8 - Manual setup
Source shape
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SMU4000 Series Instruction Manual
Pulsed Sweep
A pulsed sweep works in a similar way to a sweep- it provides a swept source level in steps
between defined start and end levels. However, after each sweep level is complete the level
returns to a user defined steady level.
One problem when testing a device using a standard sweep is that during the sweep the
temperature of the device under test can change due to the applied source. Pulsed sweep helps
to alleviate this issue by returning to a defined steady level after each sweep step so that the
DUT can return to its resting temperature.
Settings
The Pulsed Sweep setup options are as follows:
The step size is updated when the sweep settings are changed.
Linear / Logarithmic
Step size =(stop-start) / (points -1)
Dual linear / Dual logarithmic
Selecting Dual linear or logarithmic shape provides a swept source level in steps between
defined start and end levels, and back to the start level.
NOTE
The number of points in a dual sweep refers to the total number of points-from the start to the end and
back to the start. When using a dual sweep, the total number of points must be an even number>=4 for
dual, >=2 for single.
Steady Level
Additional options available with a pulsed sweep are a settable steady level and the option to
filter the steady measurements.
In most situations there is very little use for the pulse sweep steady level results, as such the
filter steady measurements option allows for the steady level measurements to be filtered out
and discarded from the results buffer.