User Manual
WCA230A & WCA280A Option 25
cdma2000 Analysis Software
071-1367-01
This document supports software version 1.00 and above.
www.tektronix.com
Copyright © Tektronix, Inc. All rights reserved. Licensed software products are owned by Tektronix or its subsidiaries or
suppliers, and are protected by national copyright laws and international treaty provisions.
Tektronix products are covered by U.S. and foreign patents, issued and pending. Information in this publication supercedes
that in all previously published material. Specifications and price change privileges reserved.
TEKTRONIX and TEK are registered trademarks of Tektronix, Inc.
Contacting Tektronix
Tektronix, Inc.
14200 SW Karl Braun Drive
P.O. Box 500
Beaverton, OR 97077
USA
For product information, sales, service, and techni cal support:
H In North America, call 1-800-833-9200.
H Worldwide, visit www.tektronix.com to find contacts in your area.
Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1)
year from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its
option, either will repair the defective product without charge for parts and labor, or will provide a replacement i n
exchange for the defective product. Parts, modules and replacement products used by Tektronix for warranty work
may be new or reconditioned to like new performance. All replaced parts, modules and products become the
property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration
of the warranty period and make suitable arrangements for the performance of service. Customer shall be
responsible for packaging and shipping the defective product to t he servic e center designated by Tektronix, with
shipping charges prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a
location within the country in which the Tektronix service center is located. Customer shall be responsible for
paying all shipping charges, duties, taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defec t, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish servic e under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product;
b) to repair damage resulting from improper use or connection to incompatible equipment; c) to repair any
damage or malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has be en
modified or integrated with other products when the effect of such modification or integration increases the time
or difficulty of servicing the product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY
OTHER WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY
IMPLIED WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A P ARTICULAR PURPOSE.
TEKTRONIX’ RESPONSIBILITY TO REP AIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND
EXCLUSIVE REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY.
TEKTRONIX AND ITS VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL,
OR CONSEQUENTIAL DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS
ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
Getting Started
Operating Basics
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Related Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vii
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Product Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Functional Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
cdma2000 Forward Link Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Modulation Accuracy Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Code Domain Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
OBW Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
ACPR Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Spectrum Emission Mask Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Intermodulation Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
CCDF Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-30
Pilot to Code Channel Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
cdma2000 Reverse Link Measurements . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Modulation Accuracy Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Code Domain Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-47
Pilot to Code Channel Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
Gated Output Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Editing the Measurement Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Using the Measurement Limits Editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Saving and Loading Measurement Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66
Measurement Limit Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Syntax and Commands
Command Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
:CONFigure Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
:DISPlay Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
:FETCh Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
:MMEMory Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
:READ Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
:SENSe Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual i
Table of Contents
Appendices
:CONFigure Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-11
:DISPlay Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-17
:FETCh Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-43
:MMEMory Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-61
:READ Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-63
:SENSe Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-75
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Setting Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
SCPI Conformance Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . D-1
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Index-1
ii WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual
List of Figures
List of Figures
Figure 2-1: Menu diagram showing measurement functions available
in Option 25 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Figure 2-2: Modulation accuracy measurement . . . . . . . . . . . . . . . . . . . . 2-4
Figure 2-3: Modulation accuracy display . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Figure 2-4: EVM display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
