noise
Do a noise analysis
General form
noise V(output [,ref]) src ( DEC | LIN | OCT ) pts fstart fstop [pts_per_summary]
Do a noise analysis of the current circuit, as a .NOISE line would. The arguments are the same as on the .NOISE line: the output node (and optional reference node), the independent source that is the noise input, the frequency sweep, and optionally how often to print a summary of each noise contribution.
The analysis makes two plots: the noise spectral densities, and the noise integrated over the frequency range. Use setplot to move between them.
Example
noise V(5) VIN DEC 10 1kHz 100MHz