Triggers

A trigger is an external stimulus that initiates one or more device functions. In the NI-568x API, you configure the type of trigger you want to use with the ni568x Configure Trigger Source VI or the ni568x_ConfigureTriggerSource function.
Note   The USB-5680 does not support triggering.

RF power sensors support the following types of triggers:

  • Immediate—The device does not wait for a trigger and makes the measurement immediately.
  • External—The device starts an acquisition based on the signal on the external trigger input terminal meeting specified criteria, such as slope, trigger delay, and trigger hysteresis. External triggers are supported only in time slot and scope acquisition modes.
  • Internal—The device starts an acquisition based on the input signal you are measuring meeting specified criteria, such as slope, level, trigger delay, and trigger noise immunity. Internal triggers are supported only in time slot and scope acquisition modes.
  • Software—The device waits for a software trigger. After configuring the trigger type, you assert this trigger by calling the ni568x Send Software Trigger VI or the ni568x_SendSoftwareTrigger function.