Figure 2-5: MagErr display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Figure 2-6: PhaseErr display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Figure 2-7: Symbol table display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Figure 2-8: Code domain power measurement . . . . . . . . . . . . . . . . . . . . 2-13
Figure 2-9: Code domain power display . . . . . . . . . . . . . . . . . . . . . . . . . 2-17
Figure 2-10: Power codogram display . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-19
Figure 2-11: IQ power graph display . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Figure 2-12: Channel power measurement . . . . . . . . . . . . . . . . . . . . . . . 2-23
Figure 2-13: OBW measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-24
Figure 2-14: ACPR measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Figure 2-15: Spectrum emission mask measurement . . . . . . . . . . . . . . . 2-26
Figure 2-16: Intermodulation measurement . . . . . . . . . . . . . . . . . . . . . . 2-28
Figure 2-17: CCDF measurement (single view) . . . . . . . . . . . . . . . . . . . . 2-30
Figure 2-18: Scale settings in the CCDF display . . . . . . . . . . . . . . . . . . . 2-32
Figure 2-19: Pilot to code channel measurement . . . . . . . . . . . . . . . . . . . 2-33
Figure 2-20: Modulation accuracy measurement-reverse link . . . . . . . 2-38
Figure 2-21: Modulation accuracy display-reverse link . . . . . . . . . . . . . 2-42
Figure 2-22: EVM display-reverse link . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43
Figure 2-23: MagErr display-reverse link . . . . . . . . . . . . . . . . . . . . . . . . 2-44
Figure 2-24: PhaseErr display-reverse link . . . . . . . . . . . . . . . . . . . . . . . 2-45
Figure 2-25: Symbol table display-reverse link . . . . . . . . . . . . . . . . . . . . 2-46
Figure 2-26: Code domain power measurement-reverse link . . . . . . . . 2-47
Figure 2-27: Pilot to code channel measurement-reverse link . . . . . . . . 2-51
Figure 2-28: Gated output power measurement . . . . . . . . . . . . . . . . . . . 2-55
Figure 2-29: Measurement limits editor . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Figure 2-30: ACPR measurement limits editor . . . . . . . . . . . . . . . . . . . . 2-60
Figure 2-31: Spectrum emission mask measurement limits editor . . . . 2-62
Figure 2-32: Gated output power measurement limits editor . . . . . . . . 2-64
WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual iii
List of Tables
List of Tables
Table 2-1: Measurement limits items . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Table 2-2: Measurement limit items for the ACPR measurement . . . . . 2-60
Table 2-3: Measurement limit items for the spectrum emission mask
measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-62
Table 2-4: Measurement limit items for the gated output power
measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-64
Table 2-5: Forward link common limits . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Table 2-6: Reverse link common limits . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Table 2-7: Forward link: all band classes . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Table 2-8: Reverse link: all band classes . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Table 2-9: Forward link: BC (band class) 0, 2, 3, 5, and 9 . . . . . . . . . . . 2-69
Table 2-10: Forward link: BC (band class) 1, 4, and 8 . . . . . . . . . . . . . . 2-69
Table 2-11: Forward link: BC (band class) 3b . . . . . . . . . . . . . . . . . . . . . 2-70
Table 2-12: Forward link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . 2-70
Table 2-13: Forward link: BC (band class) 7 . . . . . . . . . . . . . . . . . . . . . . 2-71
Table 2-14: Reverse link: BC (band class) 0, 2, 3, 5, and 9 . . . . . . . . . . . 2-71
Table 2-15: Reverse link: BC (band class) 1, 4, and 8 . . . . . . . . . . . . . . . 2-72
Table 2-16: Reverse link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . . 2-72
Table 2-17: Reverse link: BC (band class) 7 . . . . . . . . . . . . . . . . . . . . . . . 2-73
Table 2-18: Forward and reverse link: BC (band class) 0, 1, 2, 3, 4, 5,
7, 8, and 9 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-73
Table 2-19: Forward link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . 2-74
Table 2-20: Reverse link: BC (band class) 6 . . . . . . . . . . . . . . . . . . . . . . . 2-74
Table 2-21: Reverse link: all band classes . . . . . . . . . . . . . . . . . . . . . . . . 2-75
Table 3-1: Measurement modes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 3-2: :CONFigure commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Table 3-3: :DISPlay commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Table 3-4: :FETCh commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-5: :MMEMory commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table 3-6: :READ commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table 3-7: :SENSe commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Table 3-8: :DISPlay command subgroups . . . . . . . . . . . . . . . . . . . . . . . . 3-17
Table 3-17: :SENSe command subgroups . . . . . . . . . . . . . . . . . . . . . . . . 3-75
iv WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual
List of Tables
Table A-1: cdma2000 forward link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Table A-2: cdma2000 reverse link . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-2
Table B-1: Factory default settings-:DISPlay commands . . . . . . . . . . . . B-1
Table B-2: Factory default settings-:SENSe commands . . . . . . . . . . . . . . B-2
Table C-1: Display format and scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . C-1
Table D-1: SCPI conformance information-:CONFigure commands . . . D-1
Table D-2: SCPI conformance information-:DISPlay commands . . . . . . D-1
Table D-3: SCPI conformance information-:FETCh commands . . . . . . D-3
Table D-4: SCPI conformance information-:MMEMory commands . . . D-3
Table D-5: SCPI conformance information-:READ commands . . . . . . . D-4
Table D-6: SCPI conformance information-:SENSe commands . . . . . . . D-4
WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual v
List of Tables
vi WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual
Preface
About This Manual
This manual provides operating instructions for the WCA230A & WCA280A
Portable Wireless Communication Analyzers Option 25 cdma2000 analysis
software.
