22
Error Analysis
¥A.The absolute error of a measurement is the difference between the ideal value x theory of a quantity (the measurement predicted by theory) and the experimentally obtained value x measured .
¥
Cr Criteria of Accuracy:  The relative error is the error of each measurement divided by the theoretical value of that measurement.
For parts of the experiment where several measurements are taken at once (a power spectrum measurement on the spectrum analyzer), you should compare the error of each measurement against the maximum theoretical value in that set of measurements (generally the theoretical amplitude of the first harmonic).