<br><br><div class="gmail_quote">On Thu, Jun 4, 2009 at 2:53 PM, Andrea Giuliano <span dir="ltr"><<a href="mailto:sarkiaponius@alice.it">sarkiaponius@alice.it</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
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Robert McNamara wrote:<br>
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On Thu, Jun 4, 2009 at 1:51 PM, Andrea Giuliano <<a href="mailto:sarkiaponius@alice.it" target="_blank">sarkiaponius@alice.it</a> <mailto:<a href="mailto:sarkiaponius@alice.it" target="_blank">sarkiaponius@alice.it</a>>> wrote:<br>
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I'm seeing horrible artifacts in my DVB-S recordings, even though<br>
MythTV says the signal strength is 99%<br>
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Signal strength isn't what you think it is. Signal strength is the strength of the electrical signal between the card and the LNB, *not* an indication of quality of the signal. More helpful for this is SNR (Signal to Noise Ratio) and Bit Error. Low SNR or high bit error means bad quality signal. Repoint the dish.<br>
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Dear Robert,</blockquote><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; ">
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thanks for your kind answer. Can you please give me reference values for SNR and Bit Error? I got 4.8 dB and 2000-3000 for them, depending on the channels. Actually, SNR seems to be constant, I mean it's alway 4.8 dB, while BE changes instead.</blockquote>
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Also, my dish works perfectly fine with my stand alone decoder (I have two cables from one dish), so I guess it's not its fault.</blockquote><blockquote class="gmail_quote" style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0.8ex; border-left-width: 1px; border-left-color: rgb(204, 204, 204); border-left-style: solid; padding-left: 1ex; ">
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Best regards.</blockquote><div><br></div><div>(Fixed top posting) </div><div><br></div><div>Hi Andrea,</div><div><br></div><div>Ideally, the BER should be 0 or extremely close to 0. Different tuner devices have different signal sensitivities and different decoders are more or less sensitive to errors in the stream. Both are likely problems for you. You will almost definitely need to point your dish more accurately. You can also check all your cable termination, the cables themselves, and any power inserters for the LNB.</div>
<div><br></div><div>Robert</div>