The 4000 Series family includes the DPO4000 Series and the MSO4000 Series. The DPO4000 Series Digital Phosphor Oscilloscopes (DPOs) are the first oscilloscopes to offer usable deep memory on all channels, excellent performance, serial trigger and analysis options, and all in the most compact form factor in their class. The MSO4000 Series Mixed Signal Oscilloscopes (MSOs) provide all the features and benefits of the DPO4000, but add 16 integrated digital channels, enabling you to visualize and correlate analog and digital signals on a single instrument. This integration extends triggering functionality across all 20 channels providing pattern and state triggering ideal for debugging mixed analog and digital designs.