Component Video Cable : What is it?
Component video cables are 75-ohm coaxial cables that transmit video signals from a video source to an output load using electricity. They are composed of three color-coded cables and jacks representing the three segregated video signals: a red channel indicating a red minus total luminance (Pr), a green channel representing luminance (Y), and a B channel representing blue minus luminance (Pb). Each cable has its own shield and center conductor
Component video cables are normally used for DVD players and televisions, transmitting at 10 MHz frequencies for NTSC and 35MHz and above for HDTV. They are available in RCA, BNC, and VGA types.
Kinds of Component Video Cables include the following:
RCA component video cables
- RCA component video cables link RCA connectors to consumer electronic audio-video devices.
- Also known as Radio Corporation of America (RCA) cables, they are 3-channel, 75-ohm cables considered to be the standard connector forms for component video cables.
- Most models have three male RCA connectors.
- They measure six to 75 feet long.
BNC component video cables
- BNC component video cables are linked to bayonet-style BNC connectors.
- They are made up of two outside nubs on the outer contact and a tiny pin socket.
- Their jacks stick out from the back panel of an electronic device when viewed from behind.
- Most models have three male BNC connectors.
- They measure six to 50 feet long.
VGA component video cables
- VGA component video cables are linked to HD15 or VGA connectors composed of 15 pins arranged in three or five rows.
- They are mostly used in home theater projectors and in most devices with HD 15 connectors.
- However, some HD15-equipped devices do not accept component video cables from computer monitors and some data projectors.
- They measure six to 25 feet long.
|Connector: Choose a component video cable with gold-plated connectors for superior signal transmission and prevention of rust and corrosion. Make sure each connector is color-coded in its appropriate red, green, or blue color for easy identification.|
Impedance match: Choose a component video cable with a characteristic impedance of 75 ohms, as most, if not all, video devices are made to emit and receive video signals with that impedance value. Mismatches in impedance can result to video output ringing or ghosting (unsightly reflections that distort video quality).
Wire material: Look for a component video cable made of oxygen-free copper wiring for interference-free signal transmissions. Also, the lack of oxygen in the wiring makes the cable safer to use, preventing contact oxidation. Make sure the wiring is completely covered with protective jackets made of PVC or nylon for added safety. PVC jackets make the wires more flexible, preventing them from knotting or curling up.
Triple shielding: To prevent Electro Magnetic Interference (EMI) and Radio Frequency Interference (RFI) from causing signal degradation or even signal loss, look for a component video cable triple-shielded with copper braids and overlapping aluminum foils. This type of component video cable also blocks low-frequency noises coming from household appliances like fluorescent lights, transformers, and computers that can affect video transmission signals.
Center conductor: Choose a component video cable with a copper center conductor over one with a silver center conductor. Theoretically, silver is more conductive than copper, but some factors like silver’s wire gauge and thin plates offset its advantages over copper.
Compatibility: To effectively use your component video cable, make sure your DVD player, television, or projector is equipped with a component video cable-compatible connector like VGA, BNC, or RCA.
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