What are the two types of wireless microwave transmission classification?

Waves refer to electromagnetic waves whose frequency exceeds 1 GHz. Wavelengths range from millimeters to centimeters, and their wavelengths are shorter than ordinary radio waves. Wireless microwave transmission is similar to linear transmission of light and is a relay transmission in the range of sight distance. With the characteristics of line transmission and multi-path transmission in the line-of-sight range, wireless microwave transmission is divided into: analog microwave transmission and digital microwave transmission.

Wireless microwave transmission is divided into: analog microwave transmission and digital microwave transmission.

Analog microwave transmission

Analog microwave transmission is to directly modulate the video signal on the microwave channel (microwave transmitter, HD-630) and transmit it through the antenna (HD-1300LXB). The monitoring center receives the microwave signal through the antenna and then passes through the microwave receiver (Microsat 600AM) demodulate the original video signal. If you need to control the PTZ lens, add the corresponding command control transmitter (HD-2050) in the monitoring center and configure the corresponding command receiver (HD-2060) on the monitoring front end. This monitoring method is very clear and there is no delay. There is no compression loss, the cost is cheap, the construction is easy to install and debug, not suitable for general monitoring points, and it needs to be used when there are not many relays.

Digital microwave transmission

Digital microwave transmission is to first encode the video (HD-6301D), and then through the digital microwave (HD-9500) channel modulation, and then transmitted through the antenna, the receiver is the opposite, the antenna receives the signal, microwave despreading, video decompression, Zui restore the analog video signal, but also after microwave despreading through the computer to install the appropriate decoding software, using computer software to extract the video, and the computer also supports video, playback, management, cloud mirror control, alarm control and other functions; this monitoring There are 720*576 and 352*288 resolution options. The former is more expensive and the video has a delay of about 0.2-0.8 seconds. The cost varies greatly depending on the actual situation, but there are also some advantages that are not comparable to analog microwaves. There are many monitoring points, the environment is more complex, there are many cases where relaying is needed, the monitoring points are more concentrated, it can concentrate on transmitting multiple video, the anti-jamming capability is better than the simulation, etc... The advantages are more suitable for monitoring points. It is necessary to use relay when there are many.