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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Satellite Meters and Installation Equipment
Emitor Satlook Micro+G2 NIT - Demo
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<blockquote data-quote="vma" data-source="post: 741722" data-attributes="member: 256592"><p>2e-4 means 2x10^(-4)</p><p></p><p>Which means in case of BER (Bit Error Rate), that you have 0.0002 errors per bit (which does not make much sense). You need to divide this value 1/0.0002 and then you get 1 error every 5000 bits.</p><p></p><p>Of course you would like to get less errors, so a SMALLER BER would be nice: 8e-5 would give you on error in every 12500 bits.</p><p></p><p>Because digital receivers have error correction algorithms incorporated, you can live with 1e-4. In order to have bad weather reserves, you should aim at 1e-5 or 1e-6.</p><p></p><p>These numbers are indicated in SCIENTIFIC NOTATION, with the "e" meaning to the power of 10 (10^x). This is nice because the number will have more or less the same digits on the screen, while they would vary from few to many digits in normal notation.</p><p></p><p>MER, on the other hand measures modulation error ratio: here you want to achieve a number as big as possible. It will tell you the difference between the signal and the noise. The bigger the difference, the easier it is to tell the signal from the noise.</p><p></p><p>Cheers,</p><p>vma</p></blockquote><p></p>
[QUOTE="vma, post: 741722, member: 256592"] 2e-4 means 2x10^(-4) Which means in case of BER (Bit Error Rate), that you have 0.0002 errors per bit (which does not make much sense). You need to divide this value 1/0.0002 and then you get 1 error every 5000 bits. Of course you would like to get less errors, so a SMALLER BER would be nice: 8e-5 would give you on error in every 12500 bits. Because digital receivers have error correction algorithms incorporated, you can live with 1e-4. In order to have bad weather reserves, you should aim at 1e-5 or 1e-6. These numbers are indicated in SCIENTIFIC NOTATION, with the "e" meaning to the power of 10 (10^x). This is nice because the number will have more or less the same digits on the screen, while they would vary from few to many digits in normal notation. MER, on the other hand measures modulation error ratio: here you want to achieve a number as big as possible. It will tell you the difference between the signal and the noise. The bigger the difference, the easier it is to tell the signal from the noise. Cheers, vma [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Satellite Meters and Installation Equipment
Emitor Satlook Micro+G2 NIT - Demo
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