I have recently started using a Motorola DCT3416 DVR for use with my Comcast subscription. I live in an apartment block that piggy-backs on the cable signal by adding some extra channels in to the plain old RF (analog) signal. I can pick these up by connecting the cable from the wall socket directly into the TV.
However, when connecting the DCT3416 in-line, the RF out on the back of it does not pass through the signal raw - instead, it seems to be an RF modulation of whatever the box is displaying at the time. What the point of that is I do not know; surely anyone with an HD DVR has a TV with at least component in?
Anyway, I was wondering if the box has some hidden feature to pass-through the RF signal - any ideas before I go out and buy an RF splitter and add to the cable nightmare that sits behind the TV?