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Sky Digital BSkyB, Freesat & Saorsat support forum
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skyQ lnb no signal on one output
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<blockquote data-quote="Channel Hopper" data-source="post: 968557" data-attributes="member: 175144"><p>Not quite, a Q LNB is (from my limited knowledge) a two port LNB combining both low and high frequencies from one polarity into a seamless range by shifting the upper local oscillator down to 10.4GHz . The second port does the same with the opposite polarity.</p><p></p><p></p><p><em>BUT running the installers tester directly attached to the LNB WORKS! Attach a 2m length of cable to the LNB and test from that FAILS!</em></p><p></p><p></p><p>There is a greater chance that the installer did not select the correct transponder group on the meter when checking the second port, as opposed to the LNB itself being low output on one , or both polarities.</p><p></p><p>Additionally a distribution box is mentioned within the mix of new and legacy equipment conected on site. Quite how a dual band LNB can be used on a four port distribution box without a Q type expander to convert back to the four port requirement is anybody's guess based on the o/p's initial post. Was one installed before changing out the LNB on the roof ?</p></blockquote><p></p>
[QUOTE="Channel Hopper, post: 968557, member: 175144"] Not quite, a Q LNB is (from my limited knowledge) a two port LNB combining both low and high frequencies from one polarity into a seamless range by shifting the upper local oscillator down to 10.4GHz . The second port does the same with the opposite polarity. [I]BUT running the installers tester directly attached to the LNB WORKS! Attach a 2m length of cable to the LNB and test from that FAILS![/I] There is a greater chance that the installer did not select the correct transponder group on the meter when checking the second port, as opposed to the LNB itself being low output on one , or both polarities. Additionally a distribution box is mentioned within the mix of new and legacy equipment conected on site. Quite how a dual band LNB can be used on a four port distribution box without a Q type expander to convert back to the four port requirement is anybody's guess based on the o/p's initial post. Was one installed before changing out the LNB on the roof ? [/QUOTE]
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Sky Digital BSkyB, Freesat & Saorsat support forum
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skyQ lnb no signal on one output
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