Wireless module transmission is widely used in vehicle monitoring, telemetry, small wireless networks, wireless meter reading, access control systems, small wireless data terminals, security and fire prevention systems, wireless remote control systems, biological signal acquisition, hydrological and meteorological monitoring, robotics control, wireless data communication, digital audio, community call, industrial data acquisition systems, wireless labels, identification, non-contact RF in smart card, digital image transmission, etc. Fields.
After purchasing the module, should judge the performance of the module?
1, RF radio frequency module transmitter power
FM transmitter transmits the instantaneous frequency of the FM carrier is equal amplitude wave, its maximum power is equal to the average power; when the AM transmitter transmits the AM signal mAM = maximum transmit power is four times the average power. If the FM transmitter and the end of the FM transmitter with the same type of power tube, the average power of the FM transmitter according to the maximum power for the estimation of the average power of the FM transmitter is 4 times the FM transmitter.
2. Wireless module interference resistance
FM than AM system has a strong anti-interference ability, analyzed the two systems of the transmitter signal power. FM wave power in the separation of the FM wave side frequency component of the power. The larger the modulation coefficient mFM side frequency, not only the greater the number, but also the greater the amplitude, which means that the carrier power is converted into a larger proportion of side frequency power, while the side frequency power of the AM wave is only half of the carrier power. Therefore, FM wave has greater side-frequency power than AM wave, which means it is more capable of overcoming noise and interference in the channel or machine.
3. Communication distance of wireless module
In the corresponding actual project, the transmission distance of the wireless module is related to the antenna, receiving sensitivity, air rate, receiving environment, wireless voltage and battery capacity. By debugging the module several times, the required transmission distance of the project is achieved.
Ltd. specializes in high-precision GNSS modules and wireless communication products, technology development and application promotion service providers, relying on the wireless communication technology in the field of R & D and promotion of experience, JUNODA set up a team with a wealth of experience in hardware and software development technology, aimed at domestic and foreign OEM / ODM customers and system integrators to provide high-quality, high-performance wireless modules and applications! We aim to provide high-quality, high-performance wireless modules and application programs to OEM/ODM customers and system integrators at home and abroad, and create long-term value for customers!
The company mainly provides integrated antenna module, dual-frequency high-precision module, single-frequency high-precision module, thousand-seeking high-precision module, Zhongke micro-positioning module, U-BLOX positioning module, SICOM communication module, inertial navigation DR module, UWM GNSS module, RTK differential module, 4G communication module and high-precision antenna, etc., the products are sold well in Beijing, Shanghai, Shenzhen, Guangdong, Jiangsu, Zhejiang, Sichuan, Hunan and other parts of the country. Our GNSS modules are widely used in many application fields, such as drones, vehicle security monitoring and dispatching, automatic bus stop announcement, DVR, car DVD navigation, GPS electronic dog, synchronized timing, high-altitude balloon monitoring, engineering machinery, industrial automation, etc. In the field of wireless communication products, the company is closely involved in the field of wireless communication, such as RTK differential module, 4G communication module and high-precision antenna.
In the field of wireless communication products, the company follows the latest development of international communication technology, introduces and acts as an agent for wireless communication modules that meet the market demand, and the products have a comprehensive layout from 2G, 3G, 4G, and are widely used in financial electronic payment, vehicle remote control, remote advertising information, repeater monitoring, mobile Internet terminals, smart home, remote medical care, network testing, enterprise information management, anti-theft alarm, Remote video transmission, intelligent meter reading, mobile computing, network navigation, voice phone, wireless gateway and other fields. Focused areas include video surveillance, network optimization, routers, POS and other M2M industry applications.
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