Each test signal or range has three parameters: source voltage Vs, resistance Rs and source frequency Fs. When using ASA for troubleshooting, the objective is to select the range that will display the most descriptive Tracker signature information. The Tracker 2800 can readily accomplish this by changing the proper range parameter. The source voltage Vs of the test signal can be used to enhance or disregard semiconductor switching and avalanche characteristics. The Fs or frequency of the test signal source can be used to enhance or disregard the reactive factor (capacitance or inductance) of a component or circuit node.