35-1 is just the remapped channel, it is actually on channel 26.
PSIP is the program responsible for remapping the channel so ATSC tuners tuned to channel 26 will report they are on 35-1 (or 35-2 or 35-3).
If PSIP crashes, the ATSC tuner tuned to channel 26 will report it is on 26-1 or 26-2 or 26-3 etc.
It's not that common for most stations, more common with others.
Depends on the stability of their PSIP computer and how often someone checks on it to make sure it is working.
We had one station here that didn't quite understand the nature of digital TV was waiting till right before primetime to turn on the PSIP computer, then turning it off after primetime was over, since this was the only time of day they were airing HD material.
I had to double up my season passes for all CW programming.
One SP for 30-1, and another for 48-3, their actual frequency.
phox
PSIP is the program responsible for remapping the channel so ATSC tuners tuned to channel 26 will report they are on 35-1 (or 35-2 or 35-3).
If PSIP crashes, the ATSC tuner tuned to channel 26 will report it is on 26-1 or 26-2 or 26-3 etc.
It's not that common for most stations, more common with others.
Depends on the stability of their PSIP computer and how often someone checks on it to make sure it is working.
We had one station here that didn't quite understand the nature of digital TV was waiting till right before primetime to turn on the PSIP computer, then turning it off after primetime was over, since this was the only time of day they were airing HD material.
I had to double up my season passes for all CW programming.
One SP for 30-1, and another for 48-3, their actual frequency.
phox