How to Measure the Lowest EVM in WLAN Receiver Test

Get Quote
Expert Signal Analyzer
+ Expert Signal Analyzer
Expert Signal Analyzer
+ Expert Signal Analyzer

Measuring EVM in a WLAN Device Under Test with Two Spectrum Analyzers

Measuring the error vector magnitude (EVM) in WLAN receiver tests under challenging conditions such as wider modulation bandwidths that push the signals closer to the noise floor, requires a test system that can remove the noise contribution of the analyzer. The test system needs to isolate the noise coming from the device under test (DUT) from the rest of the measurement system, including the analyzer.

Two spectrum analyzers used as receivers in the cross-correlated EVM (ccEVM) technique capture and demodulate the same signal independently and cancel out uncorrelated noise added by the receivers to get a much lower EVM. This method provides accurate and reliable DUT EVM measurement in WLAN receiver tests, especially at higher-frequency and wider-bandwidth applications.

WLAN Cross-Correlated EVM Test Solution

Measuring the EVM in WLAN receiver tests requires canceling the uncorrelated noise contribution from the receivers, to get a much lower EVM for the DUT. The Keysight WLAN ccEVM test solution combines XA5 SA6210A Expert signal analyzer with N9077EM2E PathWave X-Series multi-touch applications software. The test system isolates the DUT noise from the rest of the measurement system by comparing the measured EVM on both signal analyzers to compute the true EVM caused by the DUT-generated noise and impairments. This provides highly accurate WLAN EVM measurements than previously possible with a single receiver.
Get Quote

See demo of a WLAN ccEVM measurement

Explore Products in our WLAN ccEVM Test Solution

Related use cases

How to Measure Accurate EVM for a DUT in 5G NR Systems

Measuring the true performance of a device under test (DUT) in 5G new radio (NR) receivers requires suppressing the test system’s EVM noise floor, especially at higher frequency and wider bandwidth applications. Learn how to suppress system noise using two receiver systems to get accurate and reliable DUT EVM measurement in 5G NR frequency range 1 (FR1) and FR2 applications.

Learn more

How to Test Power Consumption in IoT Devices

Measuring the low power consumption in IoT devices requires a test system that can overcome signal and power integrity challenges to measure low-power signals in the presence of noise. Learn how to drop the noise floor using a spectrum analyzer test system to allow for measurement of very small signals in IoT devices.

Learn more

How to Measure EVM of 802.11 WLAN Devices

Ensuring your wireless devices meet the next generation IEEE 809.11be standards and regulations requires use of a signal analyzer that supports both higher data rates and capacity. Learn how to perform WLAN modulation analysis with the lowest EVM noise floor.

Learn more

contact us logo

Get In Touch with One of Our Experts

Need help finding the right solution for you?

Contact Us