To be a nice guy I will not respond to the post before yours!
I really was NOT confused, and really surprised by the poster before my previous post, I was referring to since he was obviously wrong
(I do not have a Hopper/Joey, I was posting for a very confused friend who does!) but I decided to reply as 'confused', which 'I' (I once was an computer designer-BSEE) was not to make sure of 'total transponder recording' vs some magical tuner crap (my friend was very confused!), which the clueless poster posted.
My friend ONLY has SD locals, no HD offered (Bend, Oregon) whereas I have the Portland locals (HD-8chs-722k), we are camping 200 ft apart.
I just verified that SD ONLY locals are supported for PTAT & he has recordings to prove it from few nights - He is new to Dish.
I suggested to him to change his locals to get HD but had to explain spot beams and having to change locals if you travel out of the spot, blah blah.....
He also had absolutely no clue how PTAT tech. works, I have now explained to him, showed him how to filter PTAT, showed him that he still has 2 tuners for man. timers, etc. He is even confused with simple timers, not a very bright guy, nice but Sara Palin clueless!
I am done with issue with him & now done with this post!

Adios Amigos!
PS: I am surprised with ONLY the 4 major locals for PTAT, no CW or PBS, etc being included as options for markets that have them. Future PTAT versions may be more versatile!
Thanks to all those with CORRECT answers!
James Long said:
Try not to be confused by the "wrong" posts.
DISH currently has their HD markets set up so all four major networks are in HD on the same transponder, making it easy to use one transponder to record all four major networks at the same time. The PTAT function takes advantage of this and records each evening's programming (within the user's settings for PTAT and availability of HD feeds in the market).
It appears DISH is preparing to extend PTAT to SD locals but I have seen no reports of PTAT working with SD yet. Extending to SD will help in markets where HD is not available and (with channel movements) where a major network is not in HD.
The PTAT function has changed since the Hopper was introduced earlier this year ... and the "technical understanding" of how it works is now better understood by people who have gone under the hood. But the basic description is the same: record up to four of the major broadcast network HD channels at the same time from one transponder for the duration of prime time.