Not long ago, I received two Channel Master CM-7000 converter boxes using my two coupons. Of course, my big reason for choosing this model was for the S-Video output.
For the most part, everything works well (using a Terk HDTVi indoor antenna for all my local stations 5-15 miles away) and provides a nice sharp picture on my 50" Hitachi CRT rear projection TV (except for the occasional fuzzy picture tune-in on standard-def sub channels, as other posts on this thread have already noted).
But here's the big problem with the Channel Master CM-7000 for those of you living in the Evansville, IN DMA (Designated Market Area): After a lot of research (as I will explain here), I have definitively concluded that this brand and model is incompatible with the digital signal from WTVW Fox 7 (listed as 7-1, operates in spectrum channel 28).
I have this hiccup problem (sound is interrupted, picture pixelates) sometimes as long as every 6 seconds but sometimes as often as every second (despite a signal strength of 100). This occurs with both of my CM-7000 converter boxes. I then decided to take this CM-7000 box and try it within a mile and plain sight of WTVW's transmitting tower, and still had the same hiccup problem with WTVW, while all other stations about 15 miles away worked just fine. And if that wasn't enough, I even went to Cincinnati where there's another station operating digitally in spectrum channel 28 (WPTO Think TV 14-1) and had no problem (and no hiccups) receiving this station with the CM-7000.
Then out of curiosity for the Sansonic FT-300A converter box, I decided to pick one up at Target and try it. This converter box works wonderfully on all my local channels (including WTVW Fox 7). And even though this box doesn't have an S-Video output, I still get just as sharp of a picture using composite video on my Hitachi 50" big screen with it's 3-D comb filter circuitry.
Needless to say, I will be providing all of this research to Channel Master and to the Chief Engineer of WTVW in an effort to try and fix this incompatibility issue.