Tektronix RSA3408A User Manual
User Manual
RSA3408A Option 40
3GPP Release 6 (HSUPA) Analysis Software
071-2060-00
This document supports firmware version 3.30 and above.
www.tektronix.com
Copyright © Tektronix. 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 . B o x 5 0 0
Beaverton, OR 97077
USA
For product information, sales, service, and technical support:
In North America, call 1-800-833-9200.
Worldwide, visit www.tektronix.com to find contacts in your area.
Warranty 2
Tektronix warrants that this product will be free from defects in materials and workmanship for a period of one (1) year
from the date of shipment. If any such product proves defective during this warranty period, Tektronix, at its option,
either will repair the defective product without charge for parts and labor, or will provide a replacement in exchange
for the defective product. Parts, modules and replacement products used by Tektronix for warranty work may be new
or reconditioned to like new performance. All replaced parts, modules and products become the property of Tektronix.
In order to obtain service under this warranty, Customer must notify Tektronix of the defect before the expiration of
the warranty period and make suitable arrangements for the performance of service. Customer shall be responsible for
packaging and shipping the defective product to the service center designated by Tektronix, with shipping charges
prepaid. Tektronix shall pay for the return of the product to Customer if the shipment is to a location within the country
in which the Tektronix service center is located. Customer shall be responsible for paying all shipping charges, duties,
taxes, and any other charges for products returned to any other locations.
This warranty shall not apply to any defect, failure or damage caused by improper use or improper or inadequate
maintenance and care. Tektronix shall not be obligated to furnish service under this warranty a) to repair damage
resulting from attempts by personnel other than Tektronix representatives to install, repair or service the product; b) to
repair damage resulting from improper use or connection to incompatible equipment; c) to repair any damage or
malfunction caused by the use of non-Tektronix supplies; or d) to service a product that has been modified or integrated
with other products when the effect of such modification or integration increases the time or difficulty of servicing the
product.
THIS WARRANTY IS GIVEN BY TEKTRONIX WITH RESPECT TO THE PRODUCT IN LIEU OF ANY OTHER
WARRANTIES, EXPRESS OR IMPLIED. TEKTRONIX AND ITS VENDORS DISCLAIM ANY IMPLIED
WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. TEKTRONIX’
RESPONSIBILITY TO REPAIR OR REPLACE DEFECTIVE PRODUCTS IS THE SOLE AND EXCLUSIVE
REMEDY PROVIDED TO THE CUSTOMER FOR BREACH OF THIS WARRANTY. TEKTRONIX AND ITS
VENDORS WILL NOT BE LIABLE FOR ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL
DAMAGES IRRESPECTIVE OF WHETHER TEKTRONIX OR THE VENDOR HAS ADVANCE NOTICE OF
THE POSSIBILITY OF SUCH DAMAGES.
Table of Contents
Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
About This Manual . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Related Manuals. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Getting Started
Getting Started . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Analysis Definition . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-2
Measurement Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-5
Operating Basics
Downlink Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-3
Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-4
Measurement Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-7
Scale and Format of View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-10
Code Domain Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Power Codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Code Power versus Time Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Code Power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Symbol Constellation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Symbol Eye Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Symbol Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Modulation Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Modulation Accuracy versus Time Slot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-28
Uplink Analysis . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-31
Measurement Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-32
Measurement Setup Menu . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-34
Display Method for HS-DPCCH . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Scale and Format of View . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-41
Code Domain Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46
Power Codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-48
Code Power versus Time Slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
Code Power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-52
Symbol Constellation. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Symbol Eye Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Symbol Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Modulation Accuracy. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Modulation Accuracy versus Time Slot. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-61
Gain Ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
RSA3408A Option 40 User Manual
i
Table of Contents
Appendices
Glossary and Index
Appendix A: Scale Setting Range . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
Appendix B: Saving Measurement Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Save Menu. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-1
