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Tutorial B2 Viewing Instruction Power Differences

35 bytes added, 15:21, 19 May 2017
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<li>Under the ''Trigger Pins'' unselect the ''Front Panel A'' as an option, and select ''Target IO4 (Trigger Line)''. This will mean only the trigger pin coming from the AVR target is used to trigger the capture.</li>
<li><p>In the same area, select the ''Clock Source'' as being from ''Target IO-IN''</p>
<p>[[File:cap303_ADC_Clock.png|image]]</p></li>
<li>You can monitor the ''Freq Counter'' option, which measures the frequency being used on the ''EXTCLK'' input. This should be 7.37 MHz, which is the oscillator on the multi-target board.</li>
<li>Change the ''ADC Clock'' ''source'' as being ''EXTCLK x4 via DCM''. This routes the external clock through a 4x multiplier, and routes it to the ADC.</li></ol></ol>
<li>Hit the '''Reset ADC DCM''' button.</li></ol>
[[File:cap504_ADC_Clock_2.pngPNG|image]]
<ol start="14" style="list-style-type: decimal;">
<li>The ''ADC Freq'' should show 29.5 MHz (which is 4x 7.37 MHz), and the ''DCM Locked'' checkbox __MUST__ be checked. If the ''DCM Locked'' checkbox is NOT checked, try hitting the ''Reset ADC DCM'' button again.</li>
<li><p>At this point you can hit the ''Capture 1'' button, and see if the system works! You should end up with a window looking like this:</p>
<p>[[File:cap605_Low_Gain.pngPNG|image|1250px]]</p><p>Whilst there is a waveform, you need to adjust the capture settings. There are two main settings of importance, the analog gain and number of samples to capture.</p></li></ol>
[[File:cap706_high_gain.pngPNG|image|1250px]]</ol>
<ol start="1516" style="list-style-type: decimal;"><li>Under ''Gain Setting'' set the ''Mode'' to ''high''. Increase the ''Gain Setting'' to about 25. You'll be able to adjust this further during experimentations, you may need to increase this depending on your hardware and target device. For the multi-target board with the CW1002 you will probably need to set this around 40 for example.</li>
<li>Under ''Trigger Setup'' set the ''Total Samples'' to ''500''.</li>
<li>Try a few more ''Capture 1'' traces, and you should see a 'zoomed-in' waveform.</li></ol>

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