Hello.
I just want to understand if this behaviour is normal only on Rigol scopes or if this ir normal to every entry level scope.
The behaviour I observe is that when I set a big time scale, for instance, 5 seconds or 10 seconds, the scope takes for ever to complete a 'rastering' operation (not sure if this is the correct wording). In fact it will take sec/div times number of divisions of the screen. The problem is not this, this is ok and understandable. What is not quite understandable, at least to me, is that when that raster 'entity' that we see sweeping the screen only becomes visible after the left half of the screen was swept. This means that I can't see anything while the raster thing doesn't reach the center division. Only after that I can see the raster sweeping the screen from the middle to the right. I can't see the raster from the beginning, on the left most side of the screen until the middle of the screen.
Is this normal? I see videos of other scopes where this doesn't happens. In fact, when a big time scale is selected, the voltage trace like resets and disappears from the screen and starts showing up again on the right side of the screen and going left as time goes by!
Example video at about 5:20: