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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Muti LNB Holder
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<blockquote data-quote="Terryl" data-source="post: 1133990" data-attributes="member: 369937"><p>Not talking about the focal point, but the -3dB points on ether side of the focal point, this is the receive beamwidth of the antenna, this is where the receive signal falls to 1/2 of the calculated signal at the focal point.</p><p></p><p>Example: a dish centered to look at 16E with an LNB mounted to one side to look at 23E, and a LNB mounted on the other side to look at 13E would need a beamwidth of 15 degrees or more, (+- 7.5 degrees of center) this to ensure that the LNB for 23E would be far enough within the main signal pattern to have a reliable signal, as it's looking at a satellite that is 7 degrees off centre from the main satellite.</p></blockquote><p></p>
[QUOTE="Terryl, post: 1133990, member: 369937"] Not talking about the focal point, but the -3dB points on ether side of the focal point, this is the receive beamwidth of the antenna, this is where the receive signal falls to 1/2 of the calculated signal at the focal point. Example: a dish centered to look at 16E with an LNB mounted to one side to look at 23E, and a LNB mounted on the other side to look at 13E would need a beamwidth of 15 degrees or more, (+- 7.5 degrees of center) this to ensure that the LNB for 23E would be far enough within the main signal pattern to have a reliable signal, as it's looking at a satellite that is 7 degrees off centre from the main satellite. [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Muti LNB Holder
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