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Level Error Calculation for Spectrum Analyzers

Level or power measurement of especially modulated signals using spectrum analyzers is becoming more and more important . Whereas the first choice in terms of accuracy for power measurement of any carrier (modulated or non-modulated) is a power meter, power measurement of spurious or in the adjacent channel of a transmission system needs a selective power meter with high dynamic range. A power meter, however, is a non-selective device
with limited dynamic range and is not appropriate for these types of measurements.
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Rohde & Schwarz
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