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In the road monitoring, wireless bridges are used to transmit video signals. In this case, the blocking in the city is usually more. We usually transmit the signals from the monitoring point to the nearby high roof, and then transfer the signal or The optical fiber is transmitted back to the monitoring center.
It is impossible to build a wireless monitoring system on the expressway directly to the monitoring center. Usually, a relay station is built within a certain range to relay the signal, and then the transit point transfers the signal to the monitoring center or transmits it through the optical fiber.
In reservoirs, forest fires, mining areas, parks and other places where trees are more obstructed, we try to find a relatively high location on the launch side, or find a transit tower nearby to relay signals.
Around the construction site or on the tower crane, the tower crane is generally not blocked by the office on the construction site. We can directly transmit the signal. If the monitoring points around it need to be blocked, then they need to be transferred, or they can use the tower crane to relay the signal.
How to design a specific wireless monitoring program, you can call Levin technology sales staff! 
Shenzhen Leian Technology Co., Ltd. 
Wireless monitoring equipment, wireless bridge where the most suitable installation
For any wireless monitoring device, the choice of equipment installation address is very important. The ideal environment for wireless monitoring equipment is no shielding between the transmitter and the receiver, so as to ensure the stable transmission of the video signal. The same is true for wireless bridges. When installing a wireless bridge, try to install the transmitting antenna and receiving antenna at the highest point between the monitoring point and the center room, and try to avoid obstructions. There may be a gap between the transmitter and the receiver, but the middle shield must not be higher than the highest point, and the shield cannot be closer to the transmitter and receiver, which is not conducive to signal transmission.