Tvheadend

I'm testing two backend, Mythtv and Tvheadend. I setup mythtv without issues and I can see all the channels and mapping them to scheduleDirect with no problem. I'm trying to setup TVHeadend on my Qnap. Unfortunately I can not seem to find the right frequency for the Verizon cable in Boston. Does anyone know what it should be?

Also while I'm scanning the channels, the web interface crash and I need to restart it, it is a hit or miss.

Thanks for your help.