On Thu, 15 Apr 2010 10:45:16 -0700, E27002 wrote:

All US TV is now digital.

Actually, not all US terrestrial television is digital.

There are still some Class A, Low Power, and Translator stations
continuing to broadcast analog television and the FCC has not yet
finalized a date for when these are to be converted to digital.

http://www.fcc.GOV/cgb/consumerfacts/DTVandLPTV.html

Also, is it not the case that there are still a few cable operators
distributing cable tv by analog cable transmission?

I do not know how the local TV stations deliver their signal the
Cable Company.

It all depends on the local TV station and the cable company.

As you say, in some cases there is a direct feed from the TV station
to the cable company, whereas others are received off air.