When orientating a dish towards a satellite, I used a Satfinder ref. 7301.
Even when the position of the satellite dish allows a maximum signal reading, some of the channels that I receive still transmit noise (sparklies).
First make sure that the size of your dish is adequate for the area where you are living.
You must also take into account that the dish adjustment does not only consist in setting up the elevation and azimuth parameters.
A very important parameter is the LNB skew.
This skew will help to discriminate between the polarities transmitted by the satellite.
In order to adjust the skew: