phase-shift sign
1North American call sign — Many countries have specific conventions for classifying call signs by transmitter characteristics and location. The North American call sign format for radio and television call signs follows a number of conventions. All call signs begin with a… …
2High German consonant shift — High German subdivides into Upper German (green) and Central German (blue), and is distinguished from Low German (yellow) and Dutch. The main isoglosses, the Benrath and Speyer lines, are marked in black. In historical linguistics, the High… …
3Orthogonal frequency-division multiplexing — Passband modulation v · d · e Analog modulation AM · …
4Antenna (radio) — Whip antenna on car …
5List of trigonometric identities — Cosines and sines around the unit circle …
6Radio transmitter design — In plate modulation systems the voltage delivered to the stage is changed. As the power output available is a function of the supply voltage, the output power is modulated. This can be done using a transformer to alter the anode (plate) voltage.… …
7Vibration — For the soul music group, see The Vibrations. For the machining context, see Machining vibrations. For the albums, see Vibrations (Roy Ayers album) and Vibrations (The Three Sounds album). Classical mechanics …
8Doppler effect — Change of wavelength caused by motion of the source. An animation illustrating how the Doppler effect causes a car engine or siren to soun …
9Bode plot — ; the straight line approximations are labeled Bode pole ; phase varies from 90° at low frequencies (due to the contribution of the numerator, which is 90° at all frequencies) to 0° at high frequencies (where the phase contribution of the… …
10Refractive index — Refraction of light at the interface between two media. In optics the refractive index or index of refraction of a substance or medium is a measure of the speed of light in that medium. It is expressed as a ratio of the speed of light in vacuum… …
