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<blockquote data-quote="ArloG" data-source="post: 1166682" data-attributes="member: 418555">Getting to the point. Is there a polariser design that will allow both linear and circular reception for a c band feed?Accepted that a normally used linear feed is used and signal strength for linear transponders will be attenuated.I've moved to a twin Norsat lnb with high quality orthomode feed. Previously a Titanium Satellite C2W wideband lnbf was used.For 2 or 3 circular polarised satellites I was able to get adequate dB to attain a lock.Of course when inserting the slab in the throat. Circular transponders came in strong. And linear tp's signal diminished.That was with the C2W.With the current ortho setup. My E2 receiver, an osmio4k, and after much fine tuning. Satellites that delivered mid 12 to a high of 15 dB now blast in.Some floor the signal meter at 100&amp; and up to 18 or so dB. So. I have linear signal to spare. Loss of lock for DVB is as low as 5 dB. Pixelization for DVB-S2 signals starts showing for some channels around 10 dB.But is seems 100% &quot;blind&quot; to any circular tp's.&nbsp; And as of yet I have not tried a slab in the throat. Unlike the Titanuim and others. There are no grooved slots to slip one into. And no visible probes in the throat of the ortho. But that, I could 'get'.Since I have signal to spare for linear tp's. Is there a design that anyone is aware of for a polariser that would allow a margin of linear signals to be used along with proper depolarising of circular transponders?</blockquote>

[QUOTE="ArloG, post: 1166682, member: 418555"] Getting to the point. Is there a polariser design that will allow both linear and circular reception for a c band feed? Accepted that a normally used linear feed is used and signal strength for linear transponders will be attenuated. I've moved to a twin Norsat lnb with high quality orthomode feed. Previously a Titanium Satellite C2W wideband lnbf was used. For 2 or 3 circular polarised satellites I was able to get adequate dB to attain a lock. Of course when inserting the slab in the throat. Circular transponders came in strong. And linear tp's signal diminished. That was with the C2W. With the current ortho setup. My E2 receiver, an osmio4k, and after much fine tuning. Satellites that delivered mid 12 to a high of 15 dB now blast in. Some floor the signal meter at 100& and up to 18 or so dB. So. I have linear signal to spare. Loss of lock for DVB is as low as 5 dB. Pixelization for DVB-S2 signals starts showing for some channels around 10 dB. But is seems 100% "blind" to any circular tp's. And as of yet I have not tried a slab in the throat. Unlike the Titanuim and others. There are no grooved slots to slip one into. And no visible probes in the throat of the ortho. But that, I could 'get'. Since I have signal to spare for linear tp's. Is there a design that anyone is aware of for a polariser that would allow a margin of linear signals to be used along with proper depolarising of circular transponders? [/QUOTE]

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