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Wi-Fi Compliance Test RF Power Measurement Challenges

Wi-Fi Compliance Test RF Power Measurement Challenges

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Abstract

Compliance test for Wi-Fi devices can be confusing and frustrating. Failing qualification can mean design turns that will delay the final product release, add development costs, and result in lost time to market.

Compliance test for Wi-Fi devices can be confusing and frustrating. Failing qualification can mean design turns that will delay the final product release, add development costs, and result in lost time to market. Engineers and technicians often need help understanding complex and convoluted compliance requirements. Moreover, it is essential that the results can be trusted. In addition, the instrumentation needed for testing can be expensive. For that reason protecting the investment is critical. The equipment should have the capability to measure the existing requirements, but also have broader capabilities that can be used as new or different requirements emerge.
Today’s Test Challenges:
Understanding Compliance Requirements
  • Partnering with companies who recognize the intricacies of the underlying measurements is essential.
  • Step-by-step tools ensure all the measurements are completed with the proper procedures.
  • Only capturing the data necessary for compliance determination allows for longer observation periods and lower data transfer requirements.
Greater Assurance of Test Results
  • Simple, intuitive software guides proper test procedures and reduces the risk of errant measurements.
  • Real-time processing acquisition engines ensure no bursts or signal anomalies are missed while processing measurements.
  • Greater time resolution enables users to see waveform abnormalities that might not otherwise be visible.
  • Less trigger jitter for more stable measurements.
  • Longer capture periods allow better understanding of device performance over time.
  • Tools used by industry leaders provide increased confidence in test results.
Protecting and Future-Proofing Investments
  • More capable instrumentation allows users to adapt to changing measurement requirements without additional investment.
    • Reduced rise times, better time resolution, and the ability to measure narrower pulse widths and greater pulse repetition frequencies permit measurement of a wider set of waveforms.
    • Wider measurement and trigger ranges provide more flexibility to adapt to changing test requirements.
    • Unique ability to provide peak-to-average power for individual and composite power measurements


 

Boonton Application Brief - Wifi Compliance TestThe Boonton RTP5006 ETSI EN 300 328 Test Application is an easy-to-use tool to walk a user step-by-step through making RF power measurements associated with 2.4 GHz Wi-Fi conducted compliance testing. Using one or more RTP5006 Real-Time Peak Power sensors and associated measurement buffer mode, the samples of each burst are averaged to provide the average (avg)/RMS power over the entire burst. The minimum, maximum, and avg/RMS power along with timing information for each burst are buffered to provide a continuous data set with no missed pulses for the entire observation period for each sensor in use. The coincident values of the avg/RMS power are summed then corrected for antenna gain and beamforming to yield the mean EIRP. Pass/fail compliance is determined from the results.
FEATURE Benefit
Compliance Test Application Step-by-step guidance to ensure proper measurement
Real-Time Power Processing™ Measurements in virtually real-time avoiding missed bursts
Industry-leading rise time 3 ns vs 13 ns; more than 4x faster
Industry-leading video bandwidth 195 MHz vs 30 MHz; more than 6x wider; wide enough for 80/160 MHz channel widths
Industry-leading time resolution Random Interleaved Sampling provides 100 ps resolution; 10x better
Wider measurement range +20 dBm to -60 dBm vs +20 dBm vs -35 dBm; 15 to 25 dB more measurement range
Narrower pulse width measurements 6 ns vs 50 ns; nearly 10x narrower measurement capability
Higher pulse repetition frequency capability 50 MHz vs 10 MHz; 5x higher
Wider trigger range and greater stability +20 dBm to -38 dBm vs +20 dBm vs -20 dBm; 18 dB more trigger range; Less than 100 ps trigger jitter
Longer capture time Virtually unlimited (measurement buffer mode) vs 1 s; ~ infinitely longer with API
Faster measurement rates 100,000 measurements (average, peak, and minimum) / s vs 50,000 measurements (single value) / s for limited count
Multi-channel synchronization Synchronize up to 8 channels for MIMO applications
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