Analog NTSC still On-Air

[dtvmcdonald]

Most upper VHF and UHF DTV station allocations are for about the same PEAK
power for DTV as for NTSC, if they are on the same channel. The ratings
systems are different: NTSC is for sync peak, ATSC is for average envelope power.

Not so for lower VHF ... these were allocated lower power, and that was too low.
If they were the same power as high VHF they would work much better.
In fact, channels 4 and 5 might give excellent results. 2 and 3 suffer much worse
from impulse noise than even 4. 6 has the adjacent FM problem.

Doug McDonald