LNB Skew

[rruunneerr]

Hi,

can anyone shed light on what is meant by Skewwing your LNB in the hope of getting a better signal.

Does this mean turning the lnb? if so do you think you can improve your signal strength?

I currently get 86% with Canal Sport HD and around 81% for the other canal sport channels on Thor.

Is it possible to get a better signal strength?

I have a 1m dish (TM 6800) in the east midlands.

Thanks in advance.

[benny/9]

Hi,

can anyone shed light on what is meant by Skewwing your LNB in the hope of getting a better signal.

Does this mean turning the lnb? if so do you think you can improve your signal strength?

I currently get 86% with Canal Sport HD and around 81% for the other canal sport channels on Thor.

Is it possible to get a better signal strength?

I have a 1m dish (TM 6800) in the east midlands.

Thanks in advance.

*****************************************
thats exactly what it does it fine tunes the signal
when you loosen the clamp and turn the lnb very slightly left or right
for the strongest signal

[Sirus]

Can someone tell me this... Its the same sort of question only concerning when a motor auto skews the lnb when moving the whole dish

From what Ive been learning over the past weeks about all this... it says that from your location the sat your trying for depends on how much skew of the lnb, so the more a sat is in true south line of sight to you then the less skew if any skew is needed.. Right?

But why is it on dishpointer.com it says stuff like skew needed for 19E is -7 but then states -10 skew for 13E... so that would mean the further down the arc the more skew and the further up the arc back towards your due south the less skew..Right

So how can the above dishes be recieved properly in a motor config if the lnb needs to at -10 when at 13E the as your dish turns more torwards 19E it then says you need -7 skew (less instead of more skew)which is impossible for the motor to do if it can only increase the skew as it arcs..

Anyone make sense of this?

[C64]

My motor rotates the dish at the same time as it turns the dish so the angle of my LNB is skewed automatically as the dish turns to face the satellite.

[Sirus]

Thats excactly what I mean witchy.. the motor does all the turn changes the dish elevation and auto skews the lnb as it turns the whole dish at once.. a brill piece of emgineering

But going by dishpointers skew angles it doesnt seem to make sense on some sats your pointing at... the best way of seeing what i mean is to go to dishpointer and to your location then mimic your arc from there on their page... and go from your due south dish then slowly down the East side of the arc and watch the lnb skew each time

Theoratically from due south were your lnb is at 0deg skew then turning your motor east should and does skew your lnb anticlockwise and likewise for your lnb to skew clockwise when turning west

BUT when actually re-inacting your dish movements as if on a motor on dishpointer look at the skew angles required for both 19E and 28.2E they dont fall into the skew pattern of the more to the left the more skew.. infact as I was saying, 13E needs -13deg anticlockwise skew(from my location) but then going further to 19E only requires -7deg anticlockwise skew and further down the arc 28.2E requires -14deg anti clockwise skew... but all the sats beside and in between them all follow the natural skew where each one further down the arc requires more skew which makes perfect sense... but why 19E and 28.2E have a weird out of pattern skew which would be OK if just re ajusting a stationary dish from time to time but seems tofall out of skew pattern when a motor tries to track to them

Check it out at dishpointer, follow your arc and watch the skew turn weird for them 2 sats

[C64]

I see what you mean now mate.

It must be an error, either that or the satellites are in an incline orbit - which they aren't.

[.: JaCkPoT :.]

Or you can loosen the clamp and slide the lnb further in and out to also peak your signal...

[Sirus]

Damn..Turns out they are just typos for them skew angles on dishpointer.... i thought it was maybe an intended footprint area thing or something

I was trying a different satpointing site "Satsig" and it has more reasonable skew angles going down the arc

I only used Dishpointer for its big window and the little object line that tells you how high something has to be to obstruct your line of sight.....

Needless to say I wont be using it for reference anymore