I capture a lot of live TV. My analog cable signal is pretty bad, especially for the higher channel range. A few months ago I decided to try Time Warner digital cable and hooked up their converter box to my 34" HDTV using the 25-pin DIN and a good cable. The HD channels were spectacular (as expected), but the reception on the other channels was actually worse than without the converter, so I took everything back.
I expected the digital converter box to clean up the signal a bit for the non-HD channels, but that was definitely not the case. Moreover the sound volume was greatly reduced when using the converter box. I wasn't expecting HD-quality on non-HD channels, but I was hoping for a cleaner signal.
Was I misguided, or did I just get a bad converter box?