Agilent Technologies N8900 series Operating Manual page 64

Program the Analog Functions
Equipment Damage The digital and analog ground pins are internally connected to the USB and
GPIB grounds.Only connect these pins to external circuitry that is either at earth ground potential
or, to avoid ground loops, float the connections.
Output Off control
The INHIBIT input (pin 13) can be used in analog control to switch
the output off (and on). It is recommended that a low resistance
contact such as a switch, relay or transistor is used to switch the
pin to digital ground (DGND).
Output current and voltage control using a voltage source
Agilent N8900 Series Operating and Service Guide
Analog control of the output voltage and current can be
accomplished by connecting positive voltage sources to the
VPROG and IPROG pins as shown.
Depending on the reference voltage selection, a voltage
source variable from 0 to + 5 V or 0 to + 10 V produces an
output current or output voltage setting that is proportional
to the zero to full-scale rating of the power supply.
Note: Using a 0 to 5 V voltage source halves the effective res-
olution compared to using a 0 to 10 V voltage source.
Analog Programming
63