HugeMan, I don’t know whether your Quad has the same hardware as the mine, but of sure the mine has a -3dB cutoff around 2-3MHz.
Please, specify whether the probe could be so relevant in the test, because I have considered it always in my tests.
I don’t understand what you stated also: at the very beginning of your post you are saying that the analog bandwidth is 10MHz, then at the end you say is 5MHz. What is the correct value?
I’d love to detect a 10-15MHz of real bandwidth. It means inputting a 10MHz @1Vpp sine on the probe and reading around 700mVpp on the display. Being step-shaped, no matter if I read 700mVpp or 750mVpp. On my test I read a supposed 400mVpp!
If you have a Quad granting 10MHz of overall bandwidth, I’ll swap with the mine as soon. I will pay the shipping charge also!
About the sampling rate, I have also detected 72Ms/s and it could be fully acceptable from my viewpoint.
Thanks.