Abstract: A method of estimating the torque of an axle of a running motor, comprising receiving data indicative of the total electrical active power, P, supplied to the motor, determining the electromechanical power, Pem, supplied to the axle using the data indicative of the total electrical active power, P, receiving data indicative of a rotor speed, nr, or rotor frequency, fr, of the axle, determining an angular rotor frequency, ?r, of the axle using the data indicative of rotor speed, nr, or rotor frequency, fr, of the axle, and determining electromechanical axle torque, Tem, using the determined electromechanical power, Pem, and the determined angular rotor frequency, ?r.

Abstract: A method of classifying a signal waveform under test for appropriate numerical measurement includes acquiring waveform data indicative of the signal waveform under test, analyzing the waveform data, determining a signal waveform type from the analyzed waveform data, and activating an appropriate numerical measurement of the signal waveform under test based upon the determined signal waveform type. There is also provided a test and measurement instrument configured to carry out any of the disclosed methods.