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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Multiswitch advice
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<blockquote data-quote="Captain Jack" data-source="post: 1154866" data-attributes="member: 243342"><p>I am a newbie to the multiswitch territory but I've got a Vision multiswitch with an Inverto quattro LNB. All connected up but I am a bit confused as to what various dB readings mean.</p><p></p><p>First is max B/A gain. My Ku LNB is connected to the A ports, so I am looking at max gain of 10dB or 8dB depending on which receiver port I am connected to. </p><p></p><p>In addition there are adjustable "pots" for each of the inputs, which I gather change the "gain", between 0dB and 8 or 10dB ?</p><p></p><p>My confusion lies in the fact that to get maximum SNR reading on the receiver, I have to turn the gain to the minimum. I would have thought that with a ~35m cable run, I would need to turn up the gain even a little but looks like not? Why would increasing "gain" reduce SNR? Is it because on adding gain I am also adding noise?</p><p></p><p>Confused... </p><p></p><p>[ATTACH=full]153067[/ATTACH]</p></blockquote><p></p>
[QUOTE="Captain Jack, post: 1154866, member: 243342"] I am a newbie to the multiswitch territory but I've got a Vision multiswitch with an Inverto quattro LNB. All connected up but I am a bit confused as to what various dB readings mean. First is max B/A gain. My Ku LNB is connected to the A ports, so I am looking at max gain of 10dB or 8dB depending on which receiver port I am connected to. In addition there are adjustable "pots" for each of the inputs, which I gather change the "gain", between 0dB and 8 or 10dB ? My confusion lies in the fact that to get maximum SNR reading on the receiver, I have to turn the gain to the minimum. I would have thought that with a ~35m cable run, I would need to turn up the gain even a little but looks like not? Why would increasing "gain" reduce SNR? Is it because on adding gain I am also adding noise? Confused... [ATTACH type="full"]153067[/ATTACH] [/QUOTE]
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Satellite TV receivers & systems support forums
DISH SETUP: Single sat, Multi-Sat & Motorised
Multiswitch advice
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