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Model N6705 User's Guide
To enable seamless voltage or current autoranging on channel 1:
SENS:VOLR: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.
TRIGGER
OCCURS
TIME INTERVAL BETWEEN SAMPLES
You can vary the measurement data sampling rate using the following
commands. For example, to set the time interval to 60 microseconds
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:
Time interval values from 10.24 up to 20.48 microseconds are
rounded to the nearest 10.24-microsecond increment. Values above
20.48 microseconds are rounded to the nearest 20.48-microsecond
increment when the resolution is set to RES20. Values above 20.48
microseconds are rounded to the nearest 40.96-microsecond
increment when the resolution is set to RES40.
You can change the time interval resolution as follows:
SENS:SWE:TINT:RES RES20, (@1)
SENS:SWE:POIN:RES RES40, (@1)
Advanced Source and Measurement Functions 6
MEASUREMENT
SAMPLE (POINT)
ACQUISITION TIME
(TIME INTERVAL X #SAMPLES - 1)
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)
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