The horizontal axis is divided up by small graticule lines similar to those on a conventional oscilloscope CRT. Each mark is approximately 1/4 of the peak range voltage. For example, in the 10 V range, each division is approximately 2.5 V. You can use these graticule marks to get a rough estimate of the voltage drop across the component under test. Changing the Vs of the test range effectively acts the same as changing the Volts-per-division on an oscilloscope. Table 2-3 shows the volts per division for each Tracker voltage range.