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Acquires and displays data for one or two channels. The NI ELVISmx Oscilloscope supports analog and digital triggering. For digital triggering, you must connect a TTL-level signal to the TRIG line on the NI ELVIS II Series Workstation. For analog triggering, you can set the trigger level and slope.
|Dialog Box Options|
|Block Diagram Inputs|
|Block Diagram Outputs|
|How to Measure Signals Using the NI ELVISmx Oscilloscope|
|Autoscale graph||Specifies whether to autoscale the X-Y scale of the graph. If autoscaling is enabled, the X-Y scale of the graph is autoscaled each time the graph is updated. If autoscaling is disabled, the X-Y scale of the graph maintains its settings.|
|Instrument Control||Contains the following options:
|Vertical (Channel 0 tab)||Channel 0 appears only if the Channel 0 checkbox is enabled.
|Vertical (Channel 1 tab)||Channel 1 appears only if the Channel 1 checkbox is enabled.
|Horizontal||Contains the following options:
|Trigger||Contains the following options:
|Channel 0||Contains the following options:
|Channel 1||Contains the following options:
|Device Name||Specifies the name of the I/O device in use.|
|Stop||Specifies to stop the task and release device resources when this Express VI completes execution. This input is TRUE by default, meaning the task stops after all samples are acquired or generated. For continuous operations, put the Express VI in a While Loop and wire the stop input to the same stop control you wire to the conditional terminal on the While Loop. This will prevent the task from being reconfigured with each iteration of the loop, as well as stop the task and release the resources when the While Loop is stopped.|
|CH0 Enable||Specifies whether to enable data acquisition on Channel 0.|
|CH1 Enable||Specifies whether to enable data acquisition on Channel 1.|
|Horizontal||Specifies the Sample Rate, Record length, and Acquire method.|
|Trigger||Specifies the Source, Slope, Type, Level (V), and Horizontal Position (%).|
|error in||Describes error conditions that occur before the VI runs.|
|ELVIS/Channel0||Contains the samples read from Channel 0. Channel 0 must be enabled for data to be returned.|
|ELVIS/Channel1||Contains the samples read from Channel 1. Channel 1 must be enabled for data to be returned.|
|error out||Contains error information. If error in indicates that an error occurred before this VI ran, error out contains the same error information. Otherwise, it describes the error status that this VI produces.|
Complete the following steps to use the NI ELVISmx Oscilloscope to measure a signal.
|Note For more information on grounding the signals, refer to the NI ELVIS II Series User Manual.|