User manual

10-14 Sweep Operation 2400 Series SourceMeter
®
User’s Manual
Setting delay
Generally, the time duration spent at each step (or point) of a sweep consists of
the source delay and the time it takes to perform the measurement (NPLC set-
ting).
NOTE For the Model 2430 Pulse Mode, source delay is not used. Instead, pulse
width (for the on-time) and pulse delay (for the off-time) are the delays
that are set by the user. Pulse Mode sweeps are covered later in this
section.
The source delay is part of the SDM cycle and is used to allow the source to settle
before the measurement is made. (See Section 6, “Source-delay-measure cycle,”
for details).
The total time period of the source delay could include an auto-delay and/or a
user programmed delay. With auto-delay enabled, 1ms of delay is used. The user
programmable source delay adds 0000.0000 to 9999.9990 seconds of delay. See
Section 3, “Source delay,” to set these delays).
Additional delay for a sweep is available by using the trigger delay. This user-
specified delay (0000.0000 to 9999.99990 seconds) occurs before each SDM
cycle (device action) of the sweep. Thus, the trigger delay is executed before
each new source-point in the sweep. See Section 11, “Trigger models” and “Con-
figuring triggering,” to set trigger delay.
NOTE For linear staircase, log staircase, and custom sweeps, source delay,
trigger delay, and NPLC settings are global and affect all sweep points
simultaneously. For source memory sweep only, both the source delay
and NPLC settings can be set to different values for each point in the
sweep.
Trigger count and sweep points
The trigger count and number of sweep points should be the same or multiples of
one another. For example, with five sweep points and a trigger count of 10, the
sweep will run twice. See Section 11 for details on trigger count.
Performing sweeps
Procedures for the various sweep types are covered below.
NOTE For the Model 2430, the following procedure assumes that the DC mode
of operation is selected (“Vsrc” or “Isrc” displayed in source field). If in the
Pulse Mode (“Vpls” or “Ipls” displayed), you can return to the DC Mode