User Manual
WCA230A & WCA280A Option 27
3GPP Release 5 Downlink (HSDPA) Analysis
Software
071-1509-02
This document supports firmware version 3.30 and above.
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P.O . B ox 5 0 0
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USA
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Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year
from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option,
either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange
for the defective product. Parts, modules and replacement products used by Tektronix for warranty work may be new
or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges
prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country
in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties,
taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to
repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or
malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modified or integrated
with other products when the effect of such modification or integration increases the time or difficulty of servicing the
product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE
REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS
VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF
THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1ix
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1ix
Related Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1ix
Getting Started
Analysis Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Measurement Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Operating Basics
Uplink/Downlink Analysis in the S/A Mode . . . . . . . . . . . . . . . . . . . . . . . 2-1
Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-2
Channel Power Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
ACLR Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-5
Multi-Carrier ACLR Measurement
Downlink Analysis Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Spectrum Emission Mask Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-9
OBW Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
EBW Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Carrier Frequency Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Editing the Measurement Limits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Downlink Analysis in the Demod Mode . . . . . . . . . . . . . . . . . . . . . . . . . . 2-21
Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Measurement Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Scale and Format of View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Code Domain Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Power Codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Code Power versus Time Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-35
Code Power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Symbol Constellation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39
Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
Symbol Eye Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42
Symbol Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43
Modulation Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44
Uplink Analysis in the Demod Mode . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46
Measurement Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-48
Display Method for HS-DPCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-51
Scale and Format of View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
Code Domain Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Power Codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Code Power versus Time Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Code Power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Symbol Constellation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65
Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66
WCA230A & WCA280A Option 27 User Manual
i
Table of Contents
Syntax and Commands
Symbol Eye Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Symbol Table. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69
Modulation Accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-70
ACK/NACK Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71
Command Groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-1
Functional Groups. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
:CONFigure Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
:DISPlay Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
:FETCh Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
:MMEMory Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
:READ Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
:SENSe Commands. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
:CONFigure Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-9
:DISPlay Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
:FETCh Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-53
:MMEMory Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-77
:READ Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-81
:SENSe Commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95
Appendices
Index
Factory Default Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
GPIB Command Defaults . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Measurement Limit Defaults. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Scale Setting Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
ii
WCA230A & WCA280A Option 27 User Manual
List of Figures
List of Figures
Figure 1-1: Measurement menus for the 3GPP-R5 analysis . . . . . . . . . . . . . . . . . 1-5
Figure 2-1: Measurement menu in the S/A mode . . . . . . . . . . . . . . . . . . . . . . . . . 2-1
Figure 2-2: Channel power measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Figure 2-3: 3GPP-R5 ACLR measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-6
Figure 2-4: 3GPP-R5 ACLR measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-8
Figure 2-5: Spectrum emission mask measurement . . . . . . . . . . . . . . . . . . . . . . 2-10
Figure 2-6: OBW measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-11
Figure 2-7: EBW measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-12
Figure 2-8: Carrier frequency measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Figure 2-9: Measurement limits editor . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Figure 2-10: Spectrum emission mask measurement limits editor . . . . . . . . . . 2-16
Figure 2-11: Downlink analysis measurement menu in the Demod mode . . . . . 2-21
Figure 2-12: Example of the code domain power measurement . . . . . . . . . . . . 2-24
Figure 2-13: Time slot table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Figure 2-14: Code domain power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Figure 2-15: Power codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-33
