Figure 2 illustrates the I-V characteristic of such a supply. Assume that one connects a resistive load to the power supply as shown in Figure 3. The power supply operates thus in the CV mode as shown in Figure 3. However, if one decreases the resistance such that the current exceeds the maximum allowable value I s , the current will be limited to I s and the power supply operates in the CC mode . Figure 4 shows the front panel of the HP E3631A power supply.
Italicized print indicates the switch functions.
The shaded switches will not be used in this write-up. These switches control the more advanced features built into the equipment. Consult the User's Manual for more information. Figure 5 illustrates this view of the power supply. Simplified view of the triple output power supply Figure 6 shows a few examples of how the power supply can be connected.