OD1402 - Lesson 1/Learning Event 1For more practice, compute the following voltages:Your answers should be 10, 2, 70, .3, and 6 volts, in that order. Remember that when the VOLTS/DIV switch setting is in millivolts,we must convert the millivolts to volts by dividing by 1000. MEASURING DC LEVELSTo measure the DC level of a waveform, the AC amplitude must bemeasured as before. The DC level will be measured by observing thevertical movement of the top or bottom of the waveform when youswitch the vertical coupling AC/GND/DC switch from the AC to the DCposition. (Refer to figure 12, on the next page.) In this figure,the AC signal is one volt. The VOLTS/DIV switch is set to .5 andthe AC/GND/DC switch is set to AC. The AC/GND/DC switch is thenset to the DC position. The waveform moves down three centimeters. Therefore, the DC level of the signal is 1.5 volts. Notice that adownward deflection is a negative DC level and an upward deflectionis a positive DC level. The time and frequency of a waveform is always measured along thehorizontal axis of the graduated scale on the face of the CRT. Therefore, we must calibrate the scope horizontally, just as wecalibrated the scope vertically before making voltage measurements.