Parker Compax3S025V2 Operating Instructions Manual

Also see for Compax3H050V4: Operating instructions Operating instructions Manual

Contents

Parker EME Setting up Compax3192-120101 N11 C3I11T11 November 2007 203Sine at 204HzΔf=8Hz / f0=204Hz = 25,5⋅Δf / frequency does not correspond to the frequencyresolution!The sine frequency has only minimally changed, due to which it does, however, nolonger match the frequency resolution (204Hz/8Hz=25,5) => leak effectTwo consequences are visible:The spectre is faded in the ranges at the right and at the left of the sinefrequency. In this range, an amplitude is displayed, even though thesefrequencies are not contained in the real signal. The height of the peak of the sine frequency is reduced, => it seems as if thesignal energy is leaking out and distributing over the spectre. This explains theterm leak effect.WindowingWith the aid of the windowing, leak effects can be avoided. There are manydifferent kinds of windowing, who do all have the same restrictions. windowing reduces the total energy of the analyzed signal, which results in areduced amplitude of all measured frequencies. Individual frequency peaks do not appear so sharp and narrow as withmeasurements without windowing.Sine at 200Hz and 204Hz with Hanning windowingf 0 =200Hz f 0 =204Hz