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Understanding Upstream Modulation Profiles

Overview Modulation profiles define how information will be transmitted upstream, from a cable modem to the cable modem termination system (CMTS). Many upstream modulation profile variables can be changed, such as guard time of the burst, preamble, modulation (quadrature phase shift keying [QPSK] or 16-quadrature amplitude modulation [QAM]), and forward error correction (FEC) protection. Cisco has created three default profiles, qpsk, 16qam, and mix to eliminate confusion, but changes may be necessary depending on the application.

Further White Paper Details
Publisher	Cisco Systems	File Format	PDF
Date Published	January 2003	Downloads	14
Format	White Papers
Topics	Modems

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