Rohde & Schwarz to debut DOCSIS analyser

Rohde & Schwarz will use ANGA COM to debut its DOCSIS analyser with a new upstream analysis option.

In October, Rohde & Schwarz launched the R&S DSA DOCSIS signal analyser to enable real-time analysis of high-speed DOCSIS 3.0 and DOCIS 3.1 signals. Now the company is unveiling the new R&S DSA-K1500 upstream analysis option for cable modem testing.

Cable network operators can use the analyser to check whether their networks and network components meet DOCSIS requirements. With the R&S DSA-K1500 option, the analyser now provides additional functions for analysing DOCSIS 3.0 and DOCSIS 3.1 upstream signals. The R&S DSA together with the R&S SFD DOCSIS signal generator from Rohde & Schwarz forms a test system for performing ranging tests on cable modems to provide information about the signal quality in the upstream direction.

The company claims that the R&S DSA is ideal for measuring the modulation error ratio (MER), for installing, maintaining and servicing cable modem termination systems (CMTS) at cable headends, and for troubleshooting complex headend problems as well as problems with cable network components that occur in the field.

The device can be used both in the field and at the cable headend. With a new R&S DSA-K1500 option, it can simultaneously analyse downstream and upstream signals. According to the company, 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.

Rohde & Schwarz is exhibiting at ANGA COM on stand 8.R50