As I've mentioned before, the slickest solution to this issue, at least using 1983-era technology, was what the old American Cablevision in the city of Rochester used to do: they had the two-piece Hamlin converters with the slider across the front to change channels. But instead of going from 2-36, these boxes went from 3-37, because they had custom dial slides that were marked one channel higher than what the box was really tuning to. (Call it remapping, 1983 style!)
So when the box was displaying "8," it was really tuned to 7...and so there was no ingress issue on "8", "10" and "13."
The tradeoff, of course, was that anyone who had an early cable-ready TV had to subtract one channel from what was listed in the guide - and that "9", "11" and "14" on the system (really RF channels 8, 10 and 13) had to be sacrificed for text services, where the ingress didn't much matter.
But for 1983...well, it was the height of technical sophistication.
So when the box was displaying "8," it was really tuned to 7...and so there was no ingress issue on "8", "10" and "13."
The tradeoff, of course, was that anyone who had an early cable-ready TV had to subtract one channel from what was listed in the guide - and that "9", "11" and "14" on the system (really RF channels 8, 10 and 13) had to be sacrificed for text services, where the ingress didn't much matter.
But for 1983...well, it was the height of technical sophistication.