89601B/BN-B7X TD-SCDMA Modulation Analysis

89600B Vector Signal Analysis Software

Technical Overview

Key Features• Analyze downlink and uplink signals, all modulation formats:

QPSK, 16QAM, HSDPA/8PSK/64QAM

• Choose the analysis level you need: timeslot, composite, or code

channel/layer

• See CDE and CDP results for composite signal or specifi ed code

layer

• Get a 20:20 view of the entire signal using 20 traces, sized the

way you want, each with 20 markers

• Evaluate your error budget at baseband, IF, and RF

2

Table of Contents

Key Features .....................................................................................................1TD-SCDMA Modulation Analysis ................................................................3 Analysis and Troubleshooting ......................................................................4Software Features ...........................................................................................8Key Specifi cations ...........................................................................................11Ordering Information ......................................................................................13Additional Resources .....................................................................................14

3

Troubleshoot and analyze TD-SCDMA

modulation and RF performance with

Option B7X for Agilent’s 89600B vec-

tor signal analysis (VSA) software.

One of a family of options for the

89600B VSA software, this analysis

package includes the 3GPP N-TDD

1.28 Mcps version of TD-SCDMA,

including HSDPA (16QAM, 64QAM,

and 8PSK).

Option B7X demodulates HSDPA

16QAM and 8PSK modulated code

channels, with automatic detection

of code channel modulation type,

including manual override and auto-

matic detection of multiple mid-amble

shifts. Get maximum visibility into the

signal with single code domain layer

or composite power and code domain

displays. Normalize code-domain

power to display code domain power

relative to total signal power. Make

automatic measurements of rho,

EVM, frequency error, I/Q offset, I/Q

skew and more.

TD-SCDMA is just one of over 70

signal standards and modulation

types for which the 89600B vector

signal analysis (VSA) software cre-

ates a window into what’s happening

inside your complex wireless devices.

The 89600B tools provide views of

virtually every facet of a problem,

helping you see the “why?” behind

signal problems. Whether you’re

working with emerging or established

standards, Agilent’s industry-leading

89600B VSA software helps you see

through the complexity.

Try before you buy!

Download the 89600B software and use it free for 14 days to make measurements with your analysis hardware, or use our recorded demo signals by selecting File > Recall > Recall Demo > TD-SCDMA > on the software toolbar. Request your free trial license today:

www.agilent.com/find/89600B_trial

TD-SCDMA Modulation Analysis

TD-SCDMA technology overview

Time division-synchronous code

division multiple access

(TD-SCDMA) combines FDMA and

CDMA technologies. Unlike W-CDMA

and cdma2000® technologies, this

TDD standard transmits and receives

on the same frequency, which greatly

increases spectrum effi ciency.

Because TD-SCDMA effectively

handles symmetrical and asymmetrical

traffi c, it is ideal for data-intensive

applications, such as mobile internet

access and multimedia applications.

TD-SCDMA was proposed by the

China Wireless Telecommunication

Standards group (CWTS) and approved

as a 3G technology by ITU in 1999. The

TD-SCDMA standard is fully supported

by 3GPP and the China Communication

Standards Association (CCSA). The

3GPP TD-SCDMA standard is also

known as the low chip rate (LCR)

option of TDD, which is included in

the 3GPP Universal Terrestrial Radio

Access (UTRA) as the UTRA-TDD

option.

4

Analysis and Troubleshooting

Gain insight into your signal with 20:20 visibility

The 89600B VSA software profi les

the signal’s power over time with

up to 20 traces with 20 markers

each, allowing you to look at overall,

composite, and layer performance,

simultaneously. An error summary

table provides detailed pilot phase

coding information and individual

timeslot error data, with chip timing,

total power, midamble power and

data fi eld power error information.

Compare all these values at base-

band, IF, and RF.

View overall, composite, and layer data. The Overall Time trace, which provides an arrow to indi-

cate the uplink/downlink status of each timeslot, shows timeslot 6 selected. IQ constellations for

the layer and composite signals appear in Traces E and C.

Insightful display formats help characterize signals. Here, a captured signal has been replayed using

overlap processing to effectively “slow it down.” The cumulative history display format (Trace B),

highlights signal performance over very long periods.

