VCO jitter measurement in transient analysis and pnoise analysis

Hai sir

          I am simulating  active inductor VCO with free running frequency of 5GHz in 65nm technology.

          version IC 6.1.3

          using transient analysis (enabled transient noise) the measurement of period jitter is 400ps

          In tran analysis the noise setttings,  noiseseed 1, noisefmax 2.5G and didn't set noisefmin

 Using pnoise analysis in jitter mode(at IMHz offset phase noise -75dBC/HZ) i am getting JC is 125fs & for different K values JCC (K=1) is 156fs and JCC(K=100) is 2.2ps, JCC(K=15000) is 88.2ps

PSS (number of harmonics 10)

PNOISE(number of sidebands 10)

1) Which of them is the right method.

2) For jitter measuremnet  which parameter i have to take JC or JCC

2) For given frequency 5 GHz what must be the value of K i have to choose to measure the jitter.

3) how to interpret phase noise of -75dBC/Hz in terms of jitter

Thank you

satya