Effects of the temporal resolution on the modulation of observable quantities. We take the base model − 193, fix the pixel size resolution to 0R and consider cadences of “0s” (=0.15 s, solid curve), “1s” (=1 s) ≃P/5 (dotted curve), and “2s” (=2 s) ≃ 3P/7 (dashed curve), where P ≃ 4.5 s is the period of the mode. The upper panel shows the temporal evolution of the normalised integrated intensity along the line-of-sight for ray 2 taking a viewing angle of 0°. The rest of the panels, respectively from top to bottom, show the temporal evolution of the Doppler velocity, the line width and (logarithm of) the χ² non-Gaussianity parameter resulting from Gaussian fits to the specific intensity profile I_λ(t) for the different temporal resolutions. In order to show best the effects on the Doppler velocity, only for this quantity we take the case of ray 1 with a viewing angle of 45°. The normalisation factor for the line width is the initial value at time t = 0 for the 0s temporal resolution. That of the χ² parameter is the time average value of the profile for ray 1 for 0s temporal resolution.