Signal differences between LNB's

[tech1010]

Re: Signal differences between LNB's

Lnb is an important factor.. It is very challenging to get 13deg in our locations yesterday while fine tuning the dish i just changed the Lnb. Signal increased by chaining lnb was 7to 10 percent..

[zoran89]

Re: Signal differences between LNB's

You can increse or decrese signal with placement of your LNB. It makes diference if you put your lnb all the way to the head or base of LNB. also skew makes diference.
So it doesnt mean that you buy better LNB maybe you just setup him better.

[Teranoz]

Re: Signal differences between LNB's

Actualy it is quite easy to setup motorized dish. You just need to know your latitude and longitude, and what is your primary satellite.
First time I done motorized dish it was perfect i can get from 45E to 30W and I didnt try any more.

I used to have a motorized dish with polarmount that would take hours to get the right way of finetuning to be able to receive all sats. Two millimeters more up, checking all sats, three millimeters left, rechecking.... etc. With digital sat its even more difficult to get them all than with analog signals.

[zoran89]

Re: Signal differences between LNB's

I realy dont know what is difficult. I setup few of them and every time from the frst time.

You need to set motor on 0, and fix it to the motor. Then your tune your satellite, but you need to turn whole motor not just dish.

[rizwan]

Re: Signal differences between LNB's

I used to have a motorized dish with polarmount that would take hours to get the right way of finetuning to be able to receive all sats. Two millimeters more up, checking all sats, three millimeters left, rechecking.... etc. With digital sat its even more difficult to get them all than with analog signals.

Its 100% correct, when you located in fringe reception Area

[Teranoz]

Re: Signal differences between LNB's

Well, since I am using a load of switches I would not want to go back to the motor.

[rizwan]

Re: Signal differences between LNB's

Few dishes separately Installed is much better as a Dish with Motorized, You never get a good result from all satellites , A dedicated Dish give nice result

[zoran89]

Re: Signal differences between LNB's

Few dishes separately Installed is much better as a Dish with Motorized, You never get a good result from all satellites , A dedicated Dish give nice result

Few dishes?

You just need to instal motor properly and you will not have any problem.
By the way, motorized sistem usualy give more db then regular sistem...

[kalpikos]

Re: Signal differences between LNB's

...By the way, motorized sistem usualy give more db then regular sistem...

Why this happens?
Could you explain it?
I was thinking exactly the opposite...,
that a motorized system get less db because it can't be 100% focused to all satellites, as a fixed dish can do.

I understand that you can align very well a dish but not to all satellites.
That's I say that a motorized system can't have better signal that a fixed system.

[pat3]

Re: Signal differences between LNB's

Without motor you have one part less to adjust. So you have one part less which may cause signal degradation.
In fact without motor you should have better signal.

[zoran89]

Re: Signal differences between LNB's

Here are some testing. This is not my test, but I know who did it...

Thor
Frekv: 11278-24500 V
Program Cmore hits

Lnb-Nytrobox 0.1 rezultat (8.16Db)

Lnb-Inverto White tech 0.4 rezultat (8.75 db)

Lnb Sti model EHKF 0.3 DB rezultat (9.96db)

Lnb OPTICUM micro gold 0.1 db rezultat (9.37 db)

Lnb Inverto eco 0.1 db rezultat (8.61db)

Lnb Inverto Black ultra hg 0.2 db rezultat (10.16 db)


--------------

SIRIUS

Frekv. 12054-27500 V
Program -VIASAT FILM DRAMA



Lnb-Nytrobox 0.1 rezultat (6.62 Db)

Lnb-Inverto White tech 0.4 rezultat (8.10 db)

Lnb Sti model EHKF 0.3 DB rezultat (9.03db)

Lnb OPTICUM micro gold 0.1 db rezultat (8.48 db)

Lnb Inverto eco 0.1 db rezultat (8.15db)

Lnb Inverto Black ultra hg 0.2 db rezultat (10.31 db)



Thanks to Beli...

[kalpikos]

Re: Signal differences between LNB's

@zoran89
If I understood well, this is a test between different lnbs....
and of course there are many diferences...

but you don't explain your statement,
why a motorized system can get better signal than a fixed dish.

[Teranoz]

Re: Signal differences between LNB's

Why this happens?
Could you explain it?
I was thinking exactly the opposite...,
that a motorized system get less db because it can't be 100% focused to all satellites, as a fixed dish can do.

I understand that you can align very well a dish but not to all satellites.
That's I say that a motorized system can't have better signal that a fixed system.

Not true, only for offset and primefocus dishes.
Wavefrontier dishes are multi-focus and can get the best signal for all positions

[zoran89]

Re: Signal differences between LNB's

@zoran89
If I understood well, this is a test between different lnbs....
and of course there are many diferences...

but you don't explain your statement,
why a motorized system can get better signal than a fixed dish.

I didnt see, it is easy to explain.

Your LNB in centre have best possible signal, but only at first and if it is perfectly align. After some time your dish will move a bit and it wont have best possible signal any more.

Next, LNB next to it doesnt have so great signal, and LNB 20° left or right have very poor signal if any.


With motor, If my dish move in some time due to the weather, I can move my motorized dish for 0.1° and realign it.
Also I can have great signal on 30W to 45E and more with one dish. With multilnb system you need 2 dishes at least 100cm big, and signal on end LNB will not be great...

[rizwan]

Re: Signal differences between LNB's

When you compare it on motorizes Dish from Satellite to satellite it never give you 100 % on every Satellite as a dedicated dish getting