We developed a 10 GHz feedback oscillator with ultra-low phase noise. The oscillator was constructed to operate as the pump for the parametric transducers of the Mario Schenberg gravitational wave detector. We calculated the performance of the detector with this pump oscillator and determined how much improvement in phase noise would be necessary in order to reach the standard quantum limit in sensitivity.

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Abstract-The latency effect in long-distance gigabit links and networks may lead to some transmission penalties, as here discussed and illustrated through various examples. When transcontinental or overseas connections are considered, these penalties may become remarkably severe. By evaluating and discussing realistic cases, some countermeasures are suggested. These last may include an important conceptual change in several well-established protocols and a substantial increase in the data packet sizes together with some other modifications concerning the physical layer management.Resumo -0 efeito de latencia em enlaces e redes de alta velocidade e longa distancia podem levar a algumas penalidades de transmissao, como e aqui discutido e ilustrado por meio de varios exemplos. Quando conex6es transcontinentais sao consideradas, estas penas podem se tamar particularmente severas. Pela avalia<;ao e discussao de casos realfsticos, algumas medidas preventivas sao sugeridas. Estas medidas podem incluir uma importante altera<;ao conceitual em varios protocolos bern estabelecidos e urn aumento substancial nos comprimentos de pacotes, assim como algumas modifica<;6es relativas ao gerenciamento de camada ffsica.