Common dish

6rgwa · 29-02-2008

Hi, me and my neighbours would like to setup common dish. I know it is possible, but I'm not sure if there is any way we can receive more than 1 satellite. Does somebone know? Thank you in advance.

**Robbo** · 29-02-2008

Hi,
Yes, you would put some additional LNBs on the dish, that are offset from the focus.

What satellites are you after?
What size/type of dish is it?

Robbo

6rgwa · 29-02-2008

We don't have anything yet, except receivers(mine is ss2 usb plus). I'm not decided exactly about which satellites to receive, but we would like to receive astra 19.2E, astra 23.5E and intellisat 13.0W. I think this combination is hard to reach, so I am more interested in technical solution - which devices we need, how many users etc. And thank you for answering me

.

**rolfw** · 29-02-2008

Something like this might do the job.

_http://www.sateuropa.co.uk/product_overview.asp?id=1556&catid=12&subcat=2

6rgwa · 29-02-2008

Thank you for link. I looked there, but I was unable to find out, how many users it can handle. I expect 2-5 users. I know that out there is something called Disecq, which should be equivalent to computer switch.
From my point of (IS/ICT) view I would :
1)"replicate" LNB signal and send it to these "switches", so then everyone can switch on his own.
2)Use some device which joins signal from LNBs, so it is not necessary to switch.
3)Link above is solution and I'm just unable to understand.
What do you think?

**rolfw** · 29-02-2008

Sorry, I misread your post, thought you'd said neighbour, not neighbours.

How many feeds do you need?

**canofan** · 29-02-2008

Originally Posted by 6rgwa

Thank you for link. I looked there, but I was unable to find out, how many users it can handle. I expect 2-5 users. I know that out there is something called Disecq, which should be equivalent to computer switch.
From my point of (IS/ICT) view I would :
1)"replicate" LNB signal and send it to these "switches", so then everyone can switch on his own.
2)Use some device which joins signal from LNBs, so it is not necessary to switch.
3)Link above is solution and I'm just unable to understand.
What do you think?

Satellites emit on 4 polarities Horizontal high and low and Vertical high and low. A single LNBF switches between the four polarities as required by the receiver.
Alps makes also a quattro LNB which gives you four polarities per satellite.
The Quattro does not need to switch because all four polarities will be always available.
You would need 4 of those with a 16x8 multiswtch. 16 for the 16 polarities on the LNB side and 8 on the receiver side for 8 receivers.
Such a multiswitch is powered by the mains. It powers the LNB's.
The diseqc signals from the individual receivers will select for each receiver the required polarity.

6rgwa · 29-02-2008

Rolfw: Every help is welcome, there is nothing to be sorry about.
Do you have any idea, how much would it cost?

**Robbo** · 29-02-2008

Originally Posted by 6rgwa

We don't have anything yet, except receivers(mine is ss2 usb plus). I'm not decided exactly about which satellites to receive, but we would like to receive astra 19.2E, astra 23.5E and intellisat 13.0W. I think this combination is hard to reach, so I am more interested in technical solution - which devices we need, how many users etc. And thank you for answering me.

Please could you clarify which satellites you want, as there is no such satellite as intellisat 13W ( I can't find it anyway

)

Is it listed here:-
_http://www.lyngsat.com.

And if you were wanting a Western satellite near that location it would not be possible with a single fixed dish with 19.2E AND 23.5E as well.

You would need two dishes.

For greater than four receivers you can also use Octo LNBs rather than quattros with a multiswitch, it might work out a little cheaper, but the wiring may get a bit messier.

**canofan** · 01-03-2008

Originally Posted by 6rgwa

I'm not decided exactly about which satellites to receive, but we would like to receive astra 19.2E, astra 23.5E and intellisat 13.0W. .

You mean Eutelsat 13E don't you?

You probably are not interested in 28E, but instead should be considering Sirius 5E and Thor 1W. These satellites care for your part of Europe.

for the quattros:
_http://www.srt-versand.de/sat-technik/lnbs-lncs/alps/

for the multiswitch
_http://www.srt-versand.de/sat-technik/schaltertechnik/
fte-maximal-multischalter/

also on Ebay

and much cheaper. I am intending to buy one of these: Ebay

180219713447

As a multiswitch is electrically fed, it should be placed in a dry place e.g in the loft.
You will need sixteen cables to the multiswitch from the LNBs.

**HB13DISH** · 01-03-2008

Originally Posted by 6rgwa

Hi, me and my neighbours would like to setup common dish. I know it is possible, but I'm not sure if there is any way we can receive more than 1 satellite. Does somebone know? Thank you in advance.

Please take into consideration that there might be electrical hazards when different people share the same LNB.
Are you all living in the same building or different houses?
Search for posts regarding this before you decide to go ahead and do the costly installations.

**canofan** · 01-03-2008

Originally Posted by HB13DISH

Please take into consideration that there might be electrical hazards when different people share the same LNB.
Are you all living in the same building or different houses?
Search for posts regarding this before you decide to go ahead and do the costly installations.

Surely it is assumed that each apartment or house sharing this distributive system complies totally with electrical safety and that the electrical outlet of each receiver and television are on a differential tripper.
Also the multiswitch should be fed from the same sort of outlet.
This implies providing an earthing point for each of the appliances when it is not already so equipped.

**Robbo** · 01-03-2008

The problem canofan is that if the sharing properties are on different electrical phases, if a fault occurs, due to the voltage across two phases being greater than a single phase it is not as safe.

6rgwa · 01-03-2008

Thank everyone for explaining me right terms. As I have read it, I found out that this is quite foolish idea. Pointing dish at one satellite seems to be sufficient for this kind of receiving.
To your questions: I'm sorry, but my first satellite experience was made a month ago - of course Eutelsat is right. And we all live in one house.

**Robbo** · 01-03-2008

Originally Posted by 6rgwa

Thank everyone for explaining me right terms. As I have read it, I found out that this is quite foolish idea. Pointing dish at one satellite seems to be sufficient for this kind of receiving.
To your questions: I'm sorry, but my first satellite experience was made a month ago - of course Eutelsat is right. And we all live in one house.

It is not a foolish idea at all.

Living in one house makes it all the more easier.

You have two options: Octo LNBs with diseqc switches, or quattros with a mutiswitch.

If you went for the Octo_LNB to start off with, you would be able to add the other two LNBs at a later date when your confidence grew a bit.

If you plan ahead, you would buy a dish from a manufacturer that supplies a multi LNB bracket for its dishes, Triax,Orbital,and Raven are three more examples.

Robbo

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Common dish Information exchange on LNBs, Single satellite, motorised and multi-satellite systems. DiSEqC switches, positioners, motors, actuators, dish-alignment etc.

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