... BTW why manufacturers don't include in bench oscilloscopes a way to use an external DC power supply? is it because of triggering option with AC source?
Maybe because they are bench oscilloscopes, not portable oscilloscopes
Owon has a bench scope with battery, making it a portable scope. bench is not the proper argument
I would argue mentioning Owon is not proper argument.
You don't get to choose what is proper argument for me making case.
You have right to ignore my opinion, not to choose how am I allowed to argue my case...
And we only informed you how industry looks at it. Bench is bench..
Once people start making nomadic(c) oscilloscopes they will have their own category.
Benchtop instruments are established category. Mains powered, tabletop instruments. As opposed to handheld, portable batter powered instruments. They are divided that way, because design priorities and compromises are vastly different.
So simply, you need to buy portable scope. You are allowed to use it at the bench too..
And most of the benchtop scopes would need battery pack that would double the weight of the scope. It would not be as portable as you think.
Similarly, if you had DC power input, you would still had to carry scope and battery pack at the same time.
It is easier to just plug it in somewhere else in the lab.
If you are going outside of the lab, you need proper portable (handheld) scope. Trust me. Holding a benchtop scope with battery pack, while on a ladder 2m up, poking into small enclosure with electronics is not fun...
Anywhere else you go, where you have desk, you will have power outlet too.. And by the time you unpack, boot time is irrelevant...