 1-9. Click TCP/IP....

Click

Figure 1-9: [Util H] Remote submenu

5. The Remote TCP/IP submenu appears as shown in Figure 1-10. Click the
Command Port to set the number to 3066, then click the Event Port to set the
number to 3067, and then click the New Line to set a new line code to CRLF.

Set parameters
as shown.

Figure 1-10: [Util H] Remote TCP/IP submenu

6. Use a LAN cable to connect the analyzer and a hub.

7. When the dialog box displays: "Do you want to reboot?", click Ye s.

8. Push the STANDBY switch to reboot the analyzer.

1-16 WCA11G IEEE802.11a/b/g User Manual

Getting Started

Network Setting of

Windows 98 PC

Perform the following procedures to set the network parameters of your PC. If your
PC is running MS Windows 2000 or MS Windows XP, refer to page 1-19.

Do the following steps to set the network parameters of your PC running MS
Windows 98:

1. Confirm that your PC is connected to a network.

2. Select Settings > Control Panel from the Start menu. The Control Panel

window appears.

3. Double-click the Network icon in the window. The Network dialog box

appears as shown in Figure 1-11.

Figure 1-11: Network dialog box showing Identification tab

4. Click the Identification tab.

5. Enter your PC name (for example, PC123) in the Computer name text box.

6. Enter WORKGROUP in the Workgroup text box.

7. Click the OK button.

WCA11G IEEE802.11a/b/g User Manual 1-17

Getting Started

To Obtain an IP Address Automatically. Do the following steps to connect your PC
to the LAN. An IP address must be assigned by the name server. You need to use
the same settings parameters between the analyzer and your PC.

1. Click the Configuration tab in the Network dialog box.

2. In the network component field, click Internet Protocol (TCP/IP).

3. Click the Properties button. The TCP/IP Properties dialog box appears.

4. Click the IP Address tab, and then select Obtain an IP address
automatically.

5. Click the DNS Configuration tab, and then select Disable DNS.

6. Click the OK button.

To Assign an IP Address. When the name server is not in the network, do the
following steps to set the network parameters:

1. If you connect the PC directly to the analyzer:

a. In the TCP/IP Properties dialog box, select Specify an IP address.

b. Set the IP Address parameter to the same IP address as the analyzer's

address except for the last number. The last number must be different from
the last number in the analyzer's IP address.

c. Set the Subnet Mask parameter to the same subnet mask used by the

analyzer. Do not enter a number if the analyzer does not have a net mask.

2. If you connect your PC to a network:

a. In the TCP/IP Properties dialog box, select Specify an IP address.

b. Ask your local network administrator and enter the appropriate addresses.

CAUTION. To prevent communication conflicts on your network, ask your local

network administrator for the correct numbers to enter in the dialog box.

3. In the TCP/IP Properties dialog box, click the DNS Configuration tab and
then select Disable DNS.

4. Click the OK button.

1-18 WCA11G IEEE802.11a/b/g User Manual

Getting Started

Network Setting of a PC

Running Windows 2000 or

Windows XP

Perform the following procedure to set the network parameters of the PC running
MS Window 2000. For a PC running Windows XP, refer to the Windows
documentation.

1. Confirm that your PC is connected to a network.

2. Select Settings > Control Panel from the Start menu. The Control Panel

window appears.

3. Double-click the System icon in the window.

4. On the Network Identification tab, click Properties. The Identification

Changes dialog box appears as shown Figure 1-12.

Figure 1-12: Identification Changes dialog box

5. Enter your PC name (for example, PC 123) in the Computer name text box.

6. Enter WORKGROUP in the Workgroup text box.

WCA11G IEEE802.11a/b/g User Manual 1-19

Getting Started

To Obtain an IP Address Automatically. Do the following steps to connect your PC
to the LAN. An IP address must be assigned by the name server. You need to use
the same settings parameters for both the analyzer and your PC.

1. Double-click the Network and Dial-up Connections icon in the Control
Panel window. The Network and Dial-up Connections window appears.

2. Double-click the Local Area Connection icon. The Local Area Connection
Properties dialog box appears.

3. Click the Properties button. The Local Area Connection Properties dialog box
appears.

4. In the network component field, select Internet Protocol (TCP/IP) and then
click the Properties button to display the dialog box shown below.

Figure 1-13: Internet Protocol (TCP/IP) Properties dialog box

5. In the dialog box, select Obtain an IP address automatically and Obtain
DNS server address automatically.

6. Click the OK button.

1-20 WCA11G IEEE802.11a/b/g User Manual

Getting Started

To Assign an IP Address. When the name server is not in the network, do the
following steps to set the network parameters:

1. Repeat the same steps described on page 1-20 to display the Internet Protocol

(TCP/IP) Properties dialog box.

Figure 1-14: Internet Protocol (TCP/IP) Properties for IP Address Assignment

2. If you connect the PC directly to the analyzer:

a. In the Internet Protocol (TCP/IP) Properties dialog box, select Use the

following IP address and Use the following DNS server address.

b. Set the IP address parameter to be the same IP address as the analyzer's

address except for the last number. The last number must be different from
the last number in the analyzer's IP address.

c. Set the Subnet mask parameter to be the same subnet mask used by the

analyzer. Do not enter a number if the analyzer does not have a net mask.

3. If you connect the PC to your network:

a. In the dialog box, select Use the following IP address.

b. Ask your local network administrator and enter the appropriate addresses.

CAUTION. To prevent communication conflicts on your network, ask your local

network administrator for the correct numbers to enter in the dialog box.

WCA11G IEEE802.11a/b/g User Manual 1-21

Getting Started

Registering a User Name

for MS Windows 2000 or

MS Windows XP

You need to register a PC running MS Windows 2000 or MS Windows XP and the
analyzer with the same user name (for example, test). Without the settings, you
cannot access the PC because of the security features of MS Windows 2000 or MS
Windows XP. If your PC is running on MS Windows 98, ignore this section.

Registering a User Name on the PC running MS Windows 2000. Do the following
steps to set a user name for the PC.

For a PC running Windows XP, refer to the Windows documentation.

NOTE. Communication between the analyzer and PC may not be performed

properly when you log on to the network with a different user name from that used
to register with MS Windows 2000 or MS Windows XP.

1. Confirm that your PC is connected to a network.

2. Click the icon on the Control Panel to open the Users and Passwords

dialog box.

1-22 WCA11G IEEE802.11a/b/g User Manual

Getting Started

3. Click the Add... button on the Users tab. The Add New User dialog box

appears.

4. In the User name text box, enter test.

5. Click the Next> button to proceed to the next dialog box.

6. Click the Next> button without entering a password to proceed to the next

dialog box.

7. Select Power Users from the list box at the right side of the Other option

button.

WCA11G IEEE802.11a/b/g User Manual 1-23

Getting Started

8. Click the Finish button, and make sure that test is displayed on the Users and
Passwords dialog box.

9. Clear the Users must enter a user name and password to use this computer
check box.

10. Click the OK button to complete the settings for the PC.

1-24 WCA11G IEEE802.11a/b/g User Manual

Getting Started

Registering a User Name for the Analyzer. Do the following steps to set up a user
name for the WCA330/WCA380 analyzer:

1. Select Start > Settings > Control Panel from the Start menu. The Control

Panel window appears.

2. Click the icon on the Control Panel. The User Settings dialog box

appears.

3. Click the New User... button in the dialog box. The Add User dialog box

appears.

4. Enter test in the User name text box, and click the Next> button. The Enter

New Password dialog box appears.

WCA11G IEEE802.11a/b/g User Manual 1-25

Getting Started

5. Click the Next> button without entering a password in the Password text box.
The Personalized Items Settings dialog box appears.

6. In the dialog box, select Create copies of the current items and their
content, and click the Next> button. The Ready to Finish dialog box appears.

7. Confirm the messages in the dialog box, and click the Finish button.

8. Click the icon in the Control Panel again to check that the user is added

to the User List.

1-26 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

This section describes the basic operation of the WCA11G IEEE802.11a/b/g
Signal Analysis Software.

Screen Elements

Figure 2-1 shows the screen elements of the WCA11G software. The operation
screen consists of four domains: Menu Bar on page 2-2, Analysis Type buttons on
page 2-5, Graph Frame on page 2-5, and Analysis Setting window on page 2-6.

Menu bar

Analysis Type buttons

Graph Frame Analysis Setting window

Figure 2-1: Screen elements

WCA11G IEEE802.11a/b/g User Manual 2-1

Operating Basics

Menu Bar

A menu bar appears at the top of the screen. Table 2-1 shows the list of Menu Bar
items.

