FM transmitter: Firstly, the audio signal and the high-frequency carrier are modulated into a frequency-modulated wave, so that the frequency of the high-frequency carrier changes with the audio signal, and then the generated high-frequency signal is amplified, excited, power amplifier and a series of impedance matching, A device that outputs a signal to an antenna and sends it out. The generation of high-frequency signals now has a frequency synthesis, PLL, etc. At present, the frequency range of commercial FM broadcasting in China is 88-108MHZ, the campus is 76-87MHZ, and the western country is 70-90MHZ. Original Bulb Lamp With Housing The original projector bulb lamp with housing is installed with the original brand factory projection lamp, providing bright and clear pictures, visual appreciation, high quality and worry-free service. It can be directly put into the projector, the installation is simple, and no reassembly is required. Original Bulb Lamp With Housing,Buy Projector Lamp,Projector Lamp Light,Original Projector Shenzhen Happybate Trading Co.,LTD , https://www.szhappybateprojector.com