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RF faders (channel emulators) allow engineers to comprehensively evaluate wireless communication systems by predicting their performance in response to real-world conditions. The Keysight Technologies, Inc. N5106A PXB baseband generator and channel emulator is a comprehensive diagnostic toolset for designing and verifying wireless signal processing devices. Unlike dedicated faders, the PXB combines real-time fading with multichannel baseband generation and signal capture in a single, multipurpose instrument.
While the benefits of such a combination are numerous, it is reasonable to question if the fading provided by the PXB rivals that of a dedicated RF fader. This application note is intended to specifically address that question by benchmarking the fading performance of the Keysight PXB against two well-known RF fading solutions: the Spirent SR5500 Wireless Channel Emulator and the Elektrobit Propsim C8 multichannel emulator. Test results will show that the PXB has fading performance comparable to that of the Spirent SR5500 and Elektrobit C8, moreover, it fully satisfies the performance specification in 3GPP TS 34.121-1 v8.6.0.
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