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DSO stands for digital storage oscilloscope. DPO stands for digital phosphor oscilloscope. A DPO is also a DSO. And a DSO can also be a DPO. So what exactly is a DSO and what is a DPO?
A DSO is typically a real-time sampling oscilloscope. Realtime sampling simply means that the scope is able to capture signals in a single acquisition utilizing a high-sample-rate analog-to-digital converter (ADC). In other words, a DSO doesn't utilize repetitive acquisitions to "build-up" sufficient samples to represent the signal under test (equivalent-time sampling), although this isn't a hard-and-fast rule.
As mentioned before, a DPO is also DSO. But a DPO adds one additional element that allows it to better represent the signal's third dimension. The...