Table 2-1: Menu Bar Items

Main Sub Function

File (F) Select

Source(S)

Result File(R) Save(S)... Opens save/recall dialog box, where you

Setting File(I) Save(S)... Opens save/recall dialog box, where you

Save Symbol Table(T)... Saves symbol table as text file. (Binary or

Exit(E) Exits from WCA11G software.

View (V) PlotClear(P) Clears displays in the Graph frame.

WCA(W)... Opens Read From WCA dialog box,

where you can set WCA300 series
analysis parameters. See Figure 2-4 on
page 2-8.

IQT(I)... Opens Read From WCA dialog box,

where you can specify the files to be
analyzed (IQT files). See Figure 2-5 on
page 2-12.

can save the analysis result.

Recall(R)... Opens save/recall dialog box, where you

can recall the analysis result file.

can customize the default view format and
save it as a customized setting file.

Recall(R)... Opens save/recall dialog box, where you

can recall the customized view format.

Hexadecimal format can be selected.)

Main (M)
View1 (1)
View2 (2)
View3 (3)

Pan(P) Moves the display area by dragging on

the screen. Zoom function and Pan are
exclusive.

Zoom(Z) Magnifies the display area on the screen.

Zoom function and Pan are exclusive.

1

1

View Reset(V) Resets Zoom and Pan scale;

automatically optimizes the scale of the
graph display.

M_Marker1(1) Check this menu to display the readings

of M_Marker1 on each View screen.

M_Marker2(2) Check this menu to display the readings

of M_Marker2 on each View screen.

1

2,3

2,3

M_Marker Reset(M) Check this menu to reset the positions of

M_Marker1 and M_Marker2. The two
markers return to their initial positions.
Available when you use M_Marker1 or
M_Marker2.

3

Despread or FFT

On(N) Displays pre-analysis data of

modulation.

Off(F) Displays post-analysis data of

modulation.

3,4

3,4

2-2 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Table 2-1: Menu Bar Items (cont.)

Main Sub Function

Normalization(N)

On(N) Applies normalization to the constellation

Off(F) Excludes normalization from the

Normalization Factor
(F)

AUTO (A)
BPSK (B)
QPSK (Q)
8PSK (8)
16QAM (1)
64QAM (6)

Vector(L)

On(N) Activates vector between symbols in the

Off(F) Inactivates vector between symbols in the

Symbol Table(T)

Hex(H) Displays symbol table values as

Bin(B) Displays symbol table values as binary.

Select View(S) Specifies View1, View2, View3, or Main

Main View (M)
View1 (1)
View2 (2)
View3 (3)

Tool (T) WCA300 Factory Reset(W)... Resets WCA300 series instrument to the

Ethernet Setup(E)... Opens Ethernet Setup dialog box.

Folder Setup(F)... Opens Folder Setup dialog box.

Set Default(D) Restore the setting file (*.ini) to the initial

Help (H) Help (H)... Opens WCA11G Help system.

3

display.

constellation display.

3

In the constellation display, you can select
the modulation format for normalization.
These buttons are exclusive.

constellation display.

constellation display.

hexadecimal.

3

3

3

3

View.

factory shipping conditions.

See Figure 2-2.

See Figure 2-3.

conditions.

3

Version Information(V)... Displays version information of WCA11G

software.

1. Pan, Zoom, and View Reset are not available when you select Symbol Table.

WCA11G IEEE802.11a/b/g User Manual 2-3

Operating Basics

2. M_Marker1 and M_Marker2 are exclusive. You cannot use M_Marker1 or M_Marker2 when you specify

one of the following formats for a View screen:
Constellation
Symbol Constellation
Segment Constellation
Constellation Analysis Display
Symbol Table

3. This submenu is not available when you select Main View.

4. You cannot use Despread or FFT when you specify one of the following formats for a View screen:

Constellation
Symbol Constellation
Segment Constellation
Constellation Analysis Display
Flatness
Center Frequency Error
OFDM Linearity
Symbol Table
Spectrum Mask
Transmit Power On
Transmit Power Off

Ethernet Setup dialog box. When you select Ethernet Setup (E) in the Tool (T)

menu, the Ethernet Setup dialog box appears.

Figure 2-2: Ethernet Setup dialog box

In this dialog box, you can set the Ethernet connection parameters as follows:

 Computer: Enter the Computer Name that you used in step 9 on page 1-12.

 Command Port: Displays the TCP/IP command port number.

 Event port: Displays the TCP/IP event port number.

2-4 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Folder Setup dialog box. When you select Folder Setup (D) in the Tool (T) menu,
the Folder Setup dialog box appears.

Figure 2-3: Folder Setup dialog box

 Data Folder: Displays the path name of the sharing folder DATA.

 CFG Folder: Displays the path name of the sharing folder CFG.

Analysis Type buttons

Graph Frame

You can start the measurement by selecting the Analysis Type buttons located at
the upper right of the screen. By clicking these buttons, you can toggle the
parameter setting window. Two types of analysis buttons are provided as shown
below:

MODULATION button. Click this button to activate the modulation analysis setting
window. In this setting window, you can set the various parameters such as the
WCA300 control parameters and the analysis processing parameters, or you can
change the analyzed graph display.

POWER button. Click this button to activate the power analysis setting window. In
this setting window, you can set the WCA300 control parameters, or you can
change the analyzed graph display.

Displays the analysis and measurement results in this area. For details on the
modulation analysis view formats, refer to page 3-2. For the power analysis view
formats, refer to page 3-29.

WCA11G IEEE802.11a/b/g User Manual 2-5

Operating Basics

Modulation Analysis

Setting Window

The setting window for the modulation analysis allows you to set the following
menus:

 SETUP menu, page 2-6

 VIEW menu, page 2-13

Table 2-2 lists the modulation analysis SETUP menu. The SETUP parameters
become available when you push the START button to start the analysis.

The SETUP parameters for currently displayed data are displayed in the RESULT
INFORMATION field.

Table 2-2: Modulation Analysis SETUP Parameters

Menu item Option Description

Standard Selects the wireless LAN standard type.

IEEE802.11a Analyzes IEEE802.11a modulation.
IEEE802.11b Analyzes IEEE802.11b modulation.
IEEE802.11g Analyzes IEEE802.11g modulation.

Modulation Type See Table 2-3. Selects the modulation type (data transmission rate)

from the pull-down menu.

Long Training Symbol
Synchronization

Equalization Check this box to apply the data correction to long

SELECT SOURCE Selects the analysis method.

WCA Check this radio button to set up the WCA300 series

IQT Check this radio button to select the IQT files. Select

SETUP... Click this button to open Read From WCA dialog box.

START Click to start the analysis.

CANCEL Click to stop the analysis.

Check this box to apply the synchronization function
to long training symbol during the analysis.

training symbol during the analysis.

parameters. Select WCA and then click the SETUP...
button to open Read From WCA dialog box. This
dialog box enables you to set the analyzer
parameters, acquire the data (IQT files), and create a
graphical display. See Figure 2-4 on page 2-8.

IQT and then click the SETUP... button to open Read
From WCA dialog box, where you can perform the
analysis and create a graphical display from IQT files.
See Figure 2-5 on page 2-12.

After specifying the analysis method from the

SELECT SOURCE menu, you can use this button.

2-6 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Table 2-3 shows the modulation type for the IEEE802.11a/b/g standards. You must
specify the modulation type before you start an analysis.

Table 2-3: Modulation types

Standard Modulation Type Data Rate Modulation First/Second Encoding Rate Note

IEEE802.11a

IEEE802.11b

IEEE802.11g DSSS.DBPSK (1 Mbps) 1 Mbps DBPSK/ERP_DSSS LongPLCP

OFDM.BPSK (6 Mbps) 6 Mbps BPSK/OFDM 1/2
OFDM.BPSK (9 Mbps) 9 Mbps BPSK/OFDM 3/4
OFDM.QPSK (12 Mbps) 12 Mbps QPSK/OFDM 1/2
OFDM.QPSK (18 Mbps) 18 Mbps QPSK/OFDM 3/4
OFDM.16QAM (24 Mbps) 24 Mbps 16QAM/OFDM 1/2
OFDM.16QAM (36 Mbps) 36 Mbps 16QAM/OFDM 3/4
OFDM.64QAM (48 Mbps) 48 Mbps 64QAM/OFDM 2/3
OFDM.64QAM (54 Mbps) 54 Mbps 64QAM/OFDM 3/4
AUTO Auto Auto
DSSS.DBPSK (1 Mbps) 1 Mbps DBPSK/DSSS LongPLCP

