Symmetricom, Inc.'s 9900 series of hybrid space crystal oscillators are comprised of simple clock oscillators (XO), voltage controlled crystal oscillators (VXCO) and higher performance temperature compensated crystal oscillators (TCXO). Based on proven designs and manufacturing techniques for high reliability in numerous space applications, the hybrid oscillators provide high performance and a wide range of output frequency with exceptional stability in a ruggedized, low power, light weight package.

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The 9900 series,  comprising models 9920, 9940 and 9960, provide the following features:

• 10 MHz to 1.2 GHz Output Frequency
• Mil-prf-38534 Class H or K Certified
• Fixed Frequency and Voltage Controlled
• Sine Wave, PECL outputs
• Low Aging and Phase Noise
• Optimized Phase Noise
• Radiation Hardened
• Environmentally Robust

It utilizes 3rd or 5th overtone AT cut crystals in a Colpitts configuration with optional multiplication circuitry and output amplifier or driver stages. The precision crystals are contained within hermetic or vacuum-sealed packages housed within the hybrid circuit package, resulting in the lowest end of life frequency drift possible. Output type and package are available in industry standard configurations to meet standard and custom applications. The hybrids are manufactured in a Mil-PRF-38534 class K facility that provides for the maximum reliability.