lnb quatro switch..?

skywave

skywave

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My Satellite Setup
One 100cm dish with 3 Universal Quattro 0.6db LNBs at 28.2E, 19.2E, 13.0E..

One 85cm dish with 1 Universal Quattro 0.6db LNB at 0.9W..

4 - 4x1 DiSEqC switches..

DM8000HD, DM7020S, HUMAX VACI-5300, OPENTEL ODS 4000F
My Location
Luxembourg City
#1
what is the diff between a lnb quatro switch and a lnb quatro..?
 
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pgh13

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XTrend ET8000, Dr HD 15, PC/twinhan combination. 80cm dish. GBPVR with 2 DTTV cards +hauppauge Media MVP +Raspberry Pi running XBMC
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Midlands UK
#2
Quad and quatro LNBs have similar names but are different ways of providing for multiple receivers. A quad has 4 outputs which can be connected to 4 receivers and each is controlled by its receiver for H or V Hi or Lo band. A quattro has 4 outputs but each output is fixed as one of H, Hi; H, Lo; V, Hi; and V, Lo. The receivers are then connected to a switch which determines which combination of polarisation and band is required and connects the receiver to the appropriate output. That system is more expensive than a quad but allows for more receivers per dish and so could be installed in, say. an appartment block
 
skywave

skywave

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My Satellite Setup
One 100cm dish with 3 Universal Quattro 0.6db LNBs at 28.2E, 19.2E, 13.0E..

One 85cm dish with 1 Universal Quattro 0.6db LNB at 0.9W..

4 - 4x1 DiSEqC switches..

DM8000HD, DM7020S, HUMAX VACI-5300, OPENTEL ODS 4000F
My Location
Luxembourg City
#3
pgh13,

OK - think I understand the principle..
But could you clarify me on this then.:
Right now I have 4 quadro LNBs up there on the roof - 3 on one dish and 1 on another dish..
They have each 4 cables which goes to 4 diseqc's and then 4 cables down to 4 receivers - which in turn are able to watch TV independently..

Would there be any good reason - or advantage - for me to swap the 4 quadro LNBs with 4 new quadro LNB switches..? And in the same process aquire them with 0.2db iso the 0.6db I have now..
 
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pgh13

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My Satellite Setup
XTrend ET8000, Dr HD 15, PC/twinhan combination. 80cm dish. GBPVR with 2 DTTV cards +hauppauge Media MVP +Raspberry Pi running XBMC
My Location
Midlands UK
#4
I suppose the benfit would be that you'd be able to feed more than 4 receivers, but I don't have experience with this sort of kit. It'd have to be a pretty specailised box to take 16 lnb inputs - Sounds expensive!
 
rolfw

rolfw

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Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
#5
skywave

skywave

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My Satellite Setup
One 100cm dish with 3 Universal Quattro 0.6db LNBs at 28.2E, 19.2E, 13.0E..

One 85cm dish with 1 Universal Quattro 0.6db LNB at 0.9W..

4 - 4x1 DiSEqC switches..

DM8000HD, DM7020S, HUMAX VACI-5300, OPENTEL ODS 4000F
My Location
Luxembourg City
#6
..hhmm - I think - actually I know - that I'm confused about this topic regarding LNB, DiSEqC - and now also switches..
I had a professional company set up everything on the roof and down to the receivers..
Slowly I'm starting to dig into this satellite system - and I find it quite interesting - even to the degree that I want to completely take it over myself - eventually ending up with a Satlook Digital NIT to adjust the dishes and LNBs myself in the future..

I have 4 LNBs - with 4 cables each - and one cable from each LNB goes into 1 DiSEqC..
Then - from each DiSEqC - goes 1 cable down to 4 different receivers..
I can do all receiver setup fine now..

But my interest has started to move also towards the setup on the roof - and what I'm a bit unsure about is:

What does the DiSEqCs actually do..? Are they the switches - same as the LNB with switches..? And if so - cold I then scrab the DiSEqCs and have everything in the LNBs - or am I mixing things up..?

And would a LNB with switch (opposed to the ones I have now without switches) do me any good - or would they be waste..? I use only 4 or 5 receivers in the whole house..

Also - where does the power come from - is that brought down through the dish and LNBs together with the satellite signal..?
Or is the power coming backwards up through the coaxial cable from the receiver power..?
Ha - ha - that's probably one Q which will have you guys roll over on the floor with laughter :-rofl2

Finally - my LNBs are 0.6db - would new ones with 0.2 or even lower be a big difference in TV picture quality..?
 
rolfw

rolfw

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Technomate 5402 HD M2 Ci, DM7000s, Transparent 80cm Dish, Moteck SG2100 DiseqC motor, lots of legacy gear. Meters: Satlook Digital NIT, Promax HD Ranger+ spectrum analyser.
My Location
Berkshire
#7
Unless you want to receive more satellites, what you have is the best setup.

