PXI UMTS DL Measurement Suite Data Sheet

Transcription

1 PXI UMTS DL Measurement Suite Data Sheet The most important thing we build is trust Transceiver measurements of transmit power, modulation signal quality, spectral emissions and receive sensitivity using methods as defined in 3GPP TS V ( ) Highlights The UMTS DL Measurement Suite is a collection of software tools for use with PXI 3000 RF Modular Instruments and application software that together provide best in class performance for characterizing UMTS Downlink signals;. Summary of UMTS Measurement Functions 3GPP TS Transmitter Characteristics Base Station Power P-CPICH Power 6.3 Frequency Error OBW Spectral Emission Mask ACLR Error Vector Magnitude PCDE RCDE 7.2 Receive Reference Sensitivity

2 Whether used for testing RF components, small cell or macro cell radio infrastructure the Cobham PXI modular instrumentation and UMTS Downlink Measurement Suite simplifies RF test system integration and increases test speed to accelerate new product introduction at lower cost. The UMTS Downlink Measurement Suite is complemented by a range of Cobham software tools for waveform generation, signal analysis and test sequencing. IQCreator PXI Studio PXI Maestro PXI Studio 2 application software provides an intuitive manual user interface to PXI 3000 instruments and measurement personality software for benchtop users. The auto signal detection feature for UMTS DL enables the user to simply connect the signal input and measure without any complex equipment configuration. Measurement results are presented in a variety of re-configurable graphical traces that make it easy to debug problems. The test sequencer component provides an out of the box production ready and speed optimized ATE solution using PXI Maestro software. Pre-defined waveform files are supplied ready to load and play in the PXI Vector Signal Generator for measurement of receiver reference sensitivity. Custom waveforms may also be generated using Cobham IQCreator waveform creation software. The UMTS DL Measurement Suite is supplied optionally with either 3030 Series or 3070A PXI Modular RF Digitizers. 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.

3 Figure 1. Code domain power Figure 2. ACLR

4 Figure 3. Spectral Emissions Results vs. Mask Figure 4. Modulation and Power

5 SPECIFICATION All specifications are defined when used in conjunction with 3030 Series or 3070A PXI RF Digitizers with option 110 enabled operating in specified UMTS downlink frequency bands. Test sequencing with PXI Maestro additionally requires option 210. For details of PXI 3000 RF Digitizer specifications refer to the appropriate module specification. Specifications are defined with input signal at the PXI RF Digitizer tuned frequency and at the reference level unless otherwise stated. Rx BLER measurement additionally requires a PXI 3000 signal generator module to be assigned configured to support I&Q vector modulation. MEASUREMENT CONFIGURATION Frequency Band Selection: None, I to XXII and XXV (excluding bands XV XVIII) Channel Selection: UARFCN or Hz Level See RF Digitizer maximum RF input External Path Loss 0 to db Detection UMTS Downlink Test Models as per table below or Auto Test Model None User defined channel types, SF, Channel code, Timing offset and mod type 1 4, 8, 16, 32 or 64 DPCH 2 3 4, 8, 16, 32 or 64 DPCH 4 with/without Common Pilot Channel 4DPCH and 1HS-PDSCH 5 6DPCH and 2HS-PDSCH 14DPCH and 4HS-PDSCH 30DPSCH and 8HS-PDSCH 6 4DPSCH and 4HS-PDSCH 30DPSCH and 8HS-PDSCH Channel Types Dedicated physical channel (DPCH) High speed physical downlink shared channel (HS-PDSCH) Primary common control physical channel (P-CCPCH) Secondary common control physical channel (S-CCPCH) Common pilot channel (CPICH) Shared control channel for HS-DSCH (HS-SCCH) Page indicator channel (PICH) Synch Method SCH or CPICH Slot Number 0 to 14 or random

