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Old 15-02-07, 08:58 PM   #1 (permalink)
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Default Twin LNB and motorized dish!

Could someone please tell me if this scenario is feasible?

Motorized set up with one cable from twin output LNB feeding receiver to one television and other cable fed to another television(no receiver)in other room.
Say for example you have receiver switched on and tuned to Art channel but actually watching NON-satellite(terrestrial or freeview) on that tv , would you be able to receive Art on the tv in other room? :?
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Old 15-02-07, 09:19 PM   #2 (permalink)
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Default Re: Twin LNB and motorized dish!

LOL, sorry... I tried several times to understand that, but it's not happening. Could you have another go, or perhaps draw us a scribbled picture?
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Old 15-02-07, 09:40 PM   #3 (permalink)
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Default Re: Twin LNB and motorized dish!

If you do not have a satellite receiver at the end of the cable and you plug the cable into your TV you will not receive any satellite channels.
Well that's the way I have read the OP's question.
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Old 15-02-07, 09:44 PM   #4 (permalink)
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Default Re: Twin LNB and motorized dish!

I THINK I understand what you're on about. Are you saying that you want to be able to watch a satellite channel in room A, with the reciever in room B, while the TV in room B watches another channel, from a different source (Freeview etc)?

If that is what you mean, then YES, you can do that, and the way I'd do it, you don't even need the second c@ble from the LNB. What you do need to do is make sure that your receiver has a second video output available, or get some kind of splittery thingy. Depending on how your TVs are set up, there are a number of ways of doing it, some easier than others.

My preferred way uses an RF modulator to turn the AV (Scart) signal coming out of the receiver into good old UHF TV, which is mixed in with the signal from the terrestrial antenna. A picture speaks a thousand words (Excuse the quality of diagram): (Satellite c@ble shown dotted, scart/phono dashed, TV antenna wavy)

_____ ________ _____
|LNB|....>|RECEIVER|-[1]------------->|TV B |
| /\
[2] s
| s
_______ |____________ _______s_____________ _____
|TV ANT|~~~>|RF MODULATOR|~| Aerial Amplifier/Splitter | ~>|TV A|


You should then be able to pick up the satellite channel that is currently tuned, as an extra channel on TV A. (You will almost certainly need to rescan)

EDIT: Oh dear. A quick google reveals that they're now quite hard to find. Have you got a VCR lying around?

The other solution would be better if TV A is connected directly to the aerial (as in, goes nowhere near TV B). Leave the existing aerial cabling as it is, and put in a longish scart from the reciever to TV A. Beware, this is vulnerable to quality loss over distance.

_____ ________ _____
|LNB|....>|RECEIVER|-[1]------------->|TV B |
|
[2]
|
___|____
| TV A|

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Old 15-02-07, 09:55 PM   #5 (permalink)
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Default Re: Twin LNB and motorized dish!

Sorry about confusion Stick ops:
Yes Frederic , that 's what I meant
Does diagram below make things clearer?

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Old 16-02-07, 11:13 AM   #6 (permalink)
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Default Re: Twin LNB and motorized dish!

OK, gotcha.

No, I'm afraid

As the guys have said, you need a receiver at the end of the coax in room 2. Why? Because what's coming down the satellite coax isn't the finished article.

The LNB knocks a heap of frequency off the incoming satellite signal if you like. It uses a Local Oscillator as a reference point to reduce the extremely high microwave frequencies broadcast by the satellite into what's known as an 'Intermediate Frequency'. This is a little misleading too, as what it actually is, is a whole band of frequencies. The tuner in the satellite receiver then 'tunes' one of these frequencies for demodulation and forward transmission to your TV.

So you see, there is still a lot of work to be done on the signal coming from the LNB - which is why we've all got too many receivers for our own good!

On the up side, there is no reason why you can't take a coaxial feed from the RF output (assuming your receiver has one) of the receiver in room 1 and feed that directly into the TV in room 2 - but you will obviously have to tune the receiver to the channel you want to watch (i.e. same channel in both rooms).

A second cheap receiver is the best way to go.

@frederific - like your diagram m8 - you can still get those SCART-UHF jobbies if you search around. There are normally some on eBay.

Hope this helps.
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Old 16-02-07, 01:45 PM   #7 (permalink)
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Default Re: Twin LNB and motorized dish!

Thanks again everyone!
I plan to install a Technomate 1500ci + so I think I will go for the "coaxial feed from RF output" option. :clap:
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