User Manual

11-6 Triggering 2400 Series SourceMeter
®
User’s Manual
NOTE The Delay Action is set from the CONFIGURE V-SOURCE or CONFIG-
URE I-SOURCE menu. See Section 3, “Source delay.”
In MULTIPLE mode, the soak time takes the place of the delay time only
during the first SDM cycle after the initial sweep trigger. See
Section 7,
“Auto range change mode.”
MEASURE Action — During this phase of the SDM cycle, the measurement pro-
cess takes place. If the repeat filter is enabled, as shown in the blow-up drawing
for Measure Action, the instrument samples the specified number of reading con-
versions to yield a single filtered reading (measurement). If using the moving filter
or if the filter is disabled, only a single reading conversion will yield a reading.
Counters
Programmable counters are used to repeat operations within the trigger model
layers. For example, if performing a 10-point sweep, the trigger counter would be
set to 10. Operation will stay in the Trigger Layer until the 10 source-delay-mea-
sure points of the sweep are performed.
If you wanted to repeat the sweep three times, the arm counter would be set to
three. Three 10-point sweeps can then be performed for a total of 30
source-delay-measure actions. Refer to the examples at the end of this section.
The maximum buffer size for the SourceMeter is 2500 readings. The product of
the two counter values cannot exceed 2500. For example, if you set an arm count
of two, the maximum trigger count will be 1250 (2500 / 2 = 1250). However, you
can set the arm count to INFINITE. With an infinite arm count, the maximum trig-
ger count is 2500.
NOTE When a sweep is configured, the trigger model settings will not change
until the sweep is started. After the sweep is finished, the trigger model
will reset to the previous settings.
Output triggers
The SourceMeter can be programmed to output a trigger (via rear panel Trigger
Link connector) after various trigger model operations. An output trigger is used to
trigger another instrument to perform an operation. See “Trigger link,” page 11-19,
for more information.
Trigger Layer Output Triggers — After each action (Source, Delay, and Measure),
the SourceMeter can be programmed to send out an output trigger if Trigger Link
is the selected Trigger-In Source. For example, if the Trigger Out Event for Mea-
sure is ON, an output trigger will be sent after the Measure action. When used
with a scanner, an output trigger after each measurement can signal the scanner
to select the next channel in the scan.