Ku linear vs circular LNB

[CRASHER]

HI,
I bought a linear LNB and a Ku dish for Intel805. After I realized that 805 is C band. Now I was wondering if I can use that dish for PAS1.
Checking their website, it says that a circular LNB is reqd.
Can I use the linear LNB for PAS1?

[Crow 492]

Here is the link for that ch list http://www.dssftp.com/forum/t46613--atlantic-true-free-to-air-channel-list-due-to-hi-demand-.html . SORRY CRASHER for that mistack. But yes that one you can and your dish and LLNB will work.

PAS 1R Right?

MORE INFO

Circular & Linear LNB's: What's the difference?

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OK everyone, put your polarizing sunglasses on.

What's the difference?
Answer: About -3dB or half the signal level.

Now take your sunglasses off. Notice how bright it is in here? The difference in brightness is an example of using the wrong lnb type.

Circular and Linear polarization refer to the characteristics of the radio wave that is transmitted by the satellite towards your dish/LNB. Below are links to visual comparisons of Circular (Left or Right-hand) and Linear (Vertical or Horizontal) polarization.
http://www.barco.com/projection_sys...r&circulair.jpg
http://repairfaq.cis.upenn.edu/sam/icets/VHB6-6.gif

Circular polarization refers to a wave of radio signal rotating in a spiral. This spiral can be rotating in either the clockwise ("R"ight-hand) or counterclockwise ("L"eft-hand) direction. Think of an approaching airplane as the plane's propellar is moving towards you.

The following example satellites (visable in N.America) are transmitting with a circular polarized signal:

EchoStar 3 @61.5°W http://www.lyngsat.com/echo3.html
Nimiq 2 @82.0°W http://www.lyngsat.com/nimiq2.html
Nimiq 1/3 @91.0°W http://www.lyngsat.com/nimiq1.html
EchoStar 6/8 @110.0°W http://www.lyngsat.com/110west.html
EchoStar 7 @119.0°W http://www.lyngsat.com/echo7.html
EchoStar 1/2 @148.0°W http://www.lyngsat.com/148west.html

How do I know they are circularly polarized?
If you click on any one of the links for the satellites above you will notice that under the first column labeled as "Freq. Tp" you will find one of the following single letter designations:

"R" = right-hand (=circular polarization)
"L" = left-hand (=circular polarization)

So what about linear polarization?
Linear polarization refers to a wave of radio signal rotating in a single plane. Think of an approaching helicopter as the helicopter's main rotor is moving towards you. It is rotating in a single, horizontal plane. The same approaching helicopter's smaller rear rotor is rotating in a single, vertical plane. In our satellite case it can be either in the "H"orizontal or "V"ertical plane.

The following example satellites (visable in N.America) are transmitting with a linear polarized signal:

SBS 6 @74.0°W http://www.lyngsat.com/sbs6.html
AMC 5 @79.0°W http://www.lyngsat.com/amc5.html
AMC 9 @85.0°W http://www.lyngsat.com/amc9.html
IA 6 @93.0°W http://www.lyngsat.com/ia6.html
IA 5 @97.0°W http://www.lyngsat.com/ia5.html
AMC 1 @103.0°W http://www.lyngsat.com/amc1.html
AMC 2 at 105.0°W http://www.lyngsat.com/amc2.html
EchoStar 9 @121.0°W http://www.lyngsat.com/echo9ia13.html

Again, under the first column labeled as "Freq. Tp" you will find one of the following single letter designations:

"V" = vertical (=linear polarization)
"H" = horizontal (=linear polarization)

Now that you understand the difference between the two satellite polarization types please put your polarizing sunglasses back on.

Hmmm, a little harder to read this right? Well, that's what happens to your receiver when you try to use a linear polarized LNB to receive a circular polarized satellite signal and vis-a-versa. About a 50% loss of signal!

Armed with the invaluable information you now possess, by using this link http://www.lyngsat.com/america.html you can determine for yourself what type of LNB you will need for each satellite.

If you need a circular polarized LNB look for words describing it as "DSS" or "DBS" or "circular" or a combination of these terms.

If you need a linear polarized LNB look for words describing it as "FSS" or "FTA" or "linear" or a combination of these terms (FYI: All Universal LNB's are linear LNB's).

There are also LNB subtypes such as dual output or quad output. I won't go into that here because there are several discusions on this forum as well as a FAQ dealing with those subtypes. I suggest you use the excellent search feature as well as spend some time reading the all important "Sticky" threads.

You can take your sunglasses off now.

SORRY CRASHER!

[videobruce]

What's more popular, right or left hand polarization or is that the same as asking vertical or hortizontal? :rolleyes:

[CRASHER]

What's more popular, right or left hand polarization or is that the same as asking vertical or hortizontal? :rolleyes:
You have to check for the freq. of the channel you want to watch, at lyngsat or any other.
I did not find any LNB which is compatible with both