Frequency Electronics designs, develops and manufactures high-technology frequency, timing and synchronization products for satellite and terrestrial voice, video and data telecommunications. The company s products include Quartz, Rubidium and Cesium Atomic frequency and time sources, radio frequency and microwave receiver, transmitter and transponder systems, specialized direct current-to-direct current power converters, and wireless communications sub-systems. The firm manufactures Rubidium Atomic Standard, a small, stable atomic clock and temperature-stable quartz crystal oscillators that are used in advanced cellular communications base stations. Its subsidiary, Gillam-FEI provides network monitoring and wireline synchronization products for a variety of industries and telecommunications providers in Europe, Africa, Latin America, the Middle East and Asia. Frequency Electronics is headquartered in Uniondale, N.Y.