Agilent Technologies, Inc. DSO80604B 4 analog channel, 4GHz with a sample rate of 40GS/s @ 1 or 2CH used, 20GS/s @ 3 or 4 channels used (20GS/s monolithic A/D converter behind each channel). base memory 512kpts @ 1 or 2CH used, 256kpts @ 3 or 4 channels. Noise Floor 5mV/div-188uV(rms)