8100 Mobile Device Test System. LTE RF Performance User Manual

Transcription

1 8100 Mobile Device Test System LTE RF Performance User Manual

2 Spirent 541 Industrial Way West Eatontown, NJ USA Web: AMERICAS SPIRENT EUROPE AND THE MIDDLE EAST +44 (0) ASIA AND THE PACIFIC This manual applies to LTE RF Module Version 1.6 or higher. Page Part Number: , Version A3 Copyright 2012 Spirent. All Rights Reserved. All of the company names and/or brand names and/or product names referred to in this document, in particular, the name Spirent and its logo device, are either registered trademarks or trademarks of Spirent plc and its subsidiaries, pending registration in accordance with relevant national laws. All other registered trademarks or trademarks are the property of their respective owners. The information contained in this document is subject to change without notice and does not represent a commitment on the part of Spirent. The information in this document is believed to be accurate and reliable; however, Spirent assumes no responsibility or liability for any errors or inaccuracies that may appear in the document.

3 Table of Contents 1. Introduction Overview Intended Audience Before You Get Started Security Information Accessing Documentation Accessing Documentation from Windows Explorer Accessing Documentation from Test Manager LTE RF Performance Test Descriptions Overview Description Using the LTE RF Performance Test Packs Overview Configuring the Platform Parameters Supported Platforms Platform Selection Specifying a Platform File Editing Platform Parameters Configuring Module UE and Session Parameters Locating the Test Suites and Test Cases Locating Pre-defined Module Test Suites Locating Module Test Cases System Calibration Calibration Procedure # Calibration Procedure # Running a Pre-Defined Test Suite Creating a Custom Test Suite Configuring Test Case Parameters Running a Custom Test Suite Setting Up a New UE File Test Time Optomization... 22

4 ii 8100: LTE RF Performance User Manual Configuring ESGS and Dowloading Modulated Wave Forms Overview Setting Up the LAN Interface Configuration for the ESG Downloading Waveform Files to the ESG External Filters for Verizon Supplimentary Emissions Tests SVLTE (Simultaneous Voice and LTE) Testing... 27

5 1. Introduction 1.1. Overview This document provides information on the LTE RF Performance Test Packs. You will become familiar with the Test Pack Suites, Test Cases, and setting up LTE RF testing scenarios in the Test Manager environment by following the step-by-step procedures and Test Reference documentation Intended Audience This manual is intended for those who have a working knowledge of wireless communication equipment, and are familiar with the automated testing of mobile devices. It is assumed that the audience is familiar with the Test Manager GUI environment. Those who are unfamiliar with the Test Manager should refer to the Test Manager User Manual before proceeding further Before You Get Started Before getting started with this guide, install all software and power up the test system. The controller PC is shipped with the Test Manager Test Executive software and LTE RF Performance Test Packs installed. Ensure that all instruments in the system are cabled in accordance with the Setup Guide shipped with the system Security Information The LTE RF Performance Test Packs are shipped with the appropriate dongle and software/hardware security passwords configured. To verify the security information: 1. Open Test Manager and select Help>About. The About Test Manager window displays, as shown in Figure 1-1.

6 2 8100: LTE RF Performance User Manual Figure 1-1: About Test Manager Window 2. Under the Passwords tab, in the Installed Features section, confirm the LTE RF Test Packs are installed, as shown in Figure 1-2. Depending on the test coverage purchased, there may be as many as three items listed for LTE RF (TP1, TP2, and TP3). Figure 1-2: About Test Manager Window Installed Features 3. Password authentication is required prior to running any tests supported by these Test Packs. This password is tied to security information provided by the USB hardlock dongle provided with the module installation. If you have any questions or concerns, contact Spirent Technical Support at support.spirent.com, or by phone at SPIRENT.

7 Chapter One: Introduction Accessing Documentation There are two ways to access this document from the Controller PC: 1. Windows Explorer 2. Test Manager Accessing Documentation from Windows Explorer Access this Manual offline by navigating to C:\Program Files\Spirent Communications\Test Manager\Modules\RF- LTE\User Manual.pdf using Windows Explorer, as shown in Figure 1-3. Figure 1-3: Accessing the Manual from Windows Explorer

8 4 8100: LTE RF Performance User Manual Accessing Documentation from Test Manager Access this Manual from the Test Manager menu by selecting: Help>Modules>RF - LTE>User Manual.pdf, as shown in Figure 1-4. Figure 1-4: Accessing the Manual from Test Manager

