PXI LTE/LTE-A Downlink (FDD and TDD) Measurement Suite Data Sheet

Transcription

1 PXI LTE/LTE-A Downlink (FDD and TDD) Measurement Suite Data Sheet The most important thing we build is trust Designed for the production test of the base station RF, tailored for the evolving small cell test requirement Industry leading measurement speed and 3GPP specification exceeded measurement accuracy. Ready to support the BS RF non-signaling measurement during the R&D design stage. A good choice for the 7X24 regression test, advanced radio signal simulation and analysis application LTE-A Carrier Aggregation Global TDD and FDD LTE bands Production test focused transmitter and receiver RF characteristics measurement Output Power CCDF Occupied Bandwidth Adjacent Channel Leakage Ratio Operating Band Unwanted Emissions Frequency Error EVM Reference sensitivity level In-channel selectivity The LTE/LTE-A downlink measurement suite is a collection of software tools for use with the PXI 3000 Series RF modular instruments for measuring the LTE FDD and TDD transmitter and receiver characteristics of the base station including small cell, in accordance with the methods described in 3GPP TS V

2 The measurement suite combined with the excellent RF performance of PXI VSA and VSG modules, is suitable for the base station RF components test during design validation and production test stages. PXI Studio 2 provides a user interface for bench-top manual operation during design integration or trouble shooting with multiple views of graphical traces. Analysis component libraries provide low level remote programming interfaces for highly customized ATE system integration. IQCreator waveform generation tool (supplied separately) enables the generation of bespoke test waveforms for use in measuring the receiver characteristics of the RF components. PXI Maestro is a unique automated production test tool which optimizes test speed through parallel and multi-thread measurement techniques. Integrated test plan editor and debug tools speed through the interface between R&D and production test and reduce the time for new product introduction. PXI Maestro based solutions are available for customers who require a Turnkey production ATE solution. Figure1. LTE Downlink Measurement Suite Software Component Architecture IQCreator and PXI Studio 2 application software are supplied free of charge with PXI 3000 modules. Operation of the measurement suite or IQCreator requires simple activation of a license key option on the PXI 3000 hardware. Further information for these applications is available through the following links: IQCreator PXI Studio 2 PXI Maestro

3 SPECIFICATIONS All specifications are defined when used in conjunction with any 3030 Series or 3070A PXI RF Digitizer with option 117 LTE Downlink operating in all 3GPP specified global FDD and TDD LTE bands. Tx measurements performed are in accordance with 3GPP V Chapter 6. Flexible options of stimulus are available for the receiver characteristics measurement in accordance with 3GPP V Chapter 7. Specifications are defined with the input signal at the RF digitizer tuned frequency and at the reference level unless otherwise stated. TX MEASUREMENT CONFIGURATION RF Frequency User defined frequency (Hz), subject to the supported RF input of frequency range of the PXI RF digitizer Band Valid value: FDD: 1-25 (excluding band 5, 16) TDD: 33 to 43 Channel Valid value: Subject to selected band and bandwidth Attenuation Mode Auto, Manual. Auto: All Digitizer hardware setting are set automatically based on the specified DUT output level and TX path loss Manual: User control is provided for RF attenuation and preamplifier settings. System Bandwidth Downlink Mode 1.4, 3, 5, 10, 15 and 20 MHz Up to 2x20 MHz Intra band Carrier aggregation FDD, TDD Test Model E-TM 1.1, E-TM 1.2, E-TM 2, E-TM 3.1, E-TM 3.2, E-TM 3.3, Manual Configuration The Tx signal cell ID physical channel parameters and analysis options are manually configurable, in order to demodulate and analyze the non-standard 3GPP test model (1) Tx signals. Footnote (1) The Tx signal with 7.5 khz sub-carrier spacing, multi-cast operation (PMCH, MBSFN reference symbols) and UEspecific/MBSFN reference symbols are not supported in the current release. Measurements Search Length Sync Type User Carrier Filter Pilot Tracking (Amplitude/Time/Phase) Manual configurable Primary Sync signal, Cell-specific reference signal Disabled, Enabled Enabled, Disabled Triggering Triggering Type Immediate, External, Burst Trigger source, delay and polarity can be configured manually when the external triggering type is selected. Trigger level, delay and polarity can be configured manually when the burst triggering type is selected.

