How to test an RCA cable
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RCA cables were first introduced by the Radio Corporation of America (RCA) in the 1940s as a means of transmitting mono audio signals. Over time, the cables were adapted to support stereo audio, as well as video signals. RCA cables are still widely used today, although they are being gradually replaced by digital connections such as HDMI.
RCA cables are typically made up of three connectors: a yellow one for composite video and red and white ones for left and right audio channels. They can be easily identified by the distinctive color coding of their connectors and their common use in consumer electronics.