Lemme try an analogy...
You have an FM radio in your car, and you are in Michigan.
You tune around the band, and find 10 stations. One if them is a rock station on 96.9 - you hear the call letters and the music format.
Now you drive to Nashville TN. Same radio, you "scan" the FM band and find differenet stations. On 96.9 you find a station, but it's hillbilly music.
Your car radio is nothing but a receiver. It did not know you drove from one city to another - it still picks up a signal on the same channel - 96.9 but in the different cities they have separete content.
Same with Sats. Your receiver can be set to a channel (example
IA5). You point up in the sky, but happend to line up on AMC2. You scan, find maybe 1 or 2 channels, but not what you expected to find on IA5. The receiver does not know you are on the wrong sat. THere is no correlation between what the receiver is set for, and the signal you happen upon.
The best way to handle this is to get close to a sat, using the measurements you calculate for your locaiton, and point to {hopefully} the correct sat. Get some signal and quality indication, and scan it in. Then you compare the channels received with what is listed on
www.lyngsat.com for the satellite you think you are on.
Example I like to use: Point at 79W (AMC5). There is a lot of strong transponders there, on 11742V when you get the picture working it's the Utah Eduction Network. If you dont see the Utah eduction channels, you are not on the right sat and you need to readjust or recalculate to make it right.
you need a good compass, and adjust for your magnetic deviaion in your caclucations on whtere to point your dish to get to certain satellites.
For my location, AMC5 at 79 is shown at 180 degrees for me. But I must add 10 degrees of magnetic deviation to get the true pointing compass setting to point the dish.
Study this page for a while:
http://www.sadoun.com/Sat/Installati...Calculator.htm
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