cabling for Wavefrontier T55 setup

[MrCheese]

As part of a renovation and rewiring I want to install a multisat setup. The dish is in a very hard to reach location so ongoing fiddling will be difficult. I'm trying to install something that will last for years.

My plan is the following: Setup a T55 with an octo LNB pointing to Astra 28 for Sky and single LNBs to 4 other satellites that I want. This will mean 12 cables coming in to the house which I would then terminate on a patch panel. These would then be connected to switches or connected to wiring to receivers in other parts of the house.

Does this sound like a good plan? The advantage would be that all the hardware except the LNBs would be in the house. On the other hand I am going to have to take 12 cables through the side of the house.

Any thoughts would be appreciated.

 

[Robbo]

My thought would be. Put the switches outside, and only run in what you need to. Also of the cable runs are relatively short, you could use wf65, as it is a lot thinnner.

To avoid having to fiddle with the LNBs too much once its on the wall, if possible, set it up on a vertical pole on the ground, then make the wall mount vertical too.(I believe it needs to be anyway on the wavefrontier.)

 

[Terryl]

You have to use the special LNB's designed for the T55 andT90 WaveFrontier dishes, this type of dish uses a reverse input type of LNB, this is due to the double bounce on the T55 design, it uses a reflector to hit the LNB's, using a standard LNB would put the signal out of phase and it wont work.

Use good quality RG-6 quad with the pure copper center conductor to run to your switch(s) and a good outdoor rated switch (or mounted inside a water tight box or inside) will give you years of service without problems.

 

[rolfw]

You have to use the special LNB's designed for the T55 andT90 WaveFrontier dishes, this type of dish uses a reverse input type of LNB, this is due to the double bounce on the T55 design, it uses a reflector to hit the LNB's, using a standard LNB would put the signal out of phase and it wont work.

As far as I know there is no requirement for special LNBs, standard universal LNBs will work fine, have a look at the pictures of members' setups section, several torroidal dishes in there using bog standard LNBs. Now whether it's the case with circular polarisation is another matter altogether, but as there is nothing in the European zone to receive using circular polarisation on Ku band, it is largely irrelevant.

 

[Rick]

Accross the pond there is alot of circular polarised KU band. Because the signal is reflected a second time it reverses the LH and RH polarisation. A reversed LNB just compensates for this. You could just as easially swap the polarisation over in your transponder settings to make the adjustment. It dosen't put the signal out of phase, all that happens is that the reciever would be looking for a LH polarisation, but because of the double reflection would see a right hand polarisation. And even then you might need a KU Band Linear Polarised LNB if you want to recieve channels broadcast on linear polarisation, which a reversed LNB is incapable of recieving.

Here in Europe circular polarised KU band isn't used, and the extra reflection has no effect on a linear polarised signal. Any standard universal LNB will do.

Unless you have a need to alter what rooms recieve what I would fit the switches outside, and Cable in to feed points.

 

[Terryl]

Ahhh sorry my fault, I keep forgetting that you all don’t use the circular stuff on that side of the pond.

I will have to put up a post-it note on the monitor.

 

[RimaNTSS]

Eutelsat W4/W7 at 36*E broadcasts signals in circular polarization. For example, even in Germany, in Berlin on 120cm dish possible to receive. For Russian-speaking folks that is very good option. I was changing left-right polarization during scanning, but now I have got new circular quad LNB and turned polarization plate 90 degrees and it works fine.

 

[Rick]

If I am not mistaken those are c band not ku band. Most if not all c band broadcasts are circularly polarized.

 

[RimaNTSS]

No, 36*E is in Ku band. Closest C-band comes from 49*E.

 

[Rick]

Ah yes I see them. They are on the Russian and south African beams. Carrying ntv and multichoice. I assume your receiving the Russian beam. Last I checked neither were part of Europe or receivable to the op on a t90. Interesting though.

Sent from my HTC Desire using Tapatalk