Tuning SES 2 @ 87°W

[Magic Static]

There is a mystery I want to solve. Many of you have stumbled upon this. When tuning 87W there are wide variances in S&Q amongst the transponders. In particular, you tweak ME and THIS and loose RTV on 4080 or 3800. Or the other way around. Now this not what you would expect. I can get METV at 100%Q and not a whiff off RTV. I can get them all, but not as strong as tuning one individual transponder. I'm thinking this is brought out by some inaccuraccy in the dish assembly, ie alignment of the LNBF.
I've read many posts mentioning this problem but never saw one explaining what is happenning here. Could this be exaggerrated by dishes with low F/D ratio? Could there be a situation where say the Scalar ring is really not a constant, one size doesn't fit all? I'd like to nail this down. Do different frequencies take different paths along the same line? Things that make you go hmmmmmmmmmmm

[Scott Greczkowski]

Read my review of the new AI Turbo S2 meter... I had the same issue except I could not get a wiff of RTV on 3800.

Turns out after testing that my LNB was slightly off center, so by bending the LNB support arms a little now I am getting above 80 signal readings on most transponders on all satellites! Including a solid 85 on the RTV 3800 transponder (but not a peep on the 4080 transponder!)

[Magic Static]

Well like I said I can get them all inc 3800 & 4080. Not missing anything, just trying to understand the science behind this pheonom.
And I too am learning the AI TurboS2 nice meter! But I didn't get a discount on mine like you did

[ke4est]

I would like to know too. If I go out to the dish with my meter and tweek anything I can think of including bending the arm a bit to get 3800 I lose 4080 or vice versa. So weird!

[turbosat]

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Seems like all the different parameters of dish aiming have to be just right to get that satellite with high numbers of signal/quality. I get those RTV channels on both tps well, using a 10' Sami dish, without having to do any tweaking once I had a receiver that would pick up S2 signals. Polarity control seems to have a lot to do with it though, even if your dish is tracking well. Using old lnb with polarotor, I can bump the polarity just once and lose those S2 channels. They're really picky.

[signal.quest]

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This might be similar to my problem trying to get the CBS S2 TP's. I think I am tracking the ARC, but having trouble w/ high FEC S2 w/ 10 footer. Is the polarity most likely the problem compared to other settings? If so, I was thinking of trying an old LNB and polarotor. I have a Chaparral and old Analog receiver to mess with.