Rohde&Schwarz FSV-K84, FSV-K85 Operating Manual

R&S® FSV-K84/-K85 1xEV-DO Analysis

Operating Manual

(;ÚÚP2)

1176.7632.02 ─ 05

Operating Manual

Test & Measurement

This manual describes the following R&S®FSV/FSVA options:

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R&S FSV-K84 (1310.8803.02)

●

R&S FSV-K85 (1310.8778.02)

This manual describes the following R&S FSV/FSVA models with firmware version 3.00 and higher:

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R&S®FSV4 (1321.3008K04)

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R&S®FSVA4 (1321.3008K05)

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R&S®FSV7 (1321.3008K07)

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R&S®FSVA7 (1321.3008K08)

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R&S®FSV13 (1321.3008K13)

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R&S®FSVA13 (1321.3008K14)

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R&S®FSV30 (1321.3008K30)

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R&S®FSVA30 (1321.3008K31)

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R&S®FSV40 (1321.3008K39/1321.3008K40)

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R&S®FSVA40 (1321.3008K41)

It also applies to the following R&S®FSV models. However, note the differences described in Chapter 1.4,

"Notes for Users of R&S FSV 1307.9002Kxx Models", on page 9.

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R&S®FSV3 (1307.9002K03)

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R&S®FSV7 (1307.9002K07)

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R&S®FSV13 (1307.9002K13)

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R&S®FSV30 (1307.9002K30)

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R&S®FSV40 (1307.9002K39/1307.9002K40)

© 2015 Rohde & Schwarz GmbH & Co. KG Mühldorfstr. 15, 81671 München, Germany Phone: +49 89 41 29 - 0 Fax: +49 89 41 29 12 164 Email: info@rohde-schwarz.com Internet: www.rohde-schwarz.com Subject to change – Data without tolerance limits is not binding. R&S® is a registered trademark of Rohde & Schwarz GmbH & Co. KG. Trade names are trademarks of the owners.

The following abbreviations are used throughout this manual: R&S®FSV/FSVA is abbreviated as R&S FSV/FSVA.

R&S® FSV-K84/-K85

1 Preface

Preface

Documentation Overview

1.1 Documentation Overview

The user documentation for the R&S FSV/FSVA is divided as follows:

●

Quick Start Guide

●

Operating Manuals for base unit and options

●

Service Manual

●

Online Help

●

Release Notes

Quick Start Guide

This manual is delivered with the instrument in printed form and in PDF format on the CD. It provides the information needed to set up and start working with the instrument. Basic operations and basic measurements are described. Also a brief introduction to remote control is given. The manual includes general information (e.g. Safety Instructions) and the following chapters:

Chapter 1 Introduction, General information

Chapter 2 Front and Rear Panel

Chapter 3 Preparing for Use

Chapter 4 Firmware Update and Installation of Firmware Options

Chapter 5 Basic Operations

Chapter 6 Basic Measurement Examples

Chapter 7 Brief Introduction to Remote Control

Appendix LAN Interface

Operating Manuals

The Operating Manuals are a supplement to the Quick Start Guide. Operating Manuals are provided for the base unit and each additional (software) option.

The Operating Manual for the base unit provides basic information on operating the R&S FSV/FSVA in general, and the "Spectrum" mode in particular. Furthermore, the software options that enhance the basic functionality for various measurement modes are described here. The set of measurement examples in the Quick Start Guide is expanded by more advanced measurement examples. In addition to the brief introduction to remote control in the Quick Start Guide, a description of the basic analyzer commands and programming examples is given. Information on maintenance, instrument interfaces and error messages is also provided.

In the individual option manuals, the specific instrument functions of the option are described in detail. For additional information on default settings and parameters, refer

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to the data sheets. Basic information on operating the R&S FSV/FSVA is not included in the option manuals.

The following Operating Manuals are available for the R&S FSV/FSVA:

●

Preface

Documentation Overview

R&S FSV/FSVA base unit; in addition: – R&S FSV-K9 Power Sensor Support – R&S FSV-K14 Spectrogram Measurement R&S FSV-K7 Analog Demodulation and R&S FSV-K7S FM Stereo Measurements R&S FSV-K10 GSM/EDGE Measurement R&S FSV-K30 Noise Figure Measurement R&S FSV-K40 Phase Noise Measurement R&S FSV-K70 Vector Signal Analysis Operating Manual

R&S FSV-K70 Vector Signal Analysis Getting Started (First measurements) R&S FSV-K72 3GPP FDD BTS Analysis R&S FSV-K73 3GPP FDD UE Analysis R&S FSV-K76/77 3GPP TD-SCDMA BTS/UE Measurement R&S FSV-K82/83 CDMA2000 BTS/MS Analysis R&S FSV-K84/85 1xEV-DO BTS/MS Analysis R&S FSV-K91 WLAN IEEE 802.11 R&S FSV-K93 WiMAX IEEE 802.16 OFDM/OFDMA Analysis R&S FSV-K100/K104 EUTRA / LTE Downlink Measurement Application R&S FSV-K101/K105 EUTRA / LTE Uplink Measurement Application

These manuals are available in PDF format on the CD delivered with the instrument.

Service Manual

This manual is available in PDF format on the CD delivered with the instrument. It describes how to check compliance with rated specifications, instrument function, repair, troubleshooting and fault elimination. It contains all information required for repairing the R&S FSV/FSVA by replacing modules. The manual includes the following chapters:

Chapter 1 Performance Test

Chapter 2 Adjustment

Chapter 3 Repair

Chapter 4 Software Update / Installing Options

Chapter 5 Documents

Online Help

The online help contains context-specific help on operating the R&S FSV/FSVA and all available options. It describes both manual and remote operation. The online help is installed on the R&S FSV/FSVA by default, and is also available as an executable .chm file on the CD delivered with the instrument.

