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4 Operating the Power System
52 Series N6700 User’s Guide
Making Measurements
Each output channel has its own measurement capability. The output
voltage and current is measured by acquiring a number of samples at
the selected time interval, applying a window function to the
samples, and
averaging the samples.
The power-on and *RST time interval and number of samples settings
yield a measurement time of 21 milliseconds per reading (1024 data
points at 20.48
µ
s intervals). The output windowing function is
Rectangular. Use the following commands to make a measurement:
Front Panel: SCPI Command:
Select the Meter key. To measure the average output
voltage or current, use:
MEAS:VOLT?(@1:4)
MEAS:CURR?(@1:4)
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 are acquired on any measurement,
regardless of the parameter that is being measured. To return both
values of a simultaneous measurement:
Front Panel: SCPI Command:
Not available. First, measure the output voltage (or
current):
MEAS:VOLT?(@1:4)
Then Fetch the other parameter:
FETC:CURR?(@1:4)
Measurement Ranges
Some models have two voltage and current measurement ranges.
(Refer to Chapter 1, “Model Differences”). Selecting a lower
measurement range provides greater measurement accuracy,
provided that the measurement does not exceed the range.
Front Panel: SCPI Command:
Select Measure\Range .
Select the desired voltage or
current range and press Select.
SENS:CURR:RANG 0.1, (@1)
SENS:VOLT:RANG 5, (@1)
The maximum current that can be measured is the maximum rating
of the range. Two examples of programming measurement ranges are:
0.1 A range To select, program values ≤ 0.1A.
3 A range To select, program values > 0.1A and ≤ 3A.