High Sensitivity Wireless Data Modem Using FSK with RS232 , RS485 , TTL Interface

5W 16 Channels Programmable Radio Modem FC-302 with RS232 for Data Collection Abstract FC-302 is a synthesized 5-watt FM Radio Modem, which is designed for data transportation and voice communication. For the voice communication, it can support selected pre-emphasis, squelch and audio amplifier. The radio is PLL(Phase Lock Loop Synthesizer) /microprocessor controlled with optional FSK, GMSK, 4FSK modem. The application of two-point modulation with good low-frequency response