Baseband Definition

(telecommunications) The frequency range occupied by a message signal prior to modulation.

(telecommunications, noun adjunct) A method of transmission in which only one frequency channel is used at a time.

(electronics) A device using baseband transmission.

A single-channel transmission system, i.e., a transmission system that supports a single transmission at any given time. All contemporary wired local area networks (LANs) are baseband. See also broadband, channel, and LAN.