Keithley SourceMeter 2400 Series User Manual

11-16 Triggering 2400 Series SourceMeter
®
User’s Manual
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
(TRIGger:COUNt 10). Operation will stay in the Trigger Layer until the 10 source-delay-
measure points of the sweep are performed.
If you wanted to repeat the sweep three times, the arm counter would be set to three
(ARM:COUNt 3). Three 10-point sweeps can then be performed for a total of 30 source-
delay-measure actions.
The maximum buffer size for the SourceMeter is 2500 readings. The product of the finite
values of the two counters 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 (INF). With an infinite arm count, the maximum trigger count is
2500.
NOTE With front panel operation only, 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 con-
nector) after various trigger model operations. An output trigger is used to trigger another
instrument to perform an operation. The default is no output triggers. See “Trigger link”
later in this section for more information.
Trigger layer output triggers — The SourceMeter can be programmed to output a trigger
after each action of the SDM cycle (Source, Delay and Measure). Output triggers are con-
trolled with the TRIGger:OUTPut command.
For example, to output a trigger after the Measure Action, the following command must be
sent:
TRIGger:OUTPut SENSe
The above command disables output triggers for the Source and Delay Actions since their
parameter names (SOURce and DELay) are not included in the parameter list.
When used with a scanner, an output trigger after each measurement can signal the scan-
ner to select the next channel in the scan.
Arm layer output trigger — As shown in Figure 11-3, the SourceMeter can be pro-
grammed to output a trigger when operation leaves the Arm Layer and enters the Trigger
Layer, or after operation leaves the Trigger Layer and enters back into the Arm Layer. This
output trigger is typically sent to another instrument to signal the end of a scan or sweep.
The ARM:OUTPut command is used to control these output triggers. The TENTer param-
eter enables the trigger on entering the Trigger Layer, the TEXit parameter enables the
trigger on exiting the Trigger Layer, and the NONE parameter disables both output
triggers.
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Keithley SourceMeter 2400 Series Specifications

General

Brand	Keithley
Model	SourceMeter 2400 Series
Category	Measuring Instruments
Language	English