Wikipedia
KFSM-TV is the CBS-affiliated television station for the Arkansas River Valley and Northwest Arkansas that is licensed to Fort Smith. It broadcasts a high definition digital signal on UHF channel 18 from a transmitter northwest of Winslow. The station is owned by the Tribune Broadcasting subsidiary of the Tribune Media Company, as part of a duopoly with the MyNetworkTV-affiliate KXNW (channel 34). The two stations share studio facilities located on North 13th Street in Downtown Fort Smith. KFSM also operates a secondary studio located on North Shiloh Drive in Fayetteville along US 71B.
The station also carries MyNetworkTV on a second digital subchannel. Originally, it was known on-air as My 5.2 and was the market's primary MyNetworkTV-affiliate. Though KXNW became the MyNetworkTV-affiliate after Local TV acquired it in 2011, KFSM still carries MyNetworkTV programming on subchannel 5.2 in simulcast with KXNW (with Antenna TV programming now exclusive to KFSM-DT3). KFSM-DT2 can also be seen on Cox digital channel 661.
As of spring 2016, the over-the-air digital signal for the KXNW-DT1 simulcast on KFSM-DT2 was upgraded the into 720p high definition; thus offering a high definition feed for MyNetworkTV for the first time in the Fort Smith/ Eureka Springs, Arkansas area (and the entire Arkansas River Valley and Northwest Arkansas area and Beyond), with the Antenna TV programming being segregated out into its very own devoted Sub-Channel (via KFSM-DT3 Channel 5.3); although, the originating KXNW-DT1 feed remains in 480i 4:3 standard-definition. Antenna programming moved over to KFSM-TV's third subchannel, with Tribune Broadcasting replacing the hours programmed by Antenna TV with traditional syndicated programming, resembling most of Tribune Broadcasting's other MyNetworkTV affiliates.