Originally Posted by WillieAntenna
Interesting to see that the 240 had a control for the smart antenna. I have heard the term but never understood what it was all about and I just look it up and it very interesting feature to have up to 4 antenna and it automacticly click on and off each antenna and control the gain. When that going to come out ?
So is the ATI-260 is consdier as 6th gen chip ?
ATI Xilleon and Theater would probably be called "5th Gen"....like other recent chips.
Where "5th Gen" means they 1) "meet" ATSC A/74 Receiver Performance Guidelines,
2) accommodate +/- 35 usec (or even better +/- 50 usec) multipath capability and
3) successfully decode (most??) of the "Field Test Ensembles".....which were
captured from problematic locations, but apparently have problems in some of the
captures and may never be fully successful.
The "3rd Gen" chips could not handle pre-echo, where the direct path signal is
greatly reduced (e.g. going through a building) and the delayed signal bouncing
in from the side is stronger.
PS: The "Generation" names came from successive Zenith chips....
But it's tough to compare performance cuz no one is testing production units
where they name the manufacturer.
I posted some named and unnamed test results in the 5th Gen thread:http://www.avsforum.com/avs-vb/showt...RA#post7024579http://www.avsforum.com/avs-vb/showt...RA#post6384680
Note that Samsung's Prototype Receiver, with so-called "Gemini" chip (ATI Theater? Xilleon?)
and Alps tuner far outperformed LG/Zenith's 5th Gen Prototype Receiver (2 years earlier),
esp wrt short delay, nearly equal strength multipath.
(Strange, cuz pre-5th Gen LG and ATI chips claimed zero delay multipath performance.)
However, we never saw CRC type tests for production units from any manufacturer.
In that same thread, I also posted the (one and only) on-air test report for the
(one and only) Smart Antenna, as controlled by the (one and only) OTA STB,
with 3rd Gen ATI NXT2004 and an EIA/CEA-909 Smart Antenna Interface:http://www.avsforum.com/avs-vb/showt...ia#post5979741
BTW: The ATSC Decoder chip only provides info re quality of the signal,
it's still up to the STB to actually control the Smart Antenna.
Many (non-LG) ATSC Decoder chips claim they "support" EIA/CEA-909.
When I talked to LG rep at CES2007, he was very negative wrt to how many
people would use (or "need") a Smart Antenna....so I bent his ear for awhile....
For what it's worth, Smart Antenna Interface is still optional for the SD-only STB
under the Dec2008 NTIA coupon program.
Here is more info re Smart Antennas:http://www.avsforum.com/avs-vb/showt...00#post5826625http://www.avsforum.com/avs-vb/showt...io#post5842783http://hdtv.forsandiego.com/messages...html#POST27838
If you read up from the last post, you'll find discussion re FM Diversity Combiners.
Right now, the DTA-5000 is limited to sub-urban environments, performing about
as well as a 4-Bay, and since it has built-in, variable gain Preamps may (or may not)
have desensitization/overload problems with very nearby transmitters.
I would like to see a Smart Antenna Combiner that would work with EXTERNAL antennas,
so the user could point them to receive stations from different directions (like San Diego!!!),
or could use an array of two to four hi-gain outdoor antennas, pointed as necessary
to optimize performance for the local situation.