Thanks. The PC is one which is only operating at USB 1 speeds, which seems to be the problem. Using one running USB 2 it will go at least a couple of times faster without problem.

The status value of ps3000_get_streaming_last_values is success, as it ps3000_overview_buffer_status in the call where bogus (minus 32768) values are returned.

I'm using fast streaming mode for a 3224 on an XP system. I am not using triggering or autostop, as it wants to run continuously and analyze the data stream in nearly real time. Aggregation is set to 2, on the idea that you're returning a min and max anyway, so might as well use both of them. With a...

Thanks. Makes sense. Sorry about the dumb overflow flag question.

Having fun messing with this. Very cool device.

So is the driver asynchronously copying data from the max_samples to the overview_buffers before it wraps? Or should max_samples always be at least as big as overview_buffers so the data is always valid? When I run with max_samples at, say, 200, and get more than 200 back in overview_buffers, the ov...

The max_samples value will cause the driver to allocate non-paged memory and is the circular buffer used to buffer samples between calls to ps3000_get_streaming_last_values, right? The overview buffer is paged process memory, right? The amount of memory allocated depends on which channels are enable...