DS_Simp.NoDelay   In this variation the time delay between the two LGN populations in the standard DS_Simp model is removed by setting tdelay in the LGN and LGN_D populations to be the same. In all other respects, the two models are identical. This is to demonstrate how disrupting the relative timing of inputs in a linear DS model eliminates the stimulus dependence of correlation seen with sinusoidal gratings.