A walk on the T&M side
Viavi Solutions Inc. showed off the latest version of its OneExpert signal analyzers, the ONX-580, which is capable of characterizing both MPEG and OFDM streams. The company said the model on display was its first to incorporate a DOCSIS 3.1 chipset (the chipsets have been available from Broadcom in sample amounts for several months).
Comsonics showed a tester that ordinarily would be used for leakage detection but has been repurposed to detect potential interference from LTE-U.
Averna 's DP-1000 DOCSIS tester, typically used for qualification/certification, was being used for one demo.
Trilithic Inc. was showing a D3.1 field tester capable of characterizing PLCs (physical layer link channels). The company will soon be commercially offering a firmware upgrade, followed by a hardware upgrade with a D3.1 chipset built in. The idea is to get a tester with enough baseline capabilities to enable field technicians to validate D3.1 deployments.
Keysite Technologies was doing signal analysis using its 86900 software to characterize the OFDM signals. OFDM is a modulation scheme common to WiFi and cellular communications, but new to cable as part of DOCSIS 3.1. The characterization challenge, Keysight representatives said, is that in D3.1, OFDM bit densities are far, far denser than in any other applications.
FutureWei 's Jack Moran, showing off a distributed CCAP system from Huawei, endorsed the Rohde & Schwarz GmbH & Co. KG tester being used to show a constellation diagram. "The only thing that can analyze it is a Rohde & Schwarz signal analyzer," Moran said.
— Brian Santo, Senior Editor, Components, T&M, Light Reading