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Release Notes

The release notes describe the installation of the firmware, new and modified functions, eliminated problems, and last minute changes to the documentation. The corresponding firmware version is indicated on the title page of the release notes. The current release notes are provided in the Internet.

Preface

Conventions Used in the Documentation

1.2 Conventions Used in the Documentation

1.2.1 Typographical Conventions

The following text markers are used throughout this documentation:

Convention Description

"Graphical user interface elements"

KEYS Key names are written in capital letters.

File names, commands, program code

Input Input to be entered by the user is displayed in italics.

Links Links that you can click are displayed in blue font.

"References" References to other parts of the documentation are enclosed by quota-

All names of graphical user interface elements on the screen, such as dialog boxes, menus, options, buttons, and softkeys are enclosed by quotation marks.

File names, commands, coding samples and screen output are distinguished by their font.

tion marks.

1.2.2 Conventions for Procedure Descriptions

When describing how to operate the instrument, several alternative methods may be available to perform the same task. In this case, the procedure using the touchscreen is described. Any elements that can be activated by touching can also be clicked using an additionally connected mouse. The alternative procedure using the keys on the instrument or the on-screen keyboard is only described if it deviates from the standard operating procedures.

The term "select" may refer to any of the described methods, i.e. using a finger on the touchscreen, a mouse pointer in the display, or a key on the instrument or on a keyboard.

1.2.3 Notes on Screenshots

When describing the functions of the product, we use sample screenshots. These screenshots are meant to illustrate as much as possible of the provided functions and possible interdependencies between parameters.

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The screenshots usually show a fully equipped product, that is: with all options installed. Thus, some functions shown in the screenshots may not be available in your particular product configuration.

Preface

How to Use the Help System

1.3 How to Use the Help System

Calling context-sensitive and general help

► To display the general help dialog box, press the HELP key on the front panel.

The help dialog box "View" tab is displayed. A topic containing information about the current menu or the currently opened dialog box and its function is displayed.

For standard Windows dialog boxes (e.g. File Properties, Print dialog etc.), no contextsensitive help is available.

► If the help is already displayed, press the softkey for which you want to display

help. A topic containing information about the softkey and its function is displayed.

If a softkey opens a submenu and you press the softkey a second time, the submenu of the softkey is displayed.

Contents of the help dialog box

The help dialog box contains four tabs:

●

"Contents" - contains a table of help contents

●

"View" - contains a specific help topic

●

"Index" - contains index entries to search for help topics

●

"Zoom" - contains zoom functions for the help display

To change between these tabs, press the tab on the touchscreen.

Navigating in the table of contents

●

To move through the displayed contents entries, use the UP ARROW and DOWN ARROW keys. Entries that contain further entries are marked with a plus sign.

●

To display a help topic, press the ENTER key. The "View" tab with the corresponding help topic is displayed.

●

To change to the next tab, press the tab on the touchscreen.

Navigating in the help topics

●

To scroll through a page, use the rotary knob or the UP ARROW and DOWN ARROW keys.

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●

Searching for a topic

1. Change to the "Index" tab.

2. Enter the first characters of the topic you are interested in. The entries starting with

3. Change the focus by pressing the ENTER key.

4. Select the suitable keyword by using the UP ARROW or DOWN ARROW keys or

5. Press the ENTER key to display the help topic.

Changing the zoom

1. Change to the "Zoom" tab.

Preface

Notes for Users of R&S FSV 1307.9002Kxx Models

To jump to the linked topic, press the link text on the touchscreen.

these characters are displayed.

the rotary knob.

The "View" tab with the corresponding help topic is displayed.

2. Set the zoom using the rotary knob. Four settings are available: 1-4. The smallest size is selected by number 1, the largest size is selected by number 4.

Closing the help window

► Press the ESC key or a function key on the front panel.

1.4 Notes for Users of R&S FSV 1307.9002Kxx Models

Users of R&S FSV 1307.9002Kxx models should consider the following differences to the description of the newer R&S FSV/FSVA 1321.3008Kxx models:

●

Functions that are based on the Windows7 operating system (e.g. printing or setting up networks) may have a slightly different appearance or require different settings on the Windows XP based models. For such functions, refer to the Windows documentation or the documentation originally provided with the R&S FSV instrument.

●

The R&S FSV 1307.9002K03 model is restricted to a maximum frequency of 3 GHz, whereas the R&S FSV/FSVA1321.3008K04 model has a maximum frequency of 4 GHz.

●

The bandwidth extension option R&S FSV-B160 (1311.2015.xx) is not available for the R&S FSV 1307.9002Kxx models. The maximum usable I/Q analysis bandwidth for these models is 28 MHz, or with option R&S FSV-B70, 40 MHz.

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2 Introduction

Overview of Firmware Options R&S FSV-K84/-K85

This section contains all information required for operation of an R&S FSV/FSVA equipped with Application Firmware R&S FSV-K84 or -K85. It covers operation via menus and the remote control commands for the 1xEV-DO Analysis.

This part of the documentation consists of the following chapters:

●

Introduction

Chapter 3, "Measurement Examples for the 1xEV-DO BTS Analysis (K84)",

on page 11 Explains some basic 1xEV-DO base station tests.

Chapter 4, "Measurement Examples for the 1xEV-DO MS Analysis (K85)",

on page 20 Explains some basic 1xEV-DO mobile station tests.

