A USER'S GUIDE TO HDTV
         (High Definition Television Interference Scenario Model)

                            1  Introduction   

The HDTV program allows the user to create scenarios of interference
generated by any mix of NTSC and DTV stations in a given area.  The program
maintains a catalog of DTV and NTSC stations based upon existing entries in
the FCC TV database as well as a catalog for each user of the program.  The
user selects the desired and undesired stations from these catalogs to create
a scenario. Scenario options include;
            1 - Examine a single station coverage. Coverages for
                each station include;
                 a. Longley Rice 50/50
                 b. Longley Rice 50/90
                 c. Longley Rice 50/10
                 d. FCC Curves 50/50
                 e. FCC Curves 50/90
            2 - Examine the interference generated by a set of
                undesired stations upon the coverage of a single
                or list of desired station(s).
            3 - Create a composite plot of a set of stations or
                a region such as an entire state or set of states.

The user can examine the catalog of NTSC and DTV stations generated from the
existing FCC allotment table and existing FCC TV database but cannot modify
any of these stations.  The user can examine, add or delete stations from his
user catalog. The user can browse catalogs by state, call sign, city or
channel and can sort the list by these options.  The user can display the
data for a station that was used in creating that stations coverages listed
above.