As a professional RCA cable supplier, we introduce the basic structure and working principle of RCA cable in detail, as well as the comparison between RCA cable and other audio and video connectors, to help you better understand the advantages and application scenarios of this product.
Basic structure and working principle of RCA cable
RCA cable is one of the commonly used connectors in audio and video equipment, and is designed to provide high-quality analog signal transmission. RCA cable was first used for audio connection, and later for video equipment connection. Even today, RCA cable is still widely used in various home entertainment and professional audio systems.
1. Basic structure
RCA cable is simple and efficient in design, and is mainly composed of the following parts:
Center conductor: The core part responsible for transmitting the signal, usually made of copper, to ensure low-loss transmission of the signal.
Insulation layer: Isolates the center conductor from the outer shield to prevent mutual interference between signals.
Shielding layer: Generally composed of braided copper wire or metal foil, used to shield external electromagnetic interference and maintain the stability and integrity of the signal.
Outer insulation layer: The outermost layer of insulation material, usually PVC, protects the cable from physical damage and increases the service life of the cable.
Plug: The plug of the RCA cable is usually cylindrical and made of metal, providing a solid connection to ensure reliable signal transmission. The plug is usually divided into two parts: the central pin is responsible for signal transmission, and the outer metal ring is responsible for grounding.
RCA cables have different color markings to distinguish the type of signal transmitted:
Red and white: for audio signals of left and right channels.
Yellow: for composite video signal transmission.
2. Working principle
The working principle of RCA cable is based on the transmission of analog signals. Its core function is to transmit audio or video signals from the signal source (such as DVD players, TVs, audio equipment) to the receiving device. The signal is transmitted through the center conductor, while the shielding layer is used to block external interference to ensure the clarity and stability of signal transmission.
For audio signals, RCA cables transmit stereo information of left and right channels. Separate cables are used for each channel to ensure high-fidelity output of stereo sound effects. For video signals, RCA cables transmit composite video signals, which are usually used in analog devices. Although the picture transmitted by modern digital connectors is not as clear, it can still provide stable video output, especially in standard definition (SD) devices.
