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 \(1-\mathrm{MHz}\) square wave and the following results reported:

The reported power in \(\mathrm{dBm}\) is \(P=10 \log \left(P_{\mathrm{n}}ight)\), where \(P_{\mathrm{n}}\) is the average power delivered by the \(n\)th harmonic in \(\mathrm{mW}\). Is the spectrum analyzer correctly calibrated?

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