Radio over free space optics (Ro-FSO) technology provides a promising solution for future wireless network, offering high data transmission compared to RF technology. In this paper, performance of double sideband-suppressed carrier based Ro-FSO system under various weather conditions is investigated. It transmits two RF signals at 10 and 15 GHz over an optical wireless channel of 1 km. At transmitter Mach Zehnder modulator is used for both carrier suppression and signal modulation. At the receiver, delay interferometer is used for separation of RF signal having delay of 0.1ns. KeywordsRadio over free space optics (Ro-FSO), RoF, FSO, ODSB-SC, Wavelength interleaving (WI).