3: Functions and features Model 2461 Interactive SourceMeter® Instrument
3-128 2461-901-01 A/November 2015
Using SCPI commands:
To retrieve the settings for all trigger model blocks, send the command:
:TRIGger:BLOCk:LIST?
Using TSP commands:
To check the settings for a block, send the command:
print(trigger.model.getblocklist())
To retrieve the TSP code for trigger model blocks that were entered through the front panel, change
the Event Log "Command" setting to On. Refer to Using the event log (on page 2-142) for additional
information.
Improving the performance of a trigger model
To improve the performance of a trigger model:
• Reduce the number of blocks to less than 15.
• Do not use multiple reading buffers.
• Use four or fewer delay blocks.
• Use four or fewer measure or digitize blocks.
• Do not have multiple blocks waiting on the same event.
• Verify that constant delay blocks are set to less than 254 ms.
• Limit use of configuration list blocks.
Action overruns
An action overrun occurs when a trigger object receives a trigger event and is not ready to act on it.
The action overruns of all trigger objects are reported in a command for the associated trigger object.
See the appropriate sections on each trigger object for further details on conditions under which an
object generates an action overrun.
Running the trigger model
You can run the trigger model when the instrument is controlled either locally or remotely. Note that if
you change from remote to local control, the trigger model measurement method remains selected
until you change it.
When you run the trigger model, the existing instrument settings are used for any actions unless you
assigned configuration lists to the trigger model.
Trigger model operation is an overlapped process. This means that you can run other commands
while a trigger model is running if they do not conflict with trigger model operation. For example, you
can print the buffer contents, but you cannot change the source-measure function.
The initiate command is the overlapped command that starts the process. The command interface is
available immediately after the instrument executes the initiate command so that other commands
can be executed while the trigger model is running.
To change the measurement method, see Switching between measurement methods (on page 3-99).
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