The Reference says that "The "Relative to" property Specifies the point in the buffer at which to begin a read operation."
"DAQmx_Val_FirstSample" means "Start reading samples relative to the first sample acquired".
and "DAQmx_Val_FirstPretrigSamp" means "Start reading samples relative to the first pretrigger sample. You specify the number of pretrigger samples to acquire when you configure a reference trigger. "
My question is : what's the difference between "the first sample acquired" and "first pretrigger sample"?
In a "reference trigger " condition,are they -- "the first sample acquired" and "first pretrigger sample" mean the same sample(the first sample acquired after receiving the "start" command,which are sent by a command or a starttrigger?)? Or in another word, what are "pre-trigger samples"?
^_^^_^
