LNBF Rotation

[ShaneLinder]

I don't understand a lot about the FTA system. We have one. I installed it but had to pay someone to come and point it at the AMC4 satellite for me.

I don't understand the role the rotation of the LNBF plays. If I did get a motor to move the dish from one satellite to another, wouldn't the LNBF also need to be rotated?

Since I live in the tip of Texas, just a few miles north of the Mexican border, I am on the edge of the footprint and, from what I understand, I need a motor, even with multiple LNBFs in order to pick up signals from more than one satellite.

 

[PSB]

Have a look here for info on skew........

http://www.satelliteguys.us/showthread.php?t=14702


http://www.sadoun.com/Sat/Installation/LNBF-Installation.htm

 

[N4ST]

I don't understand the role the rotation of the LNBF plays. If I did get a motor to move the dish from one satellite to another, wouldn't the LNBF also need to be rotated?

The rotation of the dish along the Clark belt will change the skew for you. If you stand in front of your dish and do the mental gymnastics of imagining it rotating to due south, you would see that your LNBF skew would become 0 when your dish is due south. Remember that the axis of this rotation is not vertical, it is tilted depending on your latitude. As you rotate your dish to the south it is also gaining elevation.