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4-satellites to 1 receiver
4X1 DiSEqC Switch Diagram
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Note, that all the diagrams above that show the use of
a multi-way switch uses a dual LNBF. In order to understand the
need to use a dual LNB with a multi switch, you must know that the
satellite signal broadcasting from the satellite broadcasts in two
different ways. Either Horizontal & Vertical for FSS FTA or Right
Circular & Left Circular for DSS. Horizontal and Left Circular
operate on 18V DC and Vertical & Right Circular operate on 13V DC.
When you use a multi-switch, the input ports for the LNB is marked as
13V or 18V. If you only use a single LNB and run your one
cable to the 13V port, you can only get channels that are broadcasting
on Vertical or Right Circular. If you install it on the 18V port,
you can only get signal from Horizontal or Left Circular transponders.
When you use a dual LNB, one port will provide Horizontal or Left
Circular, the other provides Vertical or Right Circular.
What is the difference between a Linear and Circular LNB?
This has to do with the way the signal is transmitted
from the satellite in the sky. There are two different ways that a
satellite can broadcast its signal. If linear, it broadcasts
Horizontal and Vertical. If circular, it broadcasts Right Circular
and Left Circular. To understand this better, imagine the signal
coming in like a screw that's turning left or right.
How do I know if I need a linear or circular LNBF?
Click Here or go to lyngsat.com and choose the satellite you are
trying to pick up. Under the transponder frequency column (Freq.
Tp) you will see a letter next to the frequency. If the letters
used are R or L (Right or Left), then it's a circular broadcasting
transponder. If you see the letters H or V (Horizontal or
Vertical), then it's a linear broadcasting transponder.
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