Saved FIle Format . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
ii
RSA3408A Option 40 User Manual
List of Figures
List of Figures
Figure 1-1: Measurement menus for the 3GPP-R6 analysis . . . . . . . . . . . . . . . . . 1-5
Figure 2-1: Downlink analysis measurement menu in the Demod mode . . . . . . . 2-3
Figure 2-2: Code domain power measurement example . . . . . . . . . . . . . . . . . . . . 2-6
Figure 2-3: Time slot table (at the lower left of the screen) . . . . . . . . . . . . . . . . 2-13
Figure 2-4: Code domain power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-14
Figure 2-5: Power codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-16
Figure 2-6: Code power versus Time slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18
Figure 2-7: Code domain power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . . 2-20
Figure 2-8: Symbol constellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22
Figure 2-9: Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-23
Figure 2-10: Symbol eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-25
Figure 2-11: Symbol table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26
Figure 2-12: Modulation accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-27
Figure 2-13: Modulation accuracy versus Time slot, EVM (rms) . . . . . . . . . . . 2-28
Figure 2-14: Uplink analysis measurement menu in the Demod mode . . . . . . . 2-31
Figure 2-15: Code domain power measurement example . . . . . . . . . . . . . . . . . . 2-33
Figure 2-16: Subframe offset . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-36
Figure 2-17: HS-DPCCH display method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-38
Figure 2-18: HS-DPCCH display method . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-39
Figure 2-19: HS-DPCCH display method (symbol table) . . . . . . . . . . . . . . . . . . 2-40
Figure 2-20: View Format setting (code domain power) . . . . . . . . . . . . . . . . . . . 2-44
Figure 2-21: Time slot table (at the lower left of the screen) . . . . . . . . . . . . . . . 2-45
Figure 2-22: Code domain power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-46
Figure 2-23: Power codogram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-48
Figure 2-24: Code power versus Time slot . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-50
Figure 2-25: Code domain power versus Symbol . . . . . . . . . . . . . . . . . . . . . . . . 2-52
Figure 2-26: Symbol constellation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-54
Figure 2-27: Symbol EVM . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-55
Figure 2-28: Symbol eye diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-57
Figure 2-29: Symbol table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-58
Figure 2-30: Modulation accuracy . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-59
Figure 2-31: Modulation accuracy versus Time slot, EVM (rms) . . . . . . . . . . . 2-61
Figure 2-32: Gain ratio . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-63
Figure B-1: Setting the time slots to save . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . B-2
Figure B-2: CSV file example (code domain power measurement) . . . . . . . . . . . B-2
RSA3408A Option 40 User Manual
iii
List of Tables
List of Tables
Table 1-1: Additional functions in Option 40 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1-1
Table 1-2: 3GPP-R6 downlink transmission parameters . . . . . . . . . . . . . . . . . . . . 1-2
Table 1-3: 3GPP-R6 uplink transmission parameters . . . . . . . . . . . . . . . . . . . . . . 1-3
Table 2-1: Column items . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-13
Table 2-2: Vertical scale setting range, Symbol EVM . . . . . . . . . . . . . . . . . . . . . 2-24
Table 2-3: Vertical scale setting range, Modulation accuracy versus Time slot 2-29
Table 2-4: Channel number . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-44
Table 2-5: Time-slot table contents selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-45
Table 2-6: Vertical scale setting range, Symbol EVM . . . . . . . . . . . . . . . . . . . . . 2-56
Table 2-7: Vertical scale setting range, Modulation accuracy versus Time slot 2-62
Table A-1: Display format and scale . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . A-1
iv
RSA3408A Option 40 User Manual
Preface
About This Manual
Related Manuals
This manual provides operating instructions for the RSA3408A Real-Time
Spectrum Analyzer Option 40 3GPP Release 6 (HSUPA) analysis software.
The manual consists of the following sections:
Getting Started describes the overview of the 3GPP Release 6 analysis.
Operating Basics explains the menu functions and measurement procedures.
Appendices provide additional information about default settings and scale
setting ranges.
The analyzer uses Microsoft Windows XP as the operating system. This manual
does not describe common usage of Windows XP. Refer to your Windows manuals
as necessary.
PDF Manual
The following documents are also available for the analyzer.
RSA3408A User Manual
(Standard accessory; Tektronix part number 071-1617-XX)
Describes how to install the analyzer and how to work with the menus, and
details the standard functions. Also shows the specifications.
RSA3408A Programmer Manual
(Standard accessory; PDF, Tektronix part number 077-0003-XX)
Contains an alphabetical listing of the programming commands and other
information related to controlling the analyzer over the GPIB interface.
The programmer manual described above is a PDF document (the file size is about
3 MB). The file is stored in this directory on the analyzer hard disk:
C:\Program Files\Tektronix\wca200a\Manuals
Use the USB or LAN interface to copy the file onto your PC. Refer to the
RSA3408A User Manual for information about using the interface.
