+1 db peaks either side of XO freq.??

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I have Circuit Maker Student version. I was mucking around with some XO circuits and noticed that on a second order XO the simulation shows +1 db increase either side of the XO frequency. This lasts for a few hundred Hz or so. Is this possible do to resonances or something or bad choice of caps and coils. Or is it just a querk of Circuit Maker.



Any help??

Thanks
Paul
 
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