How to align satellite dish

Published on November 07, 2015 . Updated on: -
After some unsuccessful tries to align a satellite dish do you think it's rocket science? Well, the calculations are difficult but the practical thing isn't. Despite what many believe, it is easy to align a satellite dish as long as you know the parameters than can easily be calculated online these days. Of course you are looking towards the sky, but you must be looking towards the satellite. This is not the usual practical guide to satellite dish installation. For that there are plenty of resources and video clips on YouTube. I'm gonna explain all the steps required to successfully receive signal from a satellite and explain why you do that and that. Everything from mounting the dish, connecting the LNB and receiver and looking for signal on the right frequency.

How to point the offset satellite dish

Where are the satellites

If you answered "on the geostationary orbit" you are right (note that we are talking here only about satellite TV and not other services that use different types of satellites). Now let's imagine that this orbit is a circle that you can see. How it would look as you would see it from your current position? If you look straight to north or south this is what it looks like.

geostationary orbit
How do you "see" the satellites
Don't take the above representation as accurate. It is there to show you some things:
  • The closer you go to the equator, the more you'll see of the "edges" of the orbit. It just gets higher and higher to the point of being vertically straight above you at equator.
  • The satellite that is on the same longitude as your current location is on the "top" of the orbit and it is the highest and most distant one. All vertical polarised signals coming from this one are vertical on earth too.
  • You see the other satellites that are not on the same longitude with you rotated.
Let's see what we got from this.

1. LNB skew

You should know that when you place the LNB in its holder you rotate it according to the satellite position. Why? Because you "see" the satellite rotated on the orbit if it is not on the same longitude with you.

The best thing is that you don't even have to skew the LNB. You could rotate the antenna. But how would you mount it now? Ain't it very easy to rotate the LNB instead of the antenna?

Rotated dish
If you want to keep the LNB straight, rotate the dish
But what is the value of the skew? The exact value can be calculated using The LNB skew is the least important parameter of your dish setup. It affects the quality of the signal but you still get something as long as your deviation is no more than 10 - 15 degrees from the correct value (as a side note, if you would rotate the LNB at 90 degrees multiples you would have to invert polarities in your receiver).

If you would be using a H-H motor, the motor will rotate the dish like you see in the above image, thus no LNB skew is required for H-H motorized offset dishes.

2. Elevation

Elevation is the parameter that affects the vertical angle of your dish. The closer you get to the equator it increases (it is 90 degrees at equator for a satellite that is on the same longitude with you). It also increase the closer you get to the satellite that is on the same longitude with you (this is the "highest" satellite on the orbit from your location).

This is a critical parameter. Do your best in trying to set it using the markers on the antenna mount. If you got it right, you're almost done.

3. Receiver

Before mounting the antenna on its pole, connect the LNB to the receiver. Turn on the receiver and look on no matter what satellite or frequency at the signal level. With a working LNB, a good receiver will always show some signal level and zero quality.

You don't need a satfinder (they only show signal level, it doesn't matter where it came from or what kind of signal is). We are only interested in signal level to see if the LNB is working, otherwise quality matters. This is what we want to get.

The next thing is to select the satellite you want to receive from the menu and choose a working transponder. This is very important because if you don't set your receiver to a frequency that carries the correct signal or no signal at all, you'll be wasting time pointing a dish that will never work.

There are plenty of satellite list sites, but I recommend:
  • satellite company own lists. For example, in Europe, Eutelsat offers its own channel list.
  • television sites that publish such kind of information.
  • third party lists, like are good if you look for an important television without any recent changes.
It is also very important that your receiver can handle the signal that is transmitted. Do not attempt to receive DVB-S2 with a DVB-S receiver. Avoid also PLS or other modulations than QPSK and 8PSK.

Receivers display signal quality in more than one menu. It is important to display it in the antenna setup menu, where it is updated more frequently and some receivers also have a sound indicator.

And at last, you must assure you can receive the desired satellite from your location. Satellite coverage maps are available online on satellite companies pages or on SatBeams Footprints. You will also find there an estimate of the dish size. Remember that always, bigger is better.

4. Azimuth

This represents the horizontal rotation of the antenna (left - right). You don't need compass for this one. Mount the antenna on the pole and slightly move it to the left or to the right. Slightly with no sudden moves. Some receivers have a delay time before they actually demodulate the signal and calculate the quality. If you are in a hurry you'll miss the signal.

Patience is the most important here. If you fail to get any signal and you are sure that everything is set up correctly, start tweaking the elevation. Cheap antennas have very bad elevation markers and it can become a hassle to get it right. Lower the elevation a bit, tighten the screws, then try again to move left-right. Failed once again? Set the elevation a little higher than it was initially and repeat the move.

Got the wrong satellite? Sometimes, you get signal on a transponder, but when you scan it there are completely other services than what you expected. You're on the wrong satellite but at least you managed to find one. If you could identify it by the name of the services that are broadcasting there it would be great.

Once you received one, the others are easier to find. You will know how to adjust elevation. If you're on a higher satellite than you wanted it's clear that you should lower the antenna.

After you got signal quality try to adjust azimuth for the highest quality level. Then tighten the screws because you're done with azimuth. Now you can try to improve the quality by readjusting the elevation and the LNB skew.

Good luck!


Here are some useful websites and Android applications.
Coverage maps:
Services lists:
Dish alignment calculators:
Android tools:
Have you ever pointed a satellite dish by yourself? What difficulties have you experienced?

From the same category:

Share this page:


Post a Comment

Please read the comments policy before posting.