9 2. LTE RF Performance Test Descriptions 2.1. Overview This chapter provides a high-level overview of the key software and hardware components necessary to configure and use the LTE RF Performance Test Packs Description LTE RF Performance Test Packs evaluate the performance of a UE against specific LTE RF Conformance Tests (3GPP ) and custom RF performance tests. The test cases provided by LTE RF Performance are dictated by the RF Acceptance Test Plans of key carriers. LTE RF Performance is not a full RF Conformance Test Solution, but rather a carrier acceptance test solution covering a subset of the conformance tests. LTE RF Performance tests focus on the performance of the UE transmitter and receiver. Transmitter tests include spectral purity, power range, and EVM. Receiver tests include sensitivity level, input level range, and spurious response. Additional tests provided by LTE RF Performance include specific RF conditions encountered during the deployment of LTE. These conditions may relate to issues of deploying in the 700 MHz band; including known interference and spectral limitations due to adjacent signals.

10 3. Using the LTE RF Performance Test Packs 3.1. Overview This chapter gives information on using LTE RF Performance Test Packs from Test Manager. This includes the following steps: 1. Configuring the Platform Parameters 2. Configuring the UE and Session Parameters 3. Locating the Test Cases 4. Running a Pre-defined Test Suite 5. Creating a Custom Test Suite 6. Configuring Test Case parameters 7. Running a Custom Test Suite 3.2. Configuring the Platform Parameters Supported Platforms The LTE RF Test Packs support the following platforms: 8100-B Platform Selection As indicated in the Test Manager User Manual, you cannot run a suite successfully unless it undergoes validation using the specified Platform, Session and UE Parameter files. To specify the platform, use the Platform Selection dropdown field in the Execute Session window, as shown in Figure Specifying a Platform File In addition to the Platform Selection, you must specify a Platform File. Refer to the Test Manager User Manual for more information on creating a Platform File.

11 Chapter Three: Using the Test Packs 7 Figure 3-1: Execute Session Window Platform Selection for the LTE RF Module Editing Platform Parameters The 8100-B100 Platform file is shown in Figure 3-2. Under the 8100-B100 tab, ensure the IP Addresses match those set for the LTE Network Emulator and the SR8048. The SR8048 RF filter is optional. Set the SR8048 Filter Present field to indicate whether it is included system or not. Select the individual instrument tabs (ESG 1, ESG 2, and Spectrum Analyzer) and set the IP addresses to match each instrument. In the Calibration section, set the IP address of the ESG used for the Calibration Signal Source. We strongly recommend that you run a calibration before running LTE RF Performance tests. LTE RF supports Agilent Power Supply models: 66309B/D, 66311B/D, 66319B/D, and 66321B/D. Set the power supply being used to True and ensure the GPIB address on the instrument matches what is set in the Platform File, as shown in Figure 3-2. Configuring the power supply parameters is done in the UE file. Open the Calibration Wizard by clicking the Execute Calibration button. The wizard runs through a sequence of steps instructing you to make cable changes as the LTE RF software makes calibration measurements.

12 8 8100: LTE RF Performance User Manual Figure 3-2: 8100-B100 Platform File 3.3. Configuring Module UE and Session Parameters Use the Execute Session form to specify a Results folder, Session File, and the UE File, as shown in Figure 3-3. Figure 3-3: Execute Session Form

13 Chapter Three: Using the Test Packs Locating the Test Suites and Test Cases Locating Pre-defined Module Test Suites 1. In Test Manager, select the Suite Files tab in the File Cabinet and open the Suite Files folder tree. 2. All of the pre-defined Suites available for LT RF Performance Testing display, as shown in Figure 3-4. Figure 3-4: File Cabinet LTE RF Performance Module Pre-defined Suites

14 : LTE RF Performance User Manual Locating Module Test Cases 1. In the Test Manager, select the Modules tab in from the file Cabinet. 2. Open the Modules folder. 3. Open the LTE subfolder. This folder includes the LTE RF Transmitter and Receiver Tests, as shown in Figure 3-5. Figure 3-5: LTE RF Performance Module Test Cases

15 Chapter Three: Using the Test Packs System Calibration The LTE RF module features two types of calibration procedures to ensure level and test measurement accuracies Calibration Procedure #1 The first calibration procedure is accessible though the platform file. This procedure measures the insertion loss for all the various paths between the test equipment in the system and the UE. After clicking the Calibration Wizard button under the 8100-B100 tab, the Calibration Wizard window displays, as shown in Figure 3-6. Follow the instructions under the User Actions pane for each step. After executing the instructions, click the Next button. The calibration procedure runs through a sequence of steps until it has measured all of the necessary signal paths for a given platform. Figure 3-6: Calibration Wizard

