I have a 1052E that's been hacked to 100mhz. I have an old piece of equipment that outputs an X, Y and Z "vector" signal onto a display tube. Hooking up the Rigol in place of the tube, I can see the picture but it's small in the lower right corner of the screen. Adjusting scale full on X and Y increases it's size slightly, but still the image is barely taking up any of the screen. Am I missing something? I've had no issue filling the entire display area using an old HP analog scope.