Elliswr,
I am near Omaha and my longitude is 96.4°W, so I am quite close to your longitudinal position. I have always had troubles locking the RTV TP (11.734/11.735 with 4440-4444 SR) on 83.0°W and generally do so manually (none of my receivers blind scan and log this TP easily - including the Coolsat 5K and the AZBox Premium using a few different models of dish antenna). This has been a troublesome TP for me ever since RTV moved from 123.0°W to 83.0°W. Keep this information in the back of your mind as you will want to understand that not all of this trouble is your personal (human) error. There is just something odd about this particular transponder on this particular satellite. It has a long history of being ellusive for many FTA'ers.
I would recommend that you do NOT alter your dish and motor alignment (physically) to attempt to improve this situation. At least not at this stage. If you are confident with your dish and motor tracking of the entire arc, excluding this one particular satellite and transponder, then leave your alignment as-is for now. It is probably just fine.
I would recommend that you drive your dish to each of your main desired satellites across the arc and monitor the signal quality, record the readings, and then gently flex the dish ? ? ? ? . If you can improve the signal quality from the majority of all the other satellites by adjusting the dish aim in the same direction for every sat, then it would be beneficial to make a permanent adjustment. If by flexing your dish this way only results in a diminished quality from all the other satellites across the arc, then do not change your dish and motor's physical alignment. It is fine and you will then need to concentrate on other parameters to succeed in pulling in the RTV TP.
Here are some tricks that you can apply: Manually entering the TP data and adjusting the TP downlink frequency by 1 MHz steps up or down, adjusting the SR by 1 KS/s up or down. You can eventually find the "sweet spot" for your receiver using this method. With my Coolsat 5K, I was able to make even larger adjustments than a person would think were acceptable and I still retained the signal lock (or obtained the lock if I was seeking it). In other words, you have a large margin to play with and there is no set rule of thumb to apply here as there are just too many variables (slight differences in the LNBF's local oscillator frequency, the receiver's tuner, the downlink frequency, the angle of attack for the signal, the physical geometry of the dish reflector, the focal distance of the LNBF, a slight adjustment of the polarization of the LNBF, etc etc etc). You may also be able to alter the orbital position of the satellite in the menus, thus affecting only 83.0°W. You could re-enter this satellite as being located at 82.9°W or 83.1°W and serve the same purpose without affecting any other satellites in your list. Unfortunately, you cannot make a similar adjustment for the dish elevation without affecting the other satellites. The elevation adjustment is a purely physical adjustment to the dish and would affect ALL the satellites in your arc.
Currently, I am pulling in the RTV TP with a signal quality of 76%~82%. I have achieved up to 90%+ once, but that was a result of something that THEY did with their transmission signal and not anything that I have been able to reproduce since.
RADAR