RSA3408A Option 40 User Manual
v
Preface
vi
RSA3408A Option 40 User Manual
Getting Started
Getting Started
The RSA3408A Option 40 3GPP Release 6 (HSUPA) analysis software enables
modulation analysis of HSUPA (High Speed Uplink Packet Access) signals
defined in 3GPP (3
rd
Generation Partnership Project) Release 6 (“3GPP-R6”).
Measurements can be performed on downlink QPSK and 16QAM or uplink BPSK
signals.
Table 1-1 summarizes the functions added in Option 40 by the measurement modes
of the analyzer.
Table 1-1: Additional functions in Option 40
Measurement mode Additional functions Requirement
S/A (spectrum analysis) None Demod
(modulation analysis)
Time (time analysis) None -
3GPP-R6 downlink analysis
Code domain power
Power codogram
Code power versus Time slot
Code power versus Symbol
EVM versus Time slot
Symbol constellation
Symbol EVM (Error Vector Magnitude)
Symbol eye diagram
Symbol table
Modulation accuracy
Modulation accuracy
3GPP-R6 uplink analysis
Code domain power
Power codogram
Code power versus Time slot
Code power versus Symbol
EVM versus Time slot
Symbol constellation
Symbol EVM (Error Vector Magnitude)
Symbol eye diagram
Symbol table
Modulation accuracy
Modulation accuracy
Gain ratio
versus Time slot
versus Time slot
Option 27
3GPP-R5 analysis
software
Option 23
W-CDMA uplink
analysis software
and
Option 27
3GPP-R5 analysis
software
NOTE.
(for uplink analysis only) and Option 27 3GPP-R5 analysis software as shown in
Table 1-1.
RSA3408A Option 40 User Manual
Option 40 3GPP-R6 analysis software requires Option 23 W-CDMA uplink
1-1
Getting Started
Analysis Definition
The analyzer performs measurements according to 3GPP-R6 specifications.
Downlink Analysis
Table 1-2 shows the 3GPP-R6 downlink transmission parameters for the analyzer.
Table 1-2: 3GPP-R6 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 and displays 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.
RSA3408A Option 40 User Manual
Getting Started
Uplink Analysis
Measurement Process.
The following steps show the internal process for the
3GPP-R6 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-R6 uplink signals:
DPCCH (Dedicated Physical Control Channel)
DPDCH (Dedicated Physical Data Channel)
HS-DPCCH (Dedicated Physical Control Channel for HS-DSCH
(High Speed Downlink Shared Channel))
E-DPCCH (Enhanced Dedicated Physical Control Channel)
E-DPDCH (Enhanced Dedicated Physical Data Channel)
The analyzer covers the 3GPP-R6 uplink transmission parameters listed in
Tab le 1-3 .
Table 1-3: 3GPP-R6 uplink transmission parameters
Item DPCCH DPDCH HS-DPCCH E-DPCCH E-DPDCH
Chip rate 3.84 Mcps
Symbol rate 15 ksps 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 5 sub-frames, 10 ms 15 time-slots, 10 ms
Time slot 2560 chips, 667
Scrambling code Long or short. Number: 0 to 16,777,215
Modulation method BPSK
Baseband filter Root-cosine with
16114
Can be set in the range of 0.0001
15 ksps 15 ksps 15, 30, 60, 120, 240,
480, 960, and 1920
ksps
µ
s
α
= 0.22 (default).
≤ α≤
1
RSA3408A Option 40 User Manual
1-3
Getting Started
Measurement Functions.
HS-DPCCH analysis: Measures the HS-DPCCH to detect and display the
The analyzer has the following measurement functions:
ACK/NACK/PRE/POST indicator, DTX (Discontinuous Transmission), and
CQI (Channel Quality Indicator).
E-DPCCH analysis: Measures the E-DPCCH to detect and display the E-TFC
(E-DCH Transport Format Combination) indicator, RSN (Retransmission
Sequence Number), and Happy.
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-R6 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
RSA3408A Option 40 User Manual
Measurement Menu
Getting Started
Figure 1-1 shows the measurement menus related to the 3GPP-R6 analysis. The
menu items boxed with solid lines indicate the functions included in Option 40.
