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Sky Digital BSkyB, Freesat & Saorsat support forum
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<blockquote data-quote="Branta" data-source="post: 627413" data-attributes="member: 316576"><p>It's time to update my experiences with the stacker/destacker, because I suffered a failure. Well, it was probably always faulty, but it took the warm weather to show up the fault.</p><p></p><p>Global Invacom were very helpful indeed, sent me a replacement unit and I returned the dodgy one, and they duly sent me a copy of their engineer's report of the fault (poor solder joint).</p><p></p><p>But the main reason for posting again is that I learned a something more in my correspondence with them that probably should be in the instructions.</p><p></p><p>Without the included power supply, the Destacker will attempt to power everything (itself, stacker and however many LNBs you connected at the stacker - 2 in my case) from the receiver's LNB connections. This can be too much for some receivers. Especially as you might use the stacker/destacker to serve two receivers, but turn on only one of them.</p><p></p><p>My IPBOX is rated at 400mA per tuner, and I have reason to believe that (with the first stacker/destacker that I had, and the power saving scheme I had implemented whereby the AC power was switched on only when the receiver is on) then the LNB supply at one tuner input was actually collapsed with the overcurrent requirement during the fraction of a second that it took before the AC power supply took over, and then did not automatically re-establish itself. Of course if you just leave the stacker/destacker on AC power whether or not the receiver is on, then this can't happen, but at 9W drain this is a bit of an expensive option.</p><p></p><p>Happily it just doesn't happen with the replacement unit, could be it's just got a fractionally lower power requirement, or maybe I imagined it all, can't be sure at this stage. I'm just happy that it's all working well again.</p></blockquote><p></p>
[QUOTE="Branta, post: 627413, member: 316576"] It's time to update my experiences with the stacker/destacker, because I suffered a failure. Well, it was probably always faulty, but it took the warm weather to show up the fault. Global Invacom were very helpful indeed, sent me a replacement unit and I returned the dodgy one, and they duly sent me a copy of their engineer's report of the fault (poor solder joint). But the main reason for posting again is that I learned a something more in my correspondence with them that probably should be in the instructions. Without the included power supply, the Destacker will attempt to power everything (itself, stacker and however many LNBs you connected at the stacker - 2 in my case) from the receiver's LNB connections. This can be too much for some receivers. Especially as you might use the stacker/destacker to serve two receivers, but turn on only one of them. My IPBOX is rated at 400mA per tuner, and I have reason to believe that (with the first stacker/destacker that I had, and the power saving scheme I had implemented whereby the AC power was switched on only when the receiver is on) then the LNB supply at one tuner input was actually collapsed with the overcurrent requirement during the fraction of a second that it took before the AC power supply took over, and then did not automatically re-establish itself. Of course if you just leave the stacker/destacker on AC power whether or not the receiver is on, then this can't happen, but at 9W drain this is a bit of an expensive option. Happily it just doesn't happen with the replacement unit, could be it's just got a fractionally lower power requirement, or maybe I imagined it all, can't be sure at this stage. I'm just happy that it's all working well again. [/QUOTE]
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