JYE Tech Forum

Assembled my DSO068 last night. All the test voltages are spot on and the LCD works fine. Scope also boots up, but when I ran the wire to calibrate the waveform, the top of the square wave is off the screen. I'm new to scopes, but I'm pretty sure I have the settings configured exactly per the instructions. I watched some youtube construction videos and something definitely seems to be amiss. Any ideas what could cause this or what to look at? Here's a picture of what it looks like:

The signal amplitude might have been set to 5V. It needs to be set to 1V for calibrating the 0.1V range. You can press ADJ to enter the menu and select Test Signal to change its amplitude.