The voltage levels in an RGB video signal vary depending on the specific implementation and standard, but typically the voltage swing for each color component (Red, Green, Blue) is 0.7 volts (peak-to-peak).
Here's a breakdown:
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Voltage Range: Each color component (R, G, and B) typically ranges from 0V (black) to 0.7V (maximum intensity for that color). This 0.7V peak-to-peak voltage is the standard.
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Individual Components: The voltage levels for red, green, and blue independently determine the color displayed on the screen. By varying the voltage of each component, a wide range of colors can be created.
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Synchronization: RGB signals often include separate synchronization signals (horizontal and vertical sync). The voltage levels for these signals also have their own specifications, usually based on TTL levels (0V and 5V). However, the question specifically asked about the video signal, so the focus remains on the 0.7V for the RGB components.
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Example:
- R = 0.7V, G = 0V, B = 0V would display pure red.
- R = 0.7V, G = 0.7V, B = 0.7V would display white (at maximum intensity).
- R = 0V, G = 0V, B = 0V would display black.
It is important to note that different interface types (VGA, component video, etc.) might have slightly different implementations, but the underlying 0.7V standard is generally followed for the video portion of the signal.