Chapter 5, "Test Setup for Base Station and Mobile Station Tests", on page 29

Describes the measurement setup for base station and mobile station tests.

Chapter 6, "Instrument Functions of the 1xEV-DO Analysis", on page 31

Describes the instrument functions of 1xEV-DO Analysis.

Chapter 7, "Remote Commands of the 1xEV-DO Analysis", on page 199

Describes all remote control commands defined for the code domain measurement. An alphabetic list of all remote control commands and a table of softkeys with the assignment of commands are provided at the end of this chapter.

Chapter 8, "Status Reporting System of the 1xEV-DO Analysis", on page 345

Contains device-specific error messages for R&S FSV-K84/-K85.

This part of the documentation includes only functions of the Application Firmware R&S FSV-K84/-K85. For all other descriptions, please refer to the description of the base unit.

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3 Measurement Examples for the 1xEV-DO

BTS Analysis (K84)

Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Signal Channel Power

3.1 Measuring the Signal Channel Power

In the Power measurement, the total channel power of the 1xEV-DO signal is displayed. The measurement also displays spurious emissions like harmonics or intermodulation products that occur close to the carrier.

Test setup:

●

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA (coaxial cable with N connectors).

Signal generator settings:

Frequency: 878.49 MHz

Level: 0 dBm

Standard: 1xEV-DO BTS

Procedure:

1. Set the R&S FSV/FSVA to its default state. a) Press the PRESET key.

2. Activate the "1xEV-DO BTS Analysis" mode. a) Press the MODE key and activate the "1xEV-DO BTS Analysis" option.

3. Start the Power measurement a) Press the MEAS key.

b) Press the "Power" softkey.

4. Set the center frequency. a) Press the FREQ key and enter 878.49 MHz.

5. Set the reference level. a) Press the AMPT key and enter 0 dBm.

On the screen, the spectrum of the signal and the corresponding power levels within the 1.2288 MHz channel bandwidth are displayed. In the table below the diagram, the numeric values of the channel bandwidth of the TX Channel and power level of the analyzed signal are listed.

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Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Spectrum Emission Mask

3.2 Measuring the Spectrum Emission Mask

To detect spurious emissions such as harmonics or intermodulation products, the R&S FSV/FSVA offers a spectrum emission mask measurement. The measurement compares the power against the spectrum emission mask in the range from -4 MHz to 4 MHz around the carrier. The exact measurement settings like the filter that is used depend on the Band Class parameter. For a list of supported bandclasses refer to the

"Bandclass" on page 124 softkey in the "Spectrum Emission Mask" menu.

Test setup:

●

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA (coaxial cable with N connectors).

Signal generator settings:

Frequency: 878.49 MHz

Level: 0 dBm

Standard: 1xEV-DO BTS

Procedure:

1. Set the R&S FSV/FSVA to its default state. a) Press the PRESET key.

2. Select the "1xEV-DO BTS Analysis" mode. a) Press the MODE key and select the "1xEV-DO BTS Analysis" option.

3. Start the measurement. a) Press the MEAS key.

b) Press the "Spectrum Emission Mask" softkey.

4. Set the center frequency. a) Press the FREQ key and enter 878.49 MHz.

5. Set the reference level. a) Press the AMPT key and enter 0 dBm.

6. Select a bandclass a) Press the "Bandclass" softkey and select BandClass 0: 800 MHz Cellular Band

from the list.

On the screen, the spectrum of the signal is displayed, including the limit line defined in the standard. To understand where and about how much the measurement has failed, the List Evaluation table shows the frequencies where spurious emissions occur.

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Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Relative Code Domain Power and the Frequency Error

3.3 Measuring the Relative Code Domain Power and the Frequency Error

A Code Domain Power measurement analyses the signal over a single slot. It also determines the power of all codes and channels.

The following examples show a Code Domain Power measurement on a test model with 9 channels. In this measurement, changing some parameters one after the other should demonstrate the resulting effects: values adapted to the measurement signal are changed to non-adapted values.

In the following examples, adjusting the settings of the code domain measurements is described using the dialog boxes. Alternatively, most of the settings can also be modified by using the corresponding hardkeys as in the base unit (e.g. the center frequency can be either set in the "Frontend Settings" dialog box, or via the FREQ key).

Test setup:

●

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA.

●

Connect the reference input (EXT REF) on the rear panel of the R&S FSV/FSVA to the reference output (REF) of the signal generator (coaxial cable with BNC connectors).

Signal generator settings:

Frequency: 878.49 MHz

Level: 0 dBm

Standard: 1xEV-DO BTS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Select the "1xEV-DO BTS Analysis" mode.

a) Press the MODE key and select "1xEV-DO BTS Analysis".

3. Select the Code Domain Analyzer.

a) Press the MEAS key b) Press the "Code Domain Analyzer" softkey.

4. Start the measurement

a) In the "Code Domain Analyzer" menu, press the "Display Config" softkey. b) Select the "Code Domain Power" measurement.

5. Set the center frequency and the reference level.

a) In the "Code Domain Analyzer" menu, press the "Frontend Settings" softkey.

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In the two screens, the following results are displayed: screen A shows the power of the code domain of the signal. The x-axis represents the individual channels (or codes), while the y-axis shows the power of each channel.

In screen B the result summary is displayed. It shows the numeric results of the code domain power measurement, including the frequency error.

By default, the R&S FSV-K84 displays two measurement screens. After a preset the first (screen A) is always the Code Domain Power result display. The second (screen B) is always the Result Display

For more information on the display concept refer to the "Display Config" on page 85 softkey.

