Crystal oscillator wave shape?
This is a classic square wave as detected by a scope set up with an inadequate ground connection. A few tips (in order of importance):

1 - Connect the scope ground as close to the clock ground as possible.

2 - Make sure the clock chip is bypassed as close as humanly possible to the ground and power leads, with the capacitor leads as short as possible.

3 - If you have a choice of ground leads for the scope, use the shortest one available.

4 - Connect the scope probe as close to the clock output as possible.