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Application Notes
In satellite development, power optimization is critical in every stage of the design process since it affects: equipment weight, equipment size, thermal management, power consumption, storage systems. Optimizing satellite subsystems for low-power operation requires the ability to accurately analyze dynamic power needs during each phase of development. This spans the beginning stages of the software design for FPGAs, microprocessors, ASICs, and so on, and extends to include the system design of modules and subassemblies. The major challenge is accurately characterizing the sharp transients and dynamic behavior of a design’s current profile. An averaged or integrated view of power demand is not sufficient. Instead, a meaningful characterization requires an accurate, high-resolution picture of the current profile—the highs, the lows and the transitions. As an example, the dynamic current demanded by a transmitter amplifier in a communications subsystem may shift from “sleep” to “transmit” levels in a matter of microseconds. The ideal instrument for this application has three key attributes. First, capturing such transitions requires a wide dynamic range that can seamlessly and accurately measure currents that range from less than 1 mA to more than 1.0 A.
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