5

Review your signal’s performance with CDE and CDP data

Code domain error (CDE) and code

domain power (CDP) results are

available for the layer or the com-

posite signal in either averaged or

instantaneous value form. The CDE

of a particular code channel is a

measure of the error power in a code

channel relative to the total signal

power. CDP is an analysis of the dis-

tribution of signal power across the

set of code channels normalized to

the total signal power. Together they

provide key insight into the perfor-

mance of a TD-SCDMA system.

CDE and CDP data is shown in a multi-color format that assigns a unique color to each active code layer,

for easy visual identifi cation. Markers on the composite trace help with the identifi cation of code layers.

Dynamic Help quickly links you to the explanation of a menu or trace. Here, it provides information on

the Channel/Layer tab where you can select the desired despread channel and CDP code layer that you

would like to display.

6

Get a clear view of composite signals

Composite denotes trace data results

for the composite signal, which in-

cludes all spread code lengths (sym-

bol rate) and code channels. These

measurements, useful for evaluating

the overall in-band performance of

the signal, include: composite code

domain power (CDP) and composite

code domain error (CDE), as well as

time domain measurements such as

rho, EVM, EVM spectrum, and EVM

time.

Detailed error information on the composite signal performance of a single timeslot provides the

next layer of powerful troubleshooting. Note that for error traces with time (chips) on the x-axis,

the midamble location is denoted.

7

Open a window into your signal with channel analysis

The 89600B lets you look at your

signal one channel at a time. Specify

the code channel and spread code

length to uniquely specify a channel,

and you can look at its IQ trajectory

and errors over time. Detailed chan-

nel error summary data provides both

bit demodulation and detailed overall

error measurements.

The Channel Error Summary table provides detailed

modulation quality statistics for a selected channel/

layer. Phase and Magnitude Error traces are available to

examine error over time. Use the Channel/Layer tab of the

Demodulation Properties tab to select a despread channel.

89600B VSA is the industry-leading measurement software for evaluating and troubleshooting wireless signals in R&D. PC-based and supporting numerous measurement platforms, the 89600B provides the fl exibility and sophisticated measurement tools essential to fi nding and fi xing signal problems.

X-Series advanced measurement applications provide embedded format-specifi c, one-button measurements for X-Series analyzers. With fast measurement speed, pass/fail testing and simplicity of operation, these applications are ideally suited for design verifi cation and manufacturing.

www.agilent.com/find/X-Series_Apps

Choosing between 89600B VSA software and X-Series measurement applications

8

Software Features

Signal acquisition

Result length 1 to 8 subframes maximum. Value hardware dependent

Start boundary Sub-frame, 2 frames

Time reference Trigger point, downlink pilot, uplink pilot

Samples per symbol

(code channel results)

1

Samples per chip

(composite results)

1

Triggering Single/continuous, external

Measurement region Analysis timeslot selectable within fi rst sub-frame

Signal playback

Result length 1 to 8 subframes maximum. Value hardware dependent

Capture length (gap-free analysis at

0% overlap at 1.6 MHz span)

Capture length is hardware dependent. See hardware specifi cations for more

information.

Format

Standards supported 3GPP TDD 1.28 Mc/s option, Release 5.0.0, December 2003

Formats Downlink, uplink

Single-button presets 3GPP N-TDD 1.28 Mcps

Modulation formats QPSK, 16QAM, HSDPA/8PSK/64QAM

Adjustable parameters

Format parameters

Chip rate Continuously adjustable

Filter alpha Continuously adjustable between 0.05 and 1.0

Enable HSPA/8PSK

Code/ID parameters

Downlink pilot sequence 0 to 311

Uplink pilot sequence 0 to 2551

Scramble sequence 0 to 1271

Basic midamble sequence 0 to 1271

Midamble autodetect Detects midamble code ID and sets Basic Midamble and Scrambling Code IDs

(when in Midamble subframe synchronization mode)

Max users (selectable for each

timeslot)

2, 4, 6, 8, 10, 12, 14, 16

Force code group settings

Downlink pilot Downlink pilot code ID acts as master to determine the Code Group states. Non-

standard code ID sequence allocations also allowed via Code Group check boxes.

