Agilent Technologies N8900 series Operating Manual page 65

Analog Programming
Output current and voltage control using external potentiometers
Output current and voltage measurements
Output status monitoring
64
Analog remote control of the output can be accomplished by
connecting external potentiometers to the VPROG and
IPROG pins as shown. This is similar to the function of the
front panel voltage and current knobs.
The potentiometers must be rated at 10 kΩ. Connect the
VREF pin to one end of the potentiometers. Connect the
wipers to the VPROG and IPROG pins.
Note: Using a 5 V VREF halves the effective resolution of the
potentiometers as compared to using a 10 V VREF.
Output current and voltage values can be monitored and
read by connecting a standard multimeter to the VMON and
IMON pins as shown.
Depending on the reference voltage selection, a voltage read-
ing from 0 to + 5 V or 0 to + 10 V corresponds to the zero to
full-scale voltage or current output of the power supply.
The output monitoring pins are always available. You do not
need to enable the analog interface to be able to read the out-
put voltage and current.
OT, OVP, and CV status can be monitored by connecting a
standard multimeter to the appropriate status pins as
shown.
For OT and OVP, a reading >4V indicates the status condition
is true. A reading <1V indicates the status is false. For CV, a
reading >4V indicates a CV status condition.
The status monitoring pins are always available. You do not
need to enable the analog interface to be able to monitor the
output status.
Agilent N8900 Series Operating and Service Guide