1. The VGA interface is also known as the D-Sub interface. The interface has 15 pins divided into 3 rows of 5 pins each. The interface is D-type and is used to transmit analog signals. VGA has a mature manufacturing process and a wide range of applications. It is the most common port for analog signal transmission and is found in all products such as monitors, TVs and projectors. So it has a wide audience and is supported by most video devices.

2. VGA is a video transmission standard with the advantages of high resolution, fast display rate and rich colors. When it comes to this interface, it goes back to the CRT era. Due to design and manufacturing reasons, the CRT display can only accept the input of analog signals, it basically contains (r) (g) (b) (h) (v) five components, no matter what type of interface is connected, its signal at least contains these five components.

3. Use VGA to connect the device, the cable length should not exceed 10 meters, and pay attention to whether the connector is firmly installed, otherwise it may cause ghost images in the image, and VGA can only transmit video signals, not audio, and because it is an analog information, so the signal is extremely susceptible to interference.