By the way, since the Samsung measures quite a bit better than the LG in the CRC tests, I can only guess either of two reasons why it didn't do as well in Mark Schubin's apartment as the LG prototype: 1. This test unit wasn't the same one measured by the CRC, or 2. They also failed to use as good a tuner as evidently LG must have done. And on that last point, with the article from Digital TV Design Line in mind, I will guess that the tuners of all these "decent but not great" performing units do not have both the tuned RF amp stage and the "active image rejection," or perhaps a functionally equivalent dual IF stage, that the article calls for. To repeat that important paragraph: "Ideally the tuner should achieve a minimum image cancellation across its operation range of 72.5 dB and a minimum of 68 dB. This is extremely challenging using standard tracking filter techniques. To meet the requirement will either compromise the desired channel filter flatness or require additional tracking filter stages to achieve additional image suppression. Neither of these are desirable since the former may render the tuner performance unacceptable for other distribution means such as analog terrestrial or cable and the latter will involve additional design complexity coupled with increased manufacturing cost. These issues are potentially compounded when aging and temperature variation effects are considered. A solution overcoming these disadvantages is to apply active image cancellation within the tuner by using image reject mixer technology in the MOPLL section. With this approach it is feasible to achieve typically 30 dB of image suppression, which will ease the tuner tracking filter requirement to 42.5 dB. This helps lower manufacturing costs and is also far less susceptible to environmental aging." <http://www.digitaltvdesignline.com/howto/showArticle.jhtml?articleID=3D1= 7 3601582> or http://tinyurl.com/74ma2 (Sorry, but the tinyurl doesn't seem to work forme. Oh well.) Bert ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.