N
T
is the total number of paralleled units of any rating
N
2kW
is the total number of paralleled 2 kW units
*If there are no 2kW units used, then N
2kW
= 0.
Note that in a mixed power configuration, you must set the current limit of the 2 kW units to twice the
value of the 1 kW units. This is because in a mixed power configuration, each 2kW unit will contribute
twice as much current as each 1kW unit.
When the current limit setting of any paralleled unit is reached, the output current of that unit will limit
at its specified setting.
In current priority mode:
l Set the voltage limit of each paralleled unit to the same value.
l Program the current setting of each paralleled unit according to the equations above if current
sharing is desired. The total output current will be the sum of all the individual current settings.
Note that in current priority mode, the sharing configuration will balance the currents only if all of the
units are operating in voltage limit mode, with the VL+ status annunciator on.
Program a Step Function for Additional Output Changes
Refer to Programming a Step Transient for details. Connect the Trigger signal to the paralleled units
as shown in the previous figure. Then enable the transient Step function.
Front Panel Menu Reference SCPI Command
Select Transient\Mode
Select Voltage Mode or Current Mode.
In the dropdown list select Step.
To enable Voltage transient mode:
VOLT:MODE STEP
To enable Current transient mode:
CURR:MODE STEP
In Voltage priority mode, the current transient must remain set to Fixed. In Current priority mode, the
voltage transient must remain set to Fixed.
For , you can also program output changes using the List
Transient and Arbitrary Waveform functions. Refer to Programming a List Transient
and Programming an Arbitrary Waveform for details.
Program the Step Values and Specify the Trigger Out Signal Source
In voltage priority mode:
l Program the output voltage step of each paralleled unit to the same value.
In current priority mode:
l Program the current step of each paralleled unit according to the previous equations. The total
output current will be the sum of all the individual current settings.
4 Using the Advanced Power System
170 Keysight N6900/N7900 Series Operating and Service Guide
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