This manual is composed of the following sections:
Getting Started provides a product description.
Operating Basics describes the measurement functions added by the option
and explains how to set up the analyzer for each measurement mode.
Syntax and Commands lists all command subsystems and describes all
programming commands.
Appendices provides additional information including specifications, factory
default settings, and SCPI conformance information.
Related Manuals
The following related documents are also available:
The WCA230A & WCA280A Portable Wireless Communication Analyzers
User Manual (Tektronix part number 071-1253-xx) contains a tutorials that
describes how to operate the analyzer. It also includes an in-depth discussion
on how to more completely use the analyzer features.
The WCA230A & WCA280A Portable Wireless Communication Analyzers
Programmer Manual (Tektronix part number 071-1255-xx) contains an
alphabetical listing of the programming commands and other information
related to controlling the analyzer over the GPIB interface.
WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual vii
Preface
viii WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual
Getting Started
Getting Started
Product Description
This section provides an overview of the product capabilities.
The WCA230A & WCA280A Wireless Communication Analyzers Option 25 is an
analysis software option that adds transmitter measurements capability for
cdma2000 forward link (3GPP2 C.S0010) and reverse link (3GPP2 C.S0011) to
the analyzers.
You can perform the following cdma2000 measurements:
Modulation accuracy
Code domain power
Channel power
OBW (occupied bandwidth)
ACPR (Adjacent channel power ratio)
Spectrum emission mask
Gated output power (reverse link only)
Intermodulation
CCDF
Pilot to code channel
In addition, the option provides pre-defined measurement limits for the ACPR,
spectrum emission mask, and gated output power measurements. Using these
measurement limits, you can easily check that the input signal meets the
specification.
WCA230A/WCA280A Option 25 cdma2000 Analysis Software User Manual 1-1
Getting Started
1-2 WCA230A/WCA280A Option 25 cdma2000 Analysis Software User Manual
Operating Basics
Functional Overview
This section provides an overview of the Option 25 measurement functions.
Figure 2-1 shows the measurement functions and how to access each measurement
function from the front-panel menu key.
Other option name
(if installed)
MODE
S/A
DEMOD
TIME
DEMOD
menu
Analog Demod
Digital Demod
Standard...
Standard
menu
cdma2000-Fwd
cdma2000-Rev
Measurement functions
added by Option 25
Modulation Accuracy
Code Domain Power
Channel Power
MEASURE
menu
MEASURE
menu
OBW
ACPR
Spectrum Emission Mask
Intermodulation
CCDF
Pilot to Code Channel
Modulation Accuracy
Code Domain Power
Channel Power
OBW
ACPR
Spectrum Emission Mask
Gated Output Power
Intermodulation
CCDF
Pilot to Code Channel
Figure 2-1: Menu diagram showing measurement functions available in Option 25
WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual 2-1
Functional Overview
Accessing a Measurement
Function
All of the measurement functions available in Option 25 can be selected from the
DEMOD (demodulation) mode.
Perform the following procedure to access any of the measurement functions:
1. Press the DEMOD menu key to open the DEMOD menu.
2. Press the Standard... side key to open the Standard menu.
3. Press the cdma2000-Fwd or cdma2000-Rev side key to open the MEASURE
menu for the standard.
4. Press one of the side keys to select the measurement that you want to perform.
If the desired measurement is not displayed on the current MEASURE menu,
press the Go to page 2 (of 2) side key to open the next page.
5. If needed, set frequency, span, and amplitude of the input signal.
Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for information on how to set frequency, span, and
amplitude.
2-2 WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual
cdma2000 Forward Link Measurements
This section describes the functions and features of the cdma2000 forward link
measurements. Each measurement description contains general information about
the measurement, descriptions of the measurement displays and functions available
through menu selections.
The information is divided into the following subsections:
Modulation accuracy measurement
Code domain power measurement
Channel power measurement
OBW measurement
ACPR measurement
Spectrum emission mask measurement
Intermodulation measurement
CCDF measurement
Pilot to code channel measurement
NOTE. If you are not familiar with the operation of the WCA230A/WCA280A, refer
to the WCA230A & WCA280A Portable Wireless Communication Analyzers User
Manual before reading this section.
WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual 2-3
cdma2000 Forward Link Measurements
Modulation Accuracy Measurement
The modulation accuracy measurement measures Rho (ratio of the correlated
power to the total power), EVM (Error Vector Magnitude), magnitude error, phase
error, frequency error, and origin offset. Figure 2-2 shows an example of the
modulation accuracy measurement.
Figure 2-2: Modulation accuracy measurement
2-4 WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual
cdma2000 Forward Link Measurements
Display Elements
Setting the Timing
Parameters
The following information is shown in the modulation accuracy measurement
display:
Overview: This view can contain power versus time or spectrogram.
Subview: This view can contain spectrum, EVM, magnitude error, phase
error, IQ power graph, and constellation.
Main view: This view can contain modulation accuracy, EVM, magnitude
error, phase error, and symbol table.
The display contents in each view can be changed using the VIEW DEFINE menu.
Refer to Changing the View Contents on page 2-7 for more information about the
VIEW DEFINE menu.
You can set the following timing parameters using the TIMING menu. Press the
TIMING key to open the TIMING menu.
Acquisition Length (chips): Sets the acquisition length in chips. The range
depends on the acquisition memory size and the span setting.
Acquisition Length (s): Displays the acquisition length in seconds.
Acquisition History: Specifies the number of the block to display and
analyze. The latest block is number zero. Older blocks have larger negative
numbers.
Analysis Interval: Sets the analysis interval in chips. The range depends on
the acquisition length setting.
Analysis Offset: Sets the start point of the analysis with respect to the left end
of the acquisition length in chips.
Spectrum Length: Displays the time length for FFT processing of the
spectrum displayed in the subview. This value is equivalent to one frame
acquisition length.
Spectrum Offset: Sets the beginning of Spectrum Length with respect to the
left end of the acquisition length.
NOTE. Refer to the WCA230A & WCA280A Portable Wireless Communication
Analyzers User Manual for detailed information about the timing parameters.
WCA230A & WCA280A Option 25 cdma2000 Analysis Software User Manual 2-5
cdma2000 Forward Link Measurements
Setting the Measurement
Parameters
You can set the following measurement parameters using the MEAS SETUP
menu. Press the MEAS SETUP key to open the MEAS SETUP menu.
Analyze: Performs analysis for the time slots in the analysis range.
Measurement Level: Selects the measurement level for the measurement.
You can select Chip (chip level) or Symbol (symbol level).
Radio Configuration...: Selects the radio configuration for the measurement.
You can select RC1/RC2 or RC3/RC4/RC5.
PN Offset: Sets the PN offset in units of 64 chips. You can set the value from
0 to 511.
Select PCG: Sets the PCG (power control group) for the measurement.
Select Code: Sets the code in the PCG for the measurement. This setting is
only available when Measurement Level is set to Symbol.
Limits...: Sets the pass/fail limits for the modulation accuracy measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-57 for more information.
Active Channel Threshold: Sets the active channel threshold level (in dB
from the pilot) used for deciding whether a code channel is active or inactive.
You can set the value from -50 dB to 50 dB.
IQ Swap: Sets whether to swap the I and Q data streams before demodulation.
Measurement Filter...: Selects the measurement filter to apply when
calculating EVM and other modulation accuracy results. You can select None,
cdma2000, or cdma2000+EQ (equalizer).
Walsh Code Length...: Selects the Walsh code length. You can select
Composite, 64, 32, 16, 8, 4, or 2. This setting is only available when
Measurement Level is set to Symbol and Radio Configuration is set to
RC3/RC4/RC5. When Radio Configuration is set to RC1/RC2, the Walsh code
length is fixed at 64 and cannot be changed by the user.
QOF: Sets the Walsh code quasi-orthogonal function. The choices are 0, 1, 2,
or 3. This setting is only available when Measurement Level is set to Symbol
and Radio Configuration is set to RC3/RC4/RC5.
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Changing the View
Contents
You can change the view contents in the overview, subview, and main view using
the VIEW DEFINE menu. Press the DEFINE key to display the VIEW DEFINE
menu.
Show Views: Selects the view style on the screen. You can select Single or
Multi.
Overview Content...: Selects a view to display in the overview. You can
select Spectrogram or Waveform (power versus time).
