ACWWong
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dBVrms is dB in reference to 1 Vrms. so if I have 1V amplitude sine wave signal (ie 1*cos(wt)), then Vrms=1/sqrt(2)=0.707=-3dBVrms
lo-rf isolation is measured in straight dB (a unitless ratio) NOT dBVrms. so if 1% of the LO voltage signal leaks to the RF port then one can say the LO to RF isolation is 40dB.
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