DSSS.DQPSK (2 Mbps) 2 Mbps DQPSK/DSSS

CCK (5.5 Mbps) 5.5 Mbps CCK

CCK (11 Mbps) 11 Mbps CCK

PBCC.BPSK (5.5 Mbps) 5.5 Mbps BPSK/PBCC

PBCC.QPSK (11 Mbps) 11 Mbps QPSK/PBCC

AUTO Auto Auto

DSSS.DQPSK (2 Mbps) 2 Mbps DQPSK/ERP_DSSS
CCK (5.5 Mbps) 5.5 Mbps CCK
CCK (11 Mbps) 11 Mbps CCK
PBCC.BPSK (5.5 Mbps) 5.5 Mbps BPSK/ERP_PBCC
PBCC.QPSK (11 Mbps) 11 Mbps QPSK/ERP_PBCC
PBCC.8PSK (22 Mbps) 22 Mbps 8PSK/ER_PBCC
PBCC.8PSK (33 Mbps) 33 Mbps 8PSK/ER_PBCC
OFDM.BPSK (6 Mbps) 6 Mbps BPSK/DSSS_OFDM 1/2
OFDM.BPSK (9 Mbps) 9 Mbps BPSK/DSSS_OFDM 3/4
OFDM.QPSK (12 Mbps) 12 Mbps BPSK/DSSS_OFDM 1/2
OFDM.QPSK (18 Mbps) 18 Mbps BPSK/DSSS_OFDM 3/4
OFDM.16QAM (24 Mbps) 24 Mbps 16QAM/DSSS_OFDM 1/2
OFDM.16QAM (36 Mbps) 36 Mbps 16QAM/DSSS_OFDM 3/4
OFDM.64QAM (48 Mbps) 48 Mbps 64QAM/DSSS_OFDM 2/3
OFDM.64QAM (54 Mbps) 54 Mbps 64QAM/DSSS_OFDM 3/4
AUTO Auto Auto

LongPLCP or
ShortPLCP

LongPLCP or
ShortPLCP

WCA11G IEEE802.11a/b/g User Manual 2-7

Operating Basics

Table 2-3: Modulation types (cont.)

Standard Modulation Type Data Rate Modulation First/Second Encoding Rate Note

IEEE802.11g OFDM.BPSK (6 Mbps) 6 Mbps BPSK/ERP_OFDM 1/2

OFDM.BPSK (9 Mbps) 9 Mbps BPSK/ERP_OFDM 3/4
OFDM.QPSK (12 Mbps) 12 Mbps QPSK/ERP_OFDM 1/2
OFDM.QPSK (18 Mbps) 18 Mbps QPSK/ERP_OFDM 3/4
OFDM.16QAM (24 Mbps) 24 Mbps 16QAM/ERP_OFDM 1/2
OFDM.16QAM (36 Mbps) 36 Mbps 16QAM/ERP_OFDM 3/4
OFDM.64QAM (48 Mbps) 48 Mbps 64QAM/ERP_OFDM 2/3
OFDM.64QAM (54 Mbps) 54 Mbps 64QAM/ERP_OFDM 3/4
AUTO Auto Auto

UltraShortPLCP

SELECT SOURCE. The following information describes the details about the
SELECT SOURCE menu on the modulation analysis setting window.

Select the WCA radio button and then click the SETUP... button in the SELECT
SOURCE field to open the Read From WCA dialog box as shown in Figure 2-4. In
this dialog box, you can set the analyzer parameters.

Figure 2-4: Read From WCA dialog box

2-8 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Table 2-4 shows the parameters you can set in the Read From WCA dialog box.

Table 2-4: Read From WCA dialog box parameters

Items Option Description

No Remote Control Click this box to use local settings. It makes

the WCA300s parameters inactive.

This selection is available when you check
the WCA radio button in the SELECT
SOURCE.

WCA300s

Input IQ

RF

Channel Table Selects the channel from the pull-down

Center Frequency Sets the center frequency of the analyzer.

Ref Level 30, 20, 10, 0, -10, -20,

-30, -40, -50

Block Size 2000, 1000, 400, 200,

100, 40, 20, 10, 1

Trigger Mode Manual

ExtTrigger
LevelTrigger

Trigger Position 100, 50, 10, 0 Selects the trigger position of the analyzer.

Trigger Level 30, 20, 10, 0, -10, -20,

-30, -40, -50, -60, -70,

-80, -90, -100, -110,

-120, -130, -140, -150

Trigger Slope Rise

Fall

REPETITIVE
ACQUISITION

FILE

Path File Name field Text input Enters text to specify the file name and

REFER button Opens the dialog box to specify the file

CLOSE Exits the Read From WCA dialog box.

Specifies the input (IQ or RF) for the
analyzer.

menu. See Table 2-5.

Available when you specify VALUE for
Channel Table.

Selects the reference level of the analyzer.

Selects the block size of the analyzer.

Specifies the trigger mode of the analyzer.

Available when the Trigger Mode is set to
either ExtTrigger or LevelTrigger.

Selects the trigger level of the analyzer.
Available when the Trigger Mode is set to
LevelTrigger.

Selects the trigger slope of the
Available when the Trigger Mode is set to
LevelTrigger.

Click this box to perform repetitive
acquisition.

destination.

name.

analyzer.

WCA11G IEEE802.11a/b/g User Manual 2-9

Operating Basics

In the Channel Table, you can select the channel from the following channel list.

Table 2-5: Channel list

Standard Channel number Carrier frequency

[GHz]

IEEE802.11a 34 5.170

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

VALUE Center Frequency Inputs a value for

Note

center frequency.

2-10 WCA11G IEEE802.11a/b/g User Manual

Table 2-5: Channel list (cont.)

Operating Basics

Standard Channel number Carrier frequency

[GHz]

IEEE802.11b
and
IEEE802.11g

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

VALUE Center Frequency Inputs a value for

Note

center frequency.

WCA11G IEEE802.11a/b/g User Manual 2-11

Operating Basics

Select the IQT radio button and then click the SETUP... button in the SELECT
SOURCE field to open the Read From WCA dialog box as shown in Figure 2-5. In
this dialog box, you can specify the files to be analyzed (IQT files).

Figure 2-5: Read From WCA dialog box (IQT file)

Table 2-6 shows the parameters you can set in the Read From WCA dialog box.

Table 2-6: Read From WCA dialog box (IQT) parameters

Items Option Description

No Remote Control Not available when you check the IQT
WCA300s

Input
Channel Table
Center Frequency
Ref Level
Block Size
Trigger Mode
Trigger Position
Trigger Level
Trigger Slope

REPETITIVE
ACQUISITION

FILE

Path File Name field Text input Enters text to specify the file name and

REFER button Opens the dialog box to specify the file

CLOSE Exits the Read From WCA dialog box.

radio button in the SELECT SOURCE.

destination.

name.

2-12 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Table 2-7 lists the VIEW menus of the modulation analysis setting window.

Table 2-7: Modulation Analysis VIEW Parameters

Menu item Option Description

View Style 1 *1 Displays one graph on the screen.

2 * 2 Displays four graphs on the screen.

DISPLAY MOD.
TYPE...

Select Subcarrier Selects subcarrier(s) from the pull-down list for a

Click this button to open DISPLAY MOD. TYPE
dialog box. See Figure 2-6 on page 2-16.

displayed line graph.

All Data
All Pilot
All
Single Subcarrier

Subcarrier # Specifies the subcarrier number from the list.

Symbol or
Segment #

Displays only Data.
Displays only Pilot.
Displays Data + Pilot.
Displays the subcarrier wave specified by
Subcarrier #.

This menu item is available when you specify one of
the following formats for a View screen.

Average Power vs. Time
Average EVM vs. Time
Average MagErr vs. Time
Average PhaseErr vs. Time
Constellation
Center Frequency

[-26 to -1, +1 to +26]

The Subcarrier # is available when you specify
Single Subcarrier for Select Subcarrier.

Specifies the symbol number or segment number.
See page 2-15 for details on segment.

This menu item is available when you specify one of
the following format for a View screen.

Power vs. SC_No
EVM vs. SC_No
MagErr vs. SC_No
PhaseErr vs. SC_No
Symbol Constellation
Power vs. Time
EVM vs. Time
MagErr vs. Time
PhaseErr vs. Time
Segment Constellation
Power Analysis Display
EVM Analysis Display
MagErr Analysis Display
PhaseErr Analysis Display
Constellation Analysis Display

WCA11G IEEE802.11a/b/g User Manual 2-13

Operating Basics

Table 2-7: Modulation Analysis VIEW Parameters (cont.)

Menu item Option Description

RESULT
INFORMATION

Displays the setting parameters when you performed
an analysis for the currently selected signal.

The following parameters are displayed:

IQT File Name
Standard
Modulation Type
Long Training Symbol Synchronization On/Off
Equalization On/Off.