Subview Content...: Selects a view to display in the subview:
Spectrum: Displays spectrum of the measured signal.
EVM: Displays changes of EVM (Error Vector Magnitude) over time.
MagErr: Displays changes of magnitude error over time.
PhaseErr: Displays changes of phase error over time.
IQ Power Graph: Displays the code domain power for each symbol.
Refer to IQ Power Graph Display on page 2-21.
Constellation: Displays the signal as an I-Q constellation.
Mainview Content...: Selects a view to display in the main view. You can
select Modulation Accuracy, EVM, MagErr, PhaseErr, or Symbol Table. Refer
to Scale and Format in the Main View on page 2-8 for more information about
the views.
Menu Off: Hides the side menu. To display the menu again, press the MENU
side key or VIEW:DEFINE key.
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Scale and Format in the
Main View
This subsection describes the scale settings and display format in the main view.
Modulation Accuracy Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Modulation Accuracy from the Mainview Content
submenu, an IQ rectangular graph and the measured value for Rho, peak code
domain error, rms and peak EVM, magnitude error, phase error, frequency error,
IQ origin offset, and Tau are displayed (see Figure 2-3). The peak code domain
error is displayed only when the Measurement Level menu item is set to Symbol,
and Tau is displayed only when an external trigger signal is applied.
IQ rectangular graph
(Vector display)
Figure 2-3: Modulation accuracy display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Measurement Content...: Selects vector or constellation display.
Ve ct or: Selects vector display. A signal represented with phase and amplitude
is displayed in rectangular (I and Q) coordinates. The red point indicates the
symbol position on the measured signal and the yellow trace indicates the locus
of the signal between symbols.
Constellation: Selects constellation display. It is the same as the vector
display, except that only symbols of the measured signal are indicated in red,
and the locus between symbols is not shown. The cross marks indicate symbol
positions of an ideal signal.
NOTE. I and Q signals are normalized to prevent the scale from changing when
signal attenuation changes.
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EVM Display. When you select Mainview Content from the VIEW DEFINE menu
and then select EVM from the Mainview Content submenu, changes of EVM
(Error Vector Magnitude) over time are displayed for each chip or symbol (see
Figure 2-4).
Symbol number
Horizontal Start
Code length and channel number
Vertical Sca le
Vertical Start
Horizontal Scale
Figure 2-4: EVM display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis to display the
entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Start: Sets the minimum (bottom) value of the vertical axis.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.
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MagErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select MagErr from the Mainview Content submenu, changes of
magnitude error over time are displayed for each chip or symbol (see
Figure 2-5).
Symbol number
Horizontal Start
Code length and channel number
Vertical Scale
Horizontal Scale
Figure 2-5: MagErr display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Offset: Sets the offset value of the vertical axis. You can set the value
from -200% to 200%.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.
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PhaseErr Display. When you select Mainview Content from the VIEW DEFINE
menu and then select PhaseErr from the Mainview Content submenu, changes of
phase error over time are displayed for each chip or symbol (see Figure 2-6).
Symbol number
Horizontal Start
Code length and channel number
Vertical Scale
Horizontal Scale
Figure 2-6: PhaseErr display
You can set the scale of the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Auto Scale: Sets the start value and the scale of the vertical axis automatically
to display the entire waveform.
Horizontal Scale: Sets the scale of the horizontal axis (number of chips or
symbols).
Horizontal Start: Sets the chip number or symbol number of the first (left)
value of the horizontal axis.
Vertical Scale: Sets the scale of the vertical axis.
Vertical Offset: Sets the offset value of the vertical axis. You can set the value
from -450 to 450 degrees.
Full Scale: Sets the scale of vertical axis to the default full-scale value.
Measurement Content...: Selects the display content in the main view. You
can select EVM, MagErr, or PhaseErr. This selection can also be made from
Mainview Content in the VIEW DEFINE menu.
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Symbol Table Display. When you select Mainview Content from the VIEW
DEFINE menu and then select Symbol Table from the Mainview Content
submenu, the symbol table is displayed (see Figure 2-7). This display is only
available when the Measurement Level menu item is set to Symbol.
Symbol number
Code length and channel number
Figure 2-7: Symbol table display
You can set the radix for the display using the VIEW SCALE menu. Press the
SCALE key to open the menu.
Radix...: Sets the radix for displaying the table. You can select Hex
(hexadecimal), Oct (octal), or Bin (binary).
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