I am doing the dft analysis to an ideal sinwave using the calculator, I use the conservative to run the tran analysis,but I get a result of only 55db for an ideal sinwave.
So can anyone tell me what's wrong with my simulation, what is needed to be set in the spectre ? Thank you very much.
the sampling frequency i used was 200M, and the frequency of the sinwave was 80.2734375M, I analysis 1024 points.
Ideal sinwave has only one tone in the spectrum. Does your 56dB or 100dB represents the tone's amplitude? Or a minus value represents other frequency noise?