Your LNB is marked with a label indicating the polarization tilt. Your local LNB polarity offset information varies by location. If you are in Houston, TX your LNB polarization is to be set at 0 degrees. But if you are on the California coast your LNB polarization could be as much as minus 30 degrees (clockwise rotation). And if you are in Maine your LNB polarization could be as much as plus 30 degree (counter-clockwise rotation). Peaking the dish and adjusting the polarity of the LNB will greatly improve your Signal Quality reading.
When adjusting your LNB, it's not going to be turned more than 31 degrees (unless you live in Hawaii). Also be sure you don't leave that LNB plastic bracket loose. The LNB won't pick up the satellite if the bracket is loose, and it's slightly off. Finally, when thinking about degrees, remember that 30 degrees is about 5 minutes on a clock. Don't turn the LNB too much!
Make certain that the pole or tri-mast assembly is vertically plumb. Check it with an Angle Finder or a level. If the pole or tri-mast is not plumb, your azimuth and elevation will not be accurate and will cause difficulty when pointing the dish. Also, if you are using a pole mount, make certain you pour a sufficient footing that will provide proper ballast. A pole that does not have sufficient ballast will lean over time, causing you to lose the signal. Your mount must be very strong and can not wobble. You must use at least 4 lag screws (correct size for your installation) in the base mount one on each corner.
When pointing the satellite dish, allow 5-10 seconds between any movements of the dish. This allows the receiver to complete a signal scan, and lock indicating that you have located the signal.
A reasonable signal strength is between 50 and 80. If it is lower than that range, you are either pointing into an object (e.g. trees, shrubs, or structures) or pointing above or below the satellite. Your antenna installation position must have a clear view angle of the satellite you are trying to receive.
There are other satellites within 2 degrees to the left or right that may use the same frequency. This will provide a strong signal strength reading but no signal quality or signal lock. If you have a high strength reading but are not able to lock on, try adjusting the dish slightly to the right or left.
When you are attempting to set up a satellite dish in a heavily wooded area or one with lots of man made obstructions, it helps to understand how the dish really works. One common misconception is that the dish points 'directly' at the satellite. This isn't the case for most dish designs. The apparent elevation of the dish is 15 or more degrees lower than it's actual receiving window. Have a look at this diagram.... it's easier to see it than it is to explain it.....
If you complete the above steps properly, your chance of a successful installation is 99.9%.
Be aware that when you have finished your mechanical installation and you are trying to aim your dish that the receiver waits about 3-5 seconds after it locks on to the correct signal before it registers on the receiver's signal meter on the antenna aiming screen on your TV. Move your dish in very small increments (2 deg East or West each instance until you find the signal then 1 deg to peak signal). If you move the dish too fast and do not pause between moves you might go thru the signal before the receiver can tell you that you are on the signal.
If you use a signal meter you can hook it into the system right at the dish and it responds to the signal immediately making it much easier to aim your dish. You do not need any one else to help you if you use a meter at the dish.
Polarization tilt applies to Linear LNBs not to Circular Circular: the electromagnetic wave is constantly rotating making it easier to latch its polarity Linear: must rotate LNB to obtain max level
However purpose of skew in Circular polarity applies only to multiple Satellites as to match alignment angle of telestars in their orbits to current location on earth. Each satellite is 23,000 miles above the earth at about 7000 Miles per hour creating a circular orbit path much larger than the earth circumference.
This is a good site with simple examples to follow: http://satcalculator.freehostia.com/
Lets say someone At Flushing, NY 11355 Trying to install: 97, 110, 119 97 is linear, 110/119 are circular
Another person same satellites in Los Angeles, CA 90032 Trying to install: 97, 110, 119 97 is linear, 110/119 are circular
Linear 97°W to 11355 Azimuth: 227° Elevation: 37° LNB Angle: 25°
Linear 97°W to 90032 Azimuth: 132° Elevation: 44° LNB Angle: -28° ------------------------------------------- Note LNB Angle is by rotating the actual linear LNB in its bracket holder to match correct polarity ------------------------------------------- Circular 110°W to 11355 Azimuth: 241° Elevation: 30° LNB Angle: N/A
Circular 110°W to 90032 Azimuth: 166° Elevation: 49° LNB Angle: N/A -------------------------------------------- If yo are getting both 110/119 then skew is a factor Circular 110/119°W to 11355 Azimuth: 246° Elevation: 27° LNB Angle: 123°
Circular 110/119°W to 90032 Azimuth: 174° Elevation: 50° LNB Angle: 87° --------------------------------------------- Keep in mind 90° is an upright for skew More than 90° is counter clockwise skew Less than 90° is clockwise skew --------------------------------------------- This is why I like that satellite calculator more than all the others Try the simple example yourself Yo'll be learning a new tip from KING
ds Tilt is the Circular Rotation of the Dish, like the steering wheel in your car. With a Motorized Dish you set the polarization tilt to "O" and leave it there, the motor will do the rest. There no need for you to attend school, you can learn all you want to know here. We are here just like Verizon 24/7.
BTW.... LK, above you say to have a look at this diagram......it's easier to see then explain???
Yo can tilt anything yo want doesn't mean it is doing anything
Motorized dish is mainly designed for linear polarity This is where tilt is critical Yo are using it for both polarities on your Invacomm
Try the example at this site http://satcalculator.freehostia.com/
So yo can get a clearer idea what I'm describing
I'm new to satellite myself We're just exchanging info I'm not being sarcastic But these are the things I just found out I picked this idea from someone here at this site about 2 months ago. I don't think he fully knew what he was talking about. I can't remember who but it was here at this site. And then someone else posted this site http://satcalculator.freehostia.com/ That is when it clicked to me
Hey, King What are you talking about? I don't understand what you are trying to say. Who in the world told you that a Motorized Dish is mainly used for Linear Polarity?
In order to learn about FTA Satellite hobby, it is very nice to read the posts on this forum and other websites. But on the other hand it is hard to understand unless you have a FTA not Pta System installed and do you own testing.
What I'm saying: - Tilt is critical for linear more than Circular - Tilt is not required to a Single Circular LNB - Tilt (Skew) is required to 2 or more Circular LNBs - Motorized dish mount compensates to tilt as if the mounted LNB is Linear. Skewing a single Circular LNB is irrelevant Most people put one LNB on a motorized dish mount Therefore tilting affect linear not the circular
- When yo put 2 Linear LNBs skewing entire dish is required - When yo put 2 Circular LNBs skewing entire dish is required
I wasn't talking about PTA or FTA I'm talking about 2 distinct types of LNBs Circular and Linear Each type and quantity got its techniques of rotation. Yo have to try the examples I gave above or non of this will make any sense ....Skew....
Let me add some Physics twist Circular TPs are 180/360 degrees phase shift apart Linear TPs are 90/270 degrees phase shift apart Don't waste your time to google this. Just keep it for future reference.
I never said you can't use motorized dish for Circular What I have been saying the tilt in the motorized dish is designed to accommodate the polarity for the single linear LNB. The tilt to a circular LNB is irrelevant. Most people put one LNB Dish won't know if it is Circular or Linear It does the tilt to help the Linear where as tilt won't hurt or help the Circular.
