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6 Advanced Source, Measurement, and Control
The heavy solid line illustrates the locus of possible operating points as a function of the output load.
As shown by the horizontal portion of the line, the output voltage remains regulated at its
programmed setting as long as the load current remains within the positive or negative current limit
setting. A CV (constant voltage) status flag indicates that the output current is within the limit settings.
When the output current reaches either the positive or negative current limit, the unit no longer
operates in constant voltage mode and the output voltage is no longer held constant. Instead, the
power analyzer will now regulate the output current at its current limit setting. Either a LIM+ (positive
current limit), or LIM- (negative current limit) status flag is set to indicate that a current limit has been
reached.
As shown by the vertical portions of the load line, when the unit is sinking power, the output voltage
may continue to increase in the positive or negative direction as more current is forced into the unit.
When the output voltage exceeds either the positive or negative over-voltage setting, the output will
shut down, the output relays will open, and either the OV or OV- and the PROT status bits will be set.
Either the user-defined over-voltage setting or the local over-voltage function can trip the over-
voltage protection.
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Keysight N6705C User's Guide
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