2-14 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Segment and Modulation Analysis. In Modulation Analysis, it is important to
calculate average values of RMS voltage or center frequency error for the enough
length of time in order to get good analysis results. The length of signal to calculate
the RMS voltage or center frequency error is called “segment” in the WCA11G
software. For example, frequency error by the segment is displayed on the Center
Frequency Error view format.

The following view formats display the averaged values by the segment for power,
EVM, magnitude error, and phase error, respectively.

 Average Power vs. Time, page 3-3

 Average EVM vs. Time, page 3-15

 Average MagErr vs. Time, page 3-19

 Average PhaseErr vs. Time, page 3-23

The length of segment is different depending on the modulation type as follows:

 Data part

 OFDM:80 sample points (1 symbol)

 DSSS: 88 chips (8 symbols)

 CCK: 80 chips (10 symbols)

 PBCC: 80 symbols

 Preamble, Header part

 Short OFDM training symbol:16 sample points

 Long OFDM training symbol:160 sample points

 PLCP preamble:1584 chips (144 symbols)

 Short PLCP preamble:792 chips (72 symbols)

 PLCP Header:528 chips (48 symbols)

 Short PLCP Header:264 chips (24 symbols)

The following view formats display the detailed analysis data of power, EVM,
magnitude error, and phase error for each symbol, chip, or subcarrier wave
contained in one segment.

IEEE802.11a IEEE802.11b IEEE802.11g

Power vs. SC_No Power vs. Time Power Analysis Display
EVM vs. SC No EVM vs. Time EVM Analysis Display
MagErr vs. SC_No MagErr vs. Time MagErr Analysis Display
PhaseErr vs. SC_No PhaseErr vs. Time PhaseErr Analysis Display

WCA11G IEEE802.11a/b/g User Manual 2-15

Operating Basics

Display Modulation Type dialog box. Click the DISPLAY MOD. TYPE button on
the setting window to open the Display Modulation Type dialog box as shown in
Figure 2-6, where you can select the modulation type by clicking each desired box.

Only the checked modulation type signals have an effect on the graph display
except for the Main View. Unchecked modulation type signals are ignored.

Figure 2-6: Display Modulation Type dialog box

Do the following steps to use the Display Modulation Type dialog box:

1. Select a standard you want to analyze from the Standard pull-down list on the
SETUP menu in the Modulation Analysis setting window. Refer to page 2-6.

2. Click the DISPLAY MOD. TYPE button on the VIEW menu of the setting

window.

3. Select the desired individual modulation type(s) or select CHECK ALL.

 CHECK ALL: Click this button to check all the boxes.

 CHECK NONE: Click this button to deselect all the boxes.

4. Click the APPLY button to apply the selected type(s) to the measurement data,
and then display the graph for the modulation type(s) specified.

5. Click the CLOSE button to close the dialog box.

2-16 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Power Analysis Setting

Window

The setting window for power analysis allows you to access the SETUP menu.

Table 2-8 lists the power analysis SETUP menus.

Table 2-8: Power Analysis SETUP Parameters

Menu item Option Description

Standard Selects the wireless LAN standard type.

IEEE802.11a Analyzes IEEE802.11a power.
IEEE802.11b Analyzes IEEE802.11b power.

IEEE802.11g Analyzes IEEE802.11g power.
Test See Table 2-9. Selects the test item.
MEASUREMENT Specifies the analysis parameters.

SETUP... Click this button to open the Read From WCA dialog

box, where you can set the analyzer parameters.

START Click to start the analysis.

After specifying the analysis method from the
MEASUREMENT menu, you can use this button.

CANCEL Click to stop the analysis.

Power Analysis Test Items. Table 2-9 lists the power analysis test items.

Table 2-9: Power Analysis Test Items

Standard Test Items Description

IEEE802.11a Spectrum Mask Displays spectrum waveform and mask in a line

graph under PeakHold condition. The vertical axis
represents power [dBm], and the horizontal axis
represents frequency [Hz].

IEEE802.11b
or
IEEE802.11g

Spectrum Mask Displays spectrum waveform and mask in a line

graph under PeakHold condition. The vertical axis
represents power [dBm], and the horizontal axis
represents frequency [Hz].

Transmit Power On Displays the transmit power on ramp in a line graph.

The vertical axis represents power [W], and the
horizontal axis represents time [ms].

Transmit Power Off Displays the transmit power down ramp in a line

graph. The vertical axis represents power [W], and
the horizontal axis represents time [ms].

WCA11G IEEE802.11a/b/g User Manual 2-17

Operating Basics

Graph Window Pane

Analysis and measurement results are displayed as a graph in this area. You can
select either 1 * 1 or 2 * 2 display format by selecting View Style in the SETUP
menu in the modulation analysis setting window. For power analysis, the graph
display is fixed to 1 * 1 format.

Figure 2-7: 1 * 1 screen display

Figure 2-8: 2 * 2 screen display

In the modulation analysis 1 * 1 view style, you can toggle the view screen by
double-clicking on the screen. The screen display changes in the order of Main
View > View 1 > View 2 > View 3 > Main View.

2-18 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

D_Marker1 and D_Marker2. In the Main View screen, D_Marker1 and D_Marker2
are displayed in yellow. You can specify the display range for a View screen by
using these Markers.

These Marker readouts are displayed in the Main View screen:

 Start: Time data of D_Marker1

 Length: D_Marker2 - D_Marker1

 End: Time data of D_Marker2

View Function

You can specify a graphical view format for each of the three View screens from
the pull-down list located at the top of each View screen. See Figure 2-9.

Figure 2-9: View format pull-down list

View Format. Table 2-10 lists the view formats for the IEEE802.11a standard.

Table 2-10: View format - IEEE802.11a signals

Item Description

Average Power vs. Time Displays power of one or all subcarriers in a line graph. The

vertical axis represents power [dBm], and the horizontal axis
represents time [ms].

Power vs. SC_No Displays each subcarrier wave power as a symbol in a bar

graph. The vertical axis represents power [dBm], and the
horizontal axis represents subcarrier wave number [-26 to +26]

Flatness Displays each subcarrier wave flatness in a bar graph. The

vertical axis represents average energy deviation power [dB],
and the horizontal axis represents subcarrier wave number [-26
to +26]

.

Constellation Displays constellation of one or all subcarriers in a rectangular

coordinates graph. The vertical axis represents Q, and the
horizontal axis represents I.

Symbol Constellation Displays constellation as a symbol in a rectangular coordinates

graph. The vertical axis represents Q, and the horizontal axis
represents I.

.

WCA11G IEEE802.11a/b/g User Manual 2-19

Operating Basics

Table 2-10: View format - IEEE802.11a signals (cont.)

Item Description

Average EVM vs. Time Displays EVM of one or all subcarriers in a line graph. The

vertical axis represents EVM [%], and the horizontal axis
represents time [ms].

EVM vs. SC_No Displays EVM as a symbol in a bar graph. The vertical axis

represents EVM [%], and the horizontal axis represents
subcarrier wave number [-26 to +26]

Average MagErr vs. Time Displays magnitude error of one or all subcarriers in a line

graph. The vertical axis represents magnitude error [%], and
the horizontal axis represents time [ms].

MagErr vs. SC_No Displays magnitude error as a symbol in a bar graph. The

vertical axis represents magnitude error [%], and the horizontal
axis represents subcarrier number [-26 to +26]

Average PhaseErr vs. Time Displays phase error of one or all subcarriers in a line graph.

The vertical axis represents phase error [Degree], and the
horizontal axis represents time [ms].

PhaseErr vs. SC_No Displays phase error as a symbol in a bar graph. The vertical

axis represents phase error [Degree], and the horizontal axis
represents subcarrier number [-26 to +26]

Center Frequency Error Displays carrier wave frequency deviation as a symbol in a line

graph. The vertical axis represents deviation [kHz], and the
horizontal axis represents time [ms].

OFDM Linearity Displays linearity of OFDM modulation in a line graph. The

vertical axis represents actual measurement values [mW], and

the horizontal axis represents ideal values [mW].
Symbol Table Displays a table of symbol values (hexadecimal and binary).
Spectrum Mask Displays spectrum waveform and mask in a line graph under

PeakHold condition. The vertical axis represents power [dBm],

and the horizontal axis represents frequency [Hz].

.

.

.

Table 2-11 lists the view format for the IEEE802.11b standard.

Table 2-11: View format - IEEE802.11b signals

Item Description

Average Power vs. Time Displays power of carriers in a line graph. The vertical axis

represents power [dBm], and the horizontal axis represents

time [ms].
Power vs. Time Displays power of carriers by the segment in a bar graph. The

vertical axis represents power [dBm], and the horizontal axis

represents time [ms].
Constellation Displays constellation of carriers in a rectangular coordinates

graph. The vertical axis represents Q, and the horizontal axis

represents I.
Segment Constellation Displays constellation of carriers by the segment in a

rectangular coordinates graph. The vertical axis represents Q,

and the horizontal axis represents I.

