<div dir="ltr">To AVC jde nekde v menu vypnout...</div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br> <table style="border-top:1px solid #d3d4de">
<tr>
<td style="width:55px;padding-top:18px"><a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail" target="_blank"><img src="https://ipmcdn.avast.com/images/icons/icon-envelope-tick-round-orange-animated-no-repeat-v1.gif" alt="" width="46" height="29" style="width: 46px; height: 29px;"></a></td>
<td style="width:470px;padding-top:17px;color:#41424e;font-size:13px;font-family:Arial,Helvetica,sans-serif;line-height:18px">Bez virů. <a href="https://www.avast.com/sig-email?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail" target="_blank" style="color:#4453ea">www.avast.com</a> </td>
</tr>
</table>
<a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"></a></div><div class="gmail_extra"><br><div class="gmail_quote">Dne 10. května 2018 12:09 Ladislav Vaiz <span dir="ltr"><<a href="mailto:spam@nagano.cz" target="_blank">spam@nagano.cz</a>></span> napsal(a):<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Hádal bych na vlic AVC v donglu.<br>
L.<br>
<br>
Dne 10.05.2018 v 11:35 Jan Smrz napsal(a):<br>
<blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Zdravim,<br>
<br>
pouzivate nekdo program rtl_power zbaliku utilit k RTL-SDR (<a href="https://github.com/keenerd/rtl-sdr/blob/master/src/rtl_power.c" rel="noreferrer" target="_blank">https://github.com/keenerd/rt<wbr>l-sdr/blob/master/src/rtl_powe<wbr>r.c</a>)? Rad bych to pouzival jako jednoduchy spektralni analyzator. Problem je vsak v tom, ze uroven signalu se meni podle nastaveni velikosti frekvencniho kroku (t.j. podle delky provadene FFT). Koukam do zdrojoveho kodu, ale nejak nemohu najit, kde je problem.<br>
<br>
Jestli koukam dobre, tak pouzity algoritmus FFT uz normalizuje 1/N, pote se jen udela prumer z vykonu a prevede dB. Experimentalne jsem overil, ze pozadovane urovne se dosahne roznasobenim vykonoveho prumeru N (poctem binu).<br>
<br>
Nasel jsem jen, ze se tam podle me spatne prevadi z fix point aritmetiky na real, kdy vysledek by mel podelit 32768.<br>
<br>
<br>
J.S. <br>
</blockquote>
<br>
<br>
______________________________<wbr>_________________<br>
HW-list mailing list - sponsored by <a href="http://www.HW.cz" rel="noreferrer" target="_blank">www.HW.cz</a><br>
<a href="mailto:Hw-list@list.hw.cz" target="_blank">Hw-list@list.hw.cz</a><br>
<a href="http://list.hw.cz/mailman/listinfo/hw-list" rel="noreferrer" target="_blank">http://list.hw.cz/mailman/list<wbr>info/hw-list</a><br>
</blockquote></div><br></div>