16 : LTE RF Performance User Manual Calibration Procedure #2 In addition to the Insertion Loss Calibration Procedure, there is an Active Calibration and Diagnostic Procedure that can be performed at the beginning of each suite execution. This calibration routine uses a highly accurate power sensor to detect and calibrate out LTE downlink level inaccuracies. It also includes a real-time calibration of the LTE network emulator measurement functions. You can enable the Active Calibration Procedure under the LTE RF tab of the Session File, as shown in Figure 3-7. If this feature is enabled, you should enter the uplink and downlink frequencies used during testing under this tab as well. If test cases are run for unspecified frequencies, the LTE RF software interpolates between the two closest frequencies. For the most accurate test results, you should specify the center frequencies of the EARFNCs used during testing. This Calibration Procedure does not require any cable changes, however the Agilent Power USB Power Sensor must be connected to port P18 of the SR8048 at all times when Active Calibration is enabled.

17 Figure 3-7: Enabling Active Calibration Chapter Three: Using the Test Packs 13

18 : LTE RF Performance User Manual 3.6. Running a Pre-Defined Test Suite To run a pre-defined test suite: 1. In the Test Manager, open the desired test suite from the Suite Files tab of the File cabinet, as shown in Figure 3-8. Figure 3-8: Loading a Pre-defined LTE RF Performance Test Suite NOTE: Each Test Case in a pre-defined Suite has test case parameters configured to support the test definition. You do not have to alter them unless you are writing your own test suite. For more information on configuring test case parameters, refer to Section 3.8 on page In the Test Manager menu, select Execute>Start Session>Run All Test Cases to start executing the entire Test Suite. You also have the option of executing only the currently selected test case. The Execute Session window displays. 3. To run an LTE RF Performance Test Suite, ensure that you have the correct platform selected.

19 Chapter Three: Using the Test Packs If desired, specify the Tester Name, UE Manufacturer, and UE Model. These fields display on all reports you create based on the results of this session. NOTE: The Results folder and Platform File selections are already set, it is not necessary to make changes to these fields. 5. Click OK to begin validation. If successful, the test session begins, as shown in Figure 3-9. Figure 3-9: Test Session in Progress

20 : LTE RF Performance User Manual 3.7. Creating a Custom Test Suite To set up a custom LTE RF Performance test, you must create a Test Suite. To create a Test Suite: 1. In the Test Manager Menu, select File>New>Suite File, as shown in Figure Figure 3-10: Creating a New Suite 2. You can also use the toolbar shortcuts available to create a new file, as shown in Figure Figure 3-11: Creating a Suite File using the Toolbar Shortcut 3. A new Test Suite window opens with a default file name. This window allows you to sequence and arrange the tests.

21 Chapter Three: Using the Test Packs To add a test from the LTE RF Performance Module, Double Click on the desired test from the Module Files tab of the File Cabinet on the left add it to your Suite File on the right, as shown in Figure 3-12 and Figure Figure 3-12: Transferring a Test Case into a Suite Figure 3-13: Successfully Transferred Test Case 5. Configure the parameters for each Test Case based on your testing needs. Refer to Section 3.8 on page 18 for additional information on configuring Test Case Parameters. 6. When you have completed adding and sequencing the test cases, save the Suite file. The custom suite file displays in the file cabinet.

22 : LTE RF Performance User Manual 3.8. Configuring Test Case Parameters 1. In Test Manager, select the desired Test Suite from the Parameters tab in the File Cabinet. 2. In the Suite Editor, select the Test Case to configure, as shown in Figure Figure 3-14: Configuring Test Case Parameters 3. Select the appropriate defining parameters for the test. 4. Save changes to the Suite File Running a Custom Test Suite Once you have created the custom LTE RF Performance test suite and configured the test case parameters you can go ahead and run the test suite. As discussed in the Test Manager User Manual, the key requirements to run a userdefined suite are a valid Session, UE, and Platform file.

23 Chapter Three: Using the Test Packs 19 To run the custom test suite: 1. In the Test Manager menu, select Execute>Start Session>Run All to start executing the entire Test Suite. You have the option of executing only the currently selected test case. 2. You can also use the Toolbar shortcut to run the test, as shown in Figure The Execute Session window displays. Figure 3-15: Running a Test Case using the Toolbar Shortcut 3. To run a LTE RF Performance Test Suite, ensure the correct platform is selected. For more information on configuring Session and UE Parameter Files, refer to Section 3.2 on page If desired, specify the Tester Name, UE Manufacturer, and UE Model. These fields display on all reports created based on the results of this session. 5. Click OK to begin validation (if perform validation is checked, otherwise validation is skipped). If successful, the test session begins.

