https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&feed=atom&action=history
Dvb constellation - Revision history
2024-03-28T17:38:12Z
Revision history for this page on the wiki
MediaWiki 1.39.6
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31992&oldid=prev
CityK: add some links
2013-05-12T22:08:03Z
<p>add some links</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 22:08, 12 May 2013</td>
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CityK
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31990&oldid=prev
Aospan: external links added
2013-05-12T08:11:04Z
<p>external links added</p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 08:11, 12 May 2013</td>
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<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td>
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Aospan
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31987&oldid=prev
Aospan at 18:25, 11 May 2013
2013-05-11T18:25:23Z
<p></p>
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<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 18:25, 11 May 2013</td>
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<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>http://stand.netup.tv/downloads/iq_constellation_v4l-utils.patch</div></td>
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<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>== Receiving I&Q data from DVB demodulator ==</div></td>
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Aospan
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31986&oldid=prev
Aospan at 17:53, 11 May 2013
2013-05-11T17:53:29Z
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<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam128_38db.png|QAM128 constellation (DVB-C)</div></td>
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Aospan
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31981&oldid=prev
Aospan at 17:19, 11 May 2013
2013-05-11T17:19:31Z
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<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam16_38db.png|QAM16 constellation</div></td>
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<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam16_38db.png|QAM16 constellation<ins style="font-weight: bold; text-decoration: none;"> (DVB-C)</ins></div></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam64_38db.png|QAM64 constellation</div></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam64_38db.png|QAM64 constellation<ins style="font-weight: bold; text-decoration: none;"> (DVB-C)</ins></div></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam128_38db.png|QAM128 constellation</div></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam128_38db.png|QAM128 constellation<ins style="font-weight: bold; text-decoration: none;"> (DVB-C)</ins></div></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam256_36db.png|QAM256 constellation</div></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam256_36db.png|QAM256 constellation<ins style="font-weight: bold; text-decoration: none;"> (DVB-C)</ins></div></td>
</tr>
<tr>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></gallery></div></td>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div></gallery></div></td>
</tr>
</table>
Aospan
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31980&oldid=prev
Aospan at 17:19, 11 May 2013
2013-05-11T17:19:05Z
<p></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:19, 11 May 2013</td>
</tr><tr>
<td colspan="2" class="diff-lineno">Line 28:</td>
<td colspan="2" class="diff-lineno">Line 28:</td>
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<tr>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>resulting image will be saved into iq_dvbc_qam256.png. Here is example of images received with [[NetUP_Dual_DVB_T_C_CI_RF|NetUP Dual DVB-T/C-CI RF]] and [[NetUP_Dual_DVB_S2_CI|NetUP Dual DVB S2 CI]] cards.</div></td>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>resulting image will be saved into iq_dvbc_qam256.png. Here is example of images received with [[NetUP_Dual_DVB_T_C_CI_RF|NetUP Dual DVB-T/C-CI RF]] and [[NetUP_Dual_DVB_S2_CI|NetUP Dual DVB S2 CI]] cards.</div></td>
</tr>
<tr>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><gallery></div></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Image</del>:Iq_dvbc_qam16_38db.png|QAM16 constellation<del style="font-weight: bold; text-decoration: none;"> on NetUP Dual DVB-T/C-CI card]]</del></div></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">File</ins>:Iq_dvbc_qam16_38db.png|QAM16 constellation</div></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><br /></td>
