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Satellite PC Card Receivers, Internet by Satellite
TBS 6925 PCi Card with hardware blind scan in DVB-S2 and DVB-S
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<blockquote data-quote="Huevos" data-source="post: 761359" data-attributes="member: 301161"><p>VS, I don't really see where you are coming from. 17º isn't exactly low elevation and anyway 3º is 3º whatever the elevation. Also, on an 80cm dish 3º off target results in a signal around 20dB down. That means the signal coming from the central satellite is 100x stronger than that coming from the offset satellite. With a 5/6 FEC signal you need <8dB SNR for correctable reception leaving 12dB in reserve. That means for this effect to happen one signal needs to be at least 12dB stronger than the other... but that would mean you would have a 32dB margin in the other direction, i.e. almost 2000:1 SNR. I can see a strong signal on an adjacent satellite wiping out a weak one on the central satellite but it would not be possible for that to happen in both directions, at least not at 3º separation.</p></blockquote><p></p>
[QUOTE="Huevos, post: 761359, member: 301161"] VS, I don't really see where you are coming from. 17º isn't exactly low elevation and anyway 3º is 3º whatever the elevation. Also, on an 80cm dish 3º off target results in a signal around 20dB down. That means the signal coming from the central satellite is 100x stronger than that coming from the offset satellite. With a 5/6 FEC signal you need <8dB SNR for correctable reception leaving 12dB in reserve. That means for this effect to happen one signal needs to be at least 12dB stronger than the other... but that would mean you would have a 32dB margin in the other direction, i.e. almost 2000:1 SNR. I can see a strong signal on an adjacent satellite wiping out a weak one on the central satellite but it would not be possible for that to happen in both directions, at least not at 3º separation. [/QUOTE]
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Satellite PC Card Receivers, Internet by Satellite
TBS 6925 PCi Card with hardware blind scan in DVB-S2 and DVB-S
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