Maximum input sensitivity

Discussion in 'Homework Help' started by krogerson2, Jan 16, 2009.

  1. krogerson2

    Thread Starter Member

    Jan 8, 2009
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    0
    a reciever has a dynamic range of 81dB and a .55nW sensitivity what is the maximum allowable input signal.

    Help i need a formula to figure this out!!
     
  2. mik3

    Senior Member

    Feb 4, 2008
    4,846
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    What is meant by dynamic range?
     
  3. krogerson2

    Thread Starter Member

    Jan 8, 2009
    24
    0
    that is exactly what the question in the book says the answer is 0.0692W but i need to know how to get to that point
     
  4. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    I don't know but make a search in google for "receiver dynamic range" and you will find some answers.
     
  5. KL7AJ

    AAC Fanatic!

    Nov 4, 2008
    2,039
    287
    Howdy:

    Dynamic range is simply the ratio between the minimum detectable signal and saturation. (See the ARRL Handbook for more detail on this than you probably care to know!)


    Since DB is a ratio...you simply need to find out what 81 dB above .55nW is.

    Now you know.

    eric
     
  6. mik3

    Senior Member

    Feb 4, 2008
    4,846
    63
    According to the explanation of KL7AJ:

    dynamic range=saturation signal/minimum detectable signal

    Convert 81dB in a normal number, say A, and then multiply A by 0.55nW to get the maximum input Watts allowed.
     
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