Synchronization of the reference frequencies

Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Relative Code Domain Power and the Frequency Error

b) In the "Center Frequency" field enter 878.49 MHz. c) In the "Ref Level" field enter 10 dBm. d) Close the "Frontend Settings" dialog box.

The frequency error can be reduced by synchronizing the transmitter and the receiver to the same reference frequency.

► Press the SETUP key.

a) Press the "Reference Int/Ext" softkey to switch to an external reference.

Screen A again shows the Code Domain Power measurement and screen B the result summary. After the synchronization of the reference frequencies of the devices, the frequency error should now be smaller than 10 Hz.

Behavior with deviating center frequency setting

A measurement can only be valid if the center frequency of the DUT and the analyzer are balanced.

► On the signal generator, change the center frequency in steps of 0.1 kHz and

observe the analyzer screen. Up to a frequency error of approximately 1.0 kHz, a Code Domain Power measurement on the R&S FSV/FSVA is still possible. A frequency error within this range causes no apparent difference in the accuracy of the Code Domain Power measurement. In case of a frequency error of more than 1.0 kHz, the probability of incorrect synchronization increases. This is indicated by the SYNC FAILED error message. If the frequency error exceeds approximately 1.5 kHz, a Code Domain Power measurement cannot be performed. This is also indicated by the SYNC FAILED error message. Reset the center frequency of the signal generator to 878.49 MHz.

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The center frequency of the DUT should not deviate by more than 1.0 kHz from that of the R&S FSV/FSVA

Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Triggered Relative Code Domain Power

3.4 Measuring the Triggered Relative Code Domain Power

If the code domain power measurement is performed without external triggering, a section of the test signal is recorded at an arbitrary point of time and the firmware attempts to detect the start of a slot. To detect this start, all possibilities of the PN sequence location have to be tested in Free Run trigger mode. This requires computing time. This computing time can be reduced by using an external (frame) trigger and entering the correct PN offset. If the search range for the start of the power control group and the PN offset are known then fewer possibilities have to be tested. This increases the measurement speed.

Test setup:

●

Connect the RF output of the signal generator to the input of the R&S FSV/FSVA.

●

Connect the reference input (EXT REF) on the rear panel of the R&S FSV/FSVA to the reference input of the signal generator (coaxial cable with BNC connectors).

●

Connect the external trigger input on the rear panel of the R&S FSV/FSVA (EXT TRIGGER/GATE IN) to the external trigger output of the signal generator.

Signal generator settings (e.g. R&S SMU):

Frequency: 878.49 MHz

Level: 0 dBm

Standard: 1xEV-DO BTS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Select the "1xEV-DO BTS Analysis" Mode.

a) Press the MODE key and select 1xEV-DO BTS Analysis.

3. Select the Code Domain Analyzer.

a) Press the MEAS key b) Press the "Code Domain Analyzer" softkey.

4. Start the measurement.

a) In the "Code Domain Analyzer" menu, press the "Display Config" softkey. b) Select the tab for Screen A. c) Select the "Code Domain Power" measurement.

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5. Set the center frequency and the reference level.

In the two screens, the following results are displayed: by default, screen A shows the code domain power of the signal. Compared to the measurement without an external trigger (see previous example), the repetition rate of the measurement increases. In screen B the result summary is displayed. In the row Trigger to Frame, the offset between the trigger event and and the start of the slot is shown.

Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Triggered Relative Code Domain Power

a) In the "Code Domain Analyzer" menu, press the "Frontend Settings" softkey. b) In the "Center Frequency" field enter 878.49 MHz. c) In the "Ref Level" field enter 10 dBm. d) Close the "Frontend Settings" dialog box.

3.4.1 Adjusting the Trigger Offset

The delay between the trigger event and the start of the slot can be compensated for by adjusting the trigger offset.

●

Set an external trigger source and the trigger offset. – Open the IQ Capture dialog box. – Set the "Trigger Source" option to "External". – Set the "Trigger Offset" to 100µs to compensate analog delays of the trigger

event.

In the two screens, the following results are displayed: Screen A shows the the same as above. In screen B the result summary is displayed. In the Trigger to Frame result, the offset between the trigger event and the start of the slot has been adjusted.

3.4.2 Behaviour With the Wrong PN Offset

The last adjustment is setting the PN (Pseudo Noise) offset correctly. The measurement can only be valid, if the PN offset on the analyzer is the same as that of the transmit signal.

●

Set a PN Offset. – Open the "Result Settings" dialog box. – In the "PN Offset" field enter 200.

Again, screen A shows the CDP measurement, screen B the result summary. In the result summary, the Trigger to Frame result is not correct. Also, the error message SYNC FAILED indicates that the synchronization has failed.

– In the "PN Offset" field enter 0.

After adjusting it, the PN offset on the R&S FSV/FSVA is the same as that of the signal. In the result summary the "Trigger to Frame" value is now shown correctly.

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Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Composite EVM

3.5 Measuring the Composite EVM

The Error Vector Magnitude (EVM) describes the quality of the measured signal compared to an ideal reference signal generated by the R&S FSV/FSVA. In the I-Q plane, the error vector represents the ratio of the measured signal to the ideal signal on symbol level. The error vector is equal to the square root of the ratio of the measured signal to the reference signal. The result is given in %.

In the Composite EVM measurement the error is averaged over all channels (by means of the root mean square) for a given slot. The measurement covers the entire signal during the entire observation time. On screen the results are shown in a diagram, in which the x-axis represents the examined slots and the y-axis shows the EVM values.

Test Setup:

●

Connect the RF output of the Signal Generator to the RF input of the R&S FSV/ FSVA. (coaxial cables with N connectors).