24 : LTE RF Performance User Manual Setting Up a New UE File To create a new UE file: 1. Select File>New>UE File. To edit an existing UE file, select File>Open>UE File. The UE file opens, as shown in Figure 3-16 Figure 3-16: Editing UE file 2. Under the Platform File tab, you can enter the UE Insertion Loss values, as shown in Figure a. These Loss Values specify the loss between the end of the Spirent system cables and the UE. Test Manager calibrates all signal paths and cables that ship with the system. b. You may need to use couplers to connect a UE antenna port to the N-Type Spirent cables. In addition, if you are using an isolation chamber, the loss values specified in this table should include the loss of the through connection into the isolation chamber.

25 Chapter Three: Using the Test Packs 21 Figure 3-17: LTE RF Parameters in the UE File 3. The RF-LTE tab allows you to configure the parameters to match the UE under Test. The available parameters are shown in Figure This tab is also where you can configure the optional UE power supply in conjunction with AT commands for UE automation. Turn off the power supply after the detach command and turn it on prior to the attach command. When turned on, the power supply is configured as specified by the parameters set on this tab. 4. The UE AT Interface tab, shown in Figure 3-18, contains parameters related to UE automation. a. UE automation allows you to control the UE over the data port during the execution of a test suite. b. You must edit the COM Port Settings to tell the Test Manager software how to communicate to the UE. These include parameters such as Port Number, Data Rate, and Parity. You must also specify the Command Strings for each AT command. Command strings for a given function vary depending on the UE manufacturer.

26 : LTE RF Performance User Manual Figure 3-18: UE AT Interface Parameters in the UE File Test Time Optomization The Session Form called The Enable Test Case Execution Time Reduction option is available from the Session Form shown in Figure When this parameter is enabled, the LTE RF software performs a single E201S configuration and UE attach, and then performs multiple test measurements. When enabled, the LTE RF software automatically scans the suite to determine where optimizations can be performed. The test time is greatly decreased in cases where a a given test case needs to be run for a variety of resource block allocations or modulation types. Because the first test case in an optimized block of test cases is responsible for the E2010s configuration and establishing the LTE connection with the UE, it will take the longest amount of time to run. After the first test case completes, subsequent test cases are executed quickly with only slight variations to Air Interface parameters. NOTE: For test time optimization work properly, Validation must be enabled when running the suite, as shown in Figure During the Validations step, the LTE RF software scans the suite for blocks of test cases that can be optimized. There are some feature limitations when running with optimization enabled. Skipping test cases during execution and re-running failed or incomplete test cases are not supported.

27 Figure 3-19: Session Form Execution Time Reduction Parameter Chapter Three: Using the Test Packs 23

28 : LTE RF Performance User Manual Figure 3-20: Enable Validation if Test Time Reduction Feature

29 Chapter Three: Using the Test Packs Configuring ESGS and Dowloading Modulated Wave Forms Overview Some receiver tests make use of ESGs to generate interference signals. The files are packaged and installed under the C:\Program Files\Spirent Communications\Test Manager\Modules\RF - LTE\Interference Waveform Files directory. You must upload these waveform files onto the ESG before conducting tests. NOTE: If the instructions below fail to work, we recommend that you follow the instructions given in the latest Agilent ESG Manual on uploading the waveform files onto the ESG Setting Up the LAN Interface Configuration for the ESG The ESG1 is the unit connected to P15 of the SR8048 TCU. To assign a hostname and IP address to the signal generator, follow the instructions given below. Note that the hostname and IP address are persistent states; they are not affected by an instrument preset or power cycle. NOTE: Ensure that the signal generator is connected to the LAN using a 10Base-T LAN cable Manual Configuration 1. Press Utility>GPIB/RS-232 LAN>LAN Setup. 2. Press Hostname. NOTE: The Hostname soft key is only available when LAN Config Manual DHCP is set to Manual. 3. Use the labeled text soft keys and/or the numeric keypad to enter the hostname. To erase the current hostname, press Editing Keys>Clear Text. 4. Press Enter. 5. Set the LAN Config Manual DHCP to Manual. 6. Press IP Address and enter: Use the left and right arrow keys to move the cursor. Use the up and down arrow keys, front panel knob, or numeric keypad to enter an IP address. To erase the current IP address, press the Clear Text soft key. 8. Press the Proceed with Reconfiguration soft key, and then press Confirm Change. The ESG1 instrument now reboots.