6 Modulation Type QSPK, QAM16, QAM64 Number of HS-PDSCH 0, 2, 4 or 8 HS-PDSCH Channel Modulation QSPK, QAM16, QAM64 Number of DPCH 0, 2, 4 or 6 Channel I&Q Offset Removal Y/N MEASUREMENTS POWER Result Mean Power (dbm/3.84 MHz) - with/without RRC filter Mean P-CPICH power (db) P-CPICH power (db) vs. slot Captured power (dbm) vs. time Range The range is determined by the RF Digitizer noise floor in 3.84 MHz bandwidth, the maximum RF input level and the signal type. Nominal measured data for 3070A in Band V Noise Floor (dbm) in 3.84 Reference Level MHz (dbm) low noise mode Noise Floor (dbm) in 3.84 MHz low distortion mode Power Measurement Range (db) 30-39, -48 rrc filtered , -74 rrc filtered , -94 rrc filtered See RF Digitizer level accuracy specification +23 C ±5 C, ±-0.7 db (2 sigma) for input -20 dbr to 0 dbr W.R.T reference level FREQUENCY ERROR Result Hz Result output for a random or specified single slot Range ±6.5 khz, SNR >20 db As per reference standard ±10 Hz

7 OCCUPIED BANDWIDTH Result 99% Occupied Bandwidth (Hz) Range 10 MHz span Input >-40 dbm <100 khz with RF input above -40 dbm (SNR >25 db) SPECTRAL EMISSIONS Measured against 3GPP Spectral Emission Limits defined in tables and Additional Band Specific Spectral Emissions for bands II, IV, V, X, XII, XIII, XIV and XXV as defined in table 6.21A-C and for Home BS the Additional Requirements defined in table 6.21 D-E. Result Global Pass/Fail, peak level (db/nbw) and it s associated frequency (Hz) relative to the selected mask Segment Pass/Fail, peak level(db/nbw) and it s associated frequency (Hz) relative to the selected mask Mask reference trace and spectrum trace peak db/nbw versus frequency Range Measured across the downlink frequency range for the band selected Dynamic range >65 db for Input >-16 dbm ±0.6 db (2 Sigma) ACLR (ADJACENT CHANNEL LEAKAGE RATIO) Result Reference channel power (dbm/3.84 MHz) through RRC filter with Alpha 0.22 Absolute (dbm) or relative (dbc) upper/lower adjacent and alternate upper/lower channel offset powers (db/3.84 MHz) Dynamic Range TM1 64 DPCH input level >-15 dbm 303xC/ A Better than 60 db Better than 65 db Fig A TM1 64 DPCH at 900 MHz ±0.5 db (2 Sigma) for ACLR >-50 dbc

8 ERROR VECTOR MAGNITUDE (EVM) Modulation accuracy results are output for a specified slot 0 to 14 or a randomly selected slot and as either a composite measurement or a measured value for each channel Results EVM rms (%) peak/rms* Phase Error rms (degrees)* peak/rms Magnitude Error rms (%) * peak/rms Mean Frequency Error (Hz)* Mean PCDE (peak code domain error) (db)* IQ Origin offset (db) IQ Skew (degrees) IQ Gain Imbalance (db) Clock Error (ppm) * Trace display is available plotted versus slot number 0-14 Measured and Ideal Channel and Composite Constellations for the composite signal and for each logical channel type Peak results are tagged with chip position Range RF input >-20 db relative to reference level or 16 dbm whichever is the greater 0 to 25% <1% for EVM of 10%, typically 0.5 % Residual error <1%

9 CODE DOMAIN POWER Power distribution in each code normalised to the total signal power Reference channel power: dbm CPICH power: dbc relative to channel power (test model 2) Display of power vs code (colour coded) CODE DOMAIN ERROR (CDE) Result dbc value SF4 to 512 Array of powers for all codes relative to channel power and code domain errors See RF Digitizer specification Nominally 0.1 db/10 db 1 Residual Code Domain Error (RCDE) 1 Excluding the effects of noise

10 Residual Code Domain Error (RCDE) I& MODULATION WAVEFORMS RMC12.2k with data payload of All zeros, All one, PRBS

11 ORDERING INFORMATION When ordering please quote the full ordering number information. New instrument purchase: UMTS DL Measurement Suite 3030 option option 110 UMTS DL Test Sequencing 3030 option option 210 Retrofit Options Enable DL Measurement Suite RTROPT110/3030 RTROPT110/3070 Enable UMTS DL Test Sequencing RTROPT210/3030 (requires option 110) RTROPT210/3070 (requires option 110)

12 Cobham Wireless Longacres House, Six Hills Way, Stevenage, Hertfordshire, SG1 2AN, England T: +44 (0) E: Part No /052, Issue 3, 02/15