I am trying to use the Analog Discovery oscilloscope to measure voltages, and I don't know what to make of an apparent exponential decay on the display. Below is a reading of what should be a 5 V peak square wave with 10% duty cycle. Can anyone explain why the value only reaches its peak for an instant, then starts to decay? Also, where the square wave voltage drops from +5V back to 0V, the scope sees a negative voltage spike. I am really baffled by this behavior, as it seems to happen regardless of the signal being measured. For example, I also attempted to measure DC voltages, and the scope only briefly registered the nominal DC voltage before the value decayed to 0V. I'm hoping it is only due to a setting in the program. Please let me know if I am missing something.
Question
Kfid
Hi all,
I am trying to use the Analog Discovery oscilloscope to measure voltages, and I don't know what to make of an apparent exponential decay on the display. Below is a reading of what should be a 5 V peak square wave with 10% duty cycle. Can anyone explain why the value only reaches its peak for an instant, then starts to decay? Also, where the square wave voltage drops from +5V back to 0V, the scope sees a negative voltage spike. I am really baffled by this behavior, as it seems to happen regardless of the signal being measured. For example, I also attempted to measure DC voltages, and the scope only briefly registered the nominal DC voltage before the value decayed to 0V. I'm hoping it is only due to a setting in the program. Please let me know if I am missing something.
Link to comment
Share on other sites
2 answers to this question
Recommended Posts
Archived
This topic is now archived and is closed to further replies.