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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Andrews 1.8m on its way on monday
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<blockquote data-quote="Hitchcock" data-source="post: 191023" data-attributes="member: 196478"><p>I did not know that, but thanks for telling me. I do not understand why a feedhorn for picking up R&L circular needs to be any different (apart from maybe having a dialectric plate inside) from a feedhorn picking up H&V linear, but I guess Channel Master must have their reasons.</p><p></p><p>Also, I thought the signal coming out of a R&L circular feedhorn (or feedhorn + depolarizer) would be linear/depolarized (see SMW link above) so a normal (linear) flange universal LNB could be attached. The only other possibility I can think of is that the R&L circular feed does no depolarizing (no dielectric plate) of its own so the LNB has to (integrated depolarizer), so you might then call such an LNB a circular universal LNB (as opposed to just universal LN<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite6" alt=":cool:" title="Cool :cool:" loading="lazy" data-shortname=":cool:" />.</p><p></p><p>I think if you put two depolarizers (e.g. R&L circular feed with dielectric plate / 1st depolarizer + circular LNB / 2nd depolarizer), then the second one will throw back out half the signal ...</p><p></p><p>Anyway, hope your install goes well & thanks for sharing the details with us so far here on the forum.</p></blockquote><p></p>
[QUOTE="Hitchcock, post: 191023, member: 196478"] I did not know that, but thanks for telling me. I do not understand why a feedhorn for picking up R&L circular needs to be any different (apart from maybe having a dialectric plate inside) from a feedhorn picking up H&V linear, but I guess Channel Master must have their reasons. Also, I thought the signal coming out of a R&L circular feedhorn (or feedhorn + depolarizer) would be linear/depolarized (see SMW link above) so a normal (linear) flange universal LNB could be attached. The only other possibility I can think of is that the R&L circular feed does no depolarizing (no dielectric plate) of its own so the LNB has to (integrated depolarizer), so you might then call such an LNB a circular universal LNB (as opposed to just universal LNB). I think if you put two depolarizers (e.g. R&L circular feed with dielectric plate / 1st depolarizer + circular LNB / 2nd depolarizer), then the second one will throw back out half the signal ... Anyway, hope your install goes well & thanks for sharing the details with us so far here on the forum. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Andrews 1.8m on its way on monday
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