What is a code detector and how does it work?

Hello, I just want to ask a question and see your question. I have studied code detector, but I am a typical person who can't learn it. I try to use the vernacular. Please forgive me if I don't speak well.

A code detector, as its name implies, is a machine that detects "code". The specialty is a radio direction finder. It is usually used for military spies. High-end code detectors will only be produced by the Arsenal. They have different shapes, but the basic shape is a mini version of a laptop or a mobile phone. Code detector can be used to detect remote control data, and crack, read and modify it (to put it bluntly, it is a hacker). Take the mobile phone as an example. After you detect the target mobile phone with the code detector, you can check all kinds of information in this mobile phone, which can stop the mobile phone and make it unable to connect. You can force the outgoing call of the target mobile phone to be connected to any number, intercept it after the target sends a short message, and then continue to send it after modification. Of course, code detectors can also invade computers and various computer-controlled machines. It also has the function of signal voltage locking, which can theoretically monitor the stock market in real time.

About the working principle ...

Code detector is a control system based on CPU. In practical application, MCU is usually used instead of CPU. It receives the control instructions of the system host, decodes and executes the actions required by the main control terminal. Therefore, on the one hand, the MCU in the code detector needs to connect the communication interface chips at TXD and MD to communicate with the system host, on the other hand, it needs to connect the relay or thyristor device at its I/O port through the level interface chip to output the control voltage required by the pan/tilt and the electric lens, or directly output the switching signal.

From the above analysis, it can be seen that on the one hand, the code detector needs a communication line to connect with the system host in the monitoring room, and on the other hand, it needs a multi-core control line to directly connect with the corresponding control voltage input terminals of the tripod head and the electric lens.