A DiseqC switch will simply switch between different LNBs.
 
2cvbloke

2cvbloke

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Near Pontop Pike, Co. Durham
#8
skywave said:
Also - where does the power come from - is that brought down through the dish and LNBs together with the satellite signal..?
Or is the power coming backwards up through the coaxial cable from the receiver power..?
Ha - ha - that's probably one Q which will have you guys roll over on the floor with laughter :-rofl2

Finally - my LNBs are 0.6db - would new ones with 0.2 or even lower be a big difference in TV picture quality..?
It comes from the receiver up the cable to the Motor/LNB...

0.2 is theoretically impossible, got for a 0.3 instead, but there wouldn't be any visible difference, only something that a spectrometer could pick up...
(I use a Grundig 0.6dB twin LNB on my indoor dish and it gives me upto 80% signal quality/strength).
 
skywave

skywave

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My Satellite Setup
One 100cm dish with 3 Universal Quattro 0.6db LNBs at 28.2E, 19.2E, 13.0E..

One 85cm dish with 1 Universal Quattro 0.6db LNB at 0.9W..

4 - 4x1 DiSEqC switches..

DM8000HD, DM7020S, HUMAX VACI-5300, OPENTEL ODS 4000F
My Location
Luxembourg City
#9
thanks - guys - for the clarifications :)
 
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spiney

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Pace 2200 Sky digibox with ftv card, Comag SL65 FTA sat receiver, 40cm Sky minidish, Setpal terrestrial receiver (for free uk tv only!).
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Midlands
#10
Also see my multiswitch guide, in faqs sections below.

Multiswitches (and/or multi output lnbs) - and motorised dishes - combined is technically possible, but not done, because with a single satellite dish shared between many users, obviously there would be "pointing conflicts"! For multi-satellite multi-user, the solution is mult-satellite input multiswitches (again, see my multiswtich guide).
 
skywave

skywave

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My Satellite Setup
One 100cm dish with 3 Universal Quattro 0.6db LNBs at 28.2E, 19.2E, 13.0E..

One 85cm dish with 1 Universal Quattro 0.6db LNB at 0.9W..

4 - 4x1 DiSEqC switches..

DM8000HD, DM7020S, HUMAX VACI-5300, OPENTEL ODS 4000F
My Location
Luxembourg City
#11
Good one - spiney,
Will use your tutorial for future reference :)
 
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Hitchcock

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#12
2cvbloke said:
0.2 is theoretically impossible, got for a 0.3 instead, but there wouldn't be any visible difference, only something that a spectrometer could pick up...
Sorry, but I have to challenge that claim, 0.2 dB might be practically impossible at the moment, but it is NOT theoretically impossible. Unless you can explain it further by telling us which theory you are basing it on.

Also the difference in C/N between a 0.6 dB and a 0.2 dB LNB is 5.0 dB (approximately 3-fold increase in signal vs. noise) in theory.

Theoretical C/N difference between a 0.6 dB and a 0.3 dB LNB is 3 dB (2-fold increase in signal vs. noise) which would certainly not go unnoticed!
 
skywave

skywave

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My Satellite Setup
One 100cm dish with 3 Universal Quattro 0.6db LNBs at 28.2E, 19.2E, 13.0E..

One 85cm dish with 1 Universal Quattro 0.6db LNB at 0.9W..

4 - 4x1 DiSEqC switches..

DM8000HD, DM7020S, HUMAX VACI-5300, OPENTEL ODS 4000F
My Location
Luxembourg City
#13
yeah - I thought 0.2dB is a possibility, but I don't want to sound clever - see this link though: _h**ps://www.satplace.de/spnew/frontend/index.php?disp=pdetail&id=916&PHPSESSID=546585b0b307208b6bccf4be80d58a27

Looks like this Vantage model is advertizing 0.2dB..?

(just edited the link - I'm unsure if we are allowed to post links..? Have seen others substituting letters in a link - is it supposed to be like that..?)
 
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changiz

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I would like to register in your site
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canada
#14
skywave said:
yeah - I thought 0.2dB is a possibility, but I don't want to sound clever - see this link though: h**ps://www.satplace.de/spnew/frontend/index.php?disp=pdetail&id=916&PHPSESSID=546585b0b307208b6bccf4be80d58a27[/URL]

Looks like this Vantage model is advertizing 0.2dB..?

(just edited the link - I'm unsure if we are allowed to post links..? Have seen others substituting letters in a link - is it supposed to be like that..?)
there are 0.1db,0.2db,0.3db,0.4db,0.5db,0.6db LNBs available. It doesn't necessary means that a 0.1db is better than a 0.3db even with higher amplification. As long as I know the Invacom has the best LNBs which are all 0.3db specially in low signal and rainy areas
 
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