In your workbook enter the minimum and maximum values of the DC voltages and the corresponding values of output frequency in the boxes provided and copy the curve shown in Figure 91. As an alternative, if you have used a frequency meter, you could plot your results. switch off the power supply We will now consider what happens when we superimpose a sinusoidal information signal on a DC base bias voltage. Providing the amplitude of the sinusoidal signal is small, the result will be a sinusoidal change in the frequency of the oscillator. If the amplitude is too large, as shown in Figure 92 below, the portion of the curve used may no longer approximate to a straight line. This will result in the modulator's output no longer changing sinusoidally with a sinusoidal input. In other words, distortion has occurred