Figure 2-16: Code domain power versus Time slot . . . . . . . . . . . . . . . . . . . . . . . 2-35
Figure 2-17: Code domain power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . 2-37
Figure 2-18: Symbol constellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39
Figure 2-19: Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-40
Figure 2-20: Symbol eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-42
Figure 2-21: Symbol table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-43
Figure 2-22: Modulation accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44
Figure 2-23: Uplink analysis measurement menu in the Demod mode . . . . . . . 2-45
Figure 2-24: Example of the code domain power measurement . . . . . . . . . . . . 2-47
Figure 2-25: Subframe offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
Figure 2-26: HS-DPCCH display method (Code domain power) . . . . . . . . . . . . 2-51
Figure 2-27: HS-DPCCH display method (Code power versus Symbol) . . . . . . 2-52
Figure 2-28: HS-DPCCH display method (ACK/NACK analysis) . . . . . . . . . . . 2-53
Figure 2-29: Time slot table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
Figure 2-30: Code domain power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Figure 2-31: Power codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Figure 2-32: Code domain power versus Time slot . . . . . . . . . . . . . . . . . . . . . . . 2-61
Figure 2-33: Code domain power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Figure 2-34: Symbol constellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-65
Figure 2-35: Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-66
Figure 2-36: Symbol eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-68
Figure 2-37: Symbol table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-69
Figure 2-38: Modulation accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-70
Figure 2-39: ACK/NACK . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-71
WCA230A & WCA280A Option 27 User Manual
iii
List of Tables
List of Tables
Table 1-1: Additional functions in Option 27 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 1-2: 3GPP-R5 downlink transmission parameters . . . . . . . . . . . . . . . . . . . . 1-2
Table 1-3: 3GPP-R5 uplink transmission parameters . . . . . . . . . . . . . . . . . . . . . . 1-3
Table 2-1: Measurement limits settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-15
Table 2-2: Limit settings for the spectrum emission mask measurement . . . . . . 2-17
Table 2-3: Vertical scale setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41
Table 2-4: Vertical scale setting range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-67
Table 3-1: Measurement modes added in Option 27 . . . . . . . . . . . . . . . . . . . . . . . 3-1
Table 3-2: List of command groups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Table 3-3: :CONFigure commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-2
Table 3-4: :DISPlay commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-3
Table 3-5: :FETCh commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-4
Table 3-6: :MMEMory commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table 3-7: :READ commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-5
Table 3-8: :SENSe commands . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-6
Table 3-9: :DISPlay command subgroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-15
Table 3-10: Symbol rate settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-21
Table 3-11: Main view display formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-25
Table 3-12: Symbol rate settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-40
Table 3-13: Main view display formats . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-44
Table 3-14: Queried information on the 3GPP-R5 downlink analysis results . . 3-55
Table 3-15: Queried information on the 3GPP-R5 uplink analysis results . . . . 3-72
Table 3-16: :SENSe command subgroups . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3-95
iv
Table A-1: Factory initialization settings, :DISPlay commands . . . . . . . . . . . . . A-1
Table A-2: Factory initialization settings, :SENSe commands . . . . . . . . . . . . . . A-2
Table A-3: Common limits (Band I, II, and III) . . . . . . . . . . . . . . . . . . . . . . . . . . A-3
Table A-4: SEM limits in Band I and III . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Table A-5: SEM limits in Band II . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-4
Table B-1: Display format and scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
WCA230A & WCA280A Option 27 User Manual
Preface
About This Manual
Related Manuals
This manual provides operating instructions for the WCA230A and WCA280A
Portable Wireless Communication Analyzers Option 27 3GPP Release 5 Downlink
(HSDPA) analysis software.
This manual is composed of the following sections:
Getting Started describes the overview of the 3GPP Release 5 analysis.
Operating Basics explains the menu functions and measurement procedures.
Syntax and Commands describes GPIB commands for Option 27.
Appendix provides additional information including factory default settings
and scale setting range.
The following related documents are also available:
The WCA230A & WCA280A Portable Wireless Communication Analyzers
User Manual (Tektronix part number 071-1253-xx) contains a tutorial to
quickly describe how to operate the analyzer. It also includes an in-depth
discussion on how to more completely use the analyzer features.
The WCA230A & WCA280A Portable Wireless Communication Analyzer
Programmer Manual (Tektronix part number 071-1255-xx) contains an
alphabetical listing of the programming commands and other information
related to controlling the analyzer over the GPIB interface.
WCA230A & WCA280A Option 27 User Manual
v
Preface
vi
WCA230A & WCA280A Option 27 User Manual
Getting Started
Getting Started
The WCA230A and WCA280A Option 27 3GPP Release 5 Downlink (HSDPA)
analysis software enables modulation analysis of HSDPA (High Speed Downlink
Packet Access) signals defined in 3GPP (3
rd
Generation Partnership Project)
Release 5 (“3GPP-R5”). Measurements may be performed on downlink QPSK and
16QAM or uplink BPSK signals.
Table 1-1 summarizes the functions added in Option 27 by the measurement modes
of the analyzer.
Table 1-1: Additional functions in Option 27
Measurement mode Additional functions
S/A (spectrum analysis) 3GPP-R5 downlink/uplink analysis
Channel power
ACLR (Adjacent Channel Leakage Power Ratio)
MC-ACLR (Multi-Carrier ACLR, downlink analysis only)
Spectrum emission Mask
OBW (Occupied Bandwidth)
EBW (Emission Bandwidth)
Carrier frequency
Demod (modulation analysis) 3GPP-R5 downlink/uplink analysis
Code domain power
Power codogram
Code power versus Time slot
Code power versus Symbol
Symbol constellation
Symbol EVM (Error Vector Magnitude)
Symbol eye diagram
Symbol table
Modulation accuracy
ACK/NACK analysis (uplink analysis only)
Time (time analysis) None
NOTE.
