User`s guide

Creating Noise-Spectrum Plots
Noise Spect ru m P lot Se tting s (C onti n u ed )
Action
Command
Change am plitude scale
between linear and
logarithmic.
Select Style > Linear amplitude scale or
Style > Log amplitude scale.
(Multiple-output
system only)
Select an input-output
pair to view the noise
spectrum corresponding
to those channels.
Note You cannot view
cross spectra between
different outputs.
SelecttheoutputbynameintheChannel menu.
How to Plot the Noise Spectrum at the Command Line
You can plot the frequency-response of the noise model.
First, select the portio n of the model object that corresponds to the noise
model H. For example, to select the noise model in the mo de l obje ct
m,type
the following command:
m_noise=m('noise')
Tip You can abbreviate the command to m_noise=m('n').
To plot the frequency -re spo nse of the noise model, use the bode command:
bode(m_noise)
To determine if your estimated noise model is good enough, you can compare
the f requency-response of the estimated noise-model H to the estimated
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