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Message ID: 1832     Entry time: Wed Nov 27 23:45:29 2019
Author: Duo 
Type: DailyProgress 
Subject: Noisemon Debug Progress 

I found that two of the channels misbehaves after the board runs for a couple hours. Turning the power off and back on returns the circuit to normal functionality.

I sent 100 counts amplitude 10Hz sine into the board.

  • I saw channel 4 has some bad behavior - about 3V of offset with a lot of noise and one spike goes up to saturation.

Then I switched power off and back on. It worked normally. I increase amplitude to 2500, same as Carl's 10000. It worked normally as well. However, when I came back after a couple hours,

  • I saw two channels (1&4) saturates about 4 times a second. The other two still ok. (attachment 1)

 Then I turned power off and on again. I got attachment 2 - normal behavior again.

Attachment 1: saturating.pdf  21 kB  | Hide | Hide all
Attachment 2: AfterRestart.pdf  38 kB  | Hide | Hide all
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