User`s guide

4 Operating the Power System
78 Series N6700 User’s Guide
Simultaneous Voltage and Current Measurements
Some models have simultaneous voltage and current measurement
capability (Refer to Chapter 1, “Model Differences”). In this case
BOTH voltage and current can be acquired on any measurement.
Front Panel: SCPI Command:
Not available. Select the measurement function:
SENS:FUNC:VOLT ON,(@1)
SENS:FUNC:CURR ON,(@1)
Initiate and trigger the measurement system:
INIT:ACQ (@1)
TRIG:ACQ (@1)
Fetch the voltage and current measurement:
FETC:VOLT? (@1)
FETC:CURR? (@1)
Agilent N6781A Auxiliary Voltage Measurements
The Agilent N6781A has an auxiliary voltage measurement input,
whose primary use is for battery voltage rundown measurements. It
may also be suitable for other applications including general purpose
DC voltage measurements between +/-20 VDC. The auxiliary voltage
measurement input is isolated from other commons. It has a
bandwidth of about 2 kHz. It has one input range: −20 to +20 VDC.
Auxiliary voltage measurements cannot be made along with output
voltage measurements. When the auxiliary voltage measurement
input is selected, the voltage measurement input will be switched to
the Aux Voltage inputs on the Agilent N6781A instead of the normal
+ and − sense terminals.
To enable auxiliary voltage measurements:
Front Panel: SCPI Command:
Select Measure\Input.
Select Auxiliary and press Select.
Select Main to reconnect the
voltage measurement input to
the output terminals.
To enable auxiliary measurements:
SENS:FUNC:VOLT:INP AUX,(@1)
Take the auxiliary voltage measurement:
MEAS:VOLT? (@1)
NOTE
When the auxiliary voltage measurement terminals are left unconnected, the
front panel meter will indicate a voltage reading of approximately 1.6V. This is a
normal indication which does not affect the voltage measurement once the
auxiliary measurement terminals are connected.