The RF connector interface is a radio frequency interface.
The RF interface is a radio frequency interface.
It is the interface mode adopted by the current family cable television. The principle of RF imaging is to mix and encode video signals (CVBS) and audio signals (Audio), and then perform a series of separation/decoding processes inside the display device to output imaging.
Because the steps are cumbersome and the audio and video mixed encoding will interfere with each other, its output quality is also the worst. The graphics card with this kind of interface only needs to connect the cable TV signal line.
The basic workflow of the RF interface:
The reader sends a radio frequency signal of a certain frequency through the transmitting antenna. When the radio frequency card enters the working area of the transmitting antenna, an induced current is generated, and the radio frequency card obtains energy and is activated; the radio frequency card transmits its own encoding and other information through the built-in transmitting antenna of the card;
The system receiving antenna receives the carrier signal sent from the radio frequency card, and transmits it to the reader through the antenna adjuster. The reader demodulates and decodes the received signal and then sends it to the background main system for related processing; the main system judges based on logical operations According to the legality of the card, corresponding processing and control are made for different settings, and command signals are issued to control the action of the actuator.
The RF interface is an antenna interface and a must-have interface for old-fashioned cable television, and it is also a very antique standard. Its development in our country can even be traced back to the 1980s.
The RF interface is the interface mode adopted by the current family cable television. The principle of RF imaging is to mix and encode video signals (CVBS) and audio signals (Audio), and then perform a series of separation/decoding processes inside the display device to output imaging.
The RF interface has become more and more useless as the digital set-top boxes provided by broadband vendors upgrade, and even some Internet TVs no longer provide RF input interfaces.
