Agilent Technologies E6651A User manual

Agilent Technologies
Mobile WiMAX Test Set
TM
Agilent E6651A
User’s Guide

Notices
© Agilent Technologies, Inc. 2007
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Edition
First Edition, July 2007
Agilent Technologies UK, Ltd
Station Road, South Queensferry
West Lothian EH30 9TG, UK
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Safety Notices
CAUTION
A CAUTION notice denotes a haz-
ard. It calls attention to an operat-
ing procedure, practice, or the like
that, if not correctly performed or
adhered to, could result in damage
to the product or loss of important
data. Do not proceed beyond a
CAUTION notice until the indicated
conditions are fully understood and
met.
WARNING
A WARNING notice denotes a
hazard. It calls attention to an
operating procedure, practice, or
the like that, if not correctly per-
formed or adhered to, could result
in personal injury or death. Do not
proceed beyond a WARNING
notice until the indicated condi-
tions are fully understood and met.
WiMAXis a certification mark of the
WiMAX Forum.
Windows®and MS Windows XP®are U.S.
registered trademarks of Microsoft Corpo-
ration.

E6651A User’s Guide 3
Contents
1 Introduction
Product Overview 8
Base Station Emulator (BSE) 8
Signal Analyzer (SA) 8
Signal Generator (SG) 8
Functions and Features 9
E6651A Features 9
General Specifications 11
Agilent Sales and Service Offices 13
2 Getting Started
Basic Configuration 16
Front Panel 16
Rear Panel 19
Measurement Screen Configuration 21
Setting Window 22
Menu Tree Configuration 24
Basic Operation 26
Turning the Power ON 26
Operational Mode Selection 27
Turning the Power OFF (Normal Termination) 28
Turning the Power OFF (Abnormal Termination) 29
3 Base Station Emulator Mode
Interfacing With the Subscriber Station 32
Uplink Padding Test 35
Downlink UDP Test 37
Downlink Ping Test 38
CINR Test 39
Ranging Test 41
PMC-RSP Test 42
Protocol Function Test 43
Power Control Test 45
Hand-over Test function 48
Setting Parameters 53

4E6651A User’s Guide
Setting General BSE configuration parameter 53
Setting Test Parameters 54
Terminating BSE Mode Operation 56
4 Signal Analyzer Mode
Measurement Preparation 58
SA Mode Setup Procedure 58
System Settings 58
Frequency Menu 61
Amplitude Menu 62
Measurement Menu 63
Modulation Analysis 64
Mobile WiMAX Modulation Accuracy Analysis Window 64
Spectrum Analysis 66
Spectrum Measurement Window 66
Marker Menu 69
Peak Menu 70
Flatness Analysis 71
5 Signal Generator Mode
Signal Generator Mode 74
SG Mode Setup Procedure 74
6 Remote Interface (API) Programming Command Reference
Creating a Test Program 76
Step 1 - Copy and Reference the Dynamic Link Library (DLL) 77
Step 2 - Install the IPX LAN protocol 77
Step 3 - Initialize the E6651A Interface 79
Step 4 - Configure the Measurement Parameters 81
Step 5 - Perform the Test 81
Step 6 - Get the Measurement Results 81
Step 7 - Close the Session 81
Command Reference 82
System information functions 84
General functions 85
Spectrum Mode 99
Flatness 116
BS Emulator Mode 124
BS Emulator Functions 136
BS Emulator Test Functions 139
UL Padding Test 141

E6651A User’s Guide 5
DL UDP Test 143
DL Ping Test 146
Power Control Test 150
Tools Functions 169
Functions used in V1.5 170
A Appendix A - Network Entry Procedure
Network Entry Procedure Overview 172
Network Entry Procedure Detail 174
Downlink Synchronization and Uplink Parameter Information 174
Initial Ranging Procedure Execution and Basic Capabilities
Negotiation 176
Registration Procedure 180
Periodic Ranging for Connection Maintenance 182
REP-REQ message Setting 183
Profile Selection 185
B Appendix B - Sample Usage Procedures
Turning the Power On 188
Starting the Program 188
Setting the Center Frequency 189
Setting the Attenuation 190
Setting the Amplitude 191
Enabling MOD and RF Modes 192
Starting and Stopping BSE Mode 193
Setting and Modifying the Modulation Scheme 194
Starting an Uplink or Downlink Test 195
Performing Modulation Analysis in SA Mode 196
Performing Spectrum Analysis in SA Mode 197
Attenuation Setting Recommendations 198
Abbreviations and Acronyms 199

