The two stations share studios on Northeast Sandy Boulevard in Portland; KUNP's transmitter is located east of Cove atop Mount Fanny, within eastern Oregon's Wallowa–Whitman National Forest.

To overcome this, its signal is relayed on a low-power translator station, KUNP-LD (channel 47), which serves the immediate Portland area from a transmitter on Willamette Stone Park Road (near Skyline Boulevard) in the Sylvan-Highlands section of Portland, along with cable and satellite coverage folded into KATU's retransmission consent agreements to cover the market, along with some outlying areas.

The station was founded on August 6, 1999, and formally signed on the air on December 3, 2001, as KBPD; it changed its call letters to KPOU on May 14, 2002.

On August 21, 2012, Fisher Communications signed an affiliation agreement with MundoFox, a Spanish-language competitor to Univision that was owned as a joint venture between Fox International Channels and Colombian broadcaster RCN TV, for KUNP and Seattle sister station KUNS-TV to be carried on both stations as digital subchannels starting in late September.

KUNP-LP, as a low-power station, continued to broadcast in analog until April 13, 2012, when it made its flash-cut to digital transmission on UHF channel 47 and changing its callsign suffix from "-LP" to "-LD".

KABH was owned by WatchTV, Inc., alongside its crosstown Portland HSN affiliate KORK-CA, but was operated by Sinclair under a local marketing agreement (LMA).