The setup features the R&S FSW high-end signal and spectrum analyzer equipped with an R&S FSW-B8001 option, supporting an 8.3GHz internal analysis bandwidth. This new hardware option will be available soon from Rohde & Schwarz.
In the setup, a wideband-baseband signal is upconverted to the selected 140 GHz frequency via a R&S TC RSE converter box. The world’s leading analog signal generator, the R&S SMA100B, provides the local oscillator frequency to the upconverter. The transmission is carried out over-the-air, with the converter connected to a horn antenna. The transmitted signal is received via another horn antenna and downconverted. The R&S FSW featuring the new, unique 8.3 GHz bandwidth option R&S FSW-B8001 analyzes the signal, carrying out signal quality measurements such as error vector magnitude (EVM) to assess the performance of the transmission. The company has demonstrated various common modulation formats. The new four-channel power supply R&S NGP800 by Rohde & Schwarz plays a vital role powering various parts and components in this setup.
These developments push the frequency boundaries into the sub-THz and THz frequency range and, continuing the process started with 5G, make testing over-the-air (OTA) mandatory. At these frequencies, RF frontends become even more integrated, and their characterization in terms of signal quality (EVM) and out-of-band emission (ACLR, SEM, spurious) requires a flexible OTA test setup, covering a wide frequency range, from microwave and mmWave to sub-THz.