I just bought this product recently.  It looks pretty nice, and I'm pretty sure I'm not using it to its full potential.  The specs say it samples at 100MS/s, yet that certainly is not happening with mine. From the looks of it, I see 2048 samples at 4.005 kHz. And by counting the marks between the time divisions (1ms apart), it does look like approx 4kHz.  Why is this not running faster? This is a far cry short of 100MS/s.  I also see no setting anywhere to change the sampling rate/speed.