Vehicle Video Recorder 4G Wireless Receiver Transmitter Technology

  2.4 G wireless data transmission is a professional automotive industry development in vehicle monitoring, remote control, telemetry, small wireless network, entrance guard system, pager, industrial data acquisition system, wireless label, identification, non-contact RF smart card, small wireless data terminals, security and fire prevention systems, wireless remote control system, meteorological and hydrological monitoring, biological signal acquisition, robot control , wireless 232 data communication, wireless 485/422 data communication, digital audio, digital image transmission and other fields. It can also be used for industrial data transmission, wireless remote control, wireless mouse, wireless keyboard, wireless electronic tag, remote control toys, 2.4G wireless loudspeaker, wireless microphone, wireless speaker and other automatic data acquisition system; Industrial wireless control; Water, gas, heat, electricity and other residential meters with wireless remote automatic meter reading.

  2.4G is a wireless technology, because its frequency band is between 2.400GHz and 2.4835GHz, so it is referred to as 2.4G wireless technology. 2.4G wireless technology is actually the receiving and transmitting module technology, 2.4G wireless module 2.4ghz RF Transceiver/receiver Module) works in the range of 2400m-2483M ISM channel around the world and realizes automatic frequency sweep function when starting up. It has a total of 50 working channels and can supply 50 users to work simultaneously on the same occasion. Users do not need to manually coordinate and configure channels. At the same time, various types of wireless modules within 50 meters, 150 meters and 600 meters can be selected according to the cost consideration. The receiver unit and the remote control unit have the function of 1 key automatic code, digital address coding, large capacity, avoid address repetition.

  Single-send single-receive products are relatively simple to use, power and signal will be transmitted, received signals will be output, pure hardware products one-way transmission, do not need the support of software programs can be completed transceiver function. 2.4G products are more complicated. The CPU in the chip needs the support of software programs, and the instruction of single chip microcomputer can complete the two-way transceiver function. Single-send single-receive products have low cost and are widely used, but there are serious unavoidable co-frequency interference. Generally, 2.4G products with frequency hopping function have dozens to more than 100 channels to avoid interference. However, the complex software program of 2.4G products also makes some engineers who do not understand single-chip microcomputer afraid. At the same time, the power consumption and cost of 2.4G products as well as the decline of wall penetration performance also affect the popularization and application of low-end products.