●

Connect the reference input (EXT REF IN/OUT) on the rear panel of the R&S FSV/ FSVA to the reference output (REF) on the signal generator (coaxial cable with BNC connectors).

●

Connect external triggering of the analyzer (EXT TRIG GATE) to the signal generator’s trigger (TRIGOUT1 at PAR DATA).

Signal generator settings:

Frequency: 878.49 MHz

Level: 0 dBm

Standard: 1xEV-DO BTS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Select the "1xEV-DO BTS Analysis" Mode.

a) Press the MODE key and select 1xEV-DO BTS Analysis.

3. Select the Code Domain Analyzer.

a) Press the MEAS key b) Press the "Code Domain Analyzer" softkey.

4. Start the measurement.

a) Press the "Display Config" softkey. b) Select the tab for Screen A. c) Select the "Composite EVM" measurement.

5. Set the center frequency and the reference level.

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6. Set an external trigger source.

In the two screens, the following results are displayed: by default, Screen A shows the diagram of the Composite EVM measurement result. In screen B the result summary is displayed. It shows the numeric results of the Code Domain Power measurement, including the values for the Composite EVM.

Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Peak Code Domain Error

a) Open the "Frontend Settings" dialog box. b) In the "Center Frequency" field enter 878.49 MHz. c) In the "Ref Level" field enter 10 dBm. d) Close the "Frontend Settings" dialog box.

a) Open the "IQ Capture Settings" dialog box. b) Set the "Trigger Source" option to "External".

3.6 Measuring the Peak Code Domain Error

The Code Domain Error Power describes the quality of the measured signal compared to an ideal reference signal generated by the R&S FSV/FSVA. In the I-Q plane, the error vector represents the difference of the measured signal and the ideal signal. The Code Domain Error is the difference in power on symbol level of the measured and the reference signal projected to the class of of the base spreading factor. The unit of the result is dB.

In the Peak Code Domain Error (PCDE) measurement, the maximum error value over all channels is determined and displayed for a given slot. The measurement covers the entire signal during the entire observation time. On screen the results are shown in a diagram, in which the x-axis represents the slots and the y-axis shows the PCDE values.

A measurement of the RHO factor is shown in the second part of the example. RHO is the normalized, correlated power between the measured and the ideal reference signal. The maximum value of RHO is 1. In that case the measured signal and the reference signal are identical. When measuring RHO, it is required that only the pilot channel is active.

Test setup:

●

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA (coaxial cable with N connectors).

●

Connect the reference input (EXT REF IN/OUT) on the rear panel of the R&S FSV/ FSVA to the reference output (REF) on the signal generator (coaxial cable with BNC connectors).

●

Connect external triggering of the R&S FSV/FSVA (EXT TRIG GATE) to the signal generator trigger (TRIGOUT1 at PAR DATA).

Signal generator settings:

Frequency: 878.49 MHz

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Level: 0 dBm

Standard: 1xEV-DO BTS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

2. Select the "1xEV-DO BTS Analysis" mode.

3. Select the Code Domain Analyzer.

4. Start the Peak Code Domain Error measurement.

Measurement Examples for the 1xEV-DO BTS Analysis (K84)

Measuring the Peak Code Domain Error

a) Press the PRESET key.

a) Press the MODE key and select the "1xEV-DO BTS Analysis" option.

a) Press the MEAS key. b) Press the "Code Domain Analyzer" softkey.

a) Press the "Display Config" softkey b) Select the tab for Screen A. c) Select the "Peak Code Domain Error" softkey and start the measurement.

5. Set the center frequency and the reference level.

a) Open the "Frontend Settings" dialog box. b) In the "Center Frequency" field enter 878.49 MHz. c) In the "Ref Level" field enter 0 dBm. d) Close the "Frontend Settings" dialog box.

6. Set an external trigger source.

a) Open the "IQ Capture Settings" dialog box. b) Set the "Trigger Source" option to "External".

In the two screens, the following results are displayed: by default, screen A shows the diagram of the Peak Code Domain Error. In screen B the result summary is displayed.

Displaying RHO

Make sure that all channels except the pilot channel (code 0.64) are OFF, so that only the pilot channel is available in the measurement.

No specific measurement is required to get the value for RHO. The R&S FSV/FSVA always calculates this value automatically regardless of the code domain measurement performed. Besides the results of the code domain measurements, the numeric result of the RHO measurement is shown in the result summary, by default shown in screen B.

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4 Measurement Examples for the 1xEV-DO

MS Analysis (K85)

Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Signal Channel Power

4.1 Measuring the Signal Channel Power

In the Power measurement, the total channel power of the 1xEV-DO signal is displayed. The measurement also displays spurious emissions like harmonics or intermodulation products that occur close to the carrier.

Test setup:

●

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA (coaxial cable with N connectors).

Signal generator settings:

Frequency: 833.49 MHz

Level: 0 dBm

Standard: 1xEV-DO MS MS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Activate the "1xEV-DO MS Analysis" mode.

a) Press the MODE key and activate the "1xEV-DO MS Analysis" option.

3. Start the Power measurement

a) Press the MEAS key. b) Press the "Power" softkey.

4. Set the center frequency.

a) Press the FREQ key and enter 833.49 MHz.

5. Set the reference level.

a) Press the AMPT key and enter 0 dBm.

On the screen, the spectrum of the signal and the corresponding power levels within the 1.2288 MHz channel bandwidth are displayed. In the table below the diagram, the numeric values of the channel bandwidth of the TX Channel and power level of the analyzed signal are listed.

