Spirent communications SR5500 Manuel utilisateur

SR5500

Wireless Channel Emulator

Operations Manual

Safety Summary

If the equipment is used in a manner not specified by the manufacturer the protection provided by the

equipment may be impaired.

Safety Symbols

The following safety symbols are used throughout this manual and may be found on the instrument. Familiarize

yourself with each symbol and its meaning before operating this instrument.

Instruction manual symbol. The

product is marked with this symbol

when it is necessary for you to refer to

the instruction manual to protect

against damage to the instrument.

Frame terminal. A connection to

the frame (chassis) of the

equipment which normally includes

all exposed metal structures.

Protective ground (earth) terminal.

Used to identify any terminal which is

intended for connection to an external

protective conductor for protection

against electrical shock in case of a

fault, or to the terminal of a protective

ground (earth) electrode.

The caution sign denotes a hazard.

It calls attention to an operating

procedure, practice, condition or

the like, which, if not correctly

performed or adhered to, could

result in damage to or destruction

of part or all of the product or you’s

data.

Indicates dangerous voltage (terminals

fed from the interior by voltage

exceeding 1000 volts must be so

marked).

Alternating current (power line).

Résumé des règles de sécurité

Si le matériel est utilisé d’une façon non conforme aux spécifications du constructeur, la protection assurée

par le matériel peut être mise en défaut.

Symboles de sécurité

Les symboles suivants sont utilisés dans tout le manuel et peuvent être trouvés sur le matériel. Il est

recommandé de se familiariser avec chaque symbole et sa signification avant de manipuler le matériel.

Symbole « manuel d’instruction ». Ce

symbole apparaît sur le produit

lorsqu’il est nécessaire de se référer

au manuel d’instruction pour éviter

une détérioration du matériel.

Masse. Ce symbole identifie une

connexion au châssis du matériel

(ce châssis inclut normalement

toutes les structures métalliques

exposées).

Terre : ce symbole identifie la

connexion de terre chargée de

protéger le matériel contre les chocs

électriques. Cette connexion doit être

raccordée vers un conducteur externe

de protection ou vers une électrode de

type terre.

Ce symbole désigne une opération

ou une condition dite « sensible »,

qui, si elle n’est pas correctement

réalisée, pourrait entraîner de

sérieuses détériorations au

matériel ou aux données

utilisateur.

Ce symbole indique un voltage

dangereux (connexion alimentée en

interne par un voltage excédant 1000

volts).

Courant alternatif (ligne de

puissance).

Spirent Communications, Inc.

541 Industrial Way West

Eatontown, NJ 07724

Phone: (732) 544-8700

Fax: (732) 544-8347

This manual applies to the SR5500, Version 2.30 and higher

Page Part Number: 2700-8351 Version A7

Printed in the USA.

Technical Support is available 8:30 AM – 5:30 PM EST, Monday - Friday

Phone support is available through Spirent Customer Care at +1 732-544-8700

Email support is available at [email protected].

Information furnished by Spirent Communications is believed to be accurate and reliable. However, no responsibility is assumed by Spirent

Communications for its use. Specifications are subject to change without notice.

