User`s guide

Operation and Connections Tutorial 5
Model N6705A User’s Guide 99
You can specify if the Start of the delay is initiated only by a settings
change in voltage, current, or output state, or by any transition such
as an output load change that causes the unit to cross into CC mode.
Factors that influence how long the settings change or output load
change may last include: difference between old output value and
new output value, current or voltage limit, and output load
capacitance (in CV mode) or output inductance (in CC mode). The
delay required must be determined empirically; the programming-
response times in Appendix A may be used as guidelines.
Current Sinking
As shown by the dashed line on the left in the figures, the DC Power
Analyzer is capable of sinking current over the output voltage range
from zero volts to the rated voltage. This negative current sinking
capability provides fast downprogramming of the output. It can also
be used to sink current from a battery charger, thus providing battery
charger test capability. The negative current is not programmable.
Autoranging Boundary
The following figure illustrates the autoranging output characteristic
of the Agilent N675xA and N676xA DC Power Modules. This shows a
situation in which the voltage and current settings are high enough
that the operating locus is limited by the maximum output power
boundary of the output (operating point 3). Depending on the power
module, this may be greater than the output power rating of the
module. In this situation, the output is not guaranteed to meet its
operating specifications because it is operating in an area that is
outside its specified power rating.
Voltage
Current
Iset
Vset
CC
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C
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0
1
2
3
Less load resistance
More load
resistance
Vmax
Imax
Downprogrammer
characteristic