Model 4200A-SCS Parameter Analyzer Reference Manual
Section 13: LPT library function reference
4200A-901-01 Rev. C / February 2017
13-121
Pulse mode
Standard
Details
The relationship between a step function and a sweep function for SMUs is illustrated in
(on page 3-36). The step/sweep relationship for pulsing is similar (see
(on page 6-63)). While a terminal of a device is at a pulse step, a pulse
sweep is performed on another terminal.
A
pulse_step_linear
function cannot be used by itself. At least one PMU channel in a test must
be a valid
pulse_sweep_linear
function call. The last three sweep types are for pulse dual
sweeps (see
(on page 6-71)).
Use the
start
,
stop
, and
step
parameters to configure stepping. In addition, ensure that all pulse
parameters are set before calling the
pulse_sweep_linear
or
pulse_step_linear
function. For
example, when performing a pulse amplitude sweep (
PULSE_AMPLITUDE_SP
), use
pulse_vlow
to
set the base voltage.
Amplitude and base level:
The pulse card can step or sweep amplitude (with base level fixed) or step or sweep base level (with
amplitude fixed).
SweepType
examples:
•
PULSE_AMPLITUDE_SP
(stepping or sweeping): Start = 1 V, stop = 5 V, step = 1 V
Voltage amplitudes for pulse output sequence: 1 V, 2 V, 3 V, 4 V, and 5 V.
Note: Use the
pulse_vlow
function to set the base level voltage.
•
PULSE_BASE_SP
(stepping or sweeping): Start = 5 V, stop = 1 V, step = -1 V
Voltage base levels for pulse output sequence: 5 V, 4 V, 3 V, 2 V, and 1 V.
Note: Use the
pulse_vhigh
function to set the amplitude voltage.
DC voltage level:
The pulse card can step or sweep a DC level. SweepType example:
PULSE_DC_SP
(stepping or sweeping): Start = 1 V, stop = 5 V, step = 1 V
DC voltage output sequence: 1 V, 2 V, 3 V, 4 V, and 5 V.
Pulse period:
The pulse period is the time interval between the start of the rising transition edge of consecutive
output pulses (see
(on page 6-102)). SweepType example:
PULSE_PERIOD_SP
(stepping or sweeping): Start = 0.01 s, stop = 0.05 s,
step = 0.01 s
Pulse periods for output sequence: 0.01 s, 0.02 s, 0.03 s, 0.04 s, and 0.05 s.
