Rohde & Schwarz, in collaboration with Broadcom, is set to display its CMX500 multi-technology multi-channel signalling tester at MWC Barcelona 2026 with newly added Wi-Fi 8 (IEEE 802.11bn) testing capabilities. The setup at the Rohde & Schwarz booth (5A80) will validate a prototype Wi-Fi 8 device from Broadcom, showcasing physical layer features unique to Wi-Fi 8.
Addressing UHR challenges with the CMX500
As Wi-Fi transitions beyond increasing throughput, the IEEE 802.11bn amendment introduces crucial advancements focused on delivering consistent, high-quality connectivity across a diverse range of dense environments. It is designed to handle the growing number of connected devices and the increasing demands of applications like VR/AR, 8K streaming, and industrial IoT.
Wi-Fi 8 builds upon the foundation of Wi-Fi 7, retaining core physical layer parameters like supported frequencies up to 7.125 GHz, channel bandwidths up to 320 MHz and 4096QAM modulation, as well as Multi-Link-Operation (MLO). However, to achieve its UHR goals, IEEE 802.11bn introduces a suite of innovative PHY and MAC layer technologies that present new testing hurdles. At MWC 2026, visitors can experience how to address key testing challenges associated with Wi-Fi 8 with the enhanced testing capabilities of the CMX500 one-box signalling tester, one of the most versatile mobile device test platforms in the market, which supports many of the demanding features of Wi-Fi 7 and Wi-Fi 8 today.
For example, Wi-Fi 8 uses distributed resource units (dRU) to overcome power spectral density (PSD) limits. With dRU measurement,s users can validate their device’s effectiveness in boosting uplink transmit power and improving connection reliability. Another technology is unequal modulation (UEQM), where throughput is improved in difficult reception scenarios by allowing each MIMO link to use a different modulation scheme. With UEQM analysis, users can assess the ability of the test device to adapt the modulation accurately, using the specified modulation of coding scheme (MCS) combinations. With comprehensive signalling mode tests, covering a broad range of Wi-Fi 8 features, users can perform in-depth analysis of performance characteristics.
Future-ready platform for all cellular and non-cellular standards
The CMX500 is a modular, powerful one-box signalling tester enabling comprehensive multi-technology testing. It covers LTE and NR in SA/NSA modes, NR-NTN, NB-NTN, Direct-to-Cell (D2C/DTC) testing and WLA, N, including Wi‑Fi 7 and Wi‑Fi 8. Consequently, the CMX500 allows R&D engineers of wireless devices to comprehensively test their design’s operation in both cellular and non-cellular standards of the latest generation in a single instrument setup.
Rohde & Schwarz will present the CMX500 one-box signalling tester, validating a Wi-Fi 8 device from Broadcom and other comprehensive test solutions for next-generation WLAN at MWC Barcelona 2026 at the Fira Gran Via in Barcelona, in hall 5, booth 5A80.