6E6651A User’s Guide

7
Agilent E6651A Mobile WiMAX Test Set
E6651A User’s Guide
Agilent Technologies
1
Introduction
Product Overview 8
Functions and Features 9
General Specifications 11
Agilent Sales and Service Offices 13
This document describes the operation of the E6651A Test Set, a Mobile
WiMAX 802.16e Subscriber Station Tester. This product is used for
protocol verification and performance measurement of Mobile WiMAX
Subscriber Stations (SS). The E6651A Test Set was designed to be
operated as a standard Mobile WiMAX base station, and is also capable of
analyzing and generating Mobile WiMAX signals.

8E6651A User’s Guide
1Introduction
Product Overview
The E6651A Test Set is designed to test and analyze the
performance and signaling of Mobile WiMAX subscriber
stations based on the IEEE 802.16e standard. The Test Set
consists of three major operating modes:
Figure 1 The Agilent E6651A Mobile WiMAX Test Set
Base Station Emulator (BSE)
In Base Station Emulator (BSE) mode, the Test Set simulates
the operation of a Mobile WiMAX base station.
Signal Analyzer (SA)
In Signal Analyzer (SA) mode, the Test Set can be used to
analyze Mobile WiMAX uplink signals using modulation,
spectrum and flatness analysis. Modulation Analysis mode
displays the OFDM signal in both frequency and time
domain. The Spectrum Analysis functionality, implemented
using a Fast Fourier Transform (FFT) algorithm, displays the
measured WiMAX signal in the frequency domain. Flatness
Analysis enables comparison of power levels of the spectral
components.
Signal Generator (SG)
In Signal Generator (SG) mode, the Test Set generates
standard Mobile WiMAX uplink and downlink signals.

Introduction 1
E6651A User’s Guide 9
Functions and Features
E6651A Features
•IEEE 802.16e OFDMA Mobile WiMAX subscriber station
tester
•Real- time Mobile WiMAX downlink signal modulation
•Real- time Mobile WiMAX uplink demodulation
•Base station emulation with MAC, protocol stack
•TDD synchronization (auto- switching) of signal generator
and signal analyzer
•Ranging code detection
•Various preamble, FCH, DL- MAP, UL- MAP, burst
configuration settings
•DL PUSC, DL FUSC, UL PUSC
Mobile WiMAX radio
(PHY) measurements
•OFDM constellation and EVM (BPSK, QPSK, 16QAM,
64QAM)
•UL data EVM
•Error vector spectrum, error vector versus time
•CCDF (complimentary cumulative distribution function)
•Channel power, occupied bandwidth
Transmitter •Modulation and coding
•Ranging support
•Power level control
•Synchronization
•Maximum output signal
•Frequency accuracy
•Channel bandwidth measurement
•Spectral flatness
•Relative constellation error (EVM)

10 E6651A User’s Guide
1Introduction
Receiver •Maximum tolerable signal
•Maximum input signal
•Sensitivity
•Cyclic prefix
•Preambles
•Frame duration timing
•RSSI
•BER versus CINR
Mobile WiMAX
MAC test items
•Response time for MAC management request message
•Initial ranging procedure verification under exceptional
RF conditions
•Dynamic service flow status for given conditions
•SS MAC layer verification and performance test

Introduction 1
E6651A User’s Guide 11
General Specifications
Environmental
Physical Specifications
Power Requirements This equipment has an IEC 60320- 1 C14 inlet for connecting
a detachable mains cord set.
Table 1 Agilent E6651A Mobile WiMAX Test Set Power Requirements
Operating Temperature 0oC to +55oC
Storage Temperature: -20oC to +70oC
Humidity: 15% to 95% Relative Humidity at +40oC
Altitude: 3000m (9,840 ft.)
EMC: Meets EN55011: 1991 (Group 1, Class A), and
EN50082-1:1992.
Weight (Net): 25.8 Kg
Dimensions: 222 H x 444 W x 647 D mm nominal
CAUTION This instrument has an autoranging line voltage input, ensure the
supply voltage is within the specified range.
Line Power: Input Voltage Range: 100 to 240 Vac,
automatic selection
Input Frequency Range: 50 to 60 Hz
Power Requirement: 150 VA (max)
WARNING This is a Safety Class 1 Product (provided with a protective
earthing ground, incorporated in the power cord). The mains plug
shall only be inserted in a socket outlet provided with a protective
earth contact. Any interruption of the protective conductor inside
or outside of the instrument is likely to make the instrument
dangerous. Intentional interruption is prohibited.