2-20 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Table 2-11: View format - IEEE802.11b signals (cont.)

Item Description

Average EVM vs. Time Displays EVM of carriers in a line graph. The vertical axis

represents EVM [%], and the horizontal axis represents time
[ms].

EVM vs. Time Displays EVM of carriers by the segment in a bar graph. The

vertical axis represents EVM [%], and the horizontal axis
represents time [ms].

Average MagErr vs. Time Displays magnitude error of carriers in a line graph. The vertical

axis represents magnitude error [%], and the horizontal axis
represents time [ms].

MagErr vs. Time Displays magnitude error of carriers by the segment in a bar

graph. The vertical axis represents magnitude error [%], and
the horizontal axis represents time [ms].

Average PhaseErr vs. Time Displays phase error of carriers in a line graph. The vertical axis

represents phase error [Degree], and the horizontal axis
represents time [ms].

PhaseErr vs. Time Displays phase error of carriers by the segment in a bar graph.

The vertical axis represents phase error [Degree], and the
horizontal axis represents time [ms].

Center Frequency Error Displays carrier wave frequency deviation in a line graph. The

vertical axis represents deviation [kHz], and the horizontal axis

represents time [ms].
Symbol Table Displays a table of symbol values (hexadecimal and binary).
Spectrum Mask Displays spectrum waveform and mask in a line graph under

PeakHold condition. The vertical axis represents power [dBm],

and the horizontal axis represents frequency [Hz].
Transmit Power On Displays the transmit power on ramp in a line graph. The

vertical axis represents power [W], and the horizontal axis

represents time [ms].
Transmit Power Off Displays the transmit power down ramp in a line graph. The

vertical axis represents power [W], and the horizontal axis

represents time [ms].

Table 2-12 lists the view format for the IEEE802.11g standard.

Table 2-12: View format - IEEE802.11g signals

Item Description

Average Power vs. Time Displays power of carriers, or one or all subcarriers in a line

graph. The vertical axis represents power [dBm], and the

horizontal axis represents time [ms].
Power Analysis Display Displays each subcarrier wave power as an OFDM symbol, or

power by the segment in a bar graph. The vertical axis

represents power [dBm], and the horizontal axis represents

subcarrier wave number [-26 to +26] or time [ms]

.

WCA11G IEEE802.11a/b/g User Manual 2-21

Operating Basics

Table 2-12: View format - IEEE802.11g signals (cont.)

Item Description

Flatness Displays each subcarrier wave flatness in a bar graph. The

vertical axis represents average energy deviation power [dB],
and the horizontal axis represents subcarrier wave number [-26
to +26]

.

Constellation Displays constellation of carriers, or constellation of one or all

subcarriers in a rectangular coordinates graph. The vertical
axis represents Q, and the horizontal axis represents I.

Constellation Analysis Display Displays constellation of each subcarrier as an OFDM symbol,

constellation by the segment in a rectangular coordinates
graph. The vertical axis represents Q, and the horizontal axis
represents I.

Average EVM vs. Time Displays EVM of carriers, or one or all subcarriers in a line

graph. The vertical axis represents EVM [%], and the horizontal
axis represents time [ms].

EVM Analysis Display Displays EVM as an OFDM symbol, or EVM by the segment in

a bar graph. The vertical axis represents EVM [%], and the
horizontal axis represents subcarrier wave number [-26 to +26]
or time [ms]

Average MagErr vs. Time Displays magnitude error of carriers, or one or all subcarriers in

a line graph. The vertical axis represents magnitude error [%],
and the horizontal axis represents time [ms].

MagErr Analysis Display Displays magnitude error as an OFDM symbol, or magnitude

error by the segment in a bar graph. The vertical axis
represents magnitude error [%], and the horizontal axis
represents subcarrier number [-26 to +26] or time [ms]

Average PhaseErr vs. Time Displays phase error of carriers, or one or all subcarriers in a

line graph. The vertical axis represents phase error [Degree],
and the horizontal axis represents time [ms].

PhaseErr Analysis Display Displays phase error as an OFDM symbol, or phase error by

the segment in a bar graph. The vertical axis represents phase
error [Degree], and the horizontal axis represents subcarrier
number [-26 to +26] or time [ms]

Center Frequency Error Displays carrier wave frequency deviation as an OFDM symbol

in a line graph. The vertical axis represents deviation [kHz], and

the horizontal axis represents time [ms].
Symbol Table Displays a table of symbol values (hexadecimal and binary).
OFDM Linearity Displays linearity of OFDM modulation in a line graph. The

vertical axis represents actual measurement values [mW], and

the horizontal axis represents ideal values [mW].
Spectrum Mask Displays spectrum waveform and mask in a line graph under

PeakHold condition. The vertical axis represents power [dBm],

and the horizontal axis represents frequency [Hz].
Transmit Power On Displays the transmit power on ramp in a line graph. The

vertical axis represents power [W], and the horizontal axis

represents time [ms].
Transmit Power Off Displays the transmit power down ramp in a line graph. The

vertical axis represents power [W], and the horizontal axis

represents time [ms].

.

.

.

2-22 WCA11G IEEE802.11a/b/g User Manual

Operating Basics

Scale Adjustment

You can change the scale of a View screen by the following steps:

1. In the view in which you want to change the scale, double-click the start or end
point of the horizontal (or vertical) axis.

The scale input box appears as shown in Figure 2-10.

Scale input box

Figure 2-10: Scale input box

2. Input t a new value in the box, and then press the Enter key to change the scale.

If you want to change the vertical scale, double-click the start or end point of the
vertical axis, repeating the same steps above.

WCA11G IEEE802.11a/b/g User Manual 2-23

Operating Basics

2-24 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

This section provides information about the view formats of the WCA11G
IEEE802.11a/b/g Signal Analysis Software. The view format descriptions are
divided into two subsections: Modulation Analysis and Power Analysis.

Modulation Analysis Test

Procedure

Do the following steps to perform the modulation analysis:

1. Confirm that MODULATION is selected as the ANALYSIS TYPE.

The modulation analysis setting window becomes available.

2. Use the SETUP menu to input analysis parameters.

a. Specify the standard you want to test from the Standard pull-down list.

b. Select the modulation type (data rate) or specify AUTO from the

Modulation Type pull-down list.

c. Select or clear the Long Training Symbol Synchronization and

Equalization options as necessary.

3. Click either the WCA or the IQT radio button in the SELECT SOURCE to

open the Read From WCA dialog box. Refer to page 2-8 for the details on the
SELECT SOURCE menu and the Read From WCA dialog box.

Set the parameters in the Read From WCA dialog box, and then close the
dialog box.

4. Click the START button to start the analysis.

Click the CANCEL button if you want to cancel the analysis.

5. Use the View menu to modify the displayed graph.

6. If you want to change the view format, use the pull-down list on the View

screen as shown in Figure 2-9 on page 2-19.

WCA11G IEEE802.11a/b/g User Manual 3-1

Modulation Analysis

Modulation Analysis View Formats

This subsection describes each modulation analysis view format.

Power vs. All Time

This display shows the power in a line graph as shown in Figure 3-1. The vertical
axis represents power [dBm], and the horizontal axis represents time [ms].

The Main View (upper left window in 2 x 2 view style) is fixed to Power vs. All
Time view format, and D_Marker1 and D_Marker2 are always displayed.

Figure 3-1: Power vs. All Time display

Setup Parameters. In the Power vs. All Time display, you can set the parameters

listed in Table 3-1.

Table 3-1: Power vs. All Time parameters

Standard Item Description

IEEE802.11a/b/g D_Marker1

D_Marker2

Start Time data of D_Marker1
End Time data of D_Marker2
Length D_Marker2 - D_Marker1

Two markers (D_Marker1 and D_Marker2) are
displayed in the Main View. You can use these
markers to specify the display range for View1,
View2, or View3.

3-2 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

Average Power vs. Time

This display shows the power in a line graph as shown in Figure 3-2. The vertical
axis represents power [dBm], and the horizontal axis represents time [ms].

Figure 3-2: Average Power vs. Time

Table 3-2 lists the setup parameters for this view format.

Table 3-2: Average Power vs. Time setup parameters

Standard Parameter Description

IEEE802.11a Select Subcarrier Specify the data format. Available options are

All Data, All Pilot, All, and Single Subcarrier.

Subcarrier # Sets the subcarrier number when Single

Subcarrier is selected for Select Subcarrier (-26
to 26).

