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Antenna R&D
Excellent link with antenna comparisons with spectrum analyzer
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<p>[QUOTE="tballister, post: 45511, member: 5087"]Ooooo... I don't think this is correct, EV.</p><p></p><p>First of all there is no difference in picture quality within and above the error correction capability. If the BER is sufficiently low such that errors can be corrected, you get, by definition, correct data. As the BER increases just above the correction capability, you generally experience pixellation on most receivers. Once the BER increases beyond the correction capability, receivers implement video/audio squelch and you get "Signal Lost". [I'm not sure there is a standard for a specific percentage of errored frames over a specfic interval before declaring "Signal Lost"]</p><p></p><p>Margin above the error correction threshold <em><u>is </u></em>the name of the game. If you want to withstand the worst of times, you need to have margin at the best of times.</p><p></p><p>I don't understand how there could possibly be an additional "small increase in picture quality" once margin increases above the error correction capability threshold. Unerrored and corrected frames represent a received bitstream that is precisely the bitstream generated, by definition.</p><p></p><p>Sorry.[/QUOTE]</p><p></p>
[QUOTE="tballister, post: 45511, member: 5087"]Ooooo... I don't think this is correct, EV. First of all there is no difference in picture quality within and above the error correction capability. If the BER is sufficiently low such that errors can be corrected, you get, by definition, correct data. As the BER increases just above the correction capability, you generally experience pixellation on most receivers. Once the BER increases beyond the correction capability, receivers implement video/audio squelch and you get "Signal Lost". [I'm not sure there is a standard for a specific percentage of errored frames over a specfic interval before declaring "Signal Lost"] Margin above the error correction threshold [I][U]is [/U][/I]the name of the game. If you want to withstand the worst of times, you need to have margin at the best of times. I don't understand how there could possibly be an additional "small increase in picture quality" once margin increases above the error correction capability threshold. Unerrored and corrected frames represent a received bitstream that is precisely the bitstream generated, by definition. Sorry.[/QUOTE]
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Antenna R&D
Excellent link with antenna comparisons with spectrum analyzer
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