Very new to using an Oscilloscope but I have a DSO138, I think I've got it working how I want but not sure if the DSO138 is my limitation or the probes...I'm trying to set my amp gains and checking for a clipped signal at 40hz. At low gain around it is around 40v and it shows the signal as normal (1v-x5 setting), I keep raising the gain but it seems to go beyond the screen (past 60v max? tried changing the scale but it seems to go too high to show the signal). Do I need a higher spec Oscilloscope maybe DSO150? or can I change the probes to x10 and this should show me the higher voltage/signal? Hope that makes sense or I could be totally off-track....