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    Measurement of Noise Figure of LNA

    IN my lab ,there is a PNA N5247 without options 029, if i want to measure the NF ,i must buy options 029,but i have found that the options 029 is too expensive to me .so i must find other method to measure the noise figure ,there is a N8975A in my lab too, but its maximum frequency is 26.5G ,so i must add blockdown converter ,N8975AZ-K40/K50 is a blockdown converter for N8975A by agilent ,but it is also expensive . more than $50.000 . our lab cann`t afford this . i want to measure the NF using money blow $5.000. so do you have any suggestion for me to achieve this .thanks

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  2. #2
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    Re: Measurement of Noise Figure of LNA

    Just quoting model numbers without even a manufacturers name is of no use to most members of this forum. What you need is a CW signal source with a calibrated attenuator, a receiver with an IF output and a RMS power meter that is accurate at IF and an input termination resistor. So what have you not got?
    Frank



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  3. #3
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    Re: Measurement of Noise Figure of LNA

    Quote Originally Posted by eason.RFIC View Post
    IN my lab ,there is a PNA N5247 without options 029
    Why are you starting another thread to ask this. You have asked the same question at

    https://www.edaboard.com/thread264570.html

    Dave

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    Quote Originally Posted by chuckey View Post
    Just quoting model numbers without even a manufacturers name is of no use to most members of this forum. What you need is a CW signal source with a calibrated attenuator, a receiver with an IF output and a RMS power meter that is accurate at IF and an input termination resistor. So what have you not got?
    Frank
    RMS power is a useless entity. One can mathematically compute the RMS value of any function, but in the case of power it is pointless to do so, since the result has no particular use. In general, it will not have the same heating effect as the mean value of power. In contrast the mean power is a useful quantity.

    Dave



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