MODE
S/A
DEMOD
TIME
Option
27
Standard... 3GPP-R5-DL * Channel Power
3GPP-R5-UL *
Option 40
Standard... 3GPP-R6-DL * Code Domain Power
Measure menu items
ACLR
Spectrum Emission Mask
OBW
EBW
Carrier Frequency
Channel Power
ACLR
Spectrum Emission Mask
OBW
EBW
Carrier Frequency
Power Codogram
Code Power versus Time Slot
Code Power versus Symbol
EVM versus Time Slot
Symbol Constellation
Symbol EVM
Symbol Eye Diagram
Symbol Table
Modulation Accuracy
Mod Acc versus Time Slot
Figure 1-1: Measurement menus for the 3GPP-R6 analysis
RSA3408A Option 40 User Manual
3GPP-R6-UL * Code Domain Power
Power Codogram
Code Power versus Time Slot
Code Power versus Symbol
EVM versus Time Slot
Symbol Constellation
Symbol EVM
Symbol Eye Diagram
Symbol Table
Modulation Accuracy
Mod Acc versus Time Slot
Gain Ratio
CCDF
(Standard)
* DL and UL represent downlink and uplink, respectively.
1-5
Getting Started
NOTE.
Option 40 performs only modulation analysis in the Demod mode. For
spectrum analysis in the S/A mode, use Option 27 (3GPP-R5 analysis software).
The following sections detail the measurement functions included in Option 40
which are indicated in the two boxes in Figure 1-1. For details on the other
measurements, refer to the following user manuals:
For the 3GPP-R5 analysis in the S/A mode, refer to the RSA3408A Option 27
3GPP Release 5 Downlink (HSDPA) Analysis Software User Manual
(Tektronix part number 071-1681-XX).
For the CCDF (Complementary Cumulative Distribution Function) analysis in
the Time mode, refer to the RSA3408A User Manual (Tektronix part number
071-1617-XX).
NOTE.
If you are not familiar with the operation of the RSA3408A, refer to the
RSA3408A User Manual (Tektronix part number 071-1617-XX).
1-6
RSA3408A Option 40 User Manual
Operating Basics
Downlink Analysis
This section describes the basic operation of the 3GPP-R6 downlink analysis in the
Demod (Modulation Analysis) mode. You can access the measurement items by
pressing DEMOD →Standard... → 3GPP-R6-DL as shown in Figure 2-1.
DEMOD
Figure 2-1: Downlink analysis measurement menu in the Demod mode
MODE
S/A
TIME
Standard... 3GPP-R6-DL
Measure menu items
Code Domain Power
Power Codogram
Code Power versus Time Slot
Code Power versus Symbol
Symbol Constellation
Symbol EVM
Symbol Eye Diagram
Symbol Table
Modulation Accuracy
Mod Acc versus Time Slot
The measurement in the Demod mode is based on the digital modulation analysis
function. For the digital modulation analysis, refer to the RSA3408A User Manual.
Transmission Diversity.
This software performs analysis synchronizing with
CPICH of the STTD antenna 1 or 2 automatically, but does not apply decode
(symbol replacement and inversion).
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Downlink Analysis
Measurement Procedure
The following procedure shows you how to acquire data of multiple slots in
advance, measure continuous data, and obtain continuous code domain power:
NOTE.
RSA3408A User Manual.
1. Press the DEMOD key on the front panel.
2. Press the side key Standard... →3GPP-R6-DL.
3. Press the FREQUENCY/CHANNEL key on the front panel to set frequency.
4. Press the SPAN key on the front panel to set the span.
5. Press the AMPLITUDE key on the front panel to set the amplitude
NOTE.
center top of the screen. If this occurs, raise the reference level.
6. Press the TIMING key on the front panel and then the Acquisition Length
For details on setting frequency, span, and amplitude, refer to the
If you use the channel table, do these steps:
a. Press the Channel Table... side key and select W-CDMA-DL.
b. Press the Channel side key and select a channel by rotating the general
purpose knob.
The center frequency is set to the value corresponding to the channel.
appropriately.
If the input level is too high, A/D OVERFLOW displays in the red box at the
side key to set the time length to acquire one block.
2-4
Suppose that one block contains M frames; the acquisition length is calculated
with this equation:
(One block acquisition length) = M × (One frame acquisition length)
One frame acquisition length is determined by span and indicated on the
Spectrum Length side key.
The number of frames M required for measuring N slots must meet the
following condition:
M > K × (N + 1.2) + 1
where
K = 16.7 (for the span of 20 MHz and 15 MHz)
8.34 (for the span of 10 MHz)
4.17 (for the span of 5 MHz)
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Downlink Analysis
7. After acquiring measurement data, stop the data acquisition. If you are
acquiring data in the continuous mode, press the RUN/STOP key.
8. Press the MEASURE key on the front panel and select measurement items.
For example, press the Power Codogram side key to observe the code domain
power spectrogram.
