A color television system is identical except that an additional signal known as chrominance controls the color of the spot.

A demodulator recovers the video signal and sound as an FM signal at the offset frequency ( this is known as intercarrier sound ).

They are known for their alarm signal: when startled or frightened, a swimming beaver will rapidly dive while forcefully slapping the water with its broad tail, audible over great distances above and below water.

The bilinear transform ( also known as Tustin's method ) is used in digital signal processing and discrete-time control theory to transform continuous-time system representations to discrete-time and vice versa.

Once the keys had been pressed they were locked down until mechanical contacts in a distributor unit passed over the sector connected to that particular keyboard, when the keyboard was unlocked ready for the next character to be entered, with an audible click ( known as the " cadence signal ") to warn the operator.

A great deal is known about low-level signal processing in sensory systems, but the ways by which sensory systems interact with each other, with " executive " systems in the frontal cortex, and with the language system are very incompletely understood.

The fluorescence signal is captured by a photomultiplier a known distance downstream of the de Laval nozzle.

Once the keys had been pressed they were locked down until the contacts again passed over the sector connected to that particular keyboard, when the keyboard was unlocked ready for the next character to be entered, with an audible click ( known as the " cadence signal ") to warn the operator.

A reference signal of a known frequency near the unknown frequency is mixed with the unknown frequency in a nonlinear mixing device such as a diode.

Frequency modulation is known as phase modulation when the carrier phase modulation is the time integral of the FM signal.

In electric guitars, transducers known as pickups convert string vibration to an electric signal, which in turn is amplified and fed to speakers, which vibrate the air to produce the sounds we hear.

G protein coupled receptors ( GPCRs ), also known as seven-transmembrane domain receptors, 7TM receptors, heptahelical receptors, serpentine receptor, and G protein-linked receptors ( GPLR ), comprise a large protein family of transmembrane receptors that sense molecules outside the cell and activate inside signal transduction pathways and, ultimately, cellular responses.

Until 2000 the precision of the GPS signal available to non-U. S .- military users was deliberately severely limited by a timing pulse distortion process known as selective availability.

The secondary stations receive this pulse signal from the primary, then wait a preset number of milliseconds, known as the secondary coding delay, to transmit a response signal.

This incident led to German Admiral Dönitz issuing the Triton Null signal on 17 September 1942, which came to be known as the " Laconia Order "; the signal forbade submarine commanders from rescuing survivors from torpedoed ships.

The signal has also been known to confuse home theater line doublers ( devices for improving the quality of video for large projection TVs ) and some high-end television comb filters.

Ξ < sub > 1 </ sub > and Ξ < sub > 2 </ sub > are known as the two pump waves, with Ξ < sub > 3 </ sub > being the signal wave, and Ξ < sub > 4 </ sub > being the generated conjugate wave.

Agnus includes sub-components known as the blitter ( fast transfer of data in memory without the intervention of the processor ) and the copper ( management of the monitor signal ).

Up to 30 % of all human proteins may be modified by kinase activity, and kinases are known to regulate the majority of cellular pathways, especially those involved in signal transduction.

It is possible to make a doppler radar without any pulsing, known as a continuous-wave radar ( CW radar ), by sending out a very pure signal of a known frequency.

Due to the averaging it is far more stable than any clock would be alone ( see signal averaging for a discussion ).

In these systems, the external adaptor also included its own clock, and used that to signal the SCC instead of it taking its signal from the SCC's internal clock.

In telecommunications, asynchronous communication is transmission of data without the use of an external clock signal, where data can be transmitted intermittently rather than in a steady stream .< ref >

By calculating the maximum time that electrical signals can move in various branches of a CPU's many circuits, the designers can select an appropriate period for the clock signal.

In setting the clock period to a value well above the worst-case propagation delay, it is possible to design the entire CPU and the way it moves data around the " edges " of the rising and falling clock signal.

For example, a clock signal is subject to the delays of any other electrical signal.

Higher clock rates in increasingly complex CPUs make it more difficult to keep the clock signal in phase ( synchronized ) throughout the entire unit.

This has led many modern CPUs to require multiple identical clock signals to be provided to avoid delaying a single signal significantly enough to cause the CPU to malfunction.

One method of dealing with the switching of unneeded components is called clock gating, which involves turning off the clock signal to unneeded components ( effectively disabling them ).

Another method of addressing some of the problems with a global clock signal is the removal of the clock signal altogether.

While removing the global clock signal makes the design process considerably more complex in many ways, asynchronous ( or clockless ) designs carry marked advantages in power consumption and heat dissipation in comparison with similar synchronous designs.

While somewhat uncommon, entire asynchronous CPUs have been built without utilizing a global clock signal.

Rather than totally removing the clock signal, some CPU designs allow certain portions of the device to be asynchronous, such as using asynchronous ALUs in conjunction with superscalar pipelining to achieve some arithmetic performance gains.

The term analog signal usually refers to electrical signals ; however, mechanical, pneumatic, hydraulic, and other systems may also convey analog signals.

* flanger-to create an unusual sound, a delayed signal is added to the original signal with a continuously variable delay ( usually smaller than 10 ms ).

This is usually applied to the entire signal, and not to each note separately.

In an electronic amplifier, the input " signal " is usually a voltage or a current.

This inputs a video signal and its separate timecode audio signal, reads the timecode, superimposes the timecode display over the video, and outputs the combined display ( usually via composite ), all in real time.

Coaxial cable is usually used to carry the cable television signal into a residence.

The cable company's portion of the wiring usually ends at a distribution box on the building exterior, and built-in cable usually distributes the signal through the walls to jacks in different rooms to which televisions are connected.

The first step is usually to convert the signal from an analog to a digital form, by sampling and then digitizing it using an analog-to-digital converter ( ADC ), which turns the analog signal into a stream of numbers.

A number of glands that signal each other in sequence are usually referred to as an axis, for example, the hypothalamic-pituitary-adrenal axis.

This type of circuit is usually called " mixed signal " rather than analog or digital.

* In pro audio, " bus " refers to a place in the audio signal chain where one can hear a mix of different audio signals — usually at the output of a mixing console.

* Emission ( radiocommunications ), the radio signal ( usually modulated ) emitted from a radio transmitter

Potentiometers in the actuator send a signal back to the computer ( usually a negative voltage ) reporting the position of the actuator.

The number of hormone molecules available for complex formation is usually the key factor in determining the level at which signal transduction pathways are activated, the number of hormone molecules available being determined by the concentration of circulating hormone, which is in turn influenced by the level and rate at which they are secreted by biosynthetic cells.

Like the rock-blues icons that preceded them, fusion guitarists usually played their solid body instruments through stadium rock-style amplification, and signal processing " effects " such as simulated distortion, wah-wah, octave splitters, compression, and flange pedals.

The advantages to DCC are that track voltage is constant ( usually in the range of 20 volts AC ) and the command throttle sends a signal to small circuit cards, or decoders, hidden inside the piece of equipment which control several functions of an individual locomotive, including speed, direction of travel, lights, smoke and various sound effects.

Proto-oncogenes are often involved in signal transduction and execution of mitogenic signals, usually through their protein products.

Radial movement is usually linked with Doppler frequency to produce a lock signal that cannot be produced by radar jamming signals.

This signal is known as RGBS ( 4 BNC / RCA terminated cables exist as well ), but it's not directly compatible with RGBHV used for computer monitors ( usually carried on 15-pin cables terminated with 15-pin D-sub or 5 BNC connectors ), which carries separate horizontal and vertical sync signals.