Princeton Microwave Technology provides customers with the highest quality product, with leading surface mount technology. PmT products are integrated into communications networks digital microwave radios, and both commercial and military radar, surveillance receivers and test equipment. The phase locked oscillators utilize ceramic coaxial resonator and ceramic dielectric resonator fundamental frequency sources with low phase noise performance. The design of the Phase Locked Oscillators is based on sampling phase detector technology, which provides the comparison frequency at the same frequency as the fundamental frequency output. This method provides the best phase noise performance for any analog phase locked oscillator. Oscillators are available with highly stable external reference frequency oscillator or with internal reference oscillator. For sampling phase locked oscillators the reference frequency is a direct multiple of the output frequency. The phase noise within the loop bandwidth is the degraded phase noise of the reference source.