The ACK/NACK analysis requires Option 23 W-CDMA Uplink Analysis
Software.
WCA230A & WCA280A Option 27 User Manual
1-1
Getting Started
Analysis Definition
The analyzer performs measurements according to 3GPP-R5 specifications.
Downlink Analysis
Table 1-2 shows the 3GPP-R5 downlink transmission parameters for the analyzer.
Table 1-2: 3GPP-R5 downlink transmission parameters
Item Description
Chip rate 3.84 Mcps
Symbol rate 7.5, 15, 30, 60, 120, 240, 480, and 960 ksps
Maximum number of channels 512
Frame structure Time slot: 666.7
Scrambling code Gold code using M series by generator polynomial 18 bits
Channelization code Hierarchical orthogonal code series based on the
combination of chip rate and symbol rate
Modulation method for each channel QPSK or 16QAM
Baseband filter Root-cosine with
Can be set in the range of 0.0001
Measurement Functions.
Code domain power: Measures the power relative to the total power for each
The analyzer has the following measurement functions:
µ
s
α
= 0.22 (default)
≤α ≤
1
channel. Multi-rate is supported and up to 512 channels can be measured.
Code domain power versus Time: Measures the relative power at symbol points
for each channel in time series.
1-2
Power codogram: Measures the code domain power continuously for up to
150 slots (0.1 sec) and displays a spectrogram for each slot.
Vector/Constellation: Measures the vector loci and chip points for all signals
as well as constellation at symbol points for each channel.
Modulation accuracy: Measures EVM (Error Vector Magnitude), amplitude
and phase errors, waveform quality, and origin offset for each channel.
Measures PCDE (Peak Code Domain Error), amplitude, frequency, and phase
errors; waveform quality; and origin offset for each time slot.
WCA230A & WCA280A Option 27 User Manual
Getting Started
Uplink Analysis
Measurement Process.
The following steps show the internal process for the
3GPP-R5 downlink analysis:
1. Perform flatness correction and filtering.
2. Establish the synchronization with P-SCH.
3. Determine the range of scrambling code numbers with S-SCH.
4. Fix the scrambling code number and the phase.
5. Correct the frequency and the phase.
6. Perform high-speed Hadamard transformation.
7. Calculate the power for each symbol on all channels.
The analyzer supports the following types of 3GPP-R5 uplink signals:
DPDCH (Dedicated Physical Data Channel)
DPCCH (Dedicated Physical Control Channel)
HS-DPCCH (Dedicated Physical Control Channel for High-Speed
Downlink Shared Channel (HS-DSCH))
The analyzer covers the 3GPP-R5 uplink transmission parameters listed in
Tab le 1-3 .
Table 1-3: 3GPP-R5 uplink transmission parameters
Item DPDCH DPCCH HS-DPCCH
Chip rate 3.84 Mcps
Symbol rate 15, 30, 60, 120, 240,
480, and 960 ksps
Maximum number of
channels
Frame structure 15 time-slots, 10 ms 15 time-slots, 10 ms 5 sub-frames, 10 ms
Time slot 2560 chips, 667
Scrambling code Long or short. Number: 0 to 16,777,215
Modulation method for
each channel
Baseband filter Root-cosine with
611
Can be set in the range of 0.0001
15 ksps 15 ksps
µ
s
BPSK
α
= 0.22 (default).
≤α ≤
1
WCA230A & WCA280A Option 27 User Manual
1-3
Getting Started
Measurement Functions.
ACK/NACK analysis: Measures the HS-DPCCH to detect and display the
The analyzer has the following measurement functions:
ACK/NACK indicator, DTX (Discontinuous Transmission), and CQI (Channel
Quality Indicator).
Code domain power: Measures the power relative to the total power for each
channel. Multi-rate is supported and up to 512 channels can be measured.
Power codogram: Measures the code domain power continuously for up to
150 slots (0.1 sec) and displays spectrogram for each slot.
NOTE.
The code domain power and the power codogram can be displayed in the
subview only.
Measurement Process.
