FM calls for high power led fog lights

We are accustomed to using FM to refer to FM radio (76-108MHz, in our country for the 87.5-108MHz, Japan, 76-90MHz), in fact, FM is also a modulation mode, even in the short-wave range of 27-30MHz , as the band of amateur radio, space and satellite communications applications, the use of frequency modulation (FM). FM radio is a FM radio.

high power led fog lights are one of led streetlight. FM calls for high power led fog lights? FM is very important for future high power led fog lights.

Frequency modulation (FM) in the electronic music synthesis technology is one of the most effective synthesis techniques, it was first proposed by Stanford University, Dr. John. Zhuoning (JohnChowning). In the 1960s, Zhuoning at Stanford University began trying to use different types of vibrato, he found to increase beyond a certain point of time when the frequency of the modulation signal, the vibrato effect will disappear in a modulated voice, replaced by a new, more complex sound.
Seems today, Zhuoning was only the completion of the radio emission is most commonly used FM technology (ie FM radio). Zhuo Ning’s accidental discovery, while filling the traditional FM technology in sound synthesis has a new arena. When Zhuoning comprehend the basic principles of the FM modulator, he immediately began to study FM theoretical synthesis technology, and in 1966 became the first person to use FM technology to make music.

The audio signal change is often cyclical, one of the easiest example to understand the audio modulation Violin Vibrato, Vibrato through the fingers and wrist on the strings quickly fibrillation undergoing rapid changes in the length of the strings, which ultimately affect the violin sound softness. FM radio waves, FM synthesis theory “also has a pronunciation (vector), and modulation of body two elements. Pronunciation body, said carrier body is the actual sound frequency oscillator; modulation body or modulator is responsible for adjustments and changes the carrier arising out of the sound. Carrier frequency, modulation of body frequency and modulation magnitude is an important factor in the theory of FM synthesis.
Most basic FMinstrument include two sinusoidal oscillator, a stable carrier frequency fc (CarrierFrequnecy) oscillator; a modulation frequency fm (ModulationFrequency) oscillator. The carrier frequency was added to the output of the modulation oscillator. The carrier oscillator is a simple sine wave frequency with fc frequency modulator occurs, the signal from the modulation oscillator with fm frequency sine wave, driven by the carrier oscillator frequency upward or downward movements For example, a 250Hz sine wave modulation wave modulation of a 1000Hz sine wave carrier, it means the carrier generated 1000Hz frequency per second to accept the 250 modulation. System of the body and the carrier body are frequency, amplitude, waveform, periodic or quasi-periodic oscillator.
In frequency modulation, the modulation amplitude of the same frequency modulation play a key role in modulation of body amplitude affects the depth of the change in carrier frequency modulated, the amplitude of the modulation signal is 0, and will not appear on any modulation, so that, on as in amplitude modulation (AM), the modulation frequency of the carrier affect the amplitude of the same carrier frequency change is also subject to the amplitude of the modulation of body size of the impact of changes in frequency modulation (FM).
Therefore, in the process of frequency modulation, we can find: 1. The rate of change of the modulation frequency of the body the frequency of the carrier body. (2) modulation depth variation of the amplitude of the carrier frequency. (3) modulation of the waveform (or timbre) of the carrier frequency of the waveform changes. (4) the amplitude of the carrier body in the frequency modulation process remains unchanged.