Once setup in your kernel... then:

Get a channel list, dvb-utils has a make_atsc_chanconf.pl

This makes ~/.azap/channels.conf

And Record.

In One window:

azap -r KVIE

status 1f | signal bdb1 | snr f6df | ber 00000000 | unc 00000000 | FE_HAS_LOCK

In the other window:

dvbtraffic

Make sure all is working.