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Satellite TV receivers & systems support forums
Fringe Reception General
0.01dB lnb?
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<blockquote data-quote="ouagadougou" data-source="post: 192246" data-attributes="member: 187470"><p>I have no idea which equipment SMW use today but I still have more faith in the numbers they quote and they are definately more accurate than say Invacom or Sharp etc. If SMW are still using these old Noise Figure Meters then of course we still have some uncertainty but if they are using the latest generation of equipment then that uncertainty is much lower. Any decent maufacturer will leave a small safety margin in the quoted figure or clarify it as typical or peak etc.</p><p></p><p>Lets face it you also get the same impedance changes when you attach the LNA to a feedhorn or when you change the elevation of the dish or when you change frequency across the band so we have uncertainties across the board, you also get Noise Temperature changes as the LNA/LNB temperature changes so there are a lot of variables.</p><p></p><p>I just think its unfair that many people go out an buy the latest Super LNB just because the manufacturer makes a wild claim about performance thats completely untrue and unproven.</p></blockquote><p></p>
[QUOTE="ouagadougou, post: 192246, member: 187470"] I have no idea which equipment SMW use today but I still have more faith in the numbers they quote and they are definately more accurate than say Invacom or Sharp etc. If SMW are still using these old Noise Figure Meters then of course we still have some uncertainty but if they are using the latest generation of equipment then that uncertainty is much lower. Any decent maufacturer will leave a small safety margin in the quoted figure or clarify it as typical or peak etc. Lets face it you also get the same impedance changes when you attach the LNA to a feedhorn or when you change the elevation of the dish or when you change frequency across the band so we have uncertainties across the board, you also get Noise Temperature changes as the LNA/LNB temperature changes so there are a lot of variables. I just think its unfair that many people go out an buy the latest Super LNB just because the manufacturer makes a wild claim about performance thats completely untrue and unproven. [/QUOTE]
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Satellite TV receivers & systems support forums
Fringe Reception General
0.01dB lnb?
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