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DISH SETUP: Single sat, Multi-Sat & Motorised
Motorised dish not moving with lnb plugged in
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<blockquote data-quote="a33" data-source="post: 1065186" data-attributes="member: 332642"><p>If there are just diodes involved in this circuitry, I cannot imagine a priority for port #1 (whichever port that might be, without any indication on the LNB outside). I wouldn't know how to get that, with just using diodes; at least transistors would be needed.</p><p></p><p>I know for quatro LNBs, most of them can be powered through <strong>any</strong> port you like. Just a few types of quatro LNBs are powered through only ONE port, thus saving internal parts, and saving a bit of energy that way. In that case usually it is written on the LNBoutside, which port that is.</p><p></p><p>On Unicable/JESS LNBs I believe there also applies: the highest supplied voltage is the power-supplier. It must be, or the switching commands wouldn't come through.</p><p></p><p>For twin/quad/octo LNBs I haven't seen this tested, or seen circuitry diagrams. However I would think a diode circuitry (highest voltage wins) would appear much easier to me than a transistor-priority circuitry, as you describe. And I've never seen a quad LNB with an indication of "port #1", so why don't they indicate this? </p><p>As for functionality, there doesn't seem to be a priority order for the LNB outputs, afaik. If there is 13V at port #1, there would be no problem to get 18V-signals from other ports; and vice versa, I think.</p><p></p><p></p><p>So, have you tested this? Or circuit diagrams, which indicate this port#1-priority?</p><p>I'd be much obliged.</p><p></p><p>Greetz,</p><p>A33</p></blockquote><p></p>
[QUOTE="a33, post: 1065186, member: 332642"] If there are just diodes involved in this circuitry, I cannot imagine a priority for port #1 (whichever port that might be, without any indication on the LNB outside). I wouldn't know how to get that, with just using diodes; at least transistors would be needed. I know for quatro LNBs, most of them can be powered through [B]any[/B] port you like. Just a few types of quatro LNBs are powered through only ONE port, thus saving internal parts, and saving a bit of energy that way. In that case usually it is written on the LNBoutside, which port that is. On Unicable/JESS LNBs I believe there also applies: the highest supplied voltage is the power-supplier. It must be, or the switching commands wouldn't come through. For twin/quad/octo LNBs I haven't seen this tested, or seen circuitry diagrams. However I would think a diode circuitry (highest voltage wins) would appear much easier to me than a transistor-priority circuitry, as you describe. And I've never seen a quad LNB with an indication of "port #1", so why don't they indicate this? As for functionality, there doesn't seem to be a priority order for the LNB outputs, afaik. If there is 13V at port #1, there would be no problem to get 18V-signals from other ports; and vice versa, I think. So, have you tested this? Or circuit diagrams, which indicate this port#1-priority? I'd be much obliged. Greetz, A33 [/QUOTE]
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DISH SETUP: Single sat, Multi-Sat & Motorised
Motorised dish not moving with lnb plugged in
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