I use Labview 6.1 and need to get the time domain representation of a signal from the outputs of the Amplitude and Phase Spectrum.vi which are: Ampl Spectrum Magn (Vrms), Ampl Spectrum Phase (radians) and df (Hertz). So, I did the following test. I generated a signal (swept-sine) then I got its frequency representation from the Amplitude and Phase Spectrum.vi. I tried to recover the waveform by the correct conversions of Vrms, radians to the input units of the Multitone Generetor.vi (V, degree, frequency array, # of samples and sample frequency), but I was unsuccessful. The wavefoms were slightly different and I don't understand why. Could you enlighten me?
