Raja,

  No you don't need a transient noise simulation. A transient simulation
will give you the deterministic jitter. You will need a PRBS source and
your channel model for DJ. You need transient noise if you want to
simulate random jitter, RJ.

                                                                 Best Regards,

                                                                    Sheldon

Raja,

 Usually, you only need to set noisefmax when simulating white
noise and noisefmax/noisefmin when simulating 1/f and white
noise.

                                                            Best Regards,

                                                               Sheldon

a. Noise seed, seed for the noise generator, not really required
b. Noise fmax, sets the maximum frequency of the noise
c. Noise scale, probably not required. scales the noise up to
                     reduce the effect of numerical noise on the calculation
d. Noise fmin, used if you want to model 1/f noise, sets the
                    minimum frequency for the 1/f noise generator
e. Noise tmin, the inverse of noisefmax, sets the minimum time
                    step size