Rohde & Schwarz News Magazine

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First solution for analyzing DOCSIS 3.1 signals

The new data over cable service interface specification (DOCSIS) 3.1 ensures fast data transfer via existing hybrid fiber coax (HFC) cable TV networks. Manufacturers of cable headends, cable modems and network components as well as cable network operators can now take advantage of the R&S®DSA PC analysis software in preparation for the planned rollout of this standard. It works in combination with the R&S®FSW signal and spectrum analyzer, which records signals using OFDM vector signal analysis. The software analyzes recorded I/Q samples and outputs diverse MER values as well as bit and codeword error statistics that comprehensively describe the quality of a DOCSIS 3.1 signal. The R&S®DSA software provides a straightforward graphical display of MER versus subcarriers to allow easy detection of interferers and other negative influences in the transmission channel. The analysis solution is optimized for use in the development of cable TV network components but can also be used for testing entire network segments under lab conditions. This is especially easy when it is coupled with the R&S®CLGD DOCSIS cable load generator presented by Rohde & Schwarz last year.

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