Software that can analyze DOCSIS 3.1 signals

Software that can analyze DOCSIS 3.1 signals

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By eeNews Europe

The data over cable service interface specifications (DOCSIS) 3.1 provide fast data transmission over hybrid fiber coaxial (HFC) networks. To prepare for the planned rollout of the standard, manufacturers of cable headends, cable modems and network components as well as cable TV network operators can now use the DSA analysis software from Rohde & Schwarz. Users are able to perform high-quality BER and MER measurements on real-life DOCSIS 3.1 signals.

The DSA software works in combination with the FSW high-end signal and spectrum analyzer, which records the signals using OFDM vector signal analysis software. The FSW provides an analysis bandwidth of 320 MHz and can therefore be optimally adapted to different signal levels and bandwidths.

DSA analyzes the I/Q samples recorded by the FSW and outputs diverse MER values as well as bit and codeword error statistics that comprehensively describe the quality of a DOCSIS 3.1 signal. DSA software provides a straightforward graphical display of MER versus subcarrier to allow easy detection of interferers and other negative influences in the transmission channel.

The analysis system from Rohde & Schwarz is optimized for use in the research and development of cable TV network components. It allows the signal quality of modulators for the DOCSIS 3.1 downstream to be tested when developing cable headends. For cable TV network components, the analysis software makes general performance measurements. The software is also able to measure complete network segments under lab conditions. These measurements can be performed using the company’s CLGD DOCSIS cable load generator, which was launched by in May 2014 as the first DOCSIS 3.1 signal generator on the market.

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