Pulse Modes; Pulse Measurement Types (Pmu) - Keithley 4200A-SCS User Manual

Model 4200A-SCS Pulse Card (PGU and PMU) User's Manual

Pulse modes

The PGU and PMU support the following pulse modes:
•
Standard pulse mode: For this two-level pulse mode, the user defines a high and low level for the
pulse output. The test modes for standard pulse are pulse I-V and waveform capture. See
parameter definitions
•
Segment Arb
consists of three or more line segments. Segment Arb pulse mode for the PGU and PMU
includes sequencing and sequence looping (see seg_arb_sequence and seg_arb_waveform.
Also see
•
Full-arb pulse mode: For this multi-level pulse mode, the waveform consists of a number of
user-defined points (see arb_array and arb_file). Also see
for details on parameters.
KPulse supports all of these pulse modes.
Descriptions of the LPT functions are provided in Model 4200A-SCS LPT Library Programming.

Pulse measurement types (PMU)

The following table summarizes pulse measurement types that are available through LPT commands
for the 4225-PMU. See
Pulse measurement types
Measurement type
Spot mean discrete
Spot mean average
Waveform discrete
Waveform average
4200A-PMU-900-01 Rev. A December 2020
(on page 3-34) for the standard (two-level) pulse mode.
®
waveform: For this multi-level pulse mode, the user defines a pulse waveform that
Segment Arb waveform (on page 4-10) for details on parameters.
Measurement types
Description
Samples a portion of the high and low levels. The samples are averaged to yield a
single current and voltage reading for the high level and low level (see the Spot
mean measurements example figure;
A specified number of pulse periods are output for the burst sequence. Spot mean
discrete measurements are performed for each pulse and then averaged to yield a
single voltage and current reading for the high and low levels.
The entire pulse is sampled. Sampling is performed on the rise time, top width, and
fall time portions of the pulse. A voltage and current reading is yielded for every
sample taken on the pulse (see
measurements and Waveform measurements (with pre-data and post-data) figures).
A specific number of pulses are output for the burst sequence. Waveform discrete
measurements are performed on each pulse. The corresponding samples for each
pulse are then averaged to yield a group of voltage and current readings for the
burst sequence.
Full Arb waveform
(on page 4-23) for detailed information.
Measurement types
Measurement types
Section 4: Pulse card concepts
Pulse
(on page 4-13)
(on page 4-23)).
(on page 4-23) Waveform
4-3