The following steps show the internal process for the
3GPP-R5 uplink analysis:
1. Perform flatness correction and filtering.
2. Search for a synchronous point by de-spreading DPCCH.
3. Correct the frequency and phase.
4. Obtain symbols for each channel of DPDCH and DPCCH, and calculate power
for each symbol.
NOTE.
using the frequency and phase to establish synchronization. If the level of DPCCH
or the control part is much lower than (about 1/10
The analyzer de-spreads DPCCH and the control part of an input signal,
th
) the level of the other channels
(DPDCH or the data part), the analysis may not be performed accurately.
1-4
WCA230A & WCA280A Option 27 User Manual
Measurement Menu
Getting Started
Figure 1-1 shows the measurement menus related to the 3GPP-R5 analysis.
MODE
S/A
DEMOD
TIME
Measure menu items
Standard... 3GPP-R5-DL * Channel Power
3GPP-R5-UL *
Standard... 3GPP-R5-DL * Code Domain Power
3GPP-R5-UL * Code Domain Power
ACLR
Spectrum Emission Mask
OBW
EBW
Carrier Frequency
MC-ACLR
Channel Power
ACLR
Spectrum Emission Mask
OBW
EBW
Carrier Frequency
Power Codogram
Code Power versus Time Slot
Code Power versus Symbol
Symbol Constellation
Symbol EVM
Symbol Eye Diagram
Symbol Table
Modulation Accuracy
Power Codogram
Code Power versus Time Slot
Code Power versus Symbol
Symbol Constellation
Symbol EVM
Symbol Eye Diagram
Symbol Table
Modulation Accuracy
ACK/NACK Analysis
Figure 1-1: Measurement menus for the 3GPP-R5 analysis
For the CCDF (Complementary Cumulative Distribution Function) analysis in
Time mode, refer to the WCA230A and WCA280A User Manual (Tektronix part
number 071-1253-XX).
NOTE.
If you are not familiar with the operation of the analyzer, refer to the
WCA230A and WCA280A User Manual (Tektronix part number 071-1253-XX).
WCA230A & WCA280A Option 27 User Manual
CCDF
(Standard)
* DL and UL represent downlink and uplink, respectively.
1-5
Getting Started
1-6
WCA230A & WCA280A Option 27 User Manual
Operating Basics
Uplink/Downlink Analysis in the S/A Mode
This section describes the basic operation of 3GPP-R5 uplink/downlink analysis in
the S/A (Spectrum Analysis) mode. You can access the measurement items by
pressing S/A →Standard... →3GPP-R5-DL (downlink) or 3GPP-R5-UL
(uplink) as shown in Figure 2-1.
MODE
S/A
DEMOD
TIME
Standard... 3GPP-R5-DL * Channel Power
3GPP-R5-UL *
* DL and UL represent downlink and uplink, respectively.
Measure menu items
ACLR
Spectrum Emission Mask
OBW
EBW
Carrier Frequency
MC-ACLR
Channel Power
ACLR
Spectrum Emission Mask
OBW
EBW
Carrier Frequency
Figure 2-1: Measurement menu in the S/A mode
WCA230A & WCA280A Option 27 User Manual
2-1
Uplink/Downlink Analysis in the S/A Mode
Measurement Procedure
Use the following procedure to take a spectrum measurement in S/A mode.
NOTE.
For details on setting frequency, span, and amplitude, refer to the
WCA230A and WCA280A User Manual (Tektronix part number 071-1253-XX).
1. Press the S/A key on the front panel.
2. Press the side key: Standard... →3GPP-R5-DL (for downlink) or
3GPP-R5-UL (for uplink).
3. Press the FREQUENCY/CHANNEL key on the front panel to set frequency.
If you use the channel table, do these steps:
Press the Channel Table... side key and select W-CDMA-DL (for
downlink) or W-CDMA-UL (for uplink).
Press the Channel side key and select a channel by turning the general
purpose knob.
The center frequency is set to the value corresponding to the channel.
4. Press the SPAN key on the front panel and set span.
5. Press the AMPLITUDE key on the front panel and set amplitude
appropriately.
NOTE.
If the input level is too high, A/D OVERFLOW displays in the red box at the
center top of the screen. If this occurs, raise the reference level.
2-2
6. Press the MEASURE key on the front panel and select a measurement item:
Channel Power
ACLR (Adjacent Channel Leakage Power Ratio)
Spectrum Emission Mask
OBW (Occupied Bandwidth)
EBW (Emission Bandwidth)
Carrier Frequency
MC-ACLR (Multi-Carrier ACLR, downlink analysis only)
NOTE.