IEEE802.11b Select Subcarrier These parameters are not available.

Subcarrier #

IEEE802.11g (OFDM) Select Subcarrier Specify the data format. Available options are

All Data, All Pilot, All, and Single Subcarrier.

Subcarrier # Sets the subcarrier number when Single

Subcarrier is selected for Select Subcarrier
(-26 to 26).

IEEE802.11g (DSSS) Select Subcarrier These parameters are not available.

Subcarrier #

WCA11G IEEE802.11a/b/g User Manual 3-3

Modulation Analysis

Table 3-3 shows the initial measurement items. The measurement results are
recalculated for each symbol or segment.

Table 3-3: Average Power vs. Time measurements

Standard Readout Description

IEEE802.11a Max Displays the maximum power [W] and

[dBm] of one or all subcarriers.

Min Displays the minimum power [W] and

[dBm] of one or all subcarriers.

Ave Displays the average power [W] and [dBm]

of one or all subcarriers.

IEEE802.11b Max Displays the maximum power [W] and

[dBm] of carriers.

Min Displays the minimum power [W] and

[dBm] of carriers.

Ave Displays the average power [W] and [dBm]

of carriers.

IEEE802.11g Max Displays the maximum power [W] and

[dBm] of carriers, or one or all subcarriers.

Min Displays the minimum power [W] and

[dBm] of carriers, or one or all subcarriers.

Ave Displays the average power [W] and [dBm]

of carriers, or one or all subcarriers.

Power Analysis Display

This analysis display is the same as one of the following view formats depending
on the modulation signal. If you select Power Analysis Display, the displayed
graph automatically toggles depending on the modulation format.

 If the displayed data is OFDM, refer to Power vs. SC_No on page 3-5.

 If the displayed data is DSSS, refer to Power vs. Time on page 3-6.

3-4 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

Power vs. SC_No

This bar graph shows the power in each subcarrier of one OFDM symbol;
designates the symbol in the setting window by setting the Symbol or Segment #.
The vertical axis represents Power [dBm], and the horizontal axis represents
subcarrier number (-26 to +26).

Figure 3-3: Power vs. SC_No display

Table 3-4 lists the setup parameters for this view format.

Table 3-4: Power vs. SC_No parameter

Standard Parameter Description

IEEE802.11a Symbol or Segment # Specifies or changes the symbol number for the

currently displayed bar graph.

The following list shows the initial measurement items.

Readout Description

Max Displays the maximum power [W] and [dBm], and its subcarrier

number.

Min Displays the minimum power [W] and [dBm], and its subcarrier

number.

Ave Displays the average power of all subcarrier [W] and [dBm].

WCA11G IEEE802.11a/b/g User Manual 3-5

Modulation Analysis

Power vs. Time

The Power vs. Time display shows the power of carriers by the segment in a bar
graph, as shown in Figure 3-4. The vertical axis represents power [dBm], and the
horizontal axis represents time [ms].

Figure 3-4: Power vs. Time

The following table shows the setup parameters for this view format.

Standard Parameter Description

IEEE802.11b Symbol or Segment # Specifies or changes the segment number for

the currently displayed bar graph.

The following list shows the initial measurement items.

Readout Description

Max Displays [W] and [dBm] of maximum power.
Min Displays [W] and [dBm] of minimum power.
Ave Displays [W] and [dBm] of average power.

3-6 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

Flatness

This display shows each subcarrier wave flatness in a bar graph, as shown in Figure
3-5. The vertical axis represents average energy deviation power [dB], and the
horizontal axis represents subcarrier wave number [-26 to +26].

Constellation Analysis

Display

Figure 3-5: Flatness measurement

Verify that the measurement results (bar graph) fall within the threshold level (two
red lines).

The following list shows the initial measurement item.

Readout Description

Center Frequency Leakage Displays the carrier leakage power [dB] (<2 dB in IEEE802.11a

standard).

This analysis display is the same as one of the following view formats depending
on the modulation signal. If you select Constellation Analysis Display, the
displayed graph automatically toggles depending on the modulation format.

 If the displayed data is OFDM, refer to Constellation/Symbol Constellation on

page 3-8.

 If the displayed data is DSSS, refer to Constellation/Segment Constellation on

page 3-11.

WCA11G IEEE802.11a/b/g User Manual 3-7

Modulation Analysis

Constellation/Symbol

Constellation

The Constellation display shows constellation of one or all subcarriers in a
rectangular coordinates graph, as shown in Figure 3-6. The vertical axis represents
I, and the horizontal axis represents Q.

Figure 3-6: Constellation display

Table 3-5 lists the setup parameters for the Constellation and Symbol Constellation
view formats.

Table 3-5: Setup parameters

Standard View Format Item Description

IEEE802.11a Constellation Select Subcarrier Specify the data format. Available

options are All Data, All Pilot, All, and
Single Subcarrier.

Subcarrier # Sets the subcarrier number when

Single Subcarrier is selected for
Select Subcarrier (-26 to 26).

Symbol
Constellation

Symbol or
Segment #

Specifies or changes the symbol
number for the currently displayed
data.

3-8 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

The Symbol Constellation display shows constellation as a symbol in a rectangular
coordinates graph, as shown in Figure 3-7. The vertical axis represents I, and the
horizontal axis represents Q.

Figure 3-7: Symbol Constellation display

WCA11G IEEE802.11a/b/g User Manual 3-9

Modulation Analysis

Pop-up View Menu. Table 3-6 lists the View menu items from the Menu bar. You
can also set up these parameters with pop-up menus on each of the View screens.
Right-click the view screen to display the pop-up menus. See Figure 3-8.

Table 3-6: View menu setup parameters

Main/Sub menu Option Description

View/Main Normalization On Applies normalization to the

constellation display.

Off Excludes normalization from the

constellation display.

Normalization Factor AUTO Selects modulation format for

BPSK
QPSK
8PSK
16QAM
64QAM

Vector On Activates vector between symbols.

Off Inactivates vector between symbols.

normalization. These selections are
exclusive.

Figure 3-8: Pop-up View menu

3-10 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

Constellation/Segment

Constellation

This display shows a constellation of carriers in a rectangular coordinates graph, as
shown in Figure 3-9. The vertical axis represents I, and the horizontal axis
represents Q.

Figure 3-9: Segment Constellation display

Table 3-7 lists the setup parameters for the Constellation and Segment
Constellation view formats.

Table 3-7: Segment Constellation setup parameters

Standard View Format Item Description

IEEE802.11b Constellation None

Segment
Constellation

Symbol or
Segment #

Specifies or changes the segment
number for the currently displayed
data.

Table 3-6 on page 3-10 lists the View menu items from the Menu bar. You can also
set up these parameters with the pop-up menus on each View screen, as shown in
Figure 3-8.

WCA11G IEEE802.11a/b/g User Manual 3-11

Modulation Analysis

Average EVM vs. Time

This display shows the EVM of carriers, or one or all subcarriers in a line graph, as
shown in Figure 3-10. The vertical axis represents EVM [%], and the horizontal
axis represents time [ms].

Figure 3-10: Average EVM vs. Time display

Table 3-8 lists the setup parameters for this view format.

Table 3-8: Average EVM vs. Time setup parameters

Standard Parameter Description

IEEE802.11a/g Select Subcarrier Specify the data format. Available options are

All Data, All Pilot, All, and Single Subcarrier.

Subcarrier # Sets the subcarrier number when Single

Subcarrier is selected for Select Subcarrier (-26
to 26).

IEEE802.11b Select Subcarrier These parameters are not available.

Subcarrier #

Table 3-9 shows the initial measurement items. The measurement results are
recalculated.

Table 3-9: Average EVM vs. Time measurements

Readout Description

Max Displays the maximum value of EVM.
Min Displays the minimum value of EVM.
Ave Displays the average value of EVM.

3-12 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

EVM Analysis Display

EVM vs. SC_No

This analysis display is the same as one of the following view formats depending
on the modulation signal. If you select EVM Analysis Display, the displayed graph
automatically toggles depending on the modulation format.

 If the displayed data is OFDM, refer to EVM vs. SC_No on page 3-13.

 If the displayed data is DSSS, refer to EVM vs. Time on page 3-15.

This bar graph shows the EVM in each subcarrier of one OFDM symbol designated
with the Symbol or Segment # in the setting window. The vertical axis represents
EVM [%], and the horizontal axis represents subcarrier number (-26 to +26).

Figure 3-11: EVM vs. SC_No display

The following table lists the setup parameters for this view format.

Standard Parameter Description

IEEE802.11a Symbol or Segment # Specifies or changes the symbol number for the

currently displayed bar graph.