4 ACLR Configuration ACLR Configuration Mode ACLR Limit Mode Auto, User defined Wide (Category A), Wide (Category B1), Wide (Category B2), Local, Home Operating Band Unwanted Emissions Mask Operating Band Unwanted Emissions Mask Aggregated Maximum Power (Home BS) Wide (Category A), Wide (Category B1), Wide (Category B2), Local, Home, User defined dbm, Manual TX MEASUREMENTS POWER Indication Trace Accuracy Average Tx output power dbm Spectrum Captured power vs. Time Power vs. Symbol Power vs. Slot Power vs. Resource block With input to RF digitizer at the reference level and ambient temperature 23 C ±5 C) With 3035C Specified Typical >500 MHz and 3 GHz <±0.7 db ±0.3 db >3 GHz and 6 GHz <±1.0 db With 3070A Specified Typical 3 GHz <±0.8 db ±0.3 db >3 GHz and 6 GHz <±0.9 db ±0.5 db CCDF (COMPLEMENTARY CUMULATIVE DISTRIBUTION Trace Peak to average power (db) vs. probability (%) OCCUPIED BANDWIDTH Indication Hz FREQUENCY ERROR Indication Locked Range Hz ±7.5 khz Accuracy <±1 Hz ( Reference frequency error excluded

5 EVM Indication % Traces EVM (RMS) vs. Symbol EVM (RMS) vs. Slot EVM vs. Subcarrier EVM vs. Resource Block Constellation Text Measurement Results EVM (RMS, Peak) vs. Channel: Pilot, PBCH, PCFICH, PHICH, PDCCH, PDSCH (General, QPSK, 16QAM, 64QAM), PSCH, SSCH EVM Live, Average, Min Hold, Max Hold, Std. Dev statistics result is available. Accuracy <±1% (20 MHz bandwidth, EVM range 0-8%) Typical EVM Measurement Accuracy With 3035C ±0.5% With 3070A ±0.5% Figure 5. Measured residual EVM when PXI VSG 3050A/3320 is used as input to 3070A VSA with the input level of 0 dbm, E-TM 3.1, 20 MHz bandwidth

6 ADJACENT CHANNEL LEAKAGE RATIO (ACLR) Measurement Results ACLR Pass/Fail ACLR absolute power (dbm), relative power (dbc) and limits (dbc) at each specified BS adjacent channel centre frequency offset below the lowest or above the highest carrier centre frequency transmitted. Measurement Accuracy In any 3GPP frequency band <3 GHz: Relative measurements <± 0.05 db / 10 dbc Figure 6. Measured ACLR (E-TM 1.1, 10 MHz, RF input 0 dbm) OPERATING BAND UNWANTED EMISSIONS Measurement Results Operating band unwanted emissions measurement overall Pass/Fail Operating band unwanted emissions measurement fail frequency (Hz) Operating band unwanted emissions fail level (db) Trace Operating band unwanted emission measurement and limits Figure 7. Operating band unwanted emission measurement and limits OTHER TRACE MEASUREMENTS Symbol Clock Error vs. Symbol Symbol Clock Error vs. Slot Magnitude Error RMS vs. Symbol Magnitude Error RMS vs. Slot Magnitude Error vs. Subcarrier Magnitude Error vs. Resource Block Phase Error RMS vs. Symbol Phase Error RMS vs. Slot Phase Error vs. Subcarrier Phase Error vs. Resource Block

7 RX MEASUREMENT PXI Studio 2 is used with a full range of predefined 3GPP compliant waveforms to control the PXI VSG and perform receiver sensitivity testing per 3GPP TS clause 7.2 Additional waveforms for other 3GPP section 7 test cases can be generated using IQCreator. See application note 46900/838 "Performing LTE Base Station Receiver Measurements" on our website. Use of IQCreator requires option 100 is enabled on the 3020 Series or 3320 signal generator module. Figure 9. IQCreator waveform generation tool screenshot PXI Studio 2 provides the simple GUI for controlling multiple VSG modules, and facilities the 3GPP defined receiver measurement scenarios requiring a second RF signal generator source, e.g. In-channel selectivity.

8 Figure 10. Multi-Source plug-in of PXI Studio2 Further RF signal generating capability related information is available through the following links: 3020 Series PXI Digital RF Signal Generators data sheet 3050A/3320 PXI Low Noise Signal Generator data sheet

9 GENERAL Operating System Required Memory Win7/32 bit and Win7/64 bit 512 Mbytes minimum, 1024 Mbytes recommended Display Resolution Minimum 1024 x 768 Hardware Compatibility Software Compatibility 3030 Series or 3070A RF Signal Digitizer (VSA) 3020 Series or 3050A/3320 RF Signal Generator (VSG) PXI 3000 Series modules require NI VISA: Minimum version 4.6 or later LTE Downlink (3030 option 117) requires PXI Studio2 minimum version 2.4 LTE Downlink (3070 option 117) requires PXI Studio2 minimum version 2.4 and PXI module driver minimum version Use with PXI 3066 RF combiner module requires PXI module driver minimum version ORDERING LTE Downlink (FDD and TDD) Measurement Suite When purchased with a 3030 Series RF Signal Digitizer module, order as: 3030 option 117 When purchased with a 3070A RF Signal Digitizer module, order as: 3070 option 117 PXI Maestro Ordering Information 3030 option 217 (requires option 117) 3070 option 217 (requires option 117) Retrofit Options RTROPT117/3030 RTROPT117/3070 RTROPT217/3030 (requires option 117) RTROPT217/3070 (requires option 117)

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12 Cobham Wireless - Validation Part No.46900/032, Issue 2, 07/15