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Rohde & Schwarz Unveils Upstream Analysis Option

A significant upstream cable modem DOCSYS analysis option was introduced at ANGACOM.

Rohde & Schwarz launched the popular R&S DSA DOCSIS signal analyzer in October 2017 to enable realtime analysis of high-speed DOCSIS 3.0 and DOCIS 3.1 signals. The company recently unveiled the new R&S DSA-K1500 upstream analysis option for cable modem testing.

Operators can use the compact analyzer to verify networks and network components meet DOCSIS requirements. The DSA-K1500 option provides additional functions for analyzing DOCSIS 3.0 and DOCSIS 3.1 upstream signals. The Rohde & Schwarz DSA together with the SFD DOCSIS signal generator form a compact test system for performing ranging tests on cable modems to provide information about the signal quality in the upstream direction. The handy DSA has top-notch RF characteristics and its low inherent error makes it ideal for measuring the modulation error ratio (MER).

The R&S DSA is the only DOCSIS analyzer that can be used without restrictions both in the field and at the cable headend. With the new DSA-K1500 option, it can now simultaneously analyze downstream and upstream signals. It achieves MER values greater than 50 dB because demodulation is handled by high-performance FPGAs instead of cable modem chipsets, which are typically designed for lower MER values.

To ensure interference-free coexistence of DOCSIS 3.0/3.1 and digital TV channels in cable TV networks, the R&S DSA can optionally analyze J.83/A/B and DVB-C digital TV signals. Here again users will appreciate the advantages of realtime signal processing, such as seamless error analysis, fast result presentation, signal demodulation and output.

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