PNoise analysis port instance problem

[gunturikishore]

Hi,

Anybody working in the Spectre RF Pnoise analysis?? Actually the port instance of the Analysis is giving a i/p which is double of the acual specifeid amplitude. Is it having any consequence on the calculate Noise Figure through Pnoise analysis?? My circuit which is a Subharmonic pumped Down conversion circuit is giving about a 20dB of the NF which is double than the expected? an naybody help me in this regard.

Thanks in advance for any suggestions.

 

[field_catcher]

Be careful about the SSB (single side band) and DSB (double side band). There are exactly 3dB apart. Verify which one you are calculating.