<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"></head><body dir="auto"><div dir="ltr"></div><div dir="ltr">Jj, odpor R11 z naseho podniku Katodá Olomóc, to je previt :)</div><div dir="ltr"><br>On 7 Nov 2018, at 07:52, Čihák Martin <<a href="mailto:cihak@dkv.cd.cz">cihak@dkv.cd.cz</a>> wrote:<br><br></div><blockquote type="cite"><div dir="ltr"><meta http-equiv="Content-Type" content="text/html; charset=utf-8"><meta name="Generator" content="Microsoft Word 14 (filtered medium)"><style><!--
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</o:shapelayout></xml><![endif]--><div class="WordSection1"><p class="MsoNormal"><span style="color:#1F497D">Ale my se nebavíme o šumu odporu R1 ale o šumu odporů R11 a R12 s hodnotami 220k a 1M jejichž šum už hente prdítko nejspíš odměří </span><span style="font-family:Wingdings;color:#1F497D">J</span><span style="color:#1F497D">. Moje chyba kdy jsem osadil na místo R1 50k místo 50 ohmů způsobila to že byl vstup převodníku na vysoké impedanci takže chytal všechny šumy a rušení z okolí. Já to ale chybně přičítal vlivu R11 a R12 a proto jsem blbnul s těmi drahými odpory.<o:p></o:p></span></p><p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p><p class="MsoNormal"><span style="color:#1F497D"> Martin.<o:p></o:p></span></p><p class="MsoNormal"><span style="color:#1F497D"><o:p> </o:p></span></p><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Hw-list [<a href="mailto:hw-list-bounces@list.hw.cz">mailto:hw-list-bounces@list.hw.cz</a>] <b>On Behalf Of </b>Daniel Valuch<br><b>Sent:</b> Tuesday, November 6, 2018 4:34 PM<br><b>To:</b> HW-news<br><b>Subject:</b> Re: RF detektor<o:p></o:p></span></p></div></div><p class="MsoNormal"><o:p> </o:p></p><div><p class="MsoNormal">sumovy vykon pri izbovej teplote a 500MHz sirke pasma je okolo -87dBm. To hento prditko este neodmera, dynamicky rozsah tam zacina niekde na -70dBm a vyssie.<br>Problem bol zrejme niekde inde :-)<br><br><br>On 06/11/2018 16:25, Zuffa Jan wrote:<o:p></o:p></p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><p class="MsoNormal"><span style="color:#1F497D">Ano, </span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D">ale vykon v dBm ostava rovnaky cize</span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D">ten merak by mal vlastne ukazovat spravne :)</span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D">j.</span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p><div><div style="border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm"><p class="MsoNormal"><b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext">From:</span></b><span style="font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext"> Daniel Valuch [<a href="mailto:balu@k-net.fr">mailto:balu@k-net.fr</a>] <br><b>Sent:</b> Tuesday, November 06, 2018 4:21 PM<br><b>To:</b> HW-news; Zuffa Jan<br><b>Subject:</b> Re: RF detektor</span><o:p></o:p></p></div></div><p class="MsoNormal"> <o:p></o:p></p><div><p class="MsoNormal">ale hej, podla kTRB sumi 50k rezistor 1000x viacej ako 50R :-)<br><br><br>On 06/11/2018 15:56, Zuffa Jan wrote:<o:p></o:p></p></div><blockquote style="margin-top:5.0pt;margin-bottom:5.0pt"><p class="MsoNormal"><span style="color:#1F497D">Ale rozdiel o dva rady 2uV vs 200uV nemoze byt dany sumovymi vlastnostami odporu.</span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D">Tu pojde pravdepodobne o nejake spatne vazby alebo skor pravdepodobne nevhodne</span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D">navrhnute rozlozenie zemniacych sluciek na dps. U takto nizkych urovniach je pouzitie</span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D">4 vrstvych dps nutnost. Ale pristroj Vam funguje k plnej spokojnosti a to je to najdolezitejsie :)</span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D"> </span><o:p></o:p></p><p class="MsoNormal"><span style="color:#1F497D">j.</span><o:p></o:p></p></blockquote></blockquote><p class="MsoNormal"><span style="font-size:12.0pt;font-family:"Times New Roman","serif""><o:p> </o:p></span></p></div></div></blockquote><blockquote type="cite"><div dir="ltr"><span>_______________________________________________</span><br><span>HW-list mailing list - sponsored by <a href="http://www.HW.cz">www.HW.cz</a></span><br><span><a href="mailto:Hw-list@list.hw.cz">Hw-list@list.hw.cz</a></span><br><span><a href="http://list.hw.cz/mailman/listinfo/hw-list">http://list.hw.cz/mailman/listinfo/hw-list</a></span><br></div></blockquote></body></html>