- Joined
- Jan 1, 2000
- Messages
- 16,233
- Reaction score
- 4,202
- Points
- 113
- Age
- 81
- My Satellite Setup
-
Triple Dragon, Dreambox 8000, Echostar AD3000ip, TBS6522,6925,6983 PCie cards.
Gibertini 1.25m motorised dish driven by the AD3000, with either Inverto BU Quad or Norsat / XMW Ka LNBs . SMW 1.05m + 3 other dishes. Speccy: Promax HD Ranger+
- My Location
- The Flatlands of East Anglia
nopfusch, I assume you are on a vertically polarised TP with no adjacent horizontal channel on that frequency to cause cross polarisation.
First off, twisting the LNB 180 degrees merely returns you to the original polarisation.
Here's my hypothesis which may explain why you still receive a good picture (assuming the signal is a good one, and assuming, as above, that there is no adjacent horizontal channel on that frequency. Only a theory, mind, may not explain your problem) -
Your LNB was -45 degrees ccw to start with. You rotated it +90 degrees, which would still be only 45 degrees off vertical, the same as the original position wrt 0 degrees, giving you the same signal strength.
Twisting the LNB 180 degrees ccw is the same as leaving it in your last position.
This of course only holds true if you were originally at -45 degrees (or thereabouts).
Perhaps my angular theories aren't correct, in which case someone may be able to enlighten me?
Llew
First off, twisting the LNB 180 degrees merely returns you to the original polarisation.
Here's my hypothesis which may explain why you still receive a good picture (assuming the signal is a good one, and assuming, as above, that there is no adjacent horizontal channel on that frequency. Only a theory, mind, may not explain your problem) -
Your LNB was -45 degrees ccw to start with. You rotated it +90 degrees, which would still be only 45 degrees off vertical, the same as the original position wrt 0 degrees, giving you the same signal strength.
Twisting the LNB 180 degrees ccw is the same as leaving it in your last position.
This of course only holds true if you were originally at -45 degrees (or thereabouts).
Perhaps my angular theories aren't correct, in which case someone may be able to enlighten me?
Llew