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Satellite TV receivers & systems support forums
Fringe Reception General
Where do I place my LNA?
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<blockquote data-quote="satelliteman" data-source="post: 548728" data-attributes="member: 255812"><p>The reason you have a higher signal level is because the amplifier has a gain in dB and this will increase the incoming signal (dBuV). </p><p>However, you have most likely introduced more noise within the carrier and now have a poor CNR. </p><p></p><p>Line amplifiers will not help on a short runs as explained.</p><p></p><p>Having a gain of some 17dB on such as short cable run, caution has to be taken not to over drive the receiver with signals out of it's operating window.</p><p></p><p>The only way to increase signal on a short run is to use a larger dish for a better CNR OR an LNb with a lower noise figure.</p></blockquote><p></p>
[QUOTE="satelliteman, post: 548728, member: 255812"] The reason you have a higher signal level is because the amplifier has a gain in dB and this will increase the incoming signal (dBuV). However, you have most likely introduced more noise within the carrier and now have a poor CNR. Line amplifiers will not help on a short runs as explained. Having a gain of some 17dB on such as short cable run, caution has to be taken not to over drive the receiver with signals out of it's operating window. The only way to increase signal on a short run is to use a larger dish for a better CNR OR an LNb with a lower noise figure. [/QUOTE]
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Fringe Reception General
Where do I place my LNA?
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