Profile: Spectrum Control Inc. specializes in offering RF & microwave components and systems. Our RF components include amplifiers, VCO's, switches, attenuators, mixers, lighting amplifiers, detectors and DRO's. Limiting amplifiers are useful for protecting subsequent components from input overdrive and removing amplitude modulation from FM signals. Digitally tuned oscillators (DTO) are custom designed assemblies that consist of a select number of sub-band VCOs covering customer specific frequency ranges between 2GHz and 18GHz. The sub-band RF outputs are selectively switched to a common RF output port. Sufficient sub-band overlap insures full band coverage. Digital tuning is via a 16 bit, parallel input word. Several bits are used for selecting the desired sub-band and 12 to 14 bits are used for frequency tuning. Silicon semiconductors are used to provide the possible phase noise and post tuning drift performance.