Yokogawa DL9140 digital oscilloscope - equipped with 2.5 M word/ch record length dot density display technology and a wide variety of analysis and trigger functions. DL9000 models are available with 2.5 M points of waveform memory on each of four channels and with an "L" version containing 6.25 M points on each channel. In accumulate mode the DL9000 overlays up to 2000 acquisitions on the screen that you can scroll through to look for signal peculiarities.