<td colspan="2" class="diff-empty diff-side-added"></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Image</del>:Iq_dvbc_qam64_38db.png|QAM64 constellation<del style="font-weight: bold; text-decoration: none;"> on NetUP Dual DVB-T/C-CI card]]</del></div></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">File</ins>:Iq_dvbc_qam64_38db.png|QAM64 constellation</div></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>File:Iq_dvbc_qam128_38db.png|QAM128 constellation</div></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><br /></td>
<td colspan="2" class="diff-empty diff-side-added"></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><del style="font-weight: bold; text-decoration: none;">[[Image</del>:<del style="font-weight: bold; text-decoration: none;">Iq_dvbc_qam128_38db</del>.png|<del style="font-weight: bold; text-decoration: none;">QAM128</del> constellation<del style="font-weight: bold; text-decoration: none;"> on NetUP Dual DVB-T/C-CI card]]</del></div></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><ins style="font-weight: bold; text-decoration: none;">File</ins>:<ins style="font-weight: bold; text-decoration: none;">Iq_dvbc_qam256_36db</ins>.png|<ins style="font-weight: bold; text-decoration: none;">QAM256</ins> constellation</div></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div></gallery></div></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><br /></td>
<td colspan="2" class="diff-empty diff-side-added"></td>
</tr>
<tr>
<td class="diff-marker" data-marker="−"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Iq_dvbc_qam256_36db.png|QAM256 constellation on NetUP Dual DVB-T/C-CI card]]</div></td>
<td colspan="2" class="diff-empty diff-side-added"></td>
</tr>
</table>
Aospan
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31979&oldid=prev
Aospan at 17:13, 11 May 2013
2013-05-11T17:13:28Z
<p></p>
<table style="background-color: #fff; color: #202122;" data-mw="interface">
<col class="diff-marker" />
<col class="diff-content" />
<col class="diff-marker" />
<col class="diff-content" />
<tr class="diff-title" lang="en">
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">← Older revision</td>
<td colspan="2" style="background-color: #fff; color: #202122; text-align: center;">Revision as of 17:13, 11 May 2013</td>
</tr><tr>
<td colspan="2" class="diff-lineno">Line 27:</td>
<td colspan="2" class="diff-lineno">Line 27:</td>
</tr>
<tr>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><br /></td>
</tr>
<tr>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>resulting image will be saved into iq_dvbc_qam256.png. Here is example of images received with [[NetUP_Dual_DVB_T_C_CI_RF|NetUP Dual DVB-T/C-CI RF]] and [[NetUP_Dual_DVB_S2_CI|NetUP Dual DVB S2 CI]] cards.</div></td>
<td class="diff-marker"></td>
<td style="background-color: #f8f9fa; color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>resulting image will be saved into iq_dvbc_qam256.png. Here is example of images received with [[NetUP_Dual_DVB_T_C_CI_RF|NetUP Dual DVB-T/C-CI RF]] and [[NetUP_Dual_DVB_S2_CI|NetUP Dual DVB S2 CI]] cards.</div></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Iq_dvbc_qam16_38db.png|QAM16 constellation on NetUP Dual DVB-T/C-CI card]]</div></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Iq_dvbc_qam64_38db.png|QAM64 constellation on NetUP Dual DVB-T/C-CI card]]</div></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Iq_dvbc_qam128_38db.png|QAM128 constellation on NetUP Dual DVB-T/C-CI card]]</div></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><br /></td>
</tr>
<tr>
<td colspan="2" class="diff-empty diff-side-deleted"></td>
<td class="diff-marker" data-marker="+"></td>
<td style="color: #202122; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>[[Image:Iq_dvbc_qam256_36db.png|QAM256 constellation on NetUP Dual DVB-T/C-CI card]]</div></td>
</tr>
</table>
Aospan
https://www.linuxtv.org/wiki/index.php?title=Dvb_constellation&diff=31974&oldid=prev
Aospan: Build DVB constellation in Linux
2013-05-11T17:06:27Z
<p>Build DVB constellation in Linux</p>
<p><b>New page</b></p><div>== Receiving I&Q data from DVB demodulator ==<br />
<br />
<pre><br />
dvb_const -f /dev/dvb/adapter0/frontend1 -o iq_dvbc_qam256.txt -p 100000<br />
</pre><br />
<br />
received data (100000 points) will be saved into iq_dvbc_qam256.txt file. File format is simple text csv. Example of received data:<br />
<br />
<pre><br />
-175,-45<br />
-46,110<br />
-241,-178<br />
176,11<br />
-50,173<br />
16,44<br />
</pre><br />
<br />
Values are signed. First I part, second Q part.<br />
<br />
== Visualization of received data ==<br />
<br />
'''dvb_const_plot''' utility build PNG image with constellation:<br />
<br />
<pre><br />
dvb_const_plot -i iq_dvbc_qam256.txt -o iq_dvbc_qam256.png -c "SNR=38dB QAM256" <br />
</pre><br />
<br />
resulting image will be saved into iq_dvbc_qam256.png. Here is example of images received with [[NetUP_Dual_DVB_T_C_CI_RF|NetUP Dual DVB-T/C-CI RF]] and [[NetUP_Dual_DVB_S2_CI|NetUP Dual DVB S2 CI]] cards.</div>
Aospan