WCA11G IEEE802.11a/b/g User Manual 3-13

Modulation Analysis

Table 3-10 shows the initial measurement items. The measurement results are
recalculated.

Table 3-10: EVM vs. SC_No measurements

Readout Description

Max Displays the maximum value of EVM.
Min Displays the minimum value of EVM.
Ave Displays the average value of EVM.

Table 3-11 lists the allowed relative constellation error versus data rate.

Table 3-11: EVM allowable value for IEEE802.11a

Data rate [Mb/s] Allowable EVM [dB]

6-5

9-8
12 -10
18 -13
24 -16
36 -19
48 -22
54 -25

3-14 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

EVM vs. Time

This display shows the EVM of carriers by the segment in a bar graph, as shown in
Figure 3-12. The vertical axis represents EVM [%], and the horizontal axis
represents time [ms].

Figure 3-12: EVM vs. Time display

The following table shows the setup parameter for this view format.

Standard Parameter Description

IEEE802.11b Symbol or Segment # Specifies or changes the segment number for

the currently displayed bar graph.

The following list shows the initial measurement items.

Readout Description

Max Displays the maximum value of magnitude EVM.
Min Displays the minimum value of magnitude EVM.
Ave Displays the average value of magnitude EVM.

WCA11G IEEE802.11a/b/g User Manual 3-15

Modulation Analysis

Average MagErr vs Time

This display shows the magnitude error of carriers, or one or all subcarriers in a line
graph, as shown in Figure 3-13. The vertical axis represents magnitude error [%],
and the horizontal axis represents time [ms].

Figure 3-13: Average MagErr vs. Time

Table 3-12 lists the setup parameters for this view format.

Table 3-12: Average MagErr vs. Time setup parameters

Standard Parameter Description

IEEE802.11a/g Select Subcarrier Specify the data format. Available options are

All Data, All Pilot, All, and Single Subcarrier.

Subcarrier # Sets the subcarrier number when Single

Subcarrier is selected for Select Subcarrier (-26
to 26).

IEEE802.11b Select Subcarrier These parameters are not available.

Subcarrier #

3-16 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

Table 3-13 shows the initial measurement items. The measurement results are
recalculated.

Table 3-13: Average MagErr vs. Time measurements

Readout Description

Max Displays the maximum value of magnitude error.
Min Displays the minimum value of magnitude error.
Ave Displays the average value of magnitude error.

MagErr Analysis Display

This analysis display is the same as one of the following view formats depending
on the modulation signal. If you select MagErr Analysis Display, the displayed
graph automatically toggles depending on the modulation format.

 If the displayed data is OFDM, refer to MagErr vs. SC_No 3-18.

 If the displayed data is DSSS, refer to MagErr vs. Time on page 3-19.

WCA11G IEEE802.11a/b/g User Manual 3-17

Modulation Analysis

MagErr vs. SC_No

This display shows the magnitude error of each OFDM symbol in a bar graph, as
shown in Figure 3-14. The vertical axis represents magnitude error [%], and the
horizontal axis represents the subcarrier wave number (-26 to +26).

Figure 3-14: MagErr vs. SC_No display

The following table lists the setup parameters for this view format.

Standard Parameter Description

IEEE802.11a Symbol or Segment # Specifies or changes the symbol number for the

currently displayed bar graph.

The following table shows the initial measurement items. The measurement results
are recalculated for each symbol.

Readout Description

Max Displays the maximum value of magnitude error.
Min Displays the minimum value of magnitude error.
Ave Displays the average value of magnitude error.

3-18 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

MagErr vs. Time

This display shows the magnitude error of carriers by the segment in a bar graph,
as shown in Figure 3-15. The vertical axis represents magnitude error [%], and the
horizontal axis represents time [ms].

Figure 3-15: MagErr vs. Time

The following table shows the setup parameter for this view format.

Standard Parameter Description

IEEE802.11b Symbol or Segment # Specifies or changes the segment number for

the currently displayed bar graph.

The following list shows the initial measurement items.

Readout Description

Max Displays the maximum value of magnitude error.
Min Displays the minimum value of magnitude error.
Ave Displays the average value of magnitude error.

WCA11G IEEE802.11a/b/g User Manual 3-19

Modulation Analysis

Average PhaseErr vs Time

This display shows the Phase Error of carriers, or one or all subcarriers in a line
graph, as shown in Figure 3-16. The vertical axis represents phase error [Degree],
and the horizontal axis represents time [ms].

Figure 3-16: Average PhaseErr vs. Time display

Table 3-14 lists the setup parameters for this view format.

Table 3-14: Average PhaseErr vs. Time setup parameters

Standard Parameter Description

IEEE802.11a/g Select Subcarrier Specify the data format. Available options are

All Data, All Pilot, All, and Single Subcarrier.

Subcarrier # Sets the subcarrier number when Single

Subcarrier is selected for Select Subcarrier (-26
to 26).

IEEE802.11b Select Subcarrier These parameters are not available.

Subcarrier #

3-20 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

Table 3-15 shows the initial measurement items. The measurement results are
recalculated.

Table 3-15: Average PhaseErr vs. Time measurements

Readout Description

Max Displays the maximum value of phase error.
Min Displays the minimum value of phase error.
Ave Displays the average value of phase error.

PhaseErr Analysis Display

This analysis display is the same as the following view format depending on the
modulation signal. If you select PhaseErr Analysis Display, the displayed graph
automatically toggles depending on the modulation format.

 If the displayed data is OFDM, refer to PhaseErr vs. SC_No on page 3-22.

 If the displayed data is DSSS, refer to PhaseErr vs. Time on page 3-23.

WCA11G IEEE802.11a/b/g User Manual 3-21

Modulation Analysis

PhaseErr vs SC_No

This display shows the Phase Error of each OFDM symbol in a line graph, as
shown in Figure 3-17. The vertical axis represents phase error [Degree], and the
horizontal axis represents the subcarrier wave number (-26 to +26).

Figure 3-17: PhaseErr vs. SC_No display

The following list shows the setup parameter for this view format.

Standard Parameter Description

IEEE802.11a Symbol or Segment # Specifies or changes the symbol number for the

currently displayed bar graph.

The following list shows the initial measurement items. The measurement results
are recalculated for each symbol.

Readout Description

Max Displays the maximum value of phase error.
Min Displays the minimum value of phase error.
Ave Displays the average value of phase error.

3-22 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

PhaseErr vs Time

This display shows Phase Error of carriers by the segment in a bar graph, as shown
in Figure 3-18. The vertical axis represents phase error [Degree], and the horizontal
axis represents time [ms].

Figure 3-18: PhaseErr vs. Time display

The following table shows the setup parameter for this view format.

Standard Parameter Description

IEEE802.11b Symbol or Segment # Specifies or changes the segment number for

the currently displayed bar graph.

The following list shows the initial measurement items.

Readout Description

Max Displays the maximum value of phase error.
Min Displays the minimum value of phase error.
Ave Displays the average value of phase error.

WCA11G IEEE802.11a/b/g User Manual 3-23

Modulation Analysis

Center Frequency Error

This display shows the center frequency error versus time in a line graph, as shown
in Figure 3-19. The vertical axis represents frequency error [kHz], and the
horizontal axis represents time [ms].

Figure 3-19: Center frequency error display

Table 3-16 shows the initial measurement items.

Table 3-16: Center frequency error measurements

Readout Description

Max Displays the maximum frequency error and its time.
Min Displays the minimum frequency error and its time.
Ave Displays the average frequency error.

3-24 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

OFDM Linearity

This display shows the linearity of OFDM modulation in a line graph, as shown in
Figure 3-20, where the vertical axis represents actual measurement values [mW],
and the horizontal axis represents the ideal values [mW].

Figure 3-20: OFDM Linearity display

This view does not display the measurement readouts.

WCA11G IEEE802.11a/b/g User Manual 3-25

Modulation Analysis

Symbol Table

This display shows the symbol tables, as shown in Figure 3-21 and Figure 3-22.
The tables can be displayed with hexadecimal digits (Hex) or binary (Bin).

Figure 3-21: Symbol table (Hex)

.

Figure 3-22: Symbol table (Bin)

3-26 WCA11G IEEE802.11a/b/g User Manual

Modulation Analysis

File (F) Menu. If you want to save the symbol table in text format, select File from
the Menu bar, and then select Save SymbolTable. You can select the format (Hex
or Bin) in the displayed dialog box.

Table 3-17 lists the setup parameters for this view format.

Table 3-17: Symbol Table parameter

Standard Parameter Description

IEEE802.11a/b/g Symbol or Segment # Specifies or changes the symbol number for the

currently displayed table.

Table 3-18 lists the setup parameters from the Menu bar. You can also use the
pop-up View menus on each View screen, as shown in Figure 3-8 on page 3-10.

