6 replies to this topic

[ims]

There exist 2 calculators.  Extended calculator, simple calculator. What is better use for setting this dish ? Now i put LNBs for 23.5 - 0.8W only.

 

Count it as "The dish middle is between" or "The dish middle points at" (extended calculator only).  As I saw, extended calculator counts with altitude too.

 

I used "extended" calculator with "The dish middle points at" with 13E ( I am on 13,88) => LNB to position 0 at Hotbird, but the SNR results do not match the expectations on 23,5E f.eg. Strange, that I had correct real LNB positions than was counted position from calculator (cca 1-2 lines on a scale)?!

 

 

 

[Erik Slagter]

I never use such tools, it's rubbish, because the values they give are never accurate to the actual marks on the dish.

 

This is what I do, I put the amount of LNB brackets on the support that I am planning to use. Then the middle one I put on mark 0, or if there isn't a middle one (even number of LNB's) I fix one at -10 and one at +10. Insert the LNB's, add the cables but don't screw anything yet. Then, probably you'll know the coarse direction the dish should be pointed to (looking at other dishes in the neighbourhood, or you previous one), select a transponder your exepect and then simply turn the dish until a lock occurs. For smaller dishes I've even done it without mounting the dish, carrying it myself When lock, scan the transponder so you know you have the correct position. From that point you can optimise this LNB a bit (dish up/down, LNB skew). Now you can do the same with the two outer LNB's, but don't turn the dish, shift the brackets instead. When lock, turn the dish until both outer LNB's have max reception. When that's done, you can do the rest of the LNB's. It will probably take a few rounds to get it optimal, I do it once a year and then it takes a whole day to get them all right.

[gorski]

When I was setting up the dish, Satlex was quite useful as a starting point, from planning it all, to executing...

 

I planed the whole thing to have the most sensitive position in my centre (16E for me).

 

You don't need to put all LNBs on, but after nailing the centre/middle one, try the extreme ones...

 

It is crucial that the mast is spot on vertical, mind!

 

And good luck!

[Pr2]

It is crucial that the mast is spot on vertical, mind!

On a toroidal antenna you can tilt the antenna so perfect verticality of the mast is not mandatory, you can compensate it.
This is not the case with standard dishes.

[ims]

I used first params with calculator (13E on "0" and then added lnbs with satfinder - real positions are diferent than in calculator). Signal is not wrong, but it could be better.

 

I think, when will be better wheater, I will try with signal meter change global skew and then finetune lnbs again...

[eura]

I make a installations bouquet with the satellites that you like to have. Chose a channel for each satellites position. There is signal meters for enigma for Android and IOs chose one that you can change channels. Now you have a signal meter with you to adjust the dish. First set the center Lnb as the told you above. Then your end positions. East and west Lnbs. When all 3 Lnbs have good signal your dish have a good basic setting. Than you can chose the weakest channels at each position and place them in your bouquet to make the perfect setting.

[gorski]

 

It is crucial that the mast is spot on vertical, mind!

On a toroidal antenna you can tilt the antenna so perfect verticality of the mast is not mandatory, you can compensate it.
This is not the case with standard dishes.

 

 

Not my experience, as any such "compensation" meant a loss somewhere...