Keithley 4200-SCS Reference Manual page 233

Model 4200-SCS Reference Manual
NOTE
4200-901-01 Rev. S / May 2017
- For example: If Start = 0A, Stop = 0.005 A, and Step = 0.0006 A:
• Data Points value = integer of [1 + (0.005 - 0)/(0.0006)] = integer of [9.333] = 9
• Nine values are forced: 0, 0.0006 A, 0.0012A, 0. 0018A,... 0.0042A, 0.0048A.
- KITE never steps the force current beyond the value specified by the Stop parameter,
even if you specify a Step value that is larger than the Stop value.
• Step (Log sweep case): If Sweep Type is set to Log, the Step edit box is grayed and read-
only. The value in the Step box (zero) has no significance, because the logarithmically
calculated step sizes implemented by KITE are nonuniform (refer to
Current and Voltage
• Data Points (Linear sweep case): The Data Points value specifies the number of data
points that are generated when a sweep is executed. If Sweep Type is set to Linear, the
Data Points value is calculated by KITE and is read-only. Refer to the above description of
the Step parameter.
- Data Points value = integer of [1 + (Stop value - Start value)/(Step value)]
• Data Points (Log sweep case): The Data Points value specifies the number of data points
that are generated when a sweep is executed. If Sweep Type is set to Log, a Data Points
value between 1 and 4095 may be entered. For information about how KITE uses the Data
Points value to calculate step size, refer to
• Src Range: The Src Range (source range) combo box specifies the SMU current range
used to force the sweep current, per the following options:
- The Auto option commands the SMU to automatically optimize the current range as the
sweep progresses. This option provides the best current resolution and control when
sweeping several decades. However, the range change time delays limit the sweep
speed.
- The Best Fixed option commands the SMU to automatically select the single current
range that best fits the entire sweep.
- The numerical current range options allow you to manually select an SMU range to suit
your needs. This range must accommodate the Stop or Start value, whichever is greater.
• Compliance: The Compliance parameter edit box specifies a valid SMU voltage
compliance for the sweep, the units for which are selected through the combo box at the
right of the edit box.
• Dual Sweep: The SMUs in a test can be set to perform a dual sweep. When enabled, the
SMU the will sweep from Start to Stop, and then continue to sweep from Stop back to
Start. When disabled, the SMU will only sweep from Start to Stop. For details, see
Understanding a Dual
• Power On Delay: When an ITM test is run, the SMUs for the given test power-on in a
specific sequence. A power-on delay can be set between the SMUs in the test. The Power
On Delay field is used to set this delay, which can be set from 0 to 0.100 s. For details, see
Power On Delay.
• Pulse Mode: When selected, the Pulse Mode combo box allows definition of a current
pulse sweep. The on and off times can be set from 5 ms to 10 s. Pulse output goes to the
sweep step levels during the pulse on times. During the off times, pulse output returns to the
specified Base Current level. For details, see
Pulse Mode can be selected ONLY when source and measure ranges are fixed. In
other words, Pulse Mode is disabled if the source or measure range is set to AUTO.
Return to
Section 6: Keithley Interactive Test Environment (KITE)
Sweeps).
Understanding log Current and Voltage
Sweep.
Section Topics
Understanding log
Pulse Mode.
Sweeps.
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