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Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Spectrum Emission Mask

4.2 Measuring the Spectrum Emission Mask

To detect spurious emissions such as harmonics or intermodulation products, the R&S FSV/FSVA offers a spectrum emission mask measurement. The measurement compares the power against the spectrum emission mask in the range from -4 MHz to 4 MHz around the carrier. The exact measurement settings like the filter that is used depend on the Band Class parameter. For a list of supported bandclasses refer to the

"Bandclass" on page 124 softkey in the "Spectrum Emission Mask" menu.

Test setup:

●

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA (coaxial cable with N connectors).

Signal generator settings:

Frequency: 833.49 MHz

Level: 0 dBm

Standard: 1xEV-DO MS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Select the "1xEV-DO MS Analysis" mode.

a) Press the MODE key and select the "1xEV-DO MS Analysis" option.

3. Start the measurement.

a) Press the MEAS key. b) Press the "Spectrum Emission Mask" softkey.

4. Set the center frequency.

a) Press the FREQ key and enter 833.49 MHz.

5. Set the reference level.

a) Press the AMPT key and enter 0 dBm.

6. Select a bandclass

a) Press the "Bandclass" softkey and select BandClass 0: 800 MHz Cellular Band

from the list.

On the screen, the spectrum of the signal is displayed, including the limit line defined in the standard. To understand where and about how much the measurement has failed, the List Evaluation table shows the frequencies where spurious emissions occur.

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Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Relative Code Domain Power and the Frequency Error

4.3 Measuring the Relative Code Domain Power and the Frequency Error

A Code Domain Power measurement analyses the signal over a single slot. It also determines the power of all codes and channels.

The following examples show a Code Domain Power measurement on a test model with 9 channels. In this measurement, changing some parameters one after the other should demonstrate the resulting effects: values adapted to the measurement signal are changed to non-adapted values.

In the following examples, adjusting the settings of the code domain measurements is described using the dialog boxes. Alternatively, most of the settings can also be modified by using the corresponding hardkeys as in the base unit (e.g. the center frequency can be either set in the "Frontend Settings" dialog box, or via the FREQ key).

Test setup:

●

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA.

●

Connect the reference input (EXT REF) on the rear panel of the R&S FSV/FSVA to the reference output (REF) of the signal generator (coaxial cable with BNC connectors).

Signal generator settings:

Frequency: 833.49 MHz

Level: 0 dBm

Standard: 1xEV-DO MS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Select the "1xEV-DO MS Analysis" mode.

a) Press the MODE key and select "1xEV-DO MS Analysis".

3. Select the Code Domain Analyzer.

a) Press the MEAS key b) Press the "Code Domain Analyzer" softkey.

4. Start the measurement

a) In the "Code Domain Analyzer" menu, press the "Display Config" softkey. b) Select the "Code Domain Power" measurement.

5. Set the center frequency and the reference level.

a) In the "Code Domain Analyzer" menu, press the "Frontend Settings" softkey.

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In the two screens, the following results are displayed: screen A shows the power of the code domain of the signal. The x-axis represents the individual channels (or codes), while the y-axis shows the power of each channel.

In screen B the result summary is displayed. It shows the numeric results of the code domain power measurement, including the frequency error.

Synchronization of the reference frequencies

The frequency error can be reduced by synchronizing the transmitter and the receiver to the same reference frequency.

► Press the SETUP key.

Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Relative Code Domain Power and the Frequency Error

b) In the "Center Frequency" field enter 833.49 MHz. c) In the "Ref Level" field enter 10 dBm. d) Close the "Frontend Settings" dialog box.

a) Press the "Reference Int/Ext" softkey to switch to an external reference.

Screen A again shows the Code Domain Power measurement and screen B the result summary. After the synchronization of the reference frequencies of the devices, the frequency error should now be smaller than 10 Hz.

Behavior with deviating center frequency setting

A measurement can only be valid if the center frequency of the DUT and the analyzer are balanced.

► On the signal generator, change the center frequency in steps of 0.1 kHz and

observe the analyzer screen. Up to a frequency error of approximately 4.0 kHz, a Code Domain Power measurement on the R&S FSV/FSVA is still possible. A frequency error within this range causes no apparent difference in the accuracy of the Code Domain Power measurement. In case of a frequency error of more than 4.3 kHz, the probability of incorrect synchronization increases. This is indicated by the SYNC FAILED error message. If the frequency error exceeds approximately 4.3 kHz, a Code Domain Power measurement cannot be performed. This is also indicated by the SYNC FAILED error message. Reset the center frequency of the signal generator to 833.49 MHz.

The center frequency of the DUT should not deviate by more than 4.0 kHz from that of the R&S FSV/FSVA.

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Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Triggered Relative Code Domain Power

4.4 Measuring the Triggered Relative Code Domain Power

If the code domain power measurement is performed without external triggering, a section of the test signal is recorded at an arbitrary point of time and the firmware attempts to detect the start of a slot. To detect this start, all possibilities of the PN sequence location have to be tested in Free Run trigger mode. This requires computing time. This computing time can be reduced by using an external (frame) trigger and entering the correct PN offset. If the search range for the start of the power control group and the PN offset are known then fewer possibilities have to be tested. This increases the measurement speed.

Test setup:

●

Connect the RF output of the signal generator to the input of the R&S FSV/FSVA.

●

Connect the reference input (EXT REF) on the rear panel of the R&S FSV/FSVA to the reference input of the signal generator (coaxial cable with BNC connectors).

●

Connect the external trigger input on the rear panel of the R&S FSV/FSVA (EXT TRIGGER/GATE IN) to the external trigger output of the signal generator.