12 E6651A User’s Guide
1Introduction
CAUTION Ventilation Requirements: When installing the instrument in a
cabinet, the convection into and out of the instrument must not be
restricted. The ambient temperature (outside the cabinet) must be
lest than the maximum operating temperature of the instrument by
4×C for every 100 Watts dissipated in the cabinet. If the total power
dissipated in the cabinet is greater then 800 Watts, then forced
convection must be used.

Introduction 1
E6651A User’s Guide 13
Agilent Sales and Service Offices
In any correspondence or telephone conversations, refer to
the Test Set by its model number and full serial number.
With this information, the Agilent representative can quickly
determine whether your unit is still within its warranty
period.
You can visit our website: -
http://www.agilent.com/find/assist.
UNITED STATES Agilent Technologies
(tel) 1 800 829 4444
CANADA Agilent Technologies Canada Inc.
Te s t & M e a s u r e m e n t
(tel) 1 877 894 4414
EUROPE Agilent Technologies
Te s t & M e a s u r e m e n t
European Marketing Organization
(tel) (31 20) 547 2000
JAPAN Agilent Technologies Japan Ltd.
(tel) (81) 426 56 7832
(fax) (81) 426 56 7840
LATIN AMERICA Agilent Technologies
Latin America Region Headquarters, USA
(tel) [phone]
(fax) [phone]
AUSTRALIA and
NEW ZEALAND
Agilent Technologies Australia Pty Ltd.
(tel) 1-800 629 4852 (Australia)
(fax) (61 3) 9272 0749 (Australia)
(tel) 0-800 738 378 (New Zealand)
(fax) (64 4) 802 6881 (New Zealand)
ASIA PACIFIC Agilent Technologies, Hong Kong
(tel) (852) 3197 7777
(fax) (852) 2506 9284

14 E6651A User’s Guide
1Introduction

15
Agilent E6651A Mobile WiMAX Test Set
E6651A User’s Guide
Agilent Technologies
2
Getting Started
Basic Configuration 16
Measurement Screen Configuration 21
Menu Tree Configuration 24
Basic Operation 26
This chapter describes the primary hardware and software interfaces used
in the operation of the E6651A Test Set, as well as basic operating
procedures for the system.

16 E6651A User’s Guide
2Getting Started
Basic Configuration
Front Panel
To begin using the E6651A Test Set, you should become
familiar with the layout of the Front Panel and the displayed
menu systems. The items described in this section are the
Front and Rear Panel of the Test Set, the Measurement
Screen, the Setting Window, and the Menu Tree
configuration.
Figure 2 Front Panel Configuration
Power This is the On/Off button for AC power. Pressing this button
when the Test Set is powered off turns it on. Pressing this
button after the OS has completed booting turns the power
off.
The Power button does not power the Test Set off while the
Graphical User Interface (GUI) is running. To power off from
this state, press the No button on the Front Panel to close
the GUI, followed by the Power button. If pressing the Power
Power
Menu
Return
More
Arrow
RF I/O
USB
Keys
Knob
Measure
Amplitude
Mode
Frequency
Hex Keys Preset
System
Local
Pause
Bk Sp
Enter
No
Yes
Numeric Keys
RF
MOD

