Prior to 1984, KOBI (channel 5) served as the primary ABC affiliate for southern Oregon, but Medford was only partially covered. Viewers could also receive KATU from Portland on cable. By this time, the Medford–Klamath Falls market was one of the few markets in the country without full network service. This was partly because the Federal Communications Commission (FCC) had reserved channel 8, the last VHF frequency in the area, for non-commercial use (currently occupied by PBS member KSYS). The Medford–Klamath Falls market is one of the largest in the country in land area, covering a large swath of southern Oregon and northern California. This area is very mountainous, and it is very difficult to get decent UHF reception in rugged terrain. This made potential station owners skeptical about signing on a potential third "Big Three" affiliate on one of the available UHF allocations.