<div dir="ltr">Hi Craig,<div><br></div><div>At first you would see no difference as only 21 coefficients would be loaded but the block expects 41. If you sent your 21 coefficients again, then your filter output would look distorted as the second set of coefficients would complete the expected 41. Basically, don't do this. :-)</div><div><br></div><div><br></div><div><br></div><div>Jonathon</div></div><div class="gmail_extra"><br><div class="gmail_quote">On Wed, Mar 23, 2016 at 7:47 PM, Swanson, Craig <span dir="ltr"><<a href="mailto:Craig.Swanson@gtri.gatech.edu" target="_blank">Craig.Swanson@gtri.gatech.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">





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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Jonathon,<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Yes, I modified the axi_fir.xci file to have 41 coefficients.  So I just wanted to verify the scenario if the .bit file specified 41 coefficients and the python
 file generated in GRC specified 21, what would happen?<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Craig<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:14.0pt;color:#1f497d">Craig F. Swanson<u></u><u></u></span></b></p>
<p class="MsoNormal"><b><span style="font-family:"Calibri",sans-serif;color:#1f497d">Research Engineer II<u></u><u></u></span></b></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1f497d">Cell: <a href="tel:770-298-9156" value="+17702989156" target="_blank">770-298-9156</a><u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri",sans-serif"> Jonathon Pendlum [mailto:<a href="mailto:jonathon.pendlum@ettus.com" target="_blank">jonathon.pendlum@ettus.com</a>]
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<b>Sent:</b> Wednesday, March 23, 2016 10:36 PM<br>
<b>To:</b> Swanson, Craig <<a href="mailto:Craig.Swanson@gtri.gatech.edu" target="_blank">Craig.Swanson@gtri.gatech.edu</a>><br>
<b>Cc:</b> <a href="mailto:usrp-users@lists.ettus.com" target="_blank">usrp-users@lists.ettus.com</a><br>
<b>Subject:</b> Re: How do I change the number of taps and tap coefficients for the noc_block_fir_filter?<u></u><u></u></span></p>
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<p class="MsoNormal">I think you figured this out (per another thread you posted) but in case you didn't, you need to generate a new .xci file for the AXI FIR filter. You can use the Vivado GUI to do that.<u></u><u></u></p>
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<p class="MsoNormal">Jonathon<u></u><u></u></p>
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<p class="MsoNormal">On Wed, Mar 23, 2016 at 1:47 PM, Swanson, Craig <<a href="mailto:Craig.Swanson@gtri.gatech.edu" target="_blank">Craig.Swanson@gtri.gatech.edu</a>> wrote:<u></u><u></u></p>
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<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">​Jonathon,<u></u><u></u></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">I remember you reviewed how to do this at GRCon15, but I don't remember.<u></u><u></u></span></p>
<p style="background:white"><span style="font-family:"Calibri",sans-serif;color:black">Craig<u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><b><span style="font-size:14.5pt;font-family:"Brush Script MT";color:black">Craig F. Swanson</span></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><b><i><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black">Research Engineer II</span></i></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><b><i><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black">Information and Communications Laboratory</span></i></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><b><i><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black">Communications, Systems, and Spectrum Division</span></i></b><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><i><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black">Room 560<br>
250 14th St NW</span></i><span style="font-size:13.5pt;font-family:"Segoe UI",sans-serif;color:black"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><i><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black">Atlanta, GA 30318</span></i><span style="font-size:13.5pt;font-family:"Segoe UI",sans-serif;color:black"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><i><span style="font-size:10.0pt;font-family:"Calibri",sans-serif;color:black">Cell:
<a href="tel:770.298.9156" target="_blank">770.298.9156</a></span></i><span style="font-size:13.5pt;font-family:"Segoe UI",sans-serif;color:black"><u></u><u></u></span></p>
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<p class="MsoNormal" style="background:white"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><a href="https://mail.gtri.gatech.edu/owa/redir.aspx?C=c20925f2f0af4dd29329ddf0701ecfff&URL=http%3a%2f%2fwww.gtri.gatech.edu%2f" target="_blank"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif">http://www.gtri.gatech.edu</span></a></span><span style="font-size:8.5pt;font-family:"Arial",sans-serif;color:black;background:white"> </span><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><u></u><u></u></span></p>
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