David, Thanks for the shout and the great info you have stored in your "DRIVE" ICON BUTTON, ESP the "backup builder".... I do not know who the author is, but, my sincere thanks for the developer who donated the time and effort in the writing of these utilities. As the DSO2x1x series availability was scarce, I had ordered both the 2C and 2D models to ensure I got one anyway. Today my 2D15 arrived and let me tell you,,,, this sumbiatch performs WAY beyond expectations. My scope needs, or more correctly, wants, do not require an advanced scope like that of a Siglent SDS1202X-E and this Hantek fills the bill nicely. Some of my projects are in the sub 10 Hz range and while the Siglent may "go fast" really well, this scope "goes slow" in a very accurate way. The sig gen will output an accurate sub 10 Hz signal very well, (as shown in the pix), per the reported accuracy of the scope anyway, but this scope is a keeper for sure. A 1.001 Hz signal outputs correctly with frequency increments of .001 obtainable, which is surprising for this entry level scope. I have not yet ran into any "lock up" issues and the operation is solid; a little bit slow, but, it will serve my purposes well. Again, my THANKS to the author of the bevy of back up scripts.... Hank