Refer to the WCA230A and WCA280A User Manual for information on
scaling the views.
The following sections explain each measurement.
WCA230A & WCA280A Option 27 User Manual
Channel Power Measurement
The channel power measurement measures the channel power within a specified
bandwidth and the power spectral density in dBm/Hz.
After selecting Channel Power in the procedure described on page 2-2, set the
parameters in the Meas Setup menu as follows.
Uplink/Downlink Analysis in the S/A Mode
Measurement Setup Menu
The Meas Setup menu for the channel power measurement contains the following
controls:
Channel Bandwidth.
Sets the frequency range for the measurement using the band
power marker (see Figure 2-2). Range: 50 kHz to 20 MHz (default: 3.84 MHz).
Measurement Filter Shape...
Rect (Rectangular, default)
Gaussian
Nyquist
Root Nyquist
Rolloff Ratio.
Sets the roll-off ratio when the Measurement Filter Shape is
Selects the filter to be used for the measurement:
Nyquist or Root Nyquist. Range: 0.0001 to 1 (default: 0.5).
Limits...
Sets the pass/fail limit for the channel power measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-14 for more information.
WCA230A & WCA280A Option 27 User Manual
2-3
Uplink/Downlink Analysis in the S/A Mode
Figure 2-2 shows an example of the channel power measurement.
Channel Bandwidth
Figure 2-2: Channel power measurement
2-4
WCA230A & WCA280A Option 27 User Manual
ACLR Measurement
Uplink/Downlink Analysis in the S/A Mode
The ACLR (Adjacent Channel Leakage Power Ratio) measurement according to
the 3GPP-R5 standard is based on the ACPR measurement function in the normal
spectrum analysis. For the basics, refer to ACPR Measurement in the WCA230A
and WCA280A User Manual.
The following settings are fixed according to the 3GPP-R5 standard:
Span: 25 MHz
Main channel measurement bandwidth (Main Chan BW): 3.84 MHz
Adjacent channel measurement bandwidth (Adj Chan BW): 3.84 MHz
Channel spacing (Chan Spacing): 5 MHz
After selecting ACLR in the procedure described on page 2-2, set the parameters
in the Meas Setup menu as follows.
Measurement Setup Menu
The Meas Setup menu for the ACLR measurement contains the following controls:
Measurement Filter Shape...
Rect (rectangle)
RootNyquist (Root Nyquist, default)
Rolloff Ratio.
Range: 0.0001 to 1 (default: 0.22)
2nd Adj Channel Gain.
normally much smaller than the main channel, measurement with the same gain
causes a larger error. To enhance accuracy, raise the gain of the second adjacent
channel inside the analyzer. Set the gain value here.
Range: 3 to 15 dB (default: 5 dB)
NOTE.
amplitude settings and/or calibration results. This gain setting does not affect the
waveform display.
Limits...
side key, the measurement limits editor appears. Refer to Editing the Measurement
Limits on page 2-14 for more information.
Sets the roll-off value when the filter is Root Nyquist.
The upper limit of the range may be smaller than 15 dB, depending on
Sets the pass/fail limit for the ACLR measurement. When you press this
Selects a filter shape:
Because the power of the second adjacent channel is
NOTE.
same limits setting.
WCA230A & WCA280A Option 27 User Manual
The ACLR measurement and the multi-carrier ACLR measurement use the
2-5
Uplink/Downlink Analysis in the S/A Mode
Figure 2-3 shows an example of the ACLR measurement. Measured values are
displayed in the lower part of the screen.
Main Upper1 Upper2Lower1Lower2
Figure 2-3: 3GPP-R5 ACLR measurement
2-6
WCA230A & WCA280A Option 27 User Manual
Multi-Carrier ACLR Measurement
Downlink Analysis Only
The multi-carrier ACLR (Adjacent Channel Leakage Power Ratio) measurement is
performed according to the 3GPP-R5 standard. You can measure the power levels
of up to four carriers and the ratio of each adjacent channel (a total of four channels)
to the power of the main channel. The measurement is based on the ACPR
measurement function in the normal spectrum analysis. For the basics, refer to
ACPR Measurement in the WCA230A and WCA280A User Manual.
The following settings are fixed according to the 3GPP-R5 standard:
Span: 55 MHz
Main channel measurement bandwidth (Main Chan BW): 3.84 MHz
Adjacent channel measurement bandwidth (Adj Chan BW): 3.84 MHz
Channel spacing (Chan Spacing): 5 MHz
After selecting MC-ACLR in the procedure described on page 2-2, set the
parameters in the Meas Setup menu as follows.
