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Wi-Fi Compliance Test System with LabView-Powered Software Suite for performing physical layer measurements on WLAN standard signals. Based on modular PXI measurement platform.
- Physical layer up to 802.11ax (Wi-Fi 6).
- Desktop control and analysis software.
- Modulation analysis up to QAM-256.
- Network Traffic generator.
- Packet Filter.
- EVM, transmit power, power ramp, SEM measurements.
OVERVIEW
Measured parameters are logically divided into three groups:
- Measurements in the frequency domain (Spectrum);
- Measurements of modulation constellation parameters (Constellation);
- Measuring of time parameters (Power vs. Time).
STANDARDS
- IEEE 802.11 – Set of media access control (MAC) and physical layer (PHY) specifications for implementing wireless local area network (WLAN) computer communication in the 900 MHz and 2.4, 3.6, 5, and 60 GHz frequency bands.
- ETSI EN 300 328 V2.1.1 (2016-11) – Wideband transmission systems; Data transmission equipment operating in the 2,4 GHz ISM band and using wide band modulation techniques; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU
- ETSI EN 301 893 V2.0.7 (2016-11) – 5 GHz RLAN; Harmonised Standard covering the essential requirements of article 3.2 of Directive 2014/53/EU
- STB 1788-2009 – National Standard of Republic of Belarus. Radio communication. Broadband wireless access equipment. Requirements for radio equipment.
In accordance with the international standards, during the conduction of measurements WiFi equipment can operate in two modes:
- Regular mode of operation;
- Test mode of operation.
In the test mode of operation, the equipment manufacturer provides a sample to the laboratory with a test firmware, which allows to change schemes of modulation, power, frequency channels. In this mode of operation, spectrum and modulation measurements can be performed by any spectrum analyzer with the Wi-Fi analysis option (R&S, Agilent, Anritsu).
Through the experience it has been found that equipment suppliers can not provide samples with test firmware and the analysis requires testing in the normal mode. In this mode, a radio network is organized and a large data array is transferred in order to load the transmitter of the test sample. In regular mode, the sample dynamically changes settings depending on the quality of the radio channel. This leads to the fact that the spectrum analyzers can not perform measurements (all indicators "jump").
Measured Wi-Fi parameters
Hardware & software suite "UniTesS Wi-Fi/Bluetooth Test" allows you to measure the following Bluetooth parameters in accordance with STB 1788.
The hardware & software suite “UniTesS Wi-Fi/Bluetooth Test” allows measuring the following Wi-Fi parameters within the 2.4GHz and 5GHz bands in accordance with STB 1788 for IEEE 802.11 a / b / g / n operation modes.
- Range of operating frequencies;
- Operating time in one radio frequency channel;
- Permissible deviation of the symbol transmission frequency;
- Root-mean-square value value of the modulation error vector (RMS DEVM) for DQPSK;
- Root-mean-square value of the modulation error vector (RMS DEVM) for 8DPSK;
- Value of the modulation error vector, for 99% of symbols (99% DEVM) for DQPSK;
- Value of the modulation error vector, for 99% of symbols (99% DEVM) for 8DPSK;
- Peak value of the modulation error vector (Peak DEVM) for DQPSK;
- Peak value of the modulation error vector (Peak DEVM) for 8DPSK;
- Power ratio of parts of a package versus GFSK and DPSK modulation;
- Deviation of the radio transmitter frequency from the nominal value;
- Maximum power of the radio transmitter;
- Spectrum mask;
- Spurious emissions.
UniTesS Wi-Fi \ Bluetooth Test suite allows you to measure the following Bluetooth parameters in Bluetooth Version 2.1 and enhanced data rate (EDR) modes.
