nhulst:
Thank you for your info. I think you're correct. I did some research and found that channel 2-13 are the same for OTA and cable but the other channels are different.
I think the problem was the hotel used cable but the TV's like other older TV's cannot accept higher channel than 64. My
modulator only use channel 65 and up so it did not work.
I think I have to buy a common modulator that use channel 3 and 4 for the older TV's because I could not find a way to swich the TV to OTA.
Thank you again.