Monday, September 09, 2013

Gain-Exposure Drift Mystery Explained

Albert Theuwissen has selected the right answer on the gain-exposure mystery. The reason for the drift was LED light source variation in time.

3 comments:

  1. This is indeed a stupud story. How can we use AC rectified LED light source for photoelectrical measurement?

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    Replies
    1. My understanding is that it goes through a regulated DC supply. But, probably, the supply quality is not good enough...

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  2. Vladimir, your understanding is correct. The basic lesson to take away is the powerful diagnostic tool of doing noise measurement.

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