(Synchronous CDMA) A cable modem technology from Terayon Communication Systems, Santa Clara, CA (www.terayon.com) that provides 10 Mbps transmission in both directions. Certified to the DOCSIS 2.0 specification in 2003, S-CDMA works well in noisy environments. It is suited for cable plants that are entirely coax based or that do not have optimum systems. In 2007, Terayon was acquired by Motorola.
A modulation technique that transmits 128 orthogonal codes simultaneously. S-CDMA is used in combination with 128-point quadrature amplitude modulation trellis-coded modulation (128-QAM TCM) in cable modems specified in the Data Over Cable Service Interface Specification (DOCSIS). See also 128-QAM, cable modem, DOCSIS, modulation, orthogonal, QAM, and TCM.