<div dir="ltr">Ano, pan Zufa tam mel mit 10microWatt a ne 10miliWatt</div><div id="DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2"><br> <table style="border-top:1px solid #d3d4de">
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<a href="#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2" width="1" height="1"></a></div><br><div class="gmail_quote"><div dir="ltr">út 8. 1. 2019 v 22:34 odesílatel Josef Zeman <<a href="mailto:jozem@volny.cz">jozem@volny.cz</a>> napsal:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
<div lang="EN-US">Zdravím,<br><br>-20 dBm je 10 mW?? Od kdy? Když mW, tak 0,01. 0 dBm je odjakživa miliwatt.<br><br>Zeman<br><br><div class="gmail_quote">8. ledna 2019 8:14:44 SEČ, Zuffa Jan <<a href="mailto:ZuffaJ@cgc.sk" target="_blank">ZuffaJ@cgc.sk</a>> napsal:<blockquote class="gmail_quote" style="margin:0pt 0pt 0pt 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Zda sa ze to sedi<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">FPSL (3m/107MHz) = -12dB<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">15dBmV + 12dB = 27dBmV = -20dBm = 10mW
<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">Pri zisku obidvoch anten = 0dB<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)">j.<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11pt;font-family:Calibri,sans-serif;color:rgb(31,73,125)"><u></u> <u></u></span></p>
<p class="MsoNormal"><b><span style="font-size:10pt;font-family:Tahoma,sans-serif">From:</span></b><span style="font-size:10pt;font-family:Tahoma,sans-serif"> Hw-list [mailto:<a href="mailto:hw-list-bounces@list.hw.cz" target="_blank">hw-list-bounces@list.hw.cz</a>]
<b>On Behalf Of </b>Jan Kuba<br>
<b>Sent:</b> Tuesday, January 08, 2019 1:12 AM<br>
<b>To:</b> HW-news<br>
<b>Subject:</b> Re: FM transmitter - výkon<u></u><u></u></span></p>
<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Tak jsem pustil spektrák, do vstupu dal metr drátu a odměřil VKV spektrum vysílačů v "rozumných" dBm.<u></u><u></u></p>
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<p class="MsoNormal">nejsilnější je -32dBm , jedná se o asi 1,5km vzdálený vysílač s ERP 200W.<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">Neboli to sedí:<u></u><u></u></p>
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<p class="MsoNormal">Výkonová úroveň (power level) Ip = -32dBm (=dBmW) <u></u><u></u></p>
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<p class="MsoNormal">Napěťová úroveň (voltage level) Iv = 15dBm (=dBmV) <u></u><u></u></p>
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<p class="MsoNormal">Napěťová úroveň (voltage level) Iv = 75dBuV<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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<p class="MsoNormal">( <a href="https://www.qsl.net/ok1cfp/ok1cfp-prepocty-decibel-db-dbm-dbuv-dbuw-decibel-conversions.htm" target="_blank">https://www.qsl.net/ok1cfp/ok1cfp-prepocty-decibel-db-dbm-dbuv-dbuw-decibel-conversions.htm</a> )<u></u><u></u></p>
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<p class="MsoNormal"><u></u> <u></u></p>
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</blockquote></div><br>-- <br>Odesláno aplikací K-9 Mail ze systému Android. Omluvte prosím moji stručnost.</div>_______________________________________________<br>
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