Any code User-selected Code ID (downlink pilot, uplink pilot, scramble or basic midamble)

determines master for Code Group states

1. Value dependent on Force Code Group settings.

9

Channel/layer parameters

Despread channel parameters Specifi es the timeslot and code channel with spreading factor that is used for the

channel measurement data results

Spread code length (despread

channel)

Used along with the Despread Channel Code Channel to specify the active code

layer and channel used for the channel trace data measurement results

Code channel (despread

channel)

Used along with the Despread Channel Spread Code Length to specify the active

code channel and layer used for the channel trace data

CDP layer parameters Specifi es the active (displayed) code domain layer for the CDP layer and CDE layer

trace data

Spread code length (despread

channel)

Selects the active code domain layer (Spread Code Length) for the CDP Layer trace

data

Modulation scheme parameters Specifi es how the modulation type used for demodulation is detected

Auto-detect for all code

channels

Tests all code channels for SF1 and SF16 for modulation formats QPSK and

16QAM, then performs analysis based on the detected modulation format

(HSPA/8PSK only)

Manual Specifi es the parameters that determine the TD-SCDMA Modulation Scheme used

in the signal analysis: SF “Spread Factor”, Chan and Mod Type

Time parameters

Result length Determines the signal capture length in terms of sub frames for used for demodu-

lation and signal analysis

Time reference Specifi es the time reference used to compute the Overall Error Summary - Timing

Error data results

Start boundary Specifi es when to start the Result Length data capture

Uplink switch point Specifi es which Traffi c TimeSlots are uplink and which are downlink

Analysis timeslot Specifi es which sub-frames timeslot, within the selected Analysis Sub-frame, is

used for analysis and trace data measurement results

Analysis sub-frame Specifi es which sub-frame, within the acquired Result Length, is used for analysis

and trace data measurement results

Advanced parameters

Active slot threshold Sets the active slot detection threshold a value dB below the slot with the largest

measured power

Subframe synchronization Pilot, midamble

Slot frequency reference Pilot, midamble

Active channel threshold Sets the threshold above which a code channel is detected active and included in

the Composite Reference waveform (auto, manual)

Normalize IQ traces Applies trace data normalization to the trace data results

Mirror frequency spectrum Correctly demodulates frequency spectrums that are mirrored (fl ipped) about the

center frequency

Include IQ offsest in EVM Controls whether the Composite IQ Offset is included Composite EVM data result

Show raw QPSK symbols Affects the Composite Symbols display pilot bits or midamble bits, depending on

which timeslot is the Analysis TimeSlot

10

Measurement results

Composite All code channels at once or all symbol rates taken together.

IQ measured Time, spectrum

IQ reference Time, spectrum

IQ error versus time Magnitude and phase (IQ measured versus reference); including instantaneous

Error vector Time, spectrum (vector difference between measured and reference); including

instantaneous

Error summary EVM, magnitude error, phase error, rho, peak active CDE, peak CDE, frequency er-

ror, IQ offset, IQ skew, slot amplitude droop

Symbols Table of symbol numbers and value

Channel Time domain trace data results for a single code channel within a specifi ed code

layer

IQ measured Time

IQ reference Time

IQ error versus time Magnitude and phase (IQ measured versus reference)

Error vector Time (vector difference between measured and reference)

Symbol table and error summary EVM, magnitude error, phase error, code phase (degs), detected modulation, data

bits

CDP/CDE data All code channels at once or specifi ed code layer

Code domain power All symbol rates taken together; individual symbol rates (80, 160, 320, 640, 1280

ksps); available for composite signal, specifi ed layer, instantaneous composite, or

instantaneous layer

Code domain error All symbol rates taken together; individual symbol rates (80, 160, 320, 640, 1280

ksps); available for composite signal, specifi ed layer, instantaneous composite, or

instantaneous layer

Overall Time domain trace data results derived from the channel X pre demodulated TD-

SCDMA burst data

Time Aligned analysis region; active timeslots highlighted

Filtered time IQ time, RRC fi ltered, resampled to 4x chip rate

Error summary Timing error, total power, midamble power, data power for each timeslot, data

power left (before preamble), and data power right (after preamble)

Chan X trace data Time and frequency trace results from pre-demodulated chan X input data

Analysis timeslot Analyze single timeslot for time, spectrum, PDF, CDF, CCDF

Pre-demodulation Time, spectrum, correction, raw main time, instantaneous spectrum

Display formats

Overall time measurement results Active timeslots highlighted with background color

DP and CDE measurement results Active code channels highlighted by CDP layer color

11

Key Specifi cations1

This technical overview provides nominal performance specifi cations for the software when making measurements with

the specifi ed platform. Nominal values indicate expected performance, or describe product performance that is useful in the

application of the product, but is not covered by the product warranty.

