question about signal strength

[VOLBEAT]

I have Directv and recently did the HD upgrade, and so they came out and put up the triple lnb dish and gave me the new receiver. The guy put the new dish on the old mast(which I know was perfectly plumb and level when I did it a long time ago), and used a meter to dial in the signal. When he checked the strength on the tv, 2 of them were in the 80's and one of them was in the low 70's(can't remember which one). I use 101, 110, and 119, by the way. Anyway, he said the one that was low was the weakest one anyway, and in the 70's was fine. Now I've been told that you won't see a difference in picture quality from the 70's to the 90's, but when there is a big storm or other interference, you have less chance of losing the picture if you're in the 90's. Is this true? Another thing is I went up and checked the mast he put the dish on, and it isn't perfectly plumb and level anymore, but was also told that it's only real critical when doing the dish yourself the old fashioned way with getting your numbers by punching in your zip code on the tv,because those numbers won't work without the mast being perfectly plumb and level. So as long as the guy got it with his meter, am I o.k.? I'm just checking because we just got a new DLP 50' tv and I want everything perfect. Thanks in advance for any feedback.

[durl]

True, signal strength is not an indicator of picture quality. The quality is the same whether your strength is 70 or 100. A stronger signal means you'll have less chance of signal fade when high clouds block the path to your dish. Unless you have something blocking your dish, a signal of 70 on a clear day wouldn't be acceptable to me. It should be stronger.

Not making the mast plumb sounds like cutting corners to me. It's not difficult to make sure it's plumb while you're setting up a dish. I'd get the mast plumb and then re-aim and see if you can do better than 70 or 80. It's worth a shot.

Some who are more educated on the details of each satellite might be able to give you more detailed information on which ones are weaker than others and if low-70s is acceptable.

[VOLBEAT]

I just checked my signal strength a minute ago, and it shows satellite A, B, and C.....don't know what numbers they correspond to. I know I get 101, 110, and 119.