30 : LTE RF Performance User Manual 9. Repeat the above steps for the ESG2 instrument using for the IP address. ESG2 is the unit connected to P16 of the SR8048 TCU Downloading Waveform Files to the ESG After the ESG1 restarts, perform the following steps: 1. From the Controller PC, open the Command Prompt. 2. Type CD C:\Program Files\Spirent Communications\TestManager\Modules\RF - LTE\Interference Waveform Files. 3. When you are prompted to enter the username and password, keep the fields blank and press Enter. 4. Type bi on the FTP prompt and press the ENTER key. 5. Type ha on the FTP prompt and press the ENTER key. 6. Type put ATSC.bin \user\waveform\atsc.bin and press the ENTER key. 7. Repeat this step for every modulated interferer file that appears in the Interference Waveform files directory by typing put filename \user\waveform\filename and pressing the ENTER key. 8. Repeat the above steps for the ESG2 using for the IP address External Filters for Verizon Supplimentary Emissions Tests This section applies to the external filters for the Verizon Supplementary Band 13 and Band 4 Spurious Emissions test. For some very low limit Spurious Emissions test cases (-80 dbm/mhz), it is necessary to use external filters. The filters block the UE carrier signal; this allows the input attenuator of the spectrum analyzer to be set to zero. This is the only way the spectrum analyzer can make the measurements specified in these test cases. The only test suites this applies to are: VzW LTE Spurious Emissions with GPS Frequencies Band 13.STE VzW SVLTE Spurious Emissions with GPS Frequencies Band 13 BC0.STE VzW SVLTE Spurious Emissions with GPS Frequencies Band 13 BC1.STE VzW LTE Spurious Emissions with GPS Frequencies Band 4.STE There are two different filters: one for Band 4 and one for Band 13. To use this filter, disconnect the n-type cable from the input of the spectrum analyzer and connect the filter to the spectrum analyzer port.

31 Chapter Three: Using the Test Packs 27 Reconnect the cable to the other end of the filter. Run only the listed test cases with a filter attached. Remove the filter for all other testing. The LTE RF software has stored data pertaining to these filters and automatically accounts for the additional loss introduced by the filter SVLTE (Simultaneous Voice and LTE) Testing The LTE RF Module supports testing LTE RF performance in the presence of a 1xRTT voice call. The 1xRTT voice call is established using an Agilent 8960 with a CDMA2000 lab application installed. Doing this testing requires external RF hardware in order to combine the LTE and the 1xRTT signal to the UE antennas. Since this external hardware adds loss to the signal path it is important to change the platform file to include an 8960 then run the calibration procedure. After running calibration consult the LTE-B100 & C2K ATS SVLTE setup guide to cable the external hardware to match the antenna configuration of the device under test. Since the antenna configurations vary from UE to UE the cabling of this hardware will vary with the device under test. The supported antenna configurations are provided in the table below. Configuration Number UE Antenna 1 Ant 1 - Primary LTE TX/RX Ant 2 - Secondary LTE RX + 1X TX/RX 2 Ant 1 - Primary LTE TX/RX + 1X TX/RX Ant 2 - Secondary LTE RX 3 Ant 1 - Primary LTE TX/RX + 1X RX Ant 2 - Secondary LTE RX + 1X TX 4 Ant 1 - Primary LTE TX/RX Ant 2 - Secondary LTE DRX Ant 3 1X TX/RX After connecting the external hardware and indicated in the Setup Guide, be sure to specify the correct antenna configuration in the Platform File, as shown in Figure 3-21.

32 : LTE RF Performance User Manual Figure 3-21: Antenna Configuration Set the CDMA2000 parameters in the UE file. You must first enable SVLTE in order for the CDMA200 parameters to be configurable. Figure 3-22: SVLTE Setting Enabled Individual test cases allow you to specify CDMA200 Band Class and Channel Number. The purpose of the LVLTE test pack is to verify if a UE can pass LTE RF Performance requirements while maintaining a 1xRTT voice call. When LTE RF Performance tests are run with SVLTE enabled, a 1xRTT call is set up prior to performing the LTE RF measurements during the test sequence. The status of the 1xRTT call is monitored. If the call drops during the test or if the UE does not perform to the minimum requirements specified by the test, it will be reported as a failure.