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Telemetry transmitter frequency stability evaluation

机译:遥测发射机频率稳定性评估

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All satellite telemetry transmitters use quartz crystals to synthesize their downlink frequency. Higher downlink frequency designs have evolved from lower frequency designs. Design techniques typically simply increase the crystal frequency multiplier, therefore crystal frequency instability is magnified in higher frequency designs. At some point, the transmit frequency stability will start to degrade the telemetry reception performance. This paper describes the search for appropriate measurements, metrics, impact assessment, and simulation to characterize and screen for acceptable performance.
机译:所有卫星遥测发射机都使用石英晶体来合成其下行链路频率。较高的下行链路频率设计已从较低的频率设计演变而来。设计技术通常会简单地增加晶体倍频,因此在更高频率的设计中晶体频率的不稳定性会被放大。在某个时候,发射频率的稳定性将开始降低遥测接收性能。本文描述了对适当的度量,度量,影响评估和仿真的搜索,以表征和筛选可接受的性能。

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