Figure 3. Effect of the reference voltage V4 offset on the SFR curves. Model parameters: R_m=0.06 W∙m, Bhd = 12.25’’, R_xo = 0.5 W∙m, L_xo = 6’’, R_t = 1-40-1 W∙m. Nomenclature: V4 and V4S are accurate and shifted (offset) reference voltages, respectively (track 1). The SFR curves calculated using shifted voltage V4S and accurate voltage V4 are shown in tracks 2 and 3, respectively.