Question: 1355 Spectrum Analyzer Calibration A certain spectrum analyzer measures the average power delivered to a calibrated resistor by the individual harmonics of periodic waveforms. The

13–55 Spectrum Analyzer Calibration A certain spectrum analyzer measures the average power delivered to a calibrated resistor by the individual harmonics of periodic waveforms. The calibration of the analyzer has been checked by applying a 1-MHz square wave and the following results reported:

f(MHz) 1 3 5 7 9 11 P(dBm) 12.1 2.56 -1.88 -4.80

The reported power in dBm is P= 10 logðPnÞ, where Pn is the average power delivered by the nth harmonic in mW. Is the spectrum analyzer correctly calibrated?

f(MHz) 1 3 5 7 9 11 P(dBm) 12.1 2.56 -1.88 -4.80 -6.98 -8.73

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