-SCS Parameter Analyzer Reference Manual Section 6:
4200A-901-01 Rev. C / February 2017 6-41
Power On Delay
When a test is run, the SMUs power on in a specific sequence. You can change the amount of time
between when the SMUs power on in the sequence.
The first SMU in the sequence always powers on immediately. Subsequent SMUs power on in
sequence after the delay.
For example, assume there are three SMUs in a test and the power-on sequence is SMU1, SMU2,
and SMU3. The power-on delay for SMU1 is set to 50 ms and the delay for SMU2 is set to 100 ms.
When the test is started, the power-on sequence for the SMUs is:
1. SMU1 powers on.
2. 50 ms delay.
3. SMU2 powers on.
4. 100 ms delay.
5. SMU3 powers on.
You can set the delay from 0 to 1.0 s.
For information on changing the sequence, refer to SMU Power On Sequence (on page 6-87
).
Pulse Mode
Pulse Mode allows you to apply voltage or current to a device for brief periods at widely spaced
intervals. This avoids device overheating in some tests. Pulse Mode is only available if the source
range and measure ranges are set to a fixed range or the Best Fixed range. Select this option to
enable Pulse Mode.
When Pulse Mode is selected, you can set the pulse on and off times and the pulse base voltage or
current. The pulse output goes to the specified voltage or current level when the pulse is on. When
the pulse is off, the pulse output returns to the specified base voltage or base current level.
The pulse on and off times determine the pulse period and pulse width as follows:
Pulse period = On Time + Off Time + cumulative measure time (if set to measure)
Pulse width = On Time
Pulse on and off times can be set from 5 ms to 20 s. The base voltage (or current) that can be set is
dependent the present source range.
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