First, HDMI can not be hot plugged
One of the biggest advantages of the HDMI interface is its ease of use. As long as one line, audio and video can be transmitted. In normal use, the HDMI HD cable is plugged and unplugged after booting, and most of them do not pay attention to this detail. If it is plugged in or unplugged in the power-on state, it is easy to burn the HDMI interface chip. Therefore, when plugging in the HDMI cable, do not plug it hot. You must disconnect the projector and related connected devices before plugging it.
Second, carefully select different specifications of the HDMI interface
The widely used HDMI high-definition cable has three different sizes of interfaces. There are too many electronic products, and the parameters will naturally be different. Many of the interfaces are standard, but they have bought a mini type. In fact, this does not require buying more. One, as long as you use an adapter to solve it. When the computer graphics card is not an HDMI interface, but a DVI interface, Yuanyang Technology specializes in producing HDMI to DVI HD cable, which can be connected. The DVI connector adopts the standard DVI-D 24+1, which is highly versatile and can connect many numbers. Home appliances, with a standard length of 1.5 meters, can be used in many situations and avoid the entanglement of wires.
Third, the length of the HDMI high-definition line has strict requirements
Regardless of the use, you must choose 1/3 longer than the use case, which will ensure the normal data transmission of the wire. In the case of long-distance transmission, the requirements for HDMI cable are very strict. In addition to the thickness of the wire diameter, the factors that determine the quality of the HDMI cable are as follows:
1. Selection of raw materials. A good wire, the core wire is pure copper oxygen-free copper, and the low-cost cable is tin-plated.
2. Production process. The low-end production equipment used to manufacture wire rods is only tens of thousands of yuan, and the high-end equipment is up to one million yuan. The quality of the wire produced is also very different.
3. Shielding effect. The HDMI cable produced by low-end equipment has a shielding effect of only 70% to 80%, while the shielding efficiency of high-grade wires is over 97%.
Long-distance transmission, when transmitting 1080i or 720P signals, the difference is not big, but when transmitting 1080P signals, the requirements on the wires are very demanding. If the quality of the wires is not good, the screen jumps, the large erythema phenomenon, and the signal is no signal. .
Four, HDMI wiring, carefully buried in the wall
Many friends want to embed the HDMI cable in the wall in advance for the sake of future beauty and convenience. This must be done with caution. If you want to be clear, if the pre-embedded wires are lines 28 and 30, the transmission of 1080P and 4K programs will definitely encounter problems and endless troubles. At present, most people still lack the real 4K signal and can't test the quality of the wire, so HDMI wiring is carefully buried in the wall.
The above is the use of HDMI high-definition cable for the technical staff of Yuanyang Technology. When connecting the device, the TV will display no video signal. In this case, first check if the TV has only one HDMI interface. If yes, insert the HDMI cable into the seat, but be sure to insert the HDMI cable in the off state, and insert the HDMI connector into the HD player on the other end. After turning on the power, enter the TV menu, set the HDMI mode, and select the corresponding mode. That is, you can confirm playback.