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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Norsat LNB Whats Wrong ? pics
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<blockquote data-quote="canofan" data-source="post: 491944" data-attributes="member: 259756"><p>Originally Posted by <strong>Rd100</strong> <a href="http://www.satellites.co.uk/satellite/dish-setup-single-sat-multi-sat-motorised-systems/116898-norsat-lnb-whats-wrong-pics.html#post717049" target="_blank"><img src="http://www.satellites.co.uk/satellite/images/buttons/viewpost.gif" alt="" class="fr-fic fr-dii fr-draggable " style="" /></a><p style="margin-left: 20px"><em>For maximum signal from the norsat lnb it should be bolted direct to the feedhorn then skew it by hand for horizontal or vertical that is it there is no point in trying to add more lnbs to the feed as you will get to much signal loss and you then might as well use a invacom.</em></p><p></p><p>The dual flange acts as a filter. It impedes the horizontals in the vertical channel and the same to the verticals in the horizontal channel. As what is impeded does not go through, it remains available for the other channel (filter theory). So practically there would be no loss and the reception gain will remain virtually the same. The VSWR is the same for both channels when used in the same band. If one channel is used for the higher band 12.2 to 12.75 ghz the VSWR will go up slightly because the flange is optimised for the 11.7 to 12.2 ghz.</p></blockquote><p></p>
[QUOTE="canofan, post: 491944, member: 259756"] Originally Posted by [B]Rd100[/B] [URL="http://www.satellites.co.uk/satellite/dish-setup-single-sat-multi-sat-motorised-systems/116898-norsat-lnb-whats-wrong-pics.html#post717049"][IMG]http://www.satellites.co.uk/satellite/images/buttons/viewpost.gif[/IMG][/URL][INDENT][I]For maximum signal from the norsat lnb it should be bolted direct to the feedhorn then skew it by hand for horizontal or vertical that is it there is no point in trying to add more lnbs to the feed as you will get to much signal loss and you then might as well use a invacom.[/I][/INDENT] The dual flange acts as a filter. It impedes the horizontals in the vertical channel and the same to the verticals in the horizontal channel. As what is impeded does not go through, it remains available for the other channel (filter theory). So practically there would be no loss and the reception gain will remain virtually the same. The VSWR is the same for both channels when used in the same band. If one channel is used for the higher band 12.2 to 12.75 ghz the VSWR will go up slightly because the flange is optimised for the 11.7 to 12.2 ghz. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Norsat LNB Whats Wrong ? pics
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