Broadcasting a signal by bouncing it off of a satellite is expensive. Satellite providers try to squeeze every ounce of usable bandwidth from a satellite by polarizing the signal. By polarizing it, they can reuse a frequency a 2nd time.
Older satellites, such as the one Primestar use to use and the 2 Dish network currently use at 105° and 121° use orthogonal polarity, typically referred as horizontal and vertical polarity. Newer DBS satellites use a circular polarity, commonly referred to as left hand (clockwise) and right hand (counterclockwise) polarity.
All even transponders on a satellite correspond to a given polarity while all odd transponders correspond to the opposite polarity.
**Additional input for this FAQ was provided by drjim 
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by cdru edited by nozero
last modified: 2004-10-05 21:36:08 |
