Search found 2 matches

by WolfgangHOME
Wed Nov 02, 2016 8:38 am
Forum: DSO 068
Topic: input signal overlapped with square wave
Replies: 0
Views: 2192

input signal overlapped with square wave

I pretty much finished my project. After having replaced a defective crystal the DSO is booting correctly and all voltages are ok. However now I see that any signal I put at the input of the DSO is overlapped with a strange kind of square wave. I investigated that in more detail using a triangle wav...
by WolfgangHOME
Tue Nov 01, 2016 12:08 pm
Forum: DSO 068
Topic: Bad Crystal
Replies: 5
Views: 8878

Re: Bad Crystal

I also had a bad crystal resulting in a failed powering-up test 1. When I replaced the crystal the test was passed successfully. Look slike this is a critical bad quality component.