I don't understand the concept you are describing. My TV is always set to "normal". All the other settings are variations of "stretch and zoom". These alternate settings on my TV are labeled with words like "wide", "enhanced wide", "partial zoom", and other meaningless stuff like that. What do you usually keep your TV set at, such that you have to "change it back to normal" to fix these differently distorted pixels (PAR?) you're talking about? Doesn't everybody concerned about OAR always leave their TV set to "normal" in the first place? I must be missing something.
Well, that's just how it's labeled on mine...
If you feed a natively 4:3 source to your TV...like a VHS machine...what do you set the aspect ratio at?
On mine, you set a 4:3 source to "normal" and a widescreen source to "wide". Those two settings simply change the pixel aspect ratio back and forth.
There are other settings...mine are called Zoom and Panoramic.
Zoom is a zoom, obviously. I use this occasionally on letterboxed 4:3 programming, such as old DVDs that weren't made animorphically. It SHOULD take a standard 16:9 letterbox and zoom in to fill the screen completely.
My TV doesn't do "Partial Zoom", but of course the DISH receivers do. I've never been able to figure out the point of this setting. It distorts the picture, and I don't use any setting that distorts.
Panoramic is like "Stretch-O-Vision", and is probably what your set calls "Enhanced Wide." I avoid this like poison.
Anyway, since I only feed the TV widescreen sources...a DISH 622 and a DVD player...I leave it set for "Wide". HOWEVER, with the DVD player, I often have to switch it back to "normal". For example, DVDs of 4:3 TV shows need to be "squished" back up. In the past, I have never seen a reason to use this 4:3 setting for DISH, because the DISH receivers matte 4:3 channels properly. But with PAR adjusted up-converted HD, it's now a necessary setting to KEEP upconverted programming OAR. (Or rather, to change it BACK to OAR.)
It just occurred to me that this may not be possible with HDMI. I've had a 622 and a 942 and the HDMI never worked on either one. I am using component inputs for everything. Perhaps this is only possible with an analog input.
It would be lovely if DISH would add this feature, then it would work with every TV for sure.