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The QTPlgVideoDigitizerTrigger class allows you to retrieve and/or change an IIDC camera’s trigger parameters. You can find more information about the types of parameters that can be described using the properties of the QTPlgVideoDigitizerTrigger class consulting the section of the document document.

You can obtain instances of this class from objects only.







The QTPlgVideoDigitizerTrigger class constructors are called when you create a new instance of the class, while the ˜QTPlgVideoDigitizerTrigger class destructor, is called automatically when the class is no more in use. Also, you can invoke the class destructor by setting the instance of the class to nil.

You can not create valid instances of this class by yourself; instead, you can obtain valid QTPlgVideoDigitizerTrigger instances whether from dictionaries or by using the method of the class. You can inspect the capabilitites and state of the returned parameter and, if you need, change its state and then push back it to the video digitizer by using the class method.

Once a new class instance is returned, it is good practice to check the class property to be sure that the new object can be used.


The class provides you with the following initializer methods:
(other as QTPlgVideoDigitizerTrigger)
This is the copy constructor. The properties of the object to be copied will be used to initialize the new class instance properties

specifies if the trigger can be turned on
specifies if the trigger can be turned off
specifies if the trigger can be active high
specifies if the trigger can be active low
specifies if the trigger can operate in mode 0. In mode 0, the camera starts integrating light at the active edge of the external trigger. The integration time is controlled by the shutter
specifies if the trigger can operate in mode 1. In mode 1, the camera starts integrating light at the active edge of the external trigger. The integration time is equal to the time the trigger is active
specifies if the trigger can operate in mode 2. In mode 2, the camera starts integrating light at the active edge of the external trigger. Integration continues until the nth active edge, where n is greater than or equal to 2
specifies if the trigger can operate in mode 3. In mode 3, the camera starts integrating light at the active edge of the internal trigger. The trigger’s cycle time is n times the cycle time of the fastest frame rate, where n is greater than or equal to 1. Integration time is controlled by the shutter
specifies if the trigger’s value can be specified in unitless terms
specifies if the trigger’s value can be specified in absolute (engineering) units of time
determines if to turn on the trigger if applicable; changes to this property affect the state of the property if applicable as well
determines if to turn off the trigger if applicable; changes to this property affect the state of the property if applicable as well
determines if the trigger is active high if applicable; changes to this property affect the state of the property if applicable as well
determines if the trigger is active low; changes to this property affect the state of the property if applicable as well
determines if the trigger is or should operate in mode 0. In mode 0, the camera starts integrating light at the active edge of the external trigger. The integration time is controlled by the shutter ; changes to this property affect the state of the , , properties if applicable as well
determines if the trigger is or should operate in mode 1. In mode 1, the camera starts integrating light at the active edge of the external trigger. The integration time is equal to the time the trigger is active; changes to this property affect the state of the , , properties if applicable as well
determines if the trigger is or should operate in mode 2. In mode 2, the camera starts integrating light at the active edge of the external trigger. Integration continues until the nth active edge, where n is greater than or equal to 2; changes to this property affect the state of the , , properties if applicable as well
determines if the trigger is or should operate in mode 3. In mode 3, the camera starts integrating light at the active edge of the internal trigger. The trigger’s cycle time is n times the cycle time of the fastest frame rate, where n is greater than or equal to 1. Integration time is controlled by the shutter ; changes to this property affect the state of the , , properties if applicable as well
determines if the trigger’s value has to be specified in unitless terms; changes to this property affect the state of the property if applicable as well
determines if the trigger’s value has to be specified in absolute (engineering) units of time; changes to this property affect the state of the property if applicable as well
when is set, determines the number of transitions
when is set, determines the frame rate multiplier
specifies the minimum trigger value when is true
specifies the maximum trigger value when is true
when using absolute units, the double representation of the value in either (if is set) or (if is set)