ScopeTVTrigger Class
- Updated2023-09-06
- 3 minute(s) read
ScopeTVTrigger Class
Represents the ScopeMeasurement sub-object that contains properties and methods related to the video reference trigger.
Inheritance Hierarchy
SystemObject
NationalInstruments.ModularInstruments.NIScopeScopeSubObject
NationalInstruments.ModularInstruments.NIScopeScopeTVTrigger
NationalInstruments.ModularInstruments.NIScopeScopeSubObject
NationalInstruments.ModularInstruments.NIScopeScopeTVTrigger
Namespace: NationalInstruments.ModularInstruments.NIScope
Assembly: NationalInstruments.ModularInstruments.NIScope.Fx45 (in NationalInstruments.ModularInstruments.NIScope.Fx45.dll) Version: 2023
Syntax
public sealed class ScopeTVTrigger : ScopeSubObject, IIviScopeTriggerTV
Public NotInheritable Class ScopeTVTrigger Inherits ScopeSubObject Implements IIviScopeTriggerTV
The ScopeTVTrigger type exposes the following members.
Properties
| Name | Description | |
|---|---|---|
 | DCRestoreEnabled |
Gets or sets whether the video-triggered data retrieved by the digitizer should be restored to the video signal's zero reference point.
|
| LineNumber |
Gets or sets the line on which to trigger, if TriggerEvent is set to LineNumber.
|
| Polarity |
Gets or sets whether the video signal sync is positive or negative.
|
| SignalFormat |
Gets or sets the type of video signal.
|
| TriggerEvent |
Gets or sets the condition in the video signal that causes the digitizer to trigger.
|
Methods
| Name | Description | |
|---|---|---|
 | Configure |
Configures the common properties for video triggering, including the signal format, TV event, line number,
polarity, and enable DC restore. A video trigger occurs when the digitizer finds a valid video signal sync.
When you initiate an acquisition, the digitizer waits for the start trigger, which is configured through the
Source attribute.
The default 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 a method such as this one.
Upon receiving the reference trigger the digitizer finishes the acquisition after completing posttrigger
sampling. With each Configure Trigger method, you specify configuration parameters such as the trigger
source and the amount of trigger delay.
|
| Equals | Determines whether the specified object is equal to the current object. (Inherited from Object.) |
| GetHashCode | Serves as the default hash function. (Inherited from Object.) |
| GetType | Gets the Type of the current instance. (Inherited from Object.) |
| ToString | Returns a string that represents the current object. (Inherited from Object.) |
Remarks
For more information, refer to the Trigger Video/TV attributes topics in the NI-SCOPE Function Reference Help.
Thread Safety
Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.