OPTICAL TO MICROWAVE CONVERTER USING DIRECT MODULATION

摘要

A point-to-point microwave radio link that operates in a Frequency Division Duplex (FDD) mode using direct digital modulation (25). The direct digital modulation (25) may be Frequency Shift Keyed (FSK), On-Off Keyed (OOK), or Phase Shift Keyed (PSK). The transmit signal is generated by a circuit that uses a Voltage-Control Oscillator (VCO) operating in a microwave radio band to obtain the modulated signal. The output of the VCO is then frequency multiplied by the predetermined factor to produce the modulated microwave output signal directly on the desired microwave band.