Keithley 4200A-SCS Reference Manual page 311

Section 6: Clarius Model 4200A-SCS Parameter Analyzer Reference Manual
More than one SMU in the test can be pulsing. If the pulse on or off times for the SMUs are different,
the longer on and off times take precedence so that the SMUs operate synchronously and run at the
same speed.
An example single-sweep pulse output for the Voltage Bias operation mode is shown in the following
figure. The pulse output goes to the specified pulse level during the pulse on time. If the instrument is
set to measure, the measurement occurs after the on time expires and before the transition to the off
time. During pulse off time, the pulse output returns to the specified Base Voltage level. After the off
time expires, the output returns to 0 V.
Figure 233: Pulse Mode example: Voltage bias: 2 V level, 1 V base
When a measurement is made, it effectively increases the on time by the amount of time required to
make the measurement.
To minimize this extra time:
1. Select Test Settings.
2. Select Advanced.
3. For the Speed, select Custom.
4. Set the Delay Factor to 0.
5. Set the Filter Factor to 0.
6. Set the A/D aperture time to 0.01.
This is the fastest measurement timing, but it reduces accuracy.
For a sweep operation mode, pulse output goes to the sweep step levels during the pulse on times.
During the off times, pulse output goes to the specified Base Voltage (or Base Current) level. If set to
measure, the measurement will occur after each on time period expires and before the pulse
transitions to the off time level.
6-42 4200A-901-01 Rev. C / February 2017