Uplink/Downlink Analysis in the S/A Mode
Measurement Setup Menu
The Meas Setup menu for the multi-carrier ACLR measurement contains the
following controls:
Carrier Threshold.
is indicated by a horizontal line in blue as shown in Figure 2-4.
Range: −30 to −1 dBc relative to the power of the main channel (default: −10 dBc).
Measurement Filter Shape...
Rect (Rectangular)
Root Nyquist (default)
Rolloff Ratio.
Range: 0.0001 to 1 (default: 0.22)
Limits...
When you press this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-14 for more information.
NOTE.
same limits setting.
Sets the pass/fail limit for the multi-carrier ACLR measurement.
The ACLR measurement and the multi-carrier ACLR measurement use the
Sets the threshold level to detect the carrier. The threshold level
Selects a filter shape.
Sets the roll-off value when the filter is Root Nyquist.
WCA230A & WCA280A Option 27 User Manual
2-7
Uplink/Downlink Analysis in the S/A Mode
Figure 2-4 shows an example of the multi-carrier ACLR measurement. There are
four carriers. On the bottom of the screen, the measurement results of the channel
power and ACLR are displayed. The channel at the center frequency (Ch 2 in this
case) is the main channel, which is indicated as “Main” in green in the
measurement results. The all channels are located at 5 MHz intervals according to
the standard.
Ch1 Ch2 Ch3 Ch4
Carrier Threshold
Measurement results
adjacent
channels
P (Pass) / F (Fail)
CarriersLower
Figure 2-4: 3GPP-R5 ACLR measurement
NOTE.
If there is no carrier in the main channel, the error message “No carrier”
will appear.
Upper
adjacent
channels
Main channel
2-8
If there are more than four carriers in the span, the error message “Too many
carriers” will appear.
WCA230A & WCA280A Option 27 User Manual
Spectrum Emission Mask Measurement
The spectrum emission mask measurement verifies that the base station is not
transmitting excessive power outside of its designated channel.
Uplink/Downlink Analysis in the S/A Mode
Measurement Setup Menu
NOTE.
When performing this measurement, be sure to apply a continuous active
slot signal or a continuous idle slot signal.
After selecting Spectrum Emission Mask in the procedure described on page 2-2,
set the parameters in the Meas Setup menu as follows.
The Meas Setup menu for the spectrum emission mask measurement contains the
following controls:
Ref. Channel Select.
Auto. The level is determined automatically by evaluating the spectrum trace.
Man. The level is set by the Ref. Channel Level just below.
Ref. Channel Level.
Selects how to determine the reference channel level.
Sets the reference channel level to be used by the measurement
when Ref. Channel Select is set to Man. Range: −150 to 30 dBm (default: 0 dBm).
Channel Bandwidth.
Defines the frequency window occupied by the
reference channel. Range: 1 to 10 MHz (default: 3.84 MHz).
Measurement Filter Shape...
Selects the filter shape to be used when measuring the
reference channel when Ref. Channel Select is set to Auto.
Rect (Rectangular, default)
Gaussian
Nyquist
Root Nyquist
Rolloff Ratio.
Sets the rolloff ratio when Measurement Filter Shape is set to
Nyquist or Root Nyquist. Range: 0.0001 to 1 (default: 0.5).
Limits...
Sets the pass/fail limit for the spectrum emission mask measurement.
When pressing this side key, the measurement limits editor appears. Refer to
Editing the Measurement Limits on page 2-14 for more information.
Scroll Table.
Step Size.
Scrolls the results table on screen using the general purpose knob.
Sets the step size for the Channel Bandwidth setting.
WCA230A & WCA280A Option 27 User Manual
2-9
Uplink/Downlink Analysis in the S/A Mode
Figure 2-5 shows an example of the spectrum emission mask measurement.
Defined by the measurement limits editor
(from the left)
■
Zone (A to E)
■
Side (upper or lower)
■
Start frequency of the zone
■
Stop frequency of the zone
■
MBW (Measurement Bandwidth (RBW))
Measurement results (P: Pass; F: Fail)
(from the left)
■
Absolute peak value and Pass/Fail
■
Relative peak value and Pass/Fail
Figure 2-5: Spectrum emission mask measurement
2-10
WCA230A & WCA280A Option 27 User Manual
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