Testing amplifiers for 5G with up to 2 GHz analysis bandwidth: Page 2 of 4

January 09, 2018 //By Martin Schmähling, Rohde & Schwarz
Testing amplifiers for 5G with up to 2 GHz analysis bandwidth
The future 5G cellular standard includes the transmission of signals in the microwave range at 28 GHz or 39 GHz with bandwidths of several hundred MHz. As a result, 5G component developers require a flexible test and measurement solution to analyse signals at these frequencies and bandwidths.

Testing signals with 2 GHz analysis bandwidth

Characterizing components with that frequency and bandwidth also requires a vector signal generator. The SMW200A is capable of delivering signal generation up to 40 GHz with up to 2 GHz bandwidth. A test setup based on the SMW200A for signal generation and the FSW for signal analysis is easy to operate, while providing industry-leading performance and bandwidth.

To make these wideband measurements, test instruments need high dynamic range and low input signal distortion. Meeting these criteria, the FSW provides a spurious free dynamic range (SFDR) of 60 dBc at 2 GHz bandwidth, allowing users to precisely determine the signal modulation quality, for example with measurements of error vector magnitude (EVM). To ensure reliable measurements on signals with very good EVM, the EVM generated by the instrument must itself be minimal. As a case in point, the FSW-B2001 option, along with its VSE-K96 OFDM analysis software, ensures reliable EVM measurements in the order of –40 dB with 800 MHz wide signals in the 28 GHz range.

The VSE-K96 OFDM analysis software enables users to measure modulation on non-standardized OFDM signals and offers a high degree of freedom in defining the measurement parameters. This flexibility provides a tremendous advantage, as the specification of OFDM signals has not yet been finalized in the 5G cellular standard.

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