Howdy all,
Guess its time to put my .02 in here. First off, Thank You Gary for taking the time to post here with information and to ask for feedback. We very much appreciate your efforts to improve the quality of programming that we as FTAers have available. And i for one would like to thank you for giving a clue about what has been for me kind of a mystery, why one tp on a sat could seem so weak compared to others.
It makes sense to me that s.q. would go down if there is a lot of noise being picked up in the same frequency (or even a frequency that is close) from a tp on an adjacent satellite, especially on small aperature dishes. In looking at Lyngsat I can see that echostar 9 at 121 has a tp putting out on 11724 (vertical) while the tube is on g10 123 11720 (vertical).
Now, please correct me if i am wrong. We all know that there is variations in between various lnbs and recievers, so it makes sense that a small variation of 4 mhz could easily cause us to start catching a sidelobe off of e9 (121) 11724 (v) (a VERY strong signal) when we are trying to catch g10 (123) 11720 (v), hence causing a reduction in signal quality on 123 11720 (v) while signal strength is actually quite high on that tp. whew lol
BTW PSB, thanks for the link, it helped me visualize what is happening.
On a side note, I remember a thread from last year where a member was discussing how he was able to get a higher s.q. on the Tube by stepping frequency up and down on his reciever a little until he got the best quality.