Table 3-18: Menu bar setup parameters for Symbol Table

Main/Sub menu Option Description

View/Main Symbol Table Hex Displays symbol table values as

hexadecimal.

Bin Displays symbol table values as bin.

File SaveSymbolTable Saves the symbol table as a text file.

WCA11G IEEE802.11a/b/g User Manual 3-27

Power Analysis

Power Analysis

The power analysis consists of Spectrum Mask, Transmit Power On, and Transmit
Power Off.

Power Analysis Test

Procedure

Do the following steps to perform the power measurement:

1. Confirm that POWER is selected as the ANALYSIS TYPE.

The power analysis setting window becomes active.

2. Use the SETUP menu to set the following parameters:

a. Specify the standard you want to test from the Standard pull-down list.

b. Select the test item from the Test pull-down list.

3. Click the SETUP... button in the MEASUREMENT field to open the Read

From WCA dialog box.

Use the Read From WCA dialog box to set the parameters as necessary.

4. Click the START button to start the analysis.

Click the CANCEL button if you want to cancel the analysis.

3-28 WCA11G IEEE802.11a/b/g User Manual

Power Analysis View Formats

This subsection describes each view format for the power analysis.

Power Analysis

Spectrum Mask (OFDM)

This display shows the spectrum waveform and mask in a line graph under
PeakHold condition, as shown in Figure 3-23. The vertical axis represents power
[dBm], and the horizontal axis represents frequency [Hz].

Figure 3-23: Spectrum mask (OFDM)

Verify that the measurement results (line graph) fall within the threshold level. This
view does not display the measurement readouts.

WCA11G IEEE802.11a/b/g User Manual 3-29

Power Analysis

Figure 3-24 shows the IEEE802.11a standard for Spectrum Mask.

Power Spectral Density (dB)

Typical Signal Spectrum

-30 -20 -11 -9 9 11 20 30

Figure 3-24: IEEE802.11a spectrum mask

Transmit Spectrum Mask

-20dB

-28dB

-40dB

fc

Frequency (MHz)

3-30 WCA11G IEEE802.11a/b/g User Manual

Power Analysis

Spectrum Mask (DSSS)

This display shows the spectrum waveform and mask in a line graph under
PeakHold condition, as shown in Figure 3-25. The vertical axis represents power
[dBm], and the horizontal axis represents frequency [Hz].

Figure 3-25: Spectrum mask (DSSS)

Verify that the measurement results (line graph) fall within the threshold level. This
view does not display the measurement readouts.

Figure 3-26 shows the IEEE802.11b standard for Spectrum Mask.

Transmit Spectrum Mask

0 dB

fc-11MHzfc-22MHz

fc

Unfiltered Sinx/x

-30 dB

-50 dB

fc+11MHz fc+22MHz

Figure 3-26: IEEE802.11b spectrum mask

WCA11G IEEE802.11a/b/g User Manual 3-31

Power Analysis

Transmit Power On

This display shows the transmit power on ramp in a line graph. The vertical axis
represents power [W], and the horizontal axis represents time [s].

Figure 3-27: Transmit Power On display

Verify that the measurement results (line graph) fall within the threshold level. This
view does not display the measurement readouts.

Figure 3-28 shows the IEEE802.11b standard for the transmit power-on ramp.

Max Tx Power

Transmit
Power
Output

10% Max

01 2 34

Time µsec

90% Max

Figure 3-28: IEEE802.11b Transmit power-on ramp

3-32 WCA11G IEEE802.11a/b/g User Manual

Power Analysis

Transmit Power Off

This display shows the transmit power down ramp in a line graph. The vertical axis
represents power [W], and the horizontal axis represents time [s].

Figure 3-29: Transmit Power Off display

Verify that the measurement results (line graph) fall within the threshold level. This
view does not display the measurement readouts.

Figure 3-30 shows the IEEE802.11b standard for the transmit power-down ramp.

Max Tx Power

Transmit
Power
Output

012 3 4

Time µsec

90% Max

10% Max

Figure 3-30: IEEE802.11b Transmit power-down ramp

WCA11G IEEE802.11a/b/g User Manual 3-33

Power Analysis

3-34 WCA11G IEEE802.11a/b/g User Manual

Index

A

Address

Tektronix

All

Select Subcarrier

All Data

Select Subcarrier

All Pilot

Select Subcarrier

Analysis Type buttons

screen elements

Average EVM vs. Time

IEEE802.11a signals
IEEE802.11b signals
IEEE802.11g signals
view format

Average MagErr vs. Time

IEEE802.11a signals
IEEE802.11b signals
IEEE802.11g signals
view format

Average PhaseErr vs. Time

IEEE802.11a signals
IEEE802.11b signals
IEEE802.11g signals
view format

Average Power vs. Time

IEEE802.11a signals
IEEE802.11b signals
IEEE802.11g signals
view format

viii

2-13

2-13

2-13

2-5

1-3, 2-20
1-4, 2-21
1-5, 2-22

3-12

1-3, 2-20
1-4, 2-21
1-6, 2-22

3-16

1-3, 2-20
1-4, 2-21
1-6, 2-22

3-20

1-3, 2-19
1-4, 2-20
1-5, 2-21

3-3

B

Block Size

Read From WCA dialog box parameter

C

2-9

Center Frequency Error

IEEE802.11a signals
IEEE802.11b signals
IEEE802.11g signals
view format

Channel Table

Read From WCA dialog box parameter

CHECK ALL

Display Modulation Type dialog box

CHECK NONE

Display Modulation Type dialog box

CLOSE

Read From WCA dialog box (IQT) parameter

2-12

Read From WCA dialog box parameter

Constellation

IEEE802.11a signals
IEEE802.11b signals
IEEE802.11g signals
view format

Constellation Analysis Display

IEEE802.11g signals

view format
Contacting Tektronix
Created Folders

installation

3-24

3-8, 3-11

3-7

1-9

1-3, 2-20

1-5, 2-21
1-6, 2-22

2-9, 2-10

2-16

2-16

2-9

1-3, 2-19

1-4, 2-20
1-5, 2-22

1-5, 2-22

viii

D

Data part

length of segment
Despread or FFT

View menu
DISPLAY MOD. TYPE...

modulation analysis VIEW parameter
Display Modulation Type dialog box
D_Marker1
D_Marker2
DSSS

length of segment

2-19
2-19

2-15

2-2

2-13

2-16

2-15

CANCEL

2-17

2-6

2-9

E

Equalization

modulation analysis SETUP parameter
Ethernet Setup

Tool menu

2-3

2-6

modulation analysis SETUP parameter
Power Analysis SETUP parameter

CCK

length of segment

Center Frequency

Read From WCA dialog box parameter

WCA11G IEEE802.11a/b/g User Manual Index-1

2-15

Index

EVM Analysis Display

IEEE802.11g signals
view format

EVM vs. SC_No

IEEE802.11a signals
view format

EVM vs. Time

IEEE802.11b signals
view format

Exit submenu

File menu

3-13

3-13

3-15

2-2

1-6, 2-22

1-3, 2-20

1-4, 2-21

F

File menu 2-2
Flatness

IEEE802.11a signals
IEEE802.11g signals
view format

Folder Setup

Tool menu

3-7

2-3

1-3, 2-19
1-5, 2-22

G

Glossary ix
Graph Frame

screen elements

Graph Window Pane

2-5

2-18

H

Hardware Configuration 1-7
Header part

length of segment
Help menu
Help...

Helpr menu

2-3

2-15

2-3

Input

Read From WCA dialog box parameter

Installation

1-8

L

LAN cross cable

standard accessory

Line Code Settings

WCA330/WCA380

Long OFDM training symbol

length of segment

Long Training Symbol Synchronization

modulation analysis SETUP parameter

1-8

1-15

2-15

M

MagErr Analysis Display

IEEE802.11g signals
view format

MagErr vs. SC_No

IEEE802.11a signals
view format

MagErr vs. Time

IEEE802.11b signals
view format

Main submenu

View menu
Manual Structure
MEASUREMENT

Power Analysis SETUP parameter
Menu Bar
Menu Items
M_Marker1

View menu
M_Marker2

View menu
M_MarkerReset

View menu

3-17

3-18

3-19

2-2

2-2

2-2

2-2

2-2

2-2

1-6, 2-22

1-3, 2-20

1-4, 2-21

vii

2-17

2-9

2-6

I

I/O Port

WCA330/WCA380

IEEE802.11a signals

view format

IEEE802.11b signals

view format

IEEE802.11g signals

view format

Index-2 WCA11G IEEE802.11a/b/g User Manual

2-19

2-20

2-21

1-15

1-3

1-4

1-5