Table of Contents

1. Introduction ..................................................................................... 1

1.1. Overview ...........................................................................................1

1.2. SR5500 Applications..........................................................................2

1.2.1. Applicable to All Design Phases ............................................................... 3

1.2.2. Evaluating Radio Access Technologies ..................................................... 4

1.2.3. Evaluating Air Interface Performance ....................................................... 5

1.3. Key Product Features .........................................................................5

1.3.1. Wireless Channel Emulation Features....................................................... 5

1.3.2. Ease of Use Features................................................................................6

1.4. SR5500 Guided Tour ..........................................................................6

1.4.1. Front Panel Description............................................................................6

1.4.2. Rear Panel Description............................................................................. 8

1.5. Quick Start Procedure ........................................................................ 9

1.6. Verification Procedure......................................................................11

1.7. Quick Start Using Test Assistant ....................................................... 12

1.8. Version History ................................................................................ 15

2. Operation Reference.......................................................................19

2.1. Overview .........................................................................................19

2.2. Operational Overview....................................................................... 19

2.2.1. Connecting to the SR5500......................................................................20

2.2.2. Basic Operation..................................................................................... 21

2.3. Using the Test Assistant...................................................................25

2.3.1. Accessing the Test Assistant .................................................................. 25

2.3.2. Changing the Carrier Frequency............................................................. 26

2.3.3. Automatically Selecting a Channel Profile .............................................. 26

2.3.4. Completing the Configuration ................................................................ 27

2.4. Channel Player................................................................................. 27

2.5. File Operations ................................................................................ 28

2.5.1. Settings Saved in the Settings File ......................................................... 29

ii | SR5500 Operations Manual

2.5.2. Recent File List....................................................................................... 29

2.6. Operational Detail............................................................................29

2.6.1. Channel I/O Parameters......................................................................... 29

2.6.2. Path Parameters.................................................................................... 38

2.6.3. Interference........................................................................................... 43

2.6.4. Instrument Setup View........................................................................... 45

2.7. Dynamic Environment Emulation ......................................................46

2.7.1. Method.................................................................................................. 47

2.7.2. Emulation File Creation (DEE Template) .................................................. 48

2.7.3. Dynamic Environment Emulation (DEE) View .......................................... 52

2.7.4. Using DEE with Multiple SR5500s........................................................... 54

2.8. Power Meter Parameters ..................................................................54

2.9. Using the SR5500 with 6 GHz/6GHz-EX Option .................................55

2.9.1. Configuring TestKit for the 6 GHz(-EX) Option ......................................... 56

2.9.2. Selecting Lower/Middle/Upper Band ..................................................... 56

2.9.3. Parameter Dependencies....................................................................... 56

2.10. Downloading Firmware to the SR5500 ..............................................57

2.10.1. Starting the Download ............................................................................57

2.10.2.During the Download............................................................................. 58

2.10.3.Recovery in Case of Failure..................................................................... 58

2.11. Changing the Remote Connection.....................................................58

2.11.1. Changing the SR5500 IP Address Configuration ..................................... 59

2.11.2. Changing the IP Address in SR5500 TestKit ............................................60

2.12. Updating the SR5500 Options ..........................................................60

2.13. Controlling Multiple SR5500s...........................................................61

2.13.1. Connecting Synchronization Cables ....................................................... 61

2.13.2. Configuring TestKit to Control Multiple Units .......................................... 62

2.13.3. Switching Between Units........................................................................ 63

2.13.4. Player Functionality. .............................................................................. 63

2.13.5. Correlation Coefficient Type. .................................................................. 63

2.13.6.System-Based Correlation. .................................................................... 64

