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<blockquote data-quote="dxsat" data-source="post: 934131" data-attributes="member: 193607">After using an Inverto Quad BU for a couple of years on my own 180cm, I recently returned to an Invacom QDF-031, which rejects the interference from the data transponder on 11008V more effectively. Until recently, most people agreed that the Inverto BU (Black Ultra) had the edge, but this appears to be no longer the case. With interleaving of strong Europe and UK beams, many large dishes are struggling to receive the adjacent BBC frequency of 11023. In my case, I was getting zero with the Inverto but now a good signal with the Invacom.No two installations are the same. The balance of weak/strong transponders varies on location, type and model of LNB, how old it is, and the receiver used.This issue is also akin to hitting a moving target, as a new transponder can throw out careful adjustments.Invacom's QDF spec is greater than 30 dB cross-polar rejection. If my maths is correct, this is around seven times higher than Inverto's, for which the manufacturer claims is 22 dB.Invacom LNBs also have a better balance between H and V polarities and should receive these in more equal proportions to other LNBs, which typically are down on one or the other.</blockquote>

[QUOTE="dxsat, post: 934131, member: 193607"] After using an Inverto Quad BU for a couple of years on my own 180cm, I recently returned to an Invacom QDF-031, which rejects the interference from the data transponder on 11008V more effectively. Until recently, most people agreed that the Inverto BU (Black Ultra) had the edge, but this appears to be no longer the case. With interleaving of strong Europe and UK beams, many large dishes are struggling to receive the adjacent BBC frequency of 11023. In my case, I was getting zero with the Inverto but now a good signal with the Invacom. No two installations are the same. The balance of weak/strong transponders varies on location, type and model of LNB, how old it is, and the receiver used. This issue is also akin to hitting a moving target, as a new transponder can throw out careful adjustments. Invacom's QDF spec is greater than 30 dB cross-polar rejection. If my maths is correct, this is around seven times higher than Inverto's, for which the manufacturer claims is 22 dB. Invacom LNBs also have a better balance between H and V polarities and should receive these in more equal proportions to other LNBs, which typically are down on one or the other. [/QUOTE]

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