Quote:
Originally Posted by
JoeKustra 
It sounds like you have a better understanding than I do. The Mag can only display .1 to .99, but it tunes my cable channels that all have four decimal places on most of my other A/V equipment. I also feel that the Mits TV is way ahead of its time in technology.
As for the PQ issues, I don't see them on my Sony EX700. Even if I did, I could adjust a zillion things per HDMI input. My test for good black level rendition is lapels on dark suits. They don't show with a bad black level. I used a cheap MS calibration disk to fix the OEM levels and the Mag works fine. I should mention that I record 480i digital content and I send out 1080p through a AVR that doesn't mess with the video. I use Sony DHG or TiVo for HD.
Almost forgot: the Mag says nothing on a dead digital channel. It says "scramble" when data is present but cannot be decoded.
Just noticed something. Main channel numbers are always 6MHz in bandwidth. My HD channels can have one HD and two or three SD subchannels. My SD only channels usually carry 10 or 11 subchannels. Music channels may have 40 to 50. If you have compressed more than 10 subchannels, the quality must really suck.
hi joe -
i'm no expert by any means, especially when it comes to DTV stuff... i do believe, however, that one can actually fit 2 ( i think ) HD channels into a single RF channel. if only 1 HD, then capacity across sub channels increases accordingly...
as far as the > .99 subchannel displays, i have yet to see ( or hear ) any active material on those higher decimal subs. in the mits, i can only tell that they're all on the same RF channel. the mits diagnostic screen for the tuner is limited in that it displays RF freq, modulation type, S/N ratio, and the fact that the tuner is locked on the RF channel. it does not give me any indication as to ' clear but no content ' or ' active scrambled content ', so it leaves me in the dark on that question...
cox crams 1 HD channel and several ( typically about 5 ) SD channels into the same RF channel, so bandwidth does suffer.
the black level issue with the Philips/Mag machines was thought ( by me ) to be a function of what was being delivered via COX.
however, further tests ( an OTA test using philips tuner ) yielded slightly better, but still washed out dark stuff on these machines, while my mits tv had no such washout. other tests included using an RCA OTA set top converter feeding both the Panny and the Philips. The panny also showed no washed out dark areas ( like the lapel sample you refer to ), indicating that the set top OTA box ( feeding DVRs via line inputs ) did a correct job for demod and video processing from dig to analog... however, the Philips still showed slightly improved, but still very washed out blacks...
so far, i have yet to be able to produce what i consider to be acceptable blacks ( near black to black ... almost no definition at all ) on either the Mag or any of the 3 philips machines... the panny E95 ( which is analog thru and thru ) always does a much better job with this...
i might add that i've gone through ALL of the various HDMI modes offered by the Mag, and have fiddled with calibration of the Mits to try to compensate ( mits has an extensive advanced video setup mode available ) for the lack of black level definition, but to no real avail...
after studying the schematics for the Philips machine, I can't locate anything staring out at me that's physically available to adjust ( or to change part values ) that might improve the thing, but i'm not quite done with that part of investigation. used to be one could trace an analog video path and fiddle with DC levels and gain in order to overcome such shortcomings, but so far, none with this modern machine... oh well...
sorry to have dragged this out. i know it probably belongs in the hi-tech suite... did it here in hope that 234 might take a look and maybe comment on the black level issue, since i believe there IS a discrepency going on as to IRE levels that differ between Japan and USA standards...
rgds,
ron g