Usually with ATSC channels there is a table called the "TVCT" terrestrial virtual channel table, which contains the names of the channels. In this particular file, it instead has a similar "CVCT" cable virtual channel table, which as the name suggests, is usually used with cable TV.
I've seen this before, and NextPVR on Windows handles it. The situation is a little different on Linux, where libdvbv5 takes care of a lot of this stuff.
I'll load it up with my signal generator though, and check if there is any easy way to get it finding the channel names.