Agilent Technologies E3631-90002, User Manual, Page: 142 / 166

Chapter 7 Tutorial
Output Characteristics
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7
Output Characteristics
An ideal constant-voltage power supply would have a zero output impedance
at all frequencies. Thus, as shown in Figure 7-3, the voltage would remain
perfectly constant in spite of any changes in output current demanded by the
load.
Figure 7-3. Ideal Constant Voltage Figure 7-4. Ideal Constant Current
Power Supply Power Supply
The ideal constant-current power supply exhibits an infinite output
impedance at all frequencies. Thus as Figure 7-4 indicates, the ideal
constant-current power supply would accommodate a load resistance
change by altering its output voltage by just the amount necessary to
maintain its output current at a constant value.
Each of the three Agilent E3631A power supply outputs can operate in either
constant-voltage (CV) mode or constant-current (CC) mode. Under certain
fault conditions, the power supply can not operate in either CV or CC mode
and becomes unregulated.