2.14. Summary View.................................................................................65

2.14.1. Path Parameters....................................................................................66

2.14.2. System Parameters................................................................................66

Table of Contents | iii

3. Technical Reference .......................................................................67

3.1. Overview .........................................................................................67

3.2. Radio Channel Power Delay Profile ................................................... 68

3.3. Static Relative Path Delay.................................................................69

3.4. Time-Varying Relative Path Delay......................................................69

3.4.1. Sliding Relative Path Delay .................................................................... 70

3.4.2. Birth-Death Time-varying Relative Path Delay..........................................71

3.5. Relative Path Loss............................................................................ 72

3.6. Fast Fading ......................................................................................72

3.6.1. Rayleigh Fading Amplitude Distribution ................................................. 73

3.6.2. Rician Fading Amplitude Distribution ..................................................... 76

3.6.3. Fast Fading Power Spectrum Shapes...................................................... 78

3.7. Static Amplitude Channel Effects ...................................................... 78

3.7.1. Frequency Shift (Static Doppler)............................................................. 79

3.7.2. Static Phase Shift................................................................................... 79

3.8. Slow Shadow Fading........................................................................ 79

3.9. Additive White Gaussian Noise (AWGN) interferer..............................81

3.10. Power Meter ....................................................................................86

4. Instrument API ...............................................................................89

4.1. Overview .........................................................................................89

4.2. Benefits and Features ......................................................................90

4.3. Development Environments..............................................................90

4.4. API Usage Example ..........................................................................90

4.5. API Front Panel.................................................................................91

4.5.1. The API Front Panel Window Components............................................... 92

4.6. Further Information .......................................................................... 96

5. Remote Programming Interface Operation...................................... 97

5.1. Overview .........................................................................................97

5.2. Remote Control Features .................................................................. 97

5.3. Configuring SR5500 TestKit for Remote Control................................. 97

5.3.1. Setting up the Remote Programming Interface .......................................98

5.3.2. Start/Stop the Listener........................................................................... 99

iv | SR5500 Operations Manual

5.3.3. Local/Remote Mode............................................................................... 99

5.3.4. Enable Monitor Messages.................................................................... 100

5.3.5. Enable TCP/IP Echo.............................................................................. 100

5.3.6. Automatically Configuring SR5500 TestKit for Remote Control .............. 100

5.4. SR5500 TestKit Command Protocol.................................................100

5.4.1. Command Types .................................................................................. 100

5.4.2. Command Sequence.............................................................................101

5.4.3. Program Messages...............................................................................101

5.4.4. Response Format ................................................................................. 102

5.4.5. Long Form and Short Form of Mnemonics............................................. 102

5.4.6. Hierarchical Default Format.................................................................. 103

5.4.7. Error Message Format.......................................................................... 103

5.5. Transmission Layer Protocols ......................................................... 104

5.5.1. LAN CR/LF Protocol .............................................................................. 104

5.5.2. GPIB Protocol .......................................................................................105

6. RPI Command Reference...............................................................111

6.1. Conventions to Specify Commands.................................................111

6.2. Command Summary....................................................................... 112

6.3. Command Descriptions .................................................................. 115

6.4. Command Dependencies................................................................ 132

6.5. Autosets........................................................................................ 133

6.6. Overload Status.............................................................................133

6.7. Dynamic Environment Emulation (DEE)............................................ 134

7. Technical Specifications...............................................................136

7.1. Overview .......................................................................................136

7.2. RF Channel Specifications (without the SR5500 6 GHz Option).........136

7.3. RF Channel Specifications (with the SR5500 6 GHz Option)..............137

7.4. RF Channel Specifications (with the SR5500 6 GHz-EX Option).........139

7.5. Channel Emulation Characteristics .................................................140

7.6. Interference Generation Characteristics .......................................... 143

7.7. Power Measurement Characteristics............................................... 145

7.8. Interface and Environmental Characteristics ................................... 145

1. Introduction

1.1. Overview

The Spirent SR5500 Wireless Channel Emulator accurately emulates complex wideband

wireless channel characteristics such as time-varying multi-path delay spread, fading,

and channel loss. By providing a programmable and repeatable set of emulated radio

channel conditions, the SR5500 enables a thorough, structured approach to receiver

performance characterization. The SR5500, shown in Figure 1-1, replicates real-world

deployment conditions using powerful digital signal processing techniques, making it

possible to isolate performance issues early in the development and design verification

cycle. Optional AWGN enhances the real-world conditions emulated by the SR5500. Early

optimization of performance accelerates time to market and minimizes post-deployment

issues.

Figure 1-1: SR5500 Wireless Channel Emulator

Complete analysis of the performance of today’s complex radio transmission schemes

requires a channel simulator that offers rich emulation of radio channel characteristics.

This is required to ensure that lab and field performance measurements align. At the

same time, the instrument implementation must contribute minimal unwanted parasitic

simulation effects that can distort test results. The SR5500 high performance, all-digital

signal processing engine presents a realistic set of radio channel conditions to the most

complex radio transmission technologies. The use of the SR5500 DEE (Dynamic

Environment Emulation) further replicates real-world fading scenarios by allowing

dynamic control over fading parameters. With a high fidelity channel and long simulation

repetition rates, the SR5500 ensures reliable and accurate performance evaluation.

2 | SR5500 Operations Manual

The SR5500 Graphical User Interface (GUI) shown in Figure 1-2, enables you to select

channel models from a vast library of pre-defined industry standard channel models or

custom configurations that provide extreme precision using the Channel Model Editor.

Once the channel model is configured, the Channel Model Player enables low-level

control over playback including the ability to play, pause, and stop the simulation. If

changes to the channel model are required, the SR5500 real-time fading sequence

generation enables modifications to take effect instantly. This eliminates the need to

tolerate the testing delays associated with fading simulators that must pre-calculate

fading sequences.

Figure 1-2: SR5500 Wireless Channel Emulator Graphical User Interface

With the standard instrument configuration equipped with 24 independent multi-paths,

the SR5500 delivers performance evaluation beyond the minimum performance

requirements associated with 3G technologies, such as CDMA2000 and WCDMA, and

with evolving Wireless LAN standards. The SR5500 enables you to program time-varying

channel conditions, which is a critical capability required to properly assess the overall

performance of high-speed transmission technologies such as 1xEV-DO, 1xEV-DV, and

WCDMA HSDPA that employ adaptive modulation and coding schemes.

1.2. SR5500 Applications

The SR5500 emulates a wide array of radio channel conditions ranging from indoor

micro cellular environments with low mobility to macro-cellular environments with high-

speed mobility. With a channel modeling engine capable of an assortment of

configurations, the SR5500 can analyze the performance of current and emerging air

interface technologies such as EDGE/GSM/GPRS, CDMA2000, WCDMA, 802.16, and

802.11a/b/g in representative deployment conditions without leaving the test lab. To

facilitate testing that requires co-channel interference, the SR5500 optionally includes

the ability to generate AWGN. The SR5500 can be utilized in both Handset and Base

Station test applications as shown in Figure 1-3 and Figure 1-4. These capabilities make

it possible for the SR5500 to play a valuable role in all phases of the product realization

cycle.

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