Table Of Contents
Configure Trigger (Analog » Edge) (G Dataflow)
Configures common properties for edge triggering.
An edge trigger occurs when a signal crosses a trigger threshold you specify.
trigger coupling
The method used to couple the trigger signal.
| Name | Value | Description |
|---|---|---|
| AC | 0 | Couples the trigger signal with an AC current. |
| DC | 1 | Couples the trigger signal with a DC current. |
| HF Reject | 3 | Couples the trigger signal with a high frequency reject filter. |
| LF Reject | 4 | Couples the trigger signal with a low frequency reject filter. |
| AC Plus HF Reject | 1001 | Couples the trigger signal with an AC current and a high frequency reject filter. |
Default: DC
trigger slope
The trigger edge on which to trigger the digitizer.
session in
Handle that identifies the NI-SCOPE instrument session as previously allocated by Initialize With Options .
error in
Error conditions that occur before this node runs.
The node responds to this input according to standard error behavior.
Standard Error Behavior
Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.
Default: No error
trigger source
The source you want the digitizer to monitor for a trigger.
| Name | Description |
|---|---|
| Channel 0 | Monitors Channel 0 for a trigger signal. |
| Channel 1 | Monitors Channel 1 for a trigger signal. |
| Channel 2 | Monitors Channel 2 for a trigger signal. |
| Channel 3 | Monitors Channel 3 for a trigger signal. |
| Channel 4 | Monitors Channel 4 for a trigger signal. |
| Channel 5 | Monitors Channel 5 for a trigger signal. |
| Channel 6 | Monitors Channel 6 for a trigger signal. |
| Channel 7 | Monitors Channel 7 for a trigger signal. |
| External TRIG | Monitors an external trigger input for a trigger signal. |
Default: Channel 0
trigger level
The voltage threshold for the trigger.
Default: 0.00
trigger holdoff
The length of time the digitizer waits after detecting a trigger before enabling NI-SCOPE to detect another trigger.
Default: 0.00
trigger delay
The length of time the digitizer waits after it receives the trigger to start acquiring data.
session out
Reference to the NI-SCOPE instrument session to pass to the next node in the program.
error out
error out contains error information. This output provides standard error out functionality.
Trigger System Operation
When you initiate an acquisition, the trigger system operates in the following manner:
- The digitizer waits for the start trigger, which is configured through the Start Trigger Source property. The default value is immediate.
- Upon receiving the start trigger, the digitizer begins sampling pretrigger points.
- After the digitizer finishes sampling pretrigger points, the digitizer waits for a reference (stop) trigger that you specify with an instance of Configure Trigger.
- Upon receiving the reference trigger and then after completing posttrigger sampling, the digitizer finishes the acquisition.
You specify configuration parameters such as the trigger source and trigger delay with each Configure Trigger instance. Additionally, you can adjust the amount of pretrigger and posttrigger samples using reference position in Configure Horizontal Timing . The default is half the record length.
For multirecord acquisitions, all records after the first record are started based on the setting of the Advance Trigger Source property. The default value is immediate.
Where This Node Can Run:
Desktop OS: Windows
FPGA: Not supported
Web Server: Not supported in VIs that run in a web application
Hardware Support:
This node does not support the following hardware: PXIe-5622