Signal generator settings (e.g. R&S SMU):

Frequency: 833.49 MHz

Level: 0 dBm

Standard: 1xEV-0DO

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Select the "1xEV-DO MS Analysis" Mode.

a) Press the MODE key and select 1xEV-DO MS Analysis.

3. Select the Code Domain Analyzer.

a) Press the MEAS key b) Press the "Code Domain Analyzer" softkey.

4. Start the measurement.

a) In the "Code Domain Analyzer" menu, press the "Display Config" softkey. b) Select the tab for Screen A. c) Select the "Code Domain Power" measurement.

5. Set the center frequency and the reference level.

a) In the "Code Domain Analyzer" menu, press the "Frontend Settings" softkey. b) In the "Center Frequency" field enter 833.49 MHz. c) In the "Ref Level" field enter 10 dBm.

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In the two screens, the following results are displayed: by default, screen A shows the code domain power of the signal. Compared to the measurement without an external trigger (see previous example), the repetition rate of the measurement increases. In screen B the result summary is displayed. In the row Trigger to Frame, the offset between the trigger event and and the start of the slot is shown.

Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Composite EVM

d) Close the "Frontend Settings" dialog box.

4.4.1 Adjusting the Trigger Offset

The delay between the trigger event and the start of the slot can be compensated for by adjusting the trigger offset.

●

Set an external trigger source and the trigger offset. – Open the IQ Capture dialog box. – Set the "Trigger Source" option to "External". – Set the "Trigger Offset" to 100µs to compensate analog delays of the trigger

event.

In the two screens, the following results are displayed: Screen A shows the the same as above. In screen B the result summary is displayed. In the Trigger to Frame result, the offset between the trigger event and the start of the slot has been adjusted.

4.5 Measuring the Composite EVM

The Error Vector Magnitude (EVM) describes the quality of the measured signal compared to an ideal reference signal generated by the R&S FSV/FSVA. In the I-Q plane, the error vector represents the ratio of the measured signal to the ideal signal on symbol level. The error vector is equal to the square root of the ratio of the measured signal to the reference signal. The result is given in %.

In the Composite EVM measurement the error is averaged over all channels (by means of the root mean square) for a given slot. The measurement covers the entire signal during the entire observation time. On screen the results are shown in a diagram, in which the x-axis represents the examined slots and the y-axis shows the EVM values.

Test Setup:

●

Connect the RF output of the Signal Generator to the RF input of the R&S FSV/ FSVA. (coaxial cables with N connectors).

●

Connect the reference input (EXT REF IN/OUT) on the rear panel of the R&S FSV/ FSVA to the reference output (REF) on the signal generator (coaxial cable with BNC connectors).

●

Connect external triggering of the analyzer (EXT TRIG GATE) to the signal generator’s trigger (TRIGOUT1 at PAR DATA).

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Signal generator settings:

Frequency: 833.49 MHz

Level: 0 dBm

Standard: 1xEV-DO MS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

2. Select the "1xEV-DO MS Analysis" Mode.

3. Select the Code Domain Analyzer.

Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Peak Code Domain Error

a) Press the PRESET key.

a) Press the MODE key and select 1xEV-DO MS Analysis.

a) Press the MEAS key b) Press the "Code Domain Analyzer" softkey.

4. Start the measurement.

a) Press the "Display Config" softkey. b) Select the tab for Screen A. c) Select the "Composite EVM" measurement.

5. Set the center frequency and the reference level.

a) Open the "Frontend Settings" dialog box. b) In the "Center Frequency" field enter 833.49 MHz. c) In the "Ref Level" field enter 10 dBm. d) Close the "Frontend Settings" dialog box.

6. Set an external trigger source.

a) Open the "IQ Capture Settings" dialog box. b) Set the "Trigger Source" option to "External".

In the two screens, the following results are displayed: by default, Screen A shows the diagram of the Composite EVM measurement result. In screen B the result summary is displayed. It shows the numeric results of the Code Domain Power measurement, including the values for the Composite EVM.

4.6 Measuring the Peak Code Domain Error

The Code Domain Error Power describes the quality of the measured signal compared to an ideal reference signal generated by the R&S FSV/FSVA. In the I-Q plane, the error vector represents the difference of the measured signal and the ideal signal. The Code Domain Error is the difference in power on symbol level of the measured and the reference signal projected to the class of of the base spreading factor. The unit of the result is dB.

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In the Peak Code Domain Error (PCDE) measurement, the maximum error value over all channels is determined and displayed for a given slot. The measurement covers the entire signal during the entire observation time. On screen the results are shown in a diagram, in which the x-axis represents the slots and the y-axis shows the PCDE values.

A measurement of the RHO factor is shown in the second part of the example. RHO is the normalized, correlated power between the measured and the ideal reference signal. The maximum value of RHO is 1. In that case the measured signal and the reference signal are identical. When measuring RHO, it is required that only the pilot channel is active.

Test setup:

●

Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Peak Code Domain Error

Connect the RF output of the signal generator to the RF input of the R&S FSV/ FSVA (coaxial cable with N connectors).

Connect the reference input (EXT REF IN/OUT) on the rear panel of the R&S FSV/ FSVA to the reference output (REF) on the signal generator (coaxial cable with BNC connectors).

Connect external triggering of the R&S FSV/FSVA (EXT TRIG GATE) to the signal generator trigger (TRIGOUT1 at PAR DATA).

Signal generator settings:

Frequency: 833.49 MHz

Level: 0 dBm

Standard: 1xEV-DO MS

Procedure:

1. Set the R&S FSV/FSVA to its default state.

a) Press the PRESET key.

2. Select the "1xEV-DO MS Analysis" mode.

a) Press the MODE key and select the "1xEV-DO MS Analysis" option.

