TRANSMISSION

**Definition:** This place covers:

The transmission of information carrying signals, the transmission being independent of the nature of the information. Monitoring and testing arrangements and the suppression and limitation of noise and interference.

The user is referred to the IPC definitions of individual main groups of subclass H04B :

Transmission systems characterised by the waveband used for transmission:

Radio waves - see definition for main group H04B7/00 .

Light, infrared waves or corpuscular radiation - see definition for main group H04B10/00 .

Ultrasonic, sonic or infrasonic waves - see definition for main group H04B11/00 .

Transmission systems characterised by the medium used for transmission:

Conductors - see definition for main group H04B3/00 .

Free-space propagation - see definition for main groups H04B5/00 , H04B7/00 , H04B10/00 , H04B11/00 .

Earth, water or body - see definition for main group H04B13/00 .

Transmission systems characterised by the carrier modulation used for transmission:

Pulse modulation - see definition for main group H04B14/00 .