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.
Posted by Vladimir Koifman at 20:54

3 comments:

  1. AnonymousSeptember 10, 2013 at 3:00 AM

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

    ReplyDelete
    Replies
    1. Vladimir KoifmanSeptember 10, 2013 at 7:16 AM

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

      Delete
  2. Albert TheuwissenSeptember 10, 2013 at 3:34 PM

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

    ReplyDelete

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