The four plots in Section 6.1.3 show that the error vs PCB distance plots when varying the device gain or varying the FSR look the same as do the two error vs device spacing plots. In Figure 6-3 the FSR was fixed and looks almost identical to Figure 6-5 where the device gain variant was fixed. It is known that the gain of the A1 device variant is half of the gain of the A2 device variant. The shift from the lines between A2 and A1 in Figure 6-3 are identical to that of the shift of the lines from an FSR of 600 A to 300 A in Figure 6-5. When the FSR is halved, twice the gain is needed to get the same results. Therefore a halving of the FSR shows the same characteristics in the plot as a halving of the gain (choosing a lower device gain variant).