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Import.
author Daniele Nicolodi <nicolodi@science.unitn.it>
date Wed, 23 Nov 2011 19:22:13 +0100
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1 <p>
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2 The LTPDA toolbox contains a class (<tt>pzmodel</tt>) for creating and using pole/zero models.
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3 The <it>pole/zero model helper GUI</it> allows the user to visualise the pole/zero model as it's
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4 being designed. It also allows the user to quickly see how the corresponding IIR filter
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5 (<tt>miir</tt> object) will look for different sample rates.
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6 </p>
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7 <p>
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8 To start the pole/zero model helper:
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9 <div class="fragment">
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10 <pre>
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11 >> pzmodel_helper
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12 </pre>
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13 </div>
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14 or click the appropriate button on the LTPDA Launch Bay.
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15 </p>
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16 <p>
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17 Once the GUI is loaded, you will see the following figure:
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18 </p>
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19 <br>
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20 <img src="images/pzmodel_helper.png" alt="pzmodel helper" border="3">
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21 <br>
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22 <p>
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23 You can add poles and zeros to the model by entering the frequency (and Q) in the edit boxes, then click
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24 <tt>Add pole</tt> or <tt>Add zero</tt> as appropriate. The response is then updated in the response axes.
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25 </p>
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26 <br>
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27 <img src="images/pzmodel_helper_eg1.png" alt="pzmodel helper" border="3">
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28 <br>
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