Measured Bluetooth parameters
Complete list of measured parameters:
- Full power (Total Average Power);
- Maximum average power (Maximum Average Power);
- Minimum average power (Minimum Average Power);
- Average power of the header and in the code area (Access Code and Header Average Power);
- Average power of the data area (Payload Average Power);
- Relative power of the data area (Payload Relative Power);
Modulation parameters:
- Mean Block RMS DEVM (%)
- Maximum Block RMS DEVM (%)
- Mean Symbol DEVM (%)
- Maximum Symbol DEVM (%)
- 99% DEVM (%)
- Mean Block RMS Magnitude Error (%)
- Maximum Block RMS Magnitude Error (%)
- Mean Block RMS Phase Error (deg)
- Maximum Block RMS
- Phase Error (deg)
- Mean Packet Initial Frequency Offset (Hz)
- Maximum Packet Initial Frequency Offset (Hz)
- Mean Block Absolute Frequency Offset (Hz)
- Maximum Block Absolute Frequency Offset (Hz)
- Mean Block Relative Frequency Offset (Hz)
- Maximum Block Relative Frequency Offset (Hz)
- Symbols below 99% DEVM Threshold (%)
- Impairments:IQ Gain Imbalance (dB)
- Impairments:Quadrature Skew (deg)
- Impairments:I DC Offset (%)
- Impairments:Q DC Offset (%)
- BER (%)
- Sample Population Used
- FER %
- Number of Frames Used
Spectral measurements:
- Peak Power
- Bandwidth
- Bandwidth High Frequency
- Bandwidth Low Frequency
- TxSpectrum
- ACP
- EDRInBandEmission
- LEInBandEmission
FUNCTIONALITIES
Hardware & software suite "UniTesS Wi-Fi \ Bluetooth Test" monitors the required packages and measures only the parameters of target frames, which makes it unique in the market of measuring equipment. This approach is well-established and tested in certification laboratories.
- Range of operating frequencies;
- Deviation of the radio transmitter frequency from the nominal value;
- Maximum power of the radio transmitter;
- Radio transmitter spectral density mask;
- Spectrum unevenness (flatness);
- Attenuation of the central frequency;
- Duration of the front and droop of a pulse;
- Deviation of the symbol transmission frequency from the nominal value;
- Peak value of the modulation error vector;
- Root-mean-square value of the modulation error vector;
- Spurious emissions of the receiver and transmitter
TECHNICAL FEATURES
According to the metrological characteristics of the "UniTesS Wi-Fi / Bluetooth Test" suite is classified as high-end equipment:
- Range of frequencies: 20 Hz - 14 GHz;
- Phase noise: -129 dBc/Hz at 10 kHz;
- Analysis instantaneous bandwidth: 50 MHz; noise level: -165 dBm/Hz;
- Amplitude accuracy: ±0.1 dB;
- Temperature stability ± 10 × 10 -9.
USER-CONFIGURABLE SETTINGS
- User-configurable settings:
- Standard - WLAN Standard;
- Operating frequency - Carrier Frequency;
- Expected level of the input signal - Expected Average Power;
- Attenuation in the path - External Gain;
- Observation time - Acquisition Length;
- Number of averages - Number Of Averages;
- Frequency span - Bandwidth;
- Synchronisation source - Clock Source.
The delivery package of "UniTesS Wi-Fi \ Bluetooth Test" suite includes a set of microwave cables, adapters, couplers, auxiliary equipment and software for network setup.
The hardware & software suite is built on the most modern platform PXI Express from National Instruments, which allows to carry out software upgrades to measure the parameters of equipment standards: LTE, HSPA, ZigBee, GSM/EDGE.
ADVANTAGES
- Compliance with the requirements of ETSI EN 300328, ETSI EN 301 893, IEEE 802.11, STB 1788;
- Possibility of software upgrade for measuring of parameters of LTE, HSPA, ZigBee, GSM / EDGE, WiMax equipment;
- Fully tested and adjusted solution for certification testing;
- Methods for performing measurements with the calculation of the uncertainty budget;
- The Hardware & software suite is completed with everything required for testing: set of microwave cables, adapters, couplers and other auxiliary equipment.
The developed software has a modular structure, which provides the ability to quickly adapt the software for testing of a wide range of samples. Each module in the software is independent of the other modules and provides measurement of a certain technical parameter of the equipment. The modular structure makes it possible to quickly modify the set of measured parameters in accordance with the requirements of the test program. Built-in mathematical modules provide a required representation and processing of primary measurement results.
Hardware & software suite "UniTesS Wi-Fi \ Bluetooth Test" has a built-in exceptional conditions handling mechanism which ensures correct handling of test errors and excludes the output of incorrect measurement results.
