Warner QUBE here in Pittsburgh. Was the only way to get the channel count up in the 90's using circa 1980
analog technology. If you had the QUBE converter it switched to the higher tier automatically and you did not
notice. But if you were using a cable ready set or a VCR you had to go out and buy an A-B switch. TCI and
its successors continued to use Cable B until around the year 2000.
If you had the TV my granddad had a Zenith 25" Console set made in 1987, you had a box on the back that let you hookup 4 coax inputs to it, and by pressing ANT on the set or the remote, you could get all the channels (non scrambled ones of course)