co rotor or not?

[keebs]

in my quest for the best big dish i can find, what would be the benefit of a co rotor? what does a co rotor do that a fixed lnbf doesn't? i understand it sets the skew right?? so is it better to look for a dish with or without or doesn't matter? thanks guys

[wejones]

Originally Posted by keebs

in my quest for the best big dish i can find, what would be the benefit of a co rotor? what does a co rotor do that a fixed lnbf doesn't? i understand it sets the skew right?? so is it better to look for a dish with or without or doesn't matter? thanks guys

THe corotor allows you to change the polarity to any angle. The lnbfs just allow you to switch between H and V. For most channels, there is no difference, however for AMC1-ku the polarity is offset something like 25 degrees or so. So the CoRotor would be an advantage on that sat.

[rainman]

if you are going to use it for 4DTV I would recommend the corotor with a couple of norsat lnbs if you are going to use it for DVB then go with the BSC-621.

[rleehamn]

I've been away for awhile.

Was getting ready to hook up the 920 4dtv and didn't know which bsc621 to order? The standard or the Univer?

I may or may not slave my MercII. (Since I already have a fta dish for the mercII)

Thanks

[elgemcdlf]

If you are using with the 920 then you will need the standard. 4DTV receivers do not play well with Universal lnbf's

[rleehamn]

Thanks for the reply

[rleehamn]

Originally Posted by rainman

if you are going to use it for 4DTV I would recommend the corotor with a couple of norsat lnbs if you are going to use it for DVB then go with the BSC-621.

Rainman,
Would I be better off with this same setup? If so, does sadoun sell the co rotor and norsat lbnfs? If not can you tell me a good place that does?

Or is this a corotor w/norsat lnbs?

(I don't know that much on c-band parts, confused!)
Thanks

[wejones]

Originally Posted by rleehamn

Rainman,
Would I be better off with this same setup? If so, does sadoun sell the co rotor and norsat lbnfs? If not can you tell me a good place that does?

Or is this a corotor w/norsat lnbs?

(I don't know that much on c-band parts, confused!)
Thanks

Basically the CoRotor is a brand of a feedhorn. There are different brands of feedhorns, and there are feedhorns that only do C-band, and also feedhorns that are for C and Ku. There are also feedhorns that use a polarotor to fine tune polarity, and there are also ortho feedhorns that have separate H and V connections for lnbs, and don't allow fine tuning via polarotors. The CoRotor is just a brand of feedhorn that does both C and Ku, and uses a polarotor to vary the polarity of both bands (thus the "corotor"). But there are other brands that do the same thing. But a basic feedhorn doesn't come with lnbs and may or may not come with the polarotor. All can be added separately.
Sadound doesn't sell the CoRotor or any other brand of feedhorn. Saduon sells C/Ku LNBFs instead. These are easier to use with a FTA receiver, but provided that you get the standard version, they can also be used with an analog or 4dtv receiver as well.
Going the feedhorn route is more expensive than going the LNBF route, however there are some advantages. If one of the lnbs in an LNBF goes bad, you basically have to replace the entire LNBF, whereas with a feedhorn, you just replace the part that went bad. I'm on my 3rd KU lnb, and 2nd C-band lnb on my CoRotor. Also, you have a much wider variety of quality of lnbs available if you go the feedhorn route. Generally, the lnbfs available are equivalent to the very low end of separate LNBs. On the other hand, I've never really seen much difference in the actual performance of low end lnbs vs high end lnbs. Yes, the high end lnbs are more stable, but most receivers can follow the frequency drift of a low end lnb just fine.

Basically the decision re what to get depends on what you plan to use the system for, and whether you want to save money, or if you are the type that likes to upgrade to high quality components, etc, etc.