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A: The full English name of CEC is Consumer Electronic Control, which is a function of HDMI that enables users to command and control other CEC devices connected via HDMI. For example, when the user puts the DVD into the Blu-ray player, the TV will automatically turn on due to the notification of the CEC signal, and then the video channel will automatically switch to the channel connected to the player. When the user turns off the TV, the CEC signal will also notify the HDMI-connected devices to enter standby together, and it becomes a single remote to control all HDMI-connected devices, which can solve the trouble of users needing to use multiple remotes to control the corresponding devices .
Answer: "USB 1.0 1.5Mbps(192KB/s) Low-Speed
USB 1.1 12Mbps (1.5MB/s) Full-Speed (Full-Speed)
USB 2.0 480Mbps (60MB/s) High-Speed (High-Speed)
USB 3.0 (USB 3.1 Gen 1) 5Gbps (500MB/s) Super-Speed
USB 3.1 Gen 2 10Gbps(1280MB/s) Super-speed+
USB 3.2 Gen 2×2 20Gbps (up to 2G per second)
The theoretical maximum transfer rate of USB4.0 is 40Gbps"
Answer: USB1.1 version
Answer: "It is an asynchronous transmission standard interface formulated by the Electronic Industries Association (EIA). The electrical characteristics of the serial port: 1) The maximum distance of RS-232 serial communication is 50 feet; 2) RS232 can achieve bidirectional transmission, full Duplex communication; the 9-pin interface behind the desktop computer is the com port (serial port), which is widely used in industrial control data acquisition;"
RS485 is a serial interface standard. For long-distance transmission, differential transmission is adopted, and differential signals are transmitted, and its anti-interference ability is much stronger than that of RS232. RS-485 adopts half-duplex communication.
Answer: 24K, 44.1K, 48K, 192K
A: Dual output display refers to connecting two monitors at the same time and outputting images or sounds. It mainly solves the problem of constantly switching back and forth between different windows for complex work such as charts and debugging programs.
Answer: 1. Different output resolutions:
DP line 1.4 supports 4K, 60-240H, up to 8K, 60Hz; DP line 1.2 supports up to 4K, 60-100Hz.
2. Different bandwidth:
The maximum supported bandwidth of DP line 1.4 is 32.4gbps; the maximum supported bandwidth of DP line 1.2 is 21.6gbps.
3. Different technologies:
DP line 1.4 supports 10 bit image transmission and HDR dynamic image transmission, which can better reflect the visual effect of the real environment. Supports enabling G-SYNC and Freeync technology, which can solve the problem of tearing and breaking caused by high-frequency refresh. "
A: "Wi-Fi is a technology that allows electronic devices to connect to a wireless local area network (WLAN), usually using the 2.4G UHF or 5G SHF ISM radio frequency band.
802.11n 540Mbps 2.4G or 5G band
802.11ac 600Mbps 5G Band"
Answer: "North America FCC certification Korea KC certification Germany TUV certification EU CE certification China CCC certification"
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