Keysight Technologies N6700C Serie Guide D'utilisation page 169

4 Operating the Power System
Current Priority Mode
In current priority mode, the output current should be programmed to the desired positive or negative
value. A positive voltage limit value should also be set. The voltage limit should always be set higher
than the actual output voltage requirement of the external load. With tracking enabled, the negative
voltage limit tracks the positive voltage limit setting. With tracking disabled, you can set different
values for the positive and negative voltage limits.
The following figure shows the current priority operating locus of the power modules. The area in the
white quadrants shows the output as a source (sourcing power). The area in the shaded quadrants
shows the output as a load (sinking power).
The heavy solid line illustrates the locus of possible operating points as a function of the output load.
As shown by the vertical portion of the line, the output current remains regulated at its programmed
setting as long as the output voltage remains within the positive or negative voltage limit setting. A CC
(constant current) status flag indicates when the output voltage is within the limit settings.
If the output voltage reaches either the positive or negative voltage limit, the unit no longer operates
in constant current mode and the output current is no longer held constant. Instead, the power
system will now regulate the output voltage at its voltage limit setting. Either a LIM+ (positive voltage
limit) or LIM- (negative voltage limit) status flag is set to indicate that either the positive or negative
voltage limit has been reached.
168 Keysight N6700C Series User's Guide