please excuse my ignorance
where is the bottleneck in the system and why do you need a large buffer?
I would have thought that the scope is running at its maximum sample rate all the time (20MS/s)....the data must then move to the PC and be displayed or stored in PC RAM...I would have thought that USB 2.0 (480 Mbps) would be fast enough to handle the data output of the oscilloscope, because if the scope samples at 20MS/s and at a resolution of 12bits that equals 240Mbps which is well within USB 2.0 speed.
Now what happens if u are using USB 1.1 (12Mbps) obviously the PC cant receive data fast enough. I still cant see the point in having the buffer (its only 512K), if the scope samples at 20MS/s its going to fill the buffer in .025 of a second...how is this going to be of any use in an automotive situation like measuring ignition waveforms??
I have no idea of what the buffer does