Transient Analysis Noise Syntax

Transient Analysis Noise Syntax

To enable transient noise analysis, the .TRAN statement takes additional optional arguments.

.TRANstepstoptime
+ NOISEFMAX=val
+ NOISESCALE=val
+ NOISESEED=val
+ NOISEFMIN=val

**Table 2: Transient Noise Arguments**
Argument	Description	Unit	Default
NOISEFMAX	The highest frequency to analyze for pseudorandom noise. Must be non-zero to enable transient noise analysis. Maximum transient timestep is set to 1/NOISEFMAX.	Hz	0
NOISESCALE	Scale factor	None	1
NOISESEED	Random number seed. Using the same seed generates the same set of random values	None	None
NOISEFMIN	Lowest frequency to analyze for noise. Under NOISEFMIN, noise power density is constant. 1/NOISEFMIN must be less than the transient analysis stoptime.	Hz	NOISEFMAX
NOISESTART	Noise start time	Second	0