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Satellite TV receivers & systems support forums
Fringe Reception General
dbi vs db
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<blockquote data-quote="steffo78" data-source="post: 141382" data-attributes="member: 196557"><p>So then I have to assume that it is always dBi since only cheaper dishes is specified with dB.</p><p>This would be the most logic answer.</p><p></p><p>I thought that dB when you measure gain on a dish was something predefined, you compare it to something, guess its not.</p><p></p><p>About the frequency, that is really annoying.</p><p>It is not easy to compare when you measure at different frequencys.</p><p>Usually it is around 11700, but gibertini is 10950 and all cheap stuff you can assume to be at the highest possible 12700.</p><p>Also efficiency is not for real, like Jonsa claims 75% on some of their prime focus dishes... Have even seen over 80% on a prime, dont remember name right now.</p><p>Would be good with a standardized method of measuring, then you could see what you are paying for and performance!</p></blockquote><p></p>
[QUOTE="steffo78, post: 141382, member: 196557"] So then I have to assume that it is always dBi since only cheaper dishes is specified with dB. This would be the most logic answer. I thought that dB when you measure gain on a dish was something predefined, you compare it to something, guess its not. About the frequency, that is really annoying. It is not easy to compare when you measure at different frequencys. Usually it is around 11700, but gibertini is 10950 and all cheap stuff you can assume to be at the highest possible 12700. Also efficiency is not for real, like Jonsa claims 75% on some of their prime focus dishes... Have even seen over 80% on a prime, dont remember name right now. Would be good with a standardized method of measuring, then you could see what you are paying for and performance! [/QUOTE]
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Satellite TV receivers & systems support forums
Fringe Reception General
dbi vs db
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