Is the term "High-Speed Digitizer" same as saying "data acquisition device with high sampling rate"?
The definiton I encounter for a digitizer is: " A digitizer is a hardware device that receives analog information, such as sound or light, and records it digitally"
But some companies insists on using both terms which makes me confused. Can we say a digitizer is exactly the same thing with data-acquisition hardware? Synonyms?
Electrical engineering (and most types of engineering really) don't have a big book of 'ye old definitions'. Not only do different people use different definitions, sometimes definition will change based on context.
For an automated-test designer, a digitizer will probably be a device that takes an analog waveform and turns it into a digital stream of bits. (the key that separates them from oscilloscopes is that they are usually continuous, instead of triggered-bursts which is what scopes do). This would be similar to what you show from the Keysight page.
For people doing something like structural analysis of a mechanical structure, a digitizer might include a bunch of sensors too.
For an artist, a digitizer is a device that allows them to scan images or books into a digital format.
This is also why books in the field of engineering will generally clearly define important terms so there is no confusion about them.
