Main Content

The quickest way to manipulate views in the **Linear System Analyzer** is use the
right-click menu. You can access several **Linear System Analyzer** controls and
options, including:

**Plot Type**— Changes the plot type**Systems**— Selects or deselects any of the models loaded in the**Linear System Analyzer****Characteristics**— Displays key response characteristics and parameters**Grid**— Adds grids to your plot**Properties**— Opens the**Property Editor**, where you can customize plot attributes

In addition to right-click menus, all response plots include data markers. These allow you to scan the plot data, identify key data, and determine the source system for a given plot.

The **Characteristics** menu changes for each plot response
type. Characteristics refers to response plot information, such as peak response, or, in
some cases, rise time, and settling time.

The next sections describe the menu items for each of the eight plot types.

**Step** plots the model's response to a step input.

You can display the following information in the step response:

**Peak Response**— The largest deviation from the steady-state value of the step response**Settling Time**— The time required for the step response to decline and stay at 5% of its final value**Rise Time**— The time require for the step response to rise from 10% to 90% of its final value**Steady-State**— The final value for the step response**Note**You can change the definitions of settling time and rise time using the

**Options**pane of the Toolbox Preferences Editor, the Linear System Analyzer Preferences Editor, or the Property editor.

**Impulse Response** plots the model's response to an impulse.

The **Linear System Analyzer** can display the following information in the
impulse response:

**Peak Response**— The maximum positive deviation from the steady-state value of the impulse response**Settling Time**— The time required for the step response to decline and stay at 5% of its final value

**Bode** plots the open-loop Bode phase and magnitude
diagrams for the model.

The **Linear System Analyzer** can display the following information in the
Bode diagram:

**Peak Response**— The maximum value of the Bode magnitude plot over the specified region**Stability Margins (Minimum Crossing)**— The minimum phase and gain margins. The gain margin is defined to the gain (in dB) when the phase first crosses -180°. The phase margin is the distance, in degrees, of the phase from -180° when the gain magnitude is 0 dB.**Stability Margins (All Crossings)**— Display all stability margins

**Bode Magnitude** plots the Bode magnitude diagram for
the model.

The **Linear System Analyzer** can display the following information in the
Bode magnitude diagram:

**Peak Response**, which is the maximum value of the Bode magnitude in decibels (dB), over the specified range of the diagram.**Stability (Minimum Crossing)**— The minimum gain margins. The gain margin is defined to the gain (in dB) when the phase first crosses -180°.**Stability (All Crossings)**— Display all gain stability margins

**Nyquist** plots the Nyquist diagram for the
model.

The **Linear System Analyzer** can display the following types of information
in the Nyquist diagram:

**Peak Response**— The maximum value of the Nyquist diagram over the specified region**Stability (Minimum Crossing)**— The minimum gain and phase margins for the Nyquist diagram. The gain margin is the distance from the origin to the phase crossover of the Nyquist curve. The phase crossover is where the curve meets the real axis. The phase margin is the angle subtended by the real axis and the gain crossover on the circle of radius 1.**Stability (All Crossings)**— Display all gain stability margins

**Nichols** plots the Nichols Chart for the model.

The **Linear System Analyzer** can display the following types of information
in the Nichols chart:

**Peak Response**— The maximum value of the Nichols chart in the plotted region.**Stability (Minimum Crossing)**— The minimum gain and phase margins for the Nichols chart.**Stability (All Crossings)**— Display all gain stability margins

Singular Values plots the singular values for the model.

The **Linear System Analyzer** can display the **Peak
Response**, which is the largest magnitude of the Singular Values curve over
the plotted region.

Pole/Zero plots the poles and zeros of the model with `x' for poles and `o' for zeros. I/O Pole/Zero plots the poles and zeros of I/O pairs.

There are no **Characteristics** available for pole-zero
plots.