9. Press the MEAS SETUP key on the front panel and set the measurement
parameters. Refer to page 2-7 for details of the Meas Setup menu.
10. Set the analysis range in the overview using the Timing menu.
Refer to the RSA3408A User Manual for the details.
11. Press the MEAS SETUP key on the front panel and then the Analyze side key
to start processing the frames in the analysis range. The results are displayed
in the main view.
Change the scale and format of the view as needed. Refer to page 2-10 for
setting views specific to the 3GPP-R6 downlink analysis.
12. If the level of input signals is low, the waveform may not be displayed
correctly. In this case, perform the following procedure:
NOTE.
The 3GPP-R6 downlink signal analysis may not be performed correctly if
the P-SCH, S-SCH, and PCPICH channels are too low to be detected. An error
occurs when one of these channel levels is lower than several tenths the sum of
other channel levels. In this case, set Scrambling Code Search to Off and specify
the scrambling code with the Scrambling Code side key.
a. Press the MEAS SETUP key on the front panel.
b. Press the Modulation Parameters... side key.
c. Press the Scrambling Code Search side key to select Off.
d. Press the Scrambling Code side key and enter the scrambling code.
The analyzer performs measurement with the value set here in place of
detecting the scrambling code.
e. Press the MEAS SETUP key on the front panel.
f. Press the Analyze side key to perform measurement for the frames in the
analysis range.
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Downlink Analysis
Figure 2-2 shows an example of the code domain power measurement.
Figure 2-2: Code domain power measurement example
Change the scale and format of the view as needed. Refer to page 2-10 for setting
views specific to the 3GPP-R6 downlink analysis.
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RSA3408A Option 40 User Manual
Measurement Setup Menu
Press the MEAS SETUP key on the front panel to set the measurement parameters.
The Meas Setup menu for the 3GPP-R6 downlink modulation analysis contains the
following controls:
Downlink Analysis
Analyze
Modulation Parameters...
Performs analysis for time slots in the analysis range.
NOTE.
When you change the parameter setting(s) in the Meas Setup menu, press
the Analyze side key to perform the measurement for the modified setting(s).
Sets a measurement parameter to a non-standard value. The following controls are
provided:
Scrambling Code Search.
Selects whether to perform analysis by detecting a
scrambling code from input signals.
On. Detects a scrambling code automatically from the input signal to perform
the measurement.
Off. Default. Performs measurement using the scrambling code that has been
set manually with Scrambling Code described below.
NOTE.
The manual mode (Scrambling Code Search Off) should be used with the
appropriate scrambling code for reliable detection when either multiple code
channels are active or the sync channels have low power.
Also refer to Note on page 2-5.
Scrambling Code.
Scrambling Code Search. The analyzer performs measurement using the set
scrambling code. Range: 0 to 24575 (default: 0).
The 3GPP standard defines the scrambling code with the following formulas.
Input the n value to set the code.
Use Alternative Scramb. Code...
measurement results:
Not Used. Default. Uses the primary scrambling code only (without the left
Primary. Uses the primary scrambling with the left and the right alternative
RSA3408A Option 40 User Manual
Sets the scrambling code number when you select Off in
Primary scrambling code: n = 16 * i where i = 0 to 511
Secondary scrambling code: n = 16 * i + k where k = 1 to 15
Selects the de-spread method to display the
and the right alternative scrambling codes) to de-spread the input signal.
scrambling codes to de-spread the input signal.
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Downlink Analysis
Left Alternative. Uses the left alternative scrambling code to de-spread the
input signal.
Right Alternative. Uses the right alternative scrambling code to de-spread the
input signal.
Primary, Left Alternative and Right Alternative use the proprietary algorithm to
enhance the sensitivity by approximately 20 to 30 dB compared to Not Used.
Not Used does not use the alternative scrambling codes for faster measurement.
Use SCH Part.
Selects whether to include or exclude the SCH (Synchronization
Channel) portion when calculating the code domain power.
On. Calculates the code domain power by including the SCH portion.
Off. Default. Calculates the code domain power by excluding the SCH portion.
Composite.
Determines whether to perform the composite analysis (automatic
detection of symbol rate).
On. Default. Specifies that the composite analysis is performed.
Off. Specifies that the composite analysis is not performed.
NOTE.
You should usually specify that composite analysis is performed. If a normal
analysis does not result, select Off in this command and select a specific symbol
rate with Symbol Rate in the View: Define menu.
16QAM Detection.
Selects whether to detect the QPSK or 16QAM code channel
automatically.
