Colorburst

A burst signal in communications technology, particularly in television technology, and electrical measurements a limited number of fixed-frequency oscillations; so it has a certain, fixed period. As opposed to a continuous sine wave signal having only a frequency component of a burst signal, the bandwidth is greater, the shorter is the burst. Burst signals are used for testing purposes or to temporarily transfer the information of the phase and the frequency of oscillation.

Applications

PAL burst

In the field of analog television equipment such as a PAL burst signal is used to provide the correct phase and frequency of the color carrier from the transmitter to the television receiver. Using this information, the correct demodulation of the color information is carried out. In the figure alongside the so-called color burst a PAL signal is presented, which is transmitted immediately after the line sync pulse. This approximately 2.3 microseconds long burst represents the color carrier of the transmitter with a frequency of 4.43361875 MHz in this case dar.

Multi Burst

In metrology burst signals are generated with special test generators. A sequence of burst signals of different frequencies will be referred to as a multi- burst signal and allows a simple estimate of the frequency response or the bandwidth of a transmission channel. The transmitted signal is considered to an oscilloscope.

A multi-burst signal is also part of many television test patterns. Approximately in the middle of the figure, to the left of the orange rectangle can be seen from left to right narrowing vertical lines. Each line corresponds to a distance video frequency; lines represent the normally -frequency packages of 1 MHz to 5 MHz. A weakening of the respective frequency is noticeable by the low contrast of the lines. A similar system for bandwidth provision in the television and video technology are the frequency broom.

Measurements on loudspeakers

Burst signals can be used for measurements on loudspeakers. This technique has the advantage that reflections impinging on the walls after the burst to the measuring microphone and, in contrast to measurements with sinusoidal signals therefore not anechoic room is needed.

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