Getting Started 2
E6651A User’s Guide 17
button does not turn the power off, hold the button down
for 5 seconds to bypass the operating system termination,
and power off.
LCD Screen Measurement results are displayed on the LCD Screen.
Different screen layouts are used for each mode of operation.
In each layout, the screen is divided into three areas: the
Setting Window, the Working Window, and the Selection
Menu.
Menu Press the Menu button to display the top level menu for the
current Measurement Window.
Return Press the Return button to display the previous menu for the
current Measurement Window.
More Use this button to select additional options when more than
6 menu options are available.
Knob Increments and decrements the value of the currently
selected parameter.
USB Port The Test Set software runs on an embedded operating
system. Devices using a USB interface may be connected to
this port.
Arrow Key Move the on- screen cursor using the Left and Right Arrow
Keys.
Numeric and Hex
Keys
Parameters like frequency can be input using these keys.
Hexadecimal values can be input using the Hexadecimal
Keys.
RF I/O An antenna or cable is connected to this port for
communication with the subscriber station. This port can act
as an RF input port, an RF output port or a duplex port
based on the mode of operation. In BSE mode, this port
automatically switches between input and output based on
the downlink and uplink frame duration. In SA mode, this
port may operate as an RF input or duplex port.
Menu Selection
Keys
Six buttons are available on the right hand side of the LCD
Screen for menu selection. The current menu is displayed at
the right side of the screen. When more than 6 menu
options are available, select More to see the additional
options.
Amplitude Adjust values related to input power using this button,
including Amplitude, Attenuation, Reference Level, Scale and
Amplitude Offset.

18 E6651A User’s Guide
2Getting Started
Frequency Use this button to set frequency- related values including
Center Frequency, Frequency Offset, Resolution Bandwidth
(RBW), Channel Bandwidth (CBW) and SPAN. The Center
Frequency is used as the starting point for frequency
parameter adjustment.
Mode Use this button to select the BSE (Base Station Emulator),
SA (Signal Analyzer) or SG (Signal Generator) mode of
operation.
Measure Use this button to display the Measurement Menu in SA
mode. When the unit is in BSE or SG mode, pressing this
button switches the mode to SA. SA measurement selections
available in this mode include Spectrum Analysis, WiMAX
Modulation Analysis, I/Q input Analysis, Error Vector
Spectrum Analysis, and CCDF.
System This button displays the Mode Setup Menu including options
for Input Source Selection, Reference Clock Selection, Trigger
On/Off Selection, I/Q Output Level Adjustment, Connect
E6655A On/Off Selection, Machine ID Adjustment, UL
Permbase Adjustment and I/Q Reverse On/Off Selection.
Preset Use this button to revert most parameters to their default
values and some are unaffected.
Pause Use the Pause button to stop Test Set operation in BSE or
SA mode. When Pause status is active, PAU in Setting
Window is lit in red.
Local Use this to return the Test Set to front panel control after
remote interface operation.
Bk Sp Press the Bk Sp (back space) key to delete the selected digit.
ENT Press the Enter key to apply inputs and terminate input
selection.
Yes This button is used to confirm the action or choice
presented in the Yes/No window
No Press this button to terminate the Test Set GUI.
RF Press this button to generate an RF modulation signal. Both
the RF and MOD functions must be enabled to generate a
WiMAX output signal.
MOD Press this button to generate a modulation signal. Both the
RF and MOD functions must be enabled to generate a WiMAX
output signal.

Getting Started 2
E6651A User’s Guide 19
Rear Panel
Figure 3 The E6651A Test Set Rear Panel
Power Switch This switch must be ‘ON’ to enable switching the Test Set on
and off using the Front Panel On/Off switch.
Power Connector: Connect the AC power cable here.
Reference clock
Port
Use the 10 MHz Clock Port to synchronize all system clocks
of the Test Set with the Device Under Test (DUT). Use the
Output Port if you want to supply the DUT with the Test
Set's clock. Use the Input Port if you want to provide the
DUT's clock to the Test Set.
Trigger Ports Use the Trigger Port to synchronize the WiMAX TDD frame
of the Test Set with the DUT. Use the Output Port if you
want to apply the synchronization signal from the Test Set
to the DUT. Use the Input Port if you want to apply the
signal from the DUT to the Test Set. Trigger #2 ports are
used to provide downlink and uplink transition information.

20 E6651A User’s Guide
2Getting Started
IF input Ports The Test Set gets IF input signal from external RF device
using IF input ports. This port is not used in current
product version.
LAN Port This port is used to interface with an external internet
network or controller. When both are required
simultaneously, an Ethernet hub may be connected here. A
hub is required when connecting to the Agilent E6655A
WiMAX Lab Application.
VGA Port Standard VGA output port.
USB Port Devices using a USB interface such as a keyboard or mouse
may be connected to this port.