subchannel

Noun

 * 1)  A distinct division of a channel or frequency band.
 * 2)  An additional frequency owned by a television broadcaster used for less lucrative content.
 * 3)  A distinct part of an I/O channel associated with a specific device.
 * 1)  A distinct part of an I/O channel associated with a specific device.
 * 1)  A distinct part of an I/O channel associated with a specific device.