First, the concept of matrix refers to the concept of linear algebra in high numbers, generally refers to multi-channel output selection in the case of multiple inputs, forming the matrix structure of the following figure, each output can be different from the input signal " "Short connection", each output can only be connected to a certain input, but one input can (at the same time) turn on different outputs.
Second, function
The function of the matrix switcher is that in the case of multi-channel signal input, multi-channel (including 1) signals can be selected and output independently to complete the signal selection.
At present, the main application is large screen splicing, video conferencing engineering, AV engineering, monitoring, BSV liquid crystal splicing, and so on need to use multi-channel audio and video signals in the alternate use of the project.
Third, the principle
Switching principle is to choose, there are many ways to choose, the simplest is to directly connect the signal line together, such as the terminal board, use the artificial output signal line jumped on the input signal line, but also to complete the selection, or use The key switch is turned on and off. Of course, this is a manual operation, a mechanical one, there are no technical issues such as indicators, and it is not discussed as a matrix switch. In the second method, the relay can also be used to complete the selection. The level control relay can be used to make the disconnection and connection between the output line and the input signal, and the signal can be selected. The third method is based on the circuit. The principle is to turn on and off using the on-off of the internal circuit of the chip, and the selection of the signal can be accomplished by controlling the level.
Relay mode and chip mode have their own advantages and disadvantages.
Relay mode:
If you do not consider the input matching and output drive circuit part, it is consistent with the wiring method is to connect and disconnect by physical contact, from this perspective, there is no indicator concept (up to a contact resistance and response Time), so the technical indicators are good and the price is low, the disadvantage is that the stability is poor, after all, by physical contact, the relay has a certain life span, in principle, there are 80,000 average failure-free operation and operating sound, due to the line The reason for board alignment is that it cannot be done on a larger scale.
Chip mode:
Because the circuit is switched on and off, the chip itself has technical specifications (in the case of input matching and output drive), so to ensure the technical indicators, we must choose a dedicated switching chip, so the price is higher, but the stability Well, the matrix that can be formed is larger.
Fourth, matrix switcher should ensure that the technical indicators
Matrix switchers require different technical specifications depending on the application field. Taking the broadcasting and TV industry as an example, in order to guarantee the terminal's display quality, the broadcasting and television industry has performed the entire signal transmission process, from the camera to the television, to perform technical index allocation, and to switch and allocate the analog matrix.
Courtyard lights without solar power, just connect with the grid,suitable too for parks and landscape lighting. Their bright LED lights have a long, reliable life and can be easily installed in any location.They are inexpensive and available in a wide variety of colors and designs.can be customized by the height of the pole and the modeling.usually we made 3-3.5 meters high pole,with LED light lamps.we produce various kind of courtyard lights just as you customized.
Courtyard Light AC,Yard Lights AC,Garden Lights AC
Yangzhou Beyond Solar Energy Co.,Ltd. , https://www.ckbsolar.com