The Dude said:Well one summer years ago the DX was rolling and after my local channel 10 went OFF THE AIR,i noticed WHUC from rochester rolling in right on the cable network (300 miles) for about 3 hours basically 0db!! (For about 1 hour it was crystal clear (I watched 3 shows)),i wouldnt have been able to do that if it was all DIGITAL back then!!
The farthest Cable DX i ever got was Channel 17 from Phili (WPHL) .. I have that on tape still(After my local 17 went off)
That has nothing whatsoever to do with digital or analog. Years ago, cable companies picked up broadcast stations directly off the air. Nowadays they are usually fed directly from the stations via fiber or microwave link. When I watch KTVK Phoenix on cable, I am not watching an NTSC signal transmitted from South Mountain on 60-66 MHz or an ATSC signal on 530-536 MHz. Those transmitters can be completely off the air and it will make no difference to Cox Cable viewers in metro Phoenix.
I was able to see distant stations via cable as well when locals were off, but that was back in the '80s and early '90s.
Maybe some rural and/or small-market systems still get their stations OTA, but the bigger systems don't. And if that's the case, they'll pick up the digital feed rather than the analog, if they're not doing so already.