subcarrier
Wave within wave
A subcarrier is a secondary signal that rides on a main carrier wave in radio or television transmission.
The primary carrier handles the basic signal while subcarriers add supplementary information—stereo audio in FM radio, color in analog television, or closed captions.
The stereo subcarrier operates at 38 kilohertz.
Message-conveying cue
- sidebandFrequencies beside the carrier
- spectrumContinuous range of values
- propagationAct of spreading widely
- attenuationGradual intensity reduction
interference · distortion · noise · SNR · filtering · demodulation · transponder · uplink
Rate of recurrence
- amplitudeMaximum oscillation displacement
- phaseDistinct period in sequence
- quadratureProcess of squaring numbers
- PSKPhase-shift keying
encoding · decoding · baseband · deviation · index · keying · analog · digital
Two-channel audio system
- audioTransmitted sound content
- videoRecorded moving imagery
- televisionBroadcast viewing device
- radioElectromagnetic wave receiver
Passage for transmission
- bandwidthData transmission capacity
- spacingInterval arrangement between objects
- orthogonalAt right angles
- pilotOne who steers aircraft
interleaving · subchannel · tone · bin · allocation · division · parallel · composite
signal
Message-conveying cue
- sidebandFrequencies beside the carrier
- spectrumContinuous range of values
- propagationAct of spreading widely
attenuation · interference · distortion · noise · SNR · filtering · demodulation · transponder · uplink · downlink
frequency
Rate of recurrence
- amplitudeMaximum oscillation displacement
- phaseDistinct period in sequence
- quadratureProcess of squaring numbers
PSK · encoding · decoding · baseband · deviation · index · keying · analog · digital · binary
stereo
Two-channel audio system
- audioTransmitted sound content
- videoRecorded moving imagery
- televisionBroadcast viewing device
radio · satellite · cable · FM · NTSC · PAL · SCA · SAP · multiplex · digital
channel
Passage for transmission
- bandwidthData transmission capacity
- spacingInterval arrangement between objects
- orthogonalAt right angles
pilot · interleaving · subchannel · tone · bin · allocation · division · parallel · composite · aggregate