Dish Alignment

Set up the initial position

Dish alignment can be difficult especially if the required signal is weak.  Follow these steps to set up initial position – azimuth and elevation, then use a meter to make fine adjustments to peak the signal

First check the dish size on the Footprint map for your satellite

Here the signal strength of 53dBW indicates that a 50cm dish is ok for the installation area see Chart

although the chart says 50cm always add a little to give a margin for bad weather,  so I will use a 65cm 

Go to Dishpointer.com to get the basic parameters for your location 

Latitude: 51.4832°
Longitude: -0.6019°
 
Dish Setup Data
Elevation:  26.9°
Azimuth (magn.):  150.9°
LNB Skew  -10.5° 

Set the Azimuth

If like the example above (Windsor Castle) you can line the dish up on a clearly visible target like the tree circled in red, then  that is the easiest method, Otherwise get a compass and mark the direction on the ground under the dish

Set the Elevation

The dish elevation scale is clearly set to 27 degrees

Now peak the signal with fine adjustments

If you have followed these initial steps the final alignment should be easy even with the simplest meter. 

With the best digital type meters more than one transponder can be tried and the dish peaked for the weakest signal

Finally - the Skew

Loosen the lnb clamp. 

The further away from south your satellite is ( our example is Astra 3 at 23.5 degrees east ) the more  skewed the dish should be. In practice most dishes are fixed, so the top of the lnb is turned towards the east until the meter indicates the best signal. The dishpointer skew guide is 10.5 degrees, if the lnb clamp is graduated then you can initially set this figure, then peak with a meter.

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