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<div>Steve, if I recall that event correctly weren't there a lot of spikes in the FFT? I don't remember whether or not the real space image looked this obviously bad. </div>
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Jaap
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<div>Jacob Brink <span style="font-size: 13pt;">Ph.D.</span></div>
<div><span style="font-size: 13pt;">TEM Product Manager Life Sciences</span></div>
<div><span style="font-size: 13pt;">JEOL USA, Inc., Peabody MA 01960</span></div>
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<div>Sent from mobile device. Please excuse typos and this reply's brevity as I'm using all thumbs to type :-)</div>
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On Feb 4, 2016, at 7:27 PM, Ludtke, Steven J <<a href="mailto:sludtke@bcm.edu">sludtke@bcm.edu</a>> wrote:<br>
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<div><span>Electrical noise due to a loose/bad cable? I seem to recall a case where we had a bad cable connection due to being periodically "bumped" or somesuch. This is a bit more extreme than I recall seeing, but certainly if there is a grounding issue or
a bad cable all sorts of electrical badness can occur. If you know the readout rate of the detector you can estimate the frequency of the noise you're seeing.</span><br>
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<span>Of course it could be something else :^)</span><br>
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<span>----------------------------------------------------------------------------</span><br>
<span>Steven Ludtke, Ph.D.</span><br>
<span>Professor, Dept. of Biochemistry and Mol. Biol. Those who do</span><br>
<span>Co-Director National Center For Macromolecular Imaging ARE</span><br>
<span>Baylor College of Medicine The converse</span><br>
<span><a href="mailto:sludtke@bcm.edu">sludtke@bcm.edu</a> -or- <a href="mailto:stevel@alumni.caltech.edu">stevel@alumni.caltech.edu</a> also applies</span><br>
<span><a href="http://ncmi.bcm.edu/~stevel">http://ncmi.bcm.edu/~stevel</a></span><br>
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<blockquote type="cite"><span>On Feb 4, 2016, at 6:08 PM, David Gene Morgan <<a href="mailto:dagmorga@indiana.edu">dagmorga@indiana.edu</a>> wrote:</span><br>
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<blockquote type="cite"><span>Hi,</span><br>
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<blockquote type="cite"><span> Someone pointed out that the image I attached to my original post was not passed by the mail server. You can see that image at:</span><br>
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<blockquote type="cite"><span> <a href="http://iubemcenter.indiana.edu/oddImageFromUltrascan890.html">http://iubemcenter.indiana.edu/oddImageFromUltrascan890.html</a></span><br>
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<blockquote type="cite"><span>-- </span><br>
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<blockquote type="cite"><span> David Gene Morgan</span><br>
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<blockquote type="cite"><span> Electron Microscopy Center</span><br>
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