The QM1004-0.5-18 1U 19-inch Rack 0.5-18 GHz Combined RF Upconverter and RF Downconverter from Quonset Microwave combines a single channel of RF upconversion combined with a single channel of RF downconversion with an RF frequency range of 0.5 to 18 GHz in a single unit. The IF is centered at 2.5 GHz with a 1000 MHz bandwidth (2000-3000 MHz). The LOs are externally applied and are common to both the upconversion and downconversion channel, requiring that both channels tune to the same frequency. Unit comes standard with Option 100, internal common LO's. Computer controlled common LOs are integrated into the QM1004-0.5-18.