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Thread: Electronic gain and IC capture gain

  1. #1
    Join Date
    Mar 2012
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    3

    Electronic gain and IC capture gain

    Hi I have a question concerning gain settings in IC capture.
    Is there a a general rule to know the value of the electronic gain (in dB) from the gain
    parameter setted from Device properties in IC Capture?
    Thanks
    Lorenzo

  2. #2
    Join Date
    Jul 2010
    Location
    Bremen, Germany
    Posts
    92

    Re: Electronic gain and IC capture gain

    Hello lorenzo_V,

    the ratio of the shown gain value to the electronic gain value in dB varies with the type of camera. What cameras do you use?
    Best regards
    Michael

  3. #3
    Join Date
    Jan 2003
    Location
    Bremen, Germany
    Posts
    4,250

    Re: Electronic gain and IC capture gain

    Lorenzo,

    most of our CCD cameras have the gain starting at 0 ending a 36 db. The gain rises linear with the value set.
    Best regards
    Stefan
    IC Imaging Control Support

  4. #4
    Join Date
    Mar 2012
    Posts
    3

    Re: Electronic gain and IC capture gain

    Michael,
    I use a DMK21BF04 electronic gain (0-36 dB) gain value 260-1023.
    So if the relation is linear between the dB and the gain value I've to multiply the value for the ratio 36/764 to obtain the gain in dB.
    Is it correct?
    Best regards
    Lorenzo

  5. #5
    Join Date
    Jan 2003
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    Bremen, Germany
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    Re: Electronic gain and IC capture gain

    Yes, I think so. Please see the attached image

    Attached Images Attached Images
    Last edited by Stefan Geissler; April 2, 2012 at 09:12:43.
    Best regards
    Stefan
    IC Imaging Control Support

  6. #6
    Join Date
    Mar 2012
    Posts
    3

    Re: Electronic gain and IC capture gain

    Stefan,
    I'm a little bit confused having a look at the graph. I think that @ 0 dB the abscissa (register value) has to be 260, doesn't it?
    Best regards
    Lorenzo

  7. #7
    Join Date
    Jan 2003
    Location
    Bremen, Germany
    Posts
    4,250

    Re: Electronic gain and IC capture gain

    Lorenzo,

    what you see is an excerpt of the documentation of the camera engineers. A little gain must be a minimum setting, which is 260, in order to see an image at all. Therefore, the minimum value is 260, which seems to be 8db in the camera electronics.
    Best regards
    Stefan
    IC Imaging Control Support

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