4 Operating the Power System
80
Keysight N6700 User’s Guide
Seamless Measurements
Seamless voltage and current measurement autoranging is available on
Keysight Models N6781A, N6782A, N6785A, and N6786A. This enables a
wide dynamic measurement range with no data lost across ranges.
Autoranging does not include the 10
μ
A range, which must be selected
manually.
Front Panel:
SCPI Command:
Select Measure\Range.
Select Auto from the voltage
or current dropdown menu.
Then press Select.
To enable seamless voltage or current
autoranging on channel 1:
SENS:VOLT
:RANG:AUTO ON,
(@1)
SENS:CURR
:RANG:AUTO ON,
(@1)
Adjust the Measurement Sample Rate
The following figure illustrates the relationship between measurement
samples (or points), and the time interval between samples in a typical
measurement.
You can vary the measurement data sampling rate as follows:
Front Panel:
SCPI Command:
Select Measure\Sweep.
Enter the number of points and
press Select. Scroll to Time
Interval, enter a value and press
Select.
To set the time interval to 60µs*
with 4096 samples, use:
SENS:SWE:TINT 60E-6, (@1)
SENS:SWE:POIN 4096, (@1)
The maximum number of sample points that are available for all
measurements is 512 K points (K = 1024). If you specify a voltage
measurement with 500 K points on channel 1 for example, you will only
have 12 K points available for all other measurements.
Time interval values can range from 5.12 microseconds (for one
parameter on Models N678xA SMU) to 40,000 seconds. Note that the
shortest time interval (fastest speed) that can be specified depends on
the number of parameters that are being measured, the model that is
doing the measuring, and the time interval resolution.
5.12 microseconds:
10.24 microseconds:
20.48 microseconds:
20.48 microseconds:
1 parameter (models N678xA SMU only)
1 or 2 parameters (all models)
3 or 4 parameters (all models, with 20 µs resolution)
Up to 8 parameters (all models, with 40 µs resolution)
ACQUISITION TIME
(TIME INTERVAL X #SAMPLES - 1)
TIME INTERVAL BETWEEN SAMPLES
TRIGGER
OCCURS
MEASUREMENT
SAMPLE (POINT)
