Thanks for your reply gyro
. your OWON VDS1022I Quick Teardown (versus the Hantek 6022be) topic helped me a lot about choosing my 1st oscilloscope .It was a great help for me to know about the internal construction of OWON VDS1022 with those teardown photos you had posted on eevblog , thanks again
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Oops! I have totally missed the fact that AD9288 had dual individual ADC in a single chip,so individual channel can achieve 100msps. Thanks for pointing out that fact
. now it feels like I choose the best “ bang for the buck ” one