For a complete list of specifi cations refer to the measurement platform literature.

X-Series signal analyzers

PXA MXA (includes

Option BBA as noted)

EXA

Signal playback

Result length 1 to 8 sub-frames 1 to 8 sub-frames 1 to 8 sub-frames

Capture length > 25,000 sub-frames > 50 sub-frames > 50 sub-frames

Gap free analysis at 0% overlap;

1.6 MHz span

> 26,200 sub-frames with

Opt. BBA (BBIQ only)

Accuracy

Conditions 10 MHz to 3.6 GHz, input range > –30 dBm and within 5 dB of total signal power

Code domain

CDP accuracy Spread channel power within 20 dB of total power

±0.3 dB ±0.3 dB 2 ±0.3 dB

Symbol power versus time Spread channel power within 20 dB of total power

±0.3 dB ±0.3 dB 2 ±0.3 dB

Composite EVM

EVM fl oor ≤ 1.5% ≤ 1.5% 2 ≤ 1.5%

Frequency error

Lock range ±500 Hz ±500 Hz ±500 Hz

Accuracy ±10 Hz ±10 Hz ±10 Hz

1. Data subject to change.

2. Results apply to MXA with Option BBA.

12

PSA ESA

Signal playback

Result length 1 to 8 sub-frames 1 to 5 sub-frames 1

Capture length Gap free analysis at 0% overlap; 1.6 MHz span

10 sub-frames 5 sub-frames 1

Accuracy

Conditions 10 MHz to 3 GHz, input range

≥ –24 dBm and within 5 dB of total

signal power

Input range within 5 dB of total signal

power, between 30 MHz and 3 GHz

Code domain

CDP accuracy Spread channel power within 20 dB of total power

±0.3 dB ±0.3 dB

Symbol power versus time Spread channel power within 20 dB of total power

±0.3 dB ±0.3 dB

Composite EVM

EVM fl oor ≤ 1.5% ≤ 1.5%

Frequency error

Lock range ±500 Hz ±500 Hz

Accuracy ±10 Hz ±10 Hz

Other analysis platforms

1. Requires frequency span ≤ 2.5 MHz, sub-frame start boundary. Drops to 2 sub-frames for two frame start boundary.

13

Model-Option Description Notes

PC/Instrument license

Floating license

89601B 89601BN 89600B VSA software Required

89601B-B7X 89601BN-B7X TD-SCDMA modula-

tion analysis

Required for

TD-SCDMA modu-

lation analysis

89601B-200 89601BN-200 Basic vector signal

analysis

Required

89601B-300 89601BN-300 Hardware connectivity Required

Ordering Information

Software licensing and confi guration

Choose from two license types:

• PC/instrument license: Order

89601B if the software license will

reside on a PC/instrument. The

license can be trans ferred to

another PC/instrument at any time.

• Floating license: Order 89601BN if

the software license will reside on

a server to be accessed by multiple

users, one at a time.

Hardware confi guration

The 89600B software supports over

30 instrument platforms including

spectrum analyzers, oscilloscopes,

logic analyzers and modular instru-

ment systems with its hardware

connectivity option (89601B/BN-300).

www.agilent.com/fi nd/89600B_hardware

Keep your 89600B VSA up-to-date

With rapidly evolving standards and continu-ous advancements in signal analysis, the 89601BU/BNU software update and sub-scription service offers you the advantage of immediate access to the latest features and enhancements available for the 89600B VSA software.

www.agilent.com/find/89600B_upgrades

You can upgrade!

All 89600B options can be added after your initial purchase and are license-key enabled. For more information please refer to

UPGRADE

www.agilent.com/find/89600B

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Product specifications and descriptions in this document subject to change without notice.

© Agilent Technologies, Inc. 2011Printed in USA, January 31, 20115990-6393EN

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Additional Resources

Literature89600B Vector Signal Analysis Soft-

ware, Brochure, literature number

5990-6553EN

89600B Vector Signal Analysis Soft-

ware, Confi guration Guide, literature

number 5990-6386EN

89600B Opt 200 Basic VSA and Opt

300 Hardware Connectivity, Technical

Overview, literature number

5990-6405EN

Webwww.agilent.com/fi nd/cellular

www.agilent.com/fi nd89600B

cdma2000 is a US registered certifi ca-

tion mark of the Telecommunications

Industry Association.