You can just set the sample count really high (up to 1 trillion). The samples are not compressed in RAM, so the maximal capture time is determined by the size.

You can just set the sample count really high (up to 1 trillion). The samples are not compressed in RAM, so the maximal capture time is determined by the size. For 8 GiG and 24 MHz this means you can capture for ~6 minutes. I tend to simply set the sample count higher than needed and stop the capture prematurely.