Keysight E36731A Manuel D'instructions page 31

The heavy solid line illustrates the locus of possible operating points as a function of the load voltage. Note that in
CV mode, a current limit can be imposed. As shown by the horizontal portion of the line, the input voltage remains
regulated at its programmed setting as long as the input current remains within the current limit setting. A CV
(constant voltage) status flag indicates that the input current is within the limit settings.
When the input current reaches the current limit, the unit is no longer in constant voltage operation and the input
voltage is no longer held constant. Instead, the load unit will now regulate the input current at its current limit
setting. A CL (current limit) status flag is set to indicate that a current limit has been reached. If the input voltage
increases until it exceeds 110% of the rated input voltage, the overvoltage protection will trip and the load's input
will turn off
Voltage may be programmed in one of two overlapping ranges, a Low and a High range. The low range provides
better programming and measurement resolution at low voltage settings.
CP mode
In this mode, the load unit will regulate the power being drawn from the DUT according to the programmed
constant-power value.
The load unit regulates the input power by measuring the input voltage and current and adjusting the input power
based on data streamed from the measurement ADCs.
Power may be programmed in one of three overlapping ranges, a Low, Medium and a High power range. The low
range provides better programming and measurement resolution at low power settings. The load unit have a built-in
over-power protection function that will not let you exceed 110% of the power rating of the load module (the Max
Power Contour).
Keysight E36731A User's Guide 31