Prepare the following tools. There are the following hardware tools: 1, digital multimeter: this is used to measure voltage and repair power board. 2, hot air welding: mainly used to take memory chips, convenient brick repair machine. 3. Constant temperature soldering iron: used for welding. 4. Low-voltage power supply: used to directly supply power to special machines. Beginners don't need 5. Tweezers: used to take chips. 6. Art knife: used to repair lines and handle solder joints. 7. Small TV: used for signal modulation and test receiver. 8. Coaxial cable: used to transmit satellite signals. 9, a computer: used to brush the machine. Software tools are: modifier

Digital video conversion box (STB), usually called set-top box or set-top box, is a device that connects TV sets with external signal sources. It can convert the compressed digital signal into TV content and display it on TV. Signals can come from cables, satellite antennas, broadband networks and terrestrial broadcasts. In addition to images and sounds that can be provided by analog TV, the set-top box also receives digital content, including electronic program guides, Internet pages, subtitles, etc. Users can watch digital TV programs on existing TV sets and conduct interactive digital entertainment, education and business activities through the network.

The basic function of digital set-top box is to receive digital TV.

Digital set-top box

( 1) EPG。 Provide users with an easy-to-use and user-friendly way to quickly access the programs and TV programs they want to watch.

(2) High-speed data broadcasting. Can provide users with stock market information, ticketing information, e-newspapers, popular websites and other news.

(3) Software online upgrade. Online software upgrade can be regarded as one of the applications of data broadcasting. The data broadcasting server broadcasts the upgraded software according to the DVB data broadcasting standard, and the set-top box can identify the version number of the software, receive the software when the version is different, and update the software stored in the memory.

(4) Internet access and e-mail. The digital set-top box can conveniently realize the function of surfing the Internet through the built-in cable modem. Users can surf the Internet and send emails through the built-in browser of the set-top box. At the same time, the set-top box can also provide various interfaces to connect with the PC and connect with the Internet with the PC.

(5) Conditional acceptance. The core of conditional access is scrambling and encryption of set-top box, and digital set-top box should have descrambling and decryption functions.

The functions of the new generation set-top box should include: ① receiving analog TV and digital TV programs by broadcasting, ② accessing the Internet at high speed, sending and receiving emails, ③ VOD and music on demand, ④ telephone, videophone and conference TV, ⑤ connecting consumer electronic products such as VCR and VCD, ⑤ electronic shopping, ⑤ electronic games, etc.