For waveform capture, measurement samples are acquired on pulse rise, pulse amplitude, pulse fall,
and a small portion before the rise (pre-data) and after the fall (post-data) on the base level, as shown
in the following figure.
Figure 43: Waveform capture
For detail on spot mean measurements, refer to Spot mean measurements (on page 4-24). For user
test module (UTM) programming, refer to the pulse_meas_sm function.
For detail on waveform measurements, refer to Waveform measurements (on page 4-25). For UTM
programming, the pulse_meas_wfm function is used to configure waveform measurements.
For UTMs, the pulse_meas_timing function allows you to adjust the measure window for the pulse
I-V test mode or the pre-and post-data settings for the waveform measurements. For ITMs, the
measure window and pre-data and post-data settings are fixed.
Function descriptions are provided in Model 4200A-SCS LPT Library Programming.
Measure Mode
For Measure Mode, you can select Average Pulses or Discrete Pulses.
When Average Pulses is selected for Pulse IV, the measured values of two or more pulses are
averaged. See the Pulse IV (Average pulses) measurement example (on page 3-18). For Waveform
Capture, select Average Pulses to average each sample in the waveform with the same point in
subsequent waveforms, for each pulse specified by the number of pulses.
When Discrete Pulses is selected for Pulse IV, the measured value of each pulse is acquired. Refer
to the Pulse IV (Discrete pulses) measurement example (on page 3-18). For Waveform Capture, each
sample for every waveform is recorded in the Analyze sheet. Refer to the Waveform Capture
(Discrete Pulses) measurement example (on page 3-19).
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