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How to clip the calculator dft() output ?

lahsivece

Hi ,

I am trying to clip the calculator dft function output to extract dft peak value  in that frequency range. Is it possible ? If yes , how to go ahead with this .

How to get  y value at a particular frequency  in the dft plot in ocean?

Please advise.

Regards

Vishal

 

Parents

  • Hi Andrew,

    Thanks for the hint.

    value() did not work . May be I am using it wrong.  I will look into the syntax and try it out again for dft() output.

    But using clip() on dft() output and ymax() search worked fine. ymax() can not handle complex numbers.

    dft()  output is a complex number and hence need to find peak in the real part and peak in the imaginary part.

    Then take the magnitude of two outputs.

    vop=value(getData("VOUT") 'vamp 10m)

    vop_dft=dft( vop 500n 1.9u 4096 "Rectangular")

    clip_vop_dft=clip(vop_dft 1.190G 1.192G) ;;; My peak is located at 1.191G

    ymax_real=ymax(real(clip_vop_dft))

    ymax_imag=ymax(imag(clip_vop_dft))

    ymax_tot=sqrt(ymax_real*ymax_real + ymax_imag*ymax_imag)

    Any comments on the above

    Regards,

    Vishal

Reply

  • Hi Andrew,

    Thanks for the hint.

    value() did not work . May be I am using it wrong.  I will look into the syntax and try it out again for dft() output.

    But using clip() on dft() output and ymax() search worked fine. ymax() can not handle complex numbers.

    dft()  output is a complex number and hence need to find peak in the real part and peak in the imaginary part.

    Then take the magnitude of two outputs.

    vop=value(getData("VOUT") 'vamp 10m)

    vop_dft=dft( vop 500n 1.9u 4096 "Rectangular")

    clip_vop_dft=clip(vop_dft 1.190G 1.192G) ;;; My peak is located at 1.191G

    ymax_real=ymax(real(clip_vop_dft))

    ymax_imag=ymax(imag(clip_vop_dft))

    ymax_tot=sqrt(ymax_real*ymax_real + ymax_imag*ymax_imag)

    Any comments on the above

    Regards,

    Vishal

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