On. Default. Automatically detects whether the code channel is QPSK or
16QAM.
Off. Assumes that all code channels are QPSK.
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Measurement Filter...
None (no filter)
RootRaisedCosine (default)
Reference Filter...
None (no filter)
RaisedCosine (default)
Gaussian
Selects a filter for demodulating digitally-modulated signals:
Selects a filter for creating reference data:
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Downlink Analysis
For the filters, refer to Process Flow of Digitally-Modulated Signal in the
RSA3408A User Manual.
E-AGCH Code
E-RGCH/E-HICH Code
E-RGCH Sequence Index
E-HICH Sequence Index
Filter Parameter.
Sets the a/BT value for Measurement Filter and Reference Filter
described above. Range: 0.0001 to 1 (default: 0.22).
EVM IQ Origin Offset.
Determines whether to include the I/Q origin offset in the
EVM (Error Vector Magnitude), Rho (waveform quality), and PCDE (Peak
Code-Domain Error) calculation.
Include. Default. Includes the I/Q origin offset in the calculation.
Exclude. Excludes the I/Q origin offset from the calculation.
Specifies the E-AGCH (E-DCH Absolute Grant Channel) code.
Range: Channel 0 to 127 (default: 0).
Specifies the E-RGCH (E-DCH Relative Grant Channel) or E-HICH (E-DCH
HARQ Acknowledgement Indicator Channel) code.
Range: Channel 0 to 127 (default: 0).
Specifies the E-RGCH sequence index number.
Range: 0 to 39 (default: 0).
Specifies the E-HICH sequence index number.
Range: 0 to 39 (default: 0).
Update Timeslot Table
Re-analyzes the existing time slot data to update the table display after you change
the subframe offset manually or abort the Analyze (top side key) operation.
Auto Carrier
Frequency Offset
Selects whether to detect the carrier automatically.
On. Default. Automatically detects the carrier for every frame.
Off. Sets the carrier frequency using Frequency Offset described below.
Sets the carrier frequency when Auto Carrier is selected to Off.
Input the carrier offset from the center frequency.
RSA3408A Option 40 User Manual
The error from the center frequency is shown on the Freq Error side key.
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Downlink Analysis
Scale and Format of View
The following main views are specific to the measurement items of the 3GPP-R6
downlink analysis in the Demod mode:
Code domain power
Power codogram
Code power versus Time slot
Code power versus Symbol
Symbol constellation
Symbol EVM
Symbol eye diagram
Symbol table
Modulation accuracy
Modulation accuracy versus Time slot
The scale and format of view are controlled by the View menu. This section
describes the View: Define menu and the View: Scale menu for each view.
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Downlink Analysis
View: Define Menu
The View: Define menu is common to all main views of the 3GPP-R6 downlink
measurement items. It contains the following controls:
Show Views.
Single. Displays only the view selected by the VIEW: SELECT key.
Multi. Default. Displays the overview, subview, and main view.
Overview Content...
Waveform (power versus time)
Spectrogram
Subview Content...
Spectrum
Code Domain Power
Power Codogram
CDP vs Time Slot (Code Domain Power versus Time Slot)
CDP vs Symbol (Code Domain Power versus Symbol)
Selects the view style:
Selects a view to display in the overview:
Selects a view to display in the subview:
EVM vs Time Slot
Symbol Constellation
Symbol EVM
Symbol Eye Diagram
Symbol Table
Modulation Accuracy
Time Slot.
Sets a time slot number to position the marker.
Range: 0 to [(the number of slots) −1] (default: 0).
Channelization Code.
Sets a channelization code number to position the marker.
Range: Channel 0 to 511 (default: 0).
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Downlink Analysis
Multi Slot.
Selects whether to display single slot or multiple slots in the main view.
This selection is effective only in the code domain power versus symbol view and
the symbol EVM view. In the other views, it has no effect.
Off. Displays a time-slot selected by the Time Slot side key.
On. Displays up to 15 time-slots in the main view.
Menu Off.
Turns off the side menu on screen to expand the waveform and
measurement result display. Press the MENU side key when you return to the
original display.
Show SCH Part.
Determines whether to display SCH (Synchronization Channel) at
the beginning of data.
Off. Hides the SCH part.
On. Shows the SCH part.
Symbol Rate...
960 k
480 k
Sets the symbol rate for displaying symbol constellation:
240 k
120 k
60 k
30 k
15 k
7.5 k
Composite
The default is Composite for multi-rate.
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