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Old 07-11-2007   #1
garym71
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Join Date: 08-08-2007
Location: South Oxfordshire, UK
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My System: Pace TDS470N Sky+ Receiver, Technomate TM-5400CI+ FTA Receiver, Raven Gemini 70cm Mesh Dish with East & West offset LNB brackets, 2 x MTI 0.2db Universal LNBs, MTI 0.2db Universal Quad Output LNB, Eurostar 4x1 DiSEqC Switch, Webro WF100 Cable
Channel 4 Breakup / Pixelation

At the weekend I replaced my Sky minidish with a Raven Gemini 70cm mesh dish. This is ultimately in preparation to mount some additional LNBs for other satellites but for the time being it is just set with a single ouput LNB pointing directly to 28.2E for my Sky receiver (a Panasonic DSB30). The LNB is an MTI 0.2db universal one.

It is only tonight that I have spent any real time viewing Channel 4 and I have noticed quite a lot of breakup / pixelation. This doesn't seem to happen on other channels I've tried. I'm based in the south of the UK and the weather outside is fine.

I set up the dish with a signal meter and it was pointed manually using azimuth / elevation angles that give the best signal stength on the meter. I also adjusted the LNB skew to get the the best signal I could. The Sky box signal test menu shows 100% signal strength and 80% signal quality which is the same as I had with the Sky minidish.

Is there something paricularly weak about the Channel 4 signal and is there anything I can do to try and rectify this problem? I thought the larger dish should actually make things better, not worse
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