If Excitation Typebox is set to Sine, different configuration options become available.
l
Start Sine Freq: The Sine sweep test will begin at this frequency. The start frequency must be greater
than zero and less than the end sine frequency. Start Sine Freq is only visible and applicable to Sine
measurements.
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End Sine Freq: The Sine sweep test will end at this frequency. The end frequency must be less than or
equal to 8,000, and more than the sine start frequency. End Sine Freq is only visible and applicable in
Sine measurements
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Sine Step %: This box sets the sine step size. The sine sweep is discrete, not continuous. Each
frequency is a multiple of the previous. For example, if the first frequency was 1 and the step size was
6%, the second frequency would be 1 * 1.06 = 1.06 Hz, the third frequency would be 1.06 * 1.06 = 1.12
Hz. This continues until the current frequency exceeds the End Sine Frequency value. Sine Step % is
only visible and applicable in Sine measurements
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Current Freq: This field displays the current frequency of the sine sweep . Current Freq is only visible
and applicable in Sine measurements
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Turn Sine On: This button allows the user to excite the system at a single sine frequency. When this but-
ton is pressed, it grays out boxes that do not apply. You may change the sine frequency and amplitude.
To stop the sine excitation, click Turn Sine Off. Turn Sine On is only visible and applicable in Sine
measurements.
14.3.4.4 Plot Options
By default, only the Closed Loop plot is selected. You can control which of these responses are displayed on the
Bode plot by checking or unchecking the Plot Plant, Plot ClosedLoop, Plot Open Loop, Plot Controller, and
Plot Coherence checkboxes shown.
AKD User Guide | 14 Tuning Your System
Kollmorgen | December 2010 157
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