3. Select the Code Domain Analyzer.

a) Press the MEAS key. b) Press the "Code Domain Analyzer" softkey.

4. Start the Peak Code Domain Error measurement.

a) Press the "Display Config" softkey b) Select the tab for Screen A. c) Select the "Peak Code Domain Error" softkey and start the measurement.

5. Set the center frequency and the reference level.

a) Open the "Frontend Settings" dialog box. b) In the "Center Frequency" field enter 833.49 MHz. c) In the "Ref Level" field enter 0 dBm.

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6. Set an external trigger source.

In the two screens, the following results are displayed: by default, screen A shows the diagram of the Peak Code Domain Error. In screen B the result summary is displayed.

Displaying RHO

Make sure that all channels except the pilot channel (code 0.64) are OFF, so that only the pilot channel is available in the measurement.

No specific measurement is required to get the value for RHO. The R&S FSV/FSVA always calculates this value automatically regardless of the code domain measurement performed. Besides the results of the code domain measurements, the numeric result of the RHO measurement is shown in the result summary, by default shown in screen B.

Measurement Examples for the 1xEV-DO MS Analysis (K85)

Measuring the Peak Code Domain Error

d) Close the "Frontend Settings" dialog box.

a) Open the "IQ Capture Settings" dialog box. b) Set the "Trigger Source" option to "External".

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5 Test Setup for Base Station and Mobile Sta-

tion Tests

This section describes the default settings of the R&S FSV/FSVA, if it is used as a 1xEV-DO base station or mobile station tester. Before starting the measurements, the R&S FSV/FSVA has to be configured correctly and supplied with power as described in the Quick Start Guide, "Preparing For Use". Furthermore, the application firmware of the R&S FSV-K84 (base station tests) or -K85 (mobile station tests) must be enabled. Installation and enabling of the application firmware are described in the Quick Start Guide, chapter 3.

Risk of instrument damage during operation

An unsuitable operating site or test setup can cause damage to the instrument and to connected devices. Ensure the following operating conditions before you switch on the instrument:

●

Test Setup for Base Station and Mobile Station Tests

All fan openings are unobstructed and the airflow perforations are unimpeded. The minimum distance from the wall is 10 cm.

The instrument is dry and shows no sign of condensation. The instrument is positioned as described in the following sections. The ambient temperature does not exceed the range specified in the data sheet. Signal levels at the input connectors are all within the specified ranges. Signal outputs are correctly connected and are not overloaded.

Connect the antenna output (or TX output) of the base/mobile station to the RF input of the R&S FSV/FSVA. Use a power attenuator exhibiting suitable attenuation.

The following values for external attenuation are recommended to ensure that the RF input of the analyzer is protected and the sensitivity of the unit is not reduced too much:

Maximum Power Recommended external attenuation

≥ 55 to 60 dBm 35 to 40 dB

≥ 50 to 55 dBm 30 to 35 dB

≥ 45 to 50 dBm 25 to 30 dB

≥ 40 to 45 dBm 20 to 25 dB

≥ 35 to 40 dBm 15 to 20 dB

≥ 30 to 35 dBm 10 to 15 dB

≥ 25 to 30 dBm 0 to 10 dB

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Maximum Power Recommended external attenuation

≥ 20 to 25 dBm 0 to 5 dB

< 20 dBm 0 dB

●

Presettings

1. Enter the external attenuation.

Test Setup for Base Station and Mobile Station Tests

For signal measurements at the output of two-port networks, connect the reference frequency of the signal source to the rear reference input of the analyzer.

The R&S FSV/FSVA must be operated with an external frequency reference to ensure that the error limits of the 1xEV-DO specification for frequency measurements on base stations/mobile stations are met. A rubidium frequency standard can be used as a reference source for example.

If the base station or mobile station has a trigger output, connect the trigger output of the base station/mobile station to the rear trigger input of the analyzer (EXT TRIG GATE).

2. Enter the reference level.

3. Enter the center frequency.

4. Set the trigger.

5. If used, enable the external reference.

6. Select the standard and the desired measurement.

7. Set the PN offset.

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Rohde&Schwarz FSV-K84, FSV-K85 Operating Manual

Specifications and Main Features

Frequently Asked Questions

User Manual

Contents

1 Preface

1.1 Documentation Overview

1.2 Conventions Used in the Documentation

1.2.1 Typographical Conventions

1.2.2 Conventions for Procedure Descriptions

1.2.3 Notes on Screenshots

1.3 How to Use the Help System

1.4 Notes for Users of R&S FSV 1307.9002Kxx Models

2 Introduction

Measurement Examples for the 1xEV-DO BTS Analysis (K84)

3.1 Measuring the Signal Channel Power

3.2 Measuring the Spectrum Emission Mask

3.3 Measuring the Relative Code Domain Power and the Frequency Error

3.4 Measuring the Triggered Relative Code Domain Power

3.4.1 Adjusting the Trigger Offset

3.4.2 Behaviour With the Wrong PN Offset

3.5 Measuring the Composite EVM

3.6 Measuring the Peak Code Domain Error

Measurement Examples for the 1xEV-DO MS Analysis (K85)

4.1 Measuring the Signal Channel Power

4.2 Measuring the Spectrum Emission Mask

4.3 Measuring the Relative Code Domain Power and the Frequency Error

4.4 Measuring the Triggered Relative Code Domain Power

4.4.1 Adjusting the Trigger Offset

4.5 Measuring the Composite EVM

4.6 Measuring the Peak Code Domain Error

Test Setup for Base Station and Mobile Station Tests