RCA arayüzü
First of all, RCA interfaces are very common in our daily life, such as speakers, TVs, power amplifiers and other equipment. The RCA interface is named after the Radio Corporation of America, which introduced the interface to the market in the 1940s and used it to connect devices such as phonographs and speakers. Therefore, the RCA interface is also known as the PHONO interface in Europe and the United States, which is also commonly known as the "Lotus interface".
Sinyal iletimi açısından, RCA arayüzü sinyallerin koaksiyel iletim yöntemini benimser, sinyalleri iletmek için merkezi eksen kullanılır ve dış kenar etrafındaki temas katmanı topraklama için kullanılır. Her bir RCA kablosu, bir kanalın ses sinyalini iletmekten sorumludur, bu nedenle kullanıcılar, kullanılan kanalların ihtiyaçlarına göre kanal sayısıyla eşleşen RCA kablolarını kullanabilir. Örneğin iki kanallı bir stereo sistem oluşturmak istiyorsak iki adet RCA kablosuna ihtiyacımız var.
XLR arayüzü
XLR connectors are also known as "cannons" because Cannon Electric, founded by James H. Cannon, was its original manufacturer. Their earliest product was the "cannon X" series, and later the improved product added a locking device (Latch), so an "L" was added after the "X". Later, a rubber compound (Rubber compound) was added around the metal contacts of the connector, so an "R" was added after the "L". Therefore, people later combined these three capital letters and named it the XLR interface.
Genelde gördüğümüz XLR fişleri 3-pindir, elbette 2-pin, 4-pin, 5-pin, 6-pin vardır. Örneğin, bazı üst düzey kulaklık kablolarında genellikle dört pimli XLR dengeli konektörler görüyoruz. XLR arayüzü, ses dengeli sinyalleri iletmek için kullanılabilen "büyük üç çekirdekli" TRS arayüzü ile aynıdır.
Since the balanced signal is mentioned, let's briefly talk about the balanced signal and the unbalanced signal: after the sound wave is converted into an electrical signal, if it is transmitted directly, it is an unbalanced signal; if the original signal is inverted 180 degree , and then the original signal is transmitted at the same time. signal and an inverted signal, then this is a balanced signal. Balanced transmission is to use the principle of phase cancellation to minimize other interferences in the audio signal transmission process (to achieve clearer sound quality). Of course, the XLR interface mentioned above is also the same as the "big three-core" TRS interface, which can transmit unbalanced signals; therefore, if we look at the interface alone, it is basically impossible to see whether it transmits balanced signals or unbalanced signals.
