signal
manifestation of information by variation of a physical phenomenon
Chirp
change in a signal's frequency over time
Chirp
change in a signal's frequency over time
luma
brightness in an image or video; part of information or signal describing the brightness (shade of grey) but not colour
video signal
signal encoding video
continuous signal
varying quantity whose domain
energy
signal processing concept
test card
signal test used in television broadcasting
dial tone
Telephony signal sent by a telephone exchange or private branch exchange (PBX) to a terminating device, such as a telephone
controlled variable
in control engineering, the variable that can be kept constant or deliberately changed through regulation
audio signal
representation of sound, typically as an electrical voltage
process variable
measured value of a particular part of a process which is being monitored, controlled, or regulated
chrominance
colour in an image or video; part of information or signal describing the colour (hue and saturation) but not brightness (shade of grey)
self-clocking signal
signal that can be decoded without the need for a separate clock signal or other source of synchronization
mark and space
states of a communications signal
Wow! signal
1977 narrowband radio signal from SETI
noise
in signal processing, unwanted modifications to a signal
disturbance variable
in control engineering, a variable that has a disturbing effect on the controlled variable
analog signal
signal where the time-varying feature is an analogous representation of some other time-varying quantity
digital signal
signal used to represent data as a sequence of discrete values
plant
in control theory, the combination of process and actuator
riding aids
equestrian sport
power good signal
electrical signal indicating that a power supply's voltage has stabilized and is ready for use
event-related potential
brain response that is the direct result of a specific sensory, cognitive, or motor event
reference variable
in control engineering, the input variable of the actuator
train horn signal
sound or sequence of sounds produced by a train horn
Optical and sound signals
the signals used by emergency services during emergency runs
discrete signal
time series consisting of a sequence of qualities
error variable
in control engineering, the deviation from the desired value
ringing
sound of a telephone bell
Letter beacon
radio transmissions consisting of only a single repeating Morse code letter
stop signal
telecommunication signal occurring at the end of part of a transmission
time signal
signal used as a reference to determine the time of day