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DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
What is the difference between L / R and Horizontal / Vertical Polarities ?
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<blockquote data-quote="Vipersan" data-source="post: 791330" data-attributes="member: 325666"><p>My guess ...</p><p>Cost of production of set top boxes ..and lnbs ..</p><p>Its cheaper and less hassle to produce an lnb with 2 probes built into the feed to detect the 2 linear polarities ..and the boxes don't then require any dielectric postitioning to detect the RHC and LHC ....as is done in a corotor ..</p><p>No moving parts ...simpler and cheaper to construct ..</p><p></p><p>Circular is known to be very efficient ...but is legacy stuff ..</p><p>It wouldn't exist in the commercial world of sat to home ...if back in the day ..they could have made linear lnbs at such a small cost as they do today...</p><p></p><p>Back in the days of BSB ...they did use it but was one circular polarity only ...</p><p>so less efficient use of the available spectrum ...</p><p>You can pack more into the same spectrum ..by alternating H and V..and without limiting yourself to RHC or LHC ..with no moving parts..</p><p></p><p>rgds</p><p>VS</p></blockquote><p></p>
[QUOTE="Vipersan, post: 791330, member: 325666"] My guess ... Cost of production of set top boxes ..and lnbs .. Its cheaper and less hassle to produce an lnb with 2 probes built into the feed to detect the 2 linear polarities ..and the boxes don't then require any dielectric postitioning to detect the RHC and LHC ....as is done in a corotor .. No moving parts ...simpler and cheaper to construct .. Circular is known to be very efficient ...but is legacy stuff .. It wouldn't exist in the commercial world of sat to home ...if back in the day ..they could have made linear lnbs at such a small cost as they do today... Back in the days of BSB ...they did use it but was one circular polarity only ... so less efficient use of the available spectrum ... You can pack more into the same spectrum ..by alternating H and V..and without limiting yourself to RHC or LHC ..with no moving parts.. rgds VS [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
C-Band Reception, UK and Europe
What is the difference between L / R and Horizontal / Vertical Polarities ?
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