IviScope Configure Edge Trigger Source
IviScope Base Capability Group
This VI configures the edge trigger. An edge trigger occurs when the trigger signal passes through the voltage threshold that you specify with the Trigger Level parameter and has the slope that you specify with the Trigger Slope parameter.
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Notes
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instrument handle The instrument handle that you obtain from the IviScope Initialize or the IviScope Initialize With Options VI. |
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trigger source Pass the source you want the oscilloscope to monitor for a trigger. The driver sets the IviScope Trigger Source property to this value.
After you call one of the IviScope Read Waveform, IviScope Read Min Max Waveform [MmW], IviScope Read Waveform Measurement [WM], or IviScope Initiate Acquisition VIs, the oscilloscope waits for the trigger from the source you specify in this parameter. This control accepts one of the valid channel names or additional trigger sources listed below. Virtual channel names are aliases for instrument specific channel strings. The instrument specific channel strings can differ from one instrument to another. Virtual channel names allow you to use and swap instruments without having to change the channel names in your source code. You assign a virtual channel name to an instrument specific channel through MAX. This control accepts virtual channel names you have assigned to the specific instrument you are using. It also accepts the instrument specific channel names. Additional Trigger SourcesIVISCOPE_VAL_EXTERNAL—External IVISCOPE_VAL_TTL0—PXI TRIG0 or VXI TTL0 IVISCOPE_VAL_TTL1—PXI TRIG1 or VXI TTL1 IVISCOPE_VAL_TTL2—PXI TRIG2 or VXI TTL2 IVISCOPE_VAL_TTL3—PXI TRIG3 or VXI TTL3 IVISCOPE_VAL_TTL4—PXI TRIG4 or VXI TTL4 IVISCOPE_VAL_TTL5—PXI TRIG5 or VXI TTL5 IVISCOPE_VAL_TTL6—PXI TRIG6 or VXI TTL6 IVISCOPE_VAL_TTL7—PXI TRIG7 or VXI TTL7 IVISCOPE_VAL_ECL0—VXI ECL0 IVISCOPE_VAL_ECL1—VXI ECL1 IVISCOPE_VAL_PXI_STAR—PXI Star IVISCOPE_VAL_RTSI_0—RTSI line 0 IVISCOPE_VAL_RTSI_1—RTSI line 1 IVISCOPE_VAL_RTSI_2—RTSI line 2 IVISCOPE_VAL_RTSI_3—RTSI line 3 IVISCOPE_VAL_RTSI_4—RTSI line 4 IVISCOPE_VAL_RTSI_5—RTSI line 5 IVISCOPE_VAL_RTSI_6—RTSI line 6 |
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Note IVISCOPE_VAL_EXTERNAL—The oscilloscope waits for a trigger on the external trigger input. |
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trigger level (volts) Pass the voltage threshold you want the oscilloscope to use for edge triggering. The driver sets the IviScope Trigger Level property to this value.
The oscilloscope triggers when the trigger signal passes through the threshold you specify with this parameter and has the slope you specify with the Trigger Slope parameter. Units: volts Default value: 0.0 |
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Note This parameter affects instrument behavior only when you select a channel or the external trigger input as the Trigger Source. You cannot configure the trigger level that the oscilloscope uses for other trigger sources. For example, if you select IVISCOPE_VAL_AC_LINE_TRIGGER as the trigger source, the oscilloscope triggers on zero crossings. |
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trigger slope Specify whether you want a rising edge or a falling edge passing through the Trigger Level to trigger the oscilloscope. The driver sets the IviScope Trigger Slope property to this value.
Defined Values: IVISCOPE_VAL_POSITIVE—Rising edge IVISCOPE_VAL_NEGATIVE—Falling edge Default value: IVISCOPE_VAL_POSITIVE |
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error in (no error) The error in cluster can accept error information wired from VIs previously called. Use this information to decide if any functionality should be bypassed in the event of errors from other VIs.
The pop-up option Explain Error (or Explain Warning) gives more information about the error displayed. |
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instrument handle out The instrument handle that you obtain from the IviScope Initialize or the IviScope Initialize With Options VI. |
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error out The error out cluster passes error or warning information out of a VI to be used by other VIs.
The pop-up option Explain Error (or Explain Warning) gives more information about the error displayed. |