KCWX

The station first signed on the air on August 3, 2000 as KBEJ. Although nowadays, owners of most TV/radio stations ask for a specific set of calls, the call sign was sequentially assigned within the May 1998 FCC callsign change report.[2] It originally operated as the UPN affiliate for two markets,San Antonio and Austin–a rarity by modern standards. Prior to the station's sign-on, UPN programming had been available in the San Antonio market on KRRT (channel 35, now KMYS) from the network's launch in January 1995 until January 1998, when that station switched to The WB as a result of Sinclair Broadcast Group (which had operated the station at the time, and acquired channel 35 outright three years later)'s affiliation agreement with that network;[3] UPN then was carried during the overnight hours on NBC affiliate KMOL-TV (channel 4, now WOAI-TV). In Austin, the network had been available first on a regional network of low-power stations across Central Texas known as the "Hill Country Paramount Network" (HPN), and later on K13VC (channel 13).

Prior to the station's sign-on, Corridor Television entered into a local marketing agreement (LMA) with Belo, then-owners of CBS affiliate KENS (channel 5). KBEJ originally maintained a separate feed for Austin cable providers. Under the LMA with Belo, KBEJ's signal always originated from the company's headquarters in Dallas, but some of its programming was provided by KENS and content decisions were controlled from that station's studios in the city's Mockingbird Hill district. Austin ABC affiliate KVUE (channel 24) provided the microwave link for channel 2's Stonewall transmitter and to Time Warner Cable's Austin system. The station's syndicated programming at the time during the dual-market focus usually consisted of lower-tier and older programs, in order to avoid syndication exclusivity blackouts in either market; after the station began to exclusively target San Antonio, its syndicated inventory has continued to incorporate lower-profile programming somewhat, while the entire overnight schedule has been leased to paid programming distributors to run infomercials. The KENS and KVUE master controls, located in their respective cities, were completely independent from the Dallas campus and KBEJ.

KCWX logo as CW affiliate, used from September 18, 2006 to September 1, 2010.

On January 24, 2006, the Warner Bros. unit of Time Warner and CBS Corporation announced that the two companies would shut down The WB and UPN and combine the networks' respective programming to create a new "fifth" network called The CW.[4][5] On March 28, Corridor Television signed an agreement to make KBEJ San Antonio's CW affiliate.[6][7] While the station was also expected to serve as the new network's Austin affiliate, on April 18, it was announced that the market's WB affiliate KNVA (channel 54) would also be joining The CW.[8] On April 7, 2006, the station changed its call letters to KCWX, in order to reflect its new affiliation.[9][10]

Soon after The CW launched on September 18, 2006, Time Warner Cable began blacking out CW programming on KCWX in the Austin market, as KNVA owner LIN TV Corporation claimed syndication exclusivity for KNVA on October 2. Time Warner continued to carry KCWX's non-network programming until April 3, 2007, when Time Warner Cable officially dropped KCWX from its Austin channel lineup.

During its four-year run as a CW affiliate, KCWX aired the network's children's programming blocks, Kids' WB, and later The CW4Kids, in pattern. However, when the affiliation moved to KMYS in September 2010, the block then called Toonzai (later replaced by Vortexx) was carried by that station over two days, running in a lower profile slot during the early morning hours on Sundays and Mondays, when the block's target audience of children between the ages of 8 and 12 years is usually asleep.

In Sinclair Broadcast Group's annual report for 2009 that was released in March 2010, the company disclosed that it had signed an affiliation agreement to move the CW affiliation to its San Antonio MyNetworkTV affiliate KMYS on September 1, 2010.[11] The affiliation switch was eventually moved up two days to August 30; on that date, the MyNetworkTV affiliation moved to KCWX.[12] With the then-pending loss of its CW affiliation, Belo terminated its LMA with Corridor Television on April 24, 2010, forcing Corridor to operate KCWX on its own.

KCWX's run as a CW affiliate ended on August 28, 2010, with the conclusion of the network's Friday prime time programming (which the station had delayed to Saturday night to accommodate a Major League Baseball game). By that time, The CW had discontinued its Sunday prime time programming. As a result, KCWX's last official day of its CW affiliation—August 29, 2010—featured mostly time-shifted programming from This TV. With the affiliation switch, WWE SmackDown briefly returned to KCWX for the first time since 2008 when The CW dropped the program; it moved to the Syfy cable channel one month later.

The station's digital signal is multiplexed:

Shortly after KCWX signed on its digital signal, the station launched a second digital subchannel that would serve as the San Antonio affiliate of This TV.

Because it was granted an original construction permit after the Federal Communications Commission finalized the DTV allotment plan on April 21, 1997 , the station did not receive a companion channel for a digital television station. Instead, on June 12, 2009, which was the end of the digital television conversion period for full-service stations, KCWX was required to turn off its analog signal and turn on its digital signal. The station flash-cut its digital signal into operation on VHF channel 5; as it chose that allocation as its final digital channel selection,[16] it had to wait for CBS affiliate KENS to shut down its analog signal before KCWX could bring its digital signal online, using PSIP to display the station's virtual channel as its former VHF analog channel 2.

In late May 2009, in a filing with the FCC,[17] Belo/Corridor stated that it would not have KCWX's digital signal ready to sign-on on June 12, instead expecting it to be ready on July 10 due to weather delays. Cable subscribers continued to view the station via a direct fiber connection of KCWX from KENS to the Time Warner Cable headend. Corridor/Belo was able to negotiate with the tower installer to finish the construction of the tower earlier than expected; KCWX's digital signal finally signed on the air on July 1, 2009. The signal reaches south of San Antonio and southeast to Nixon, north to Lampasas and west to Junction.

Since KCWX operates on a low-band VHF channel, an application has been filed with the FCC to increase the station's effective radiated power from 23.7 kW to 82.9 kW as well as an application to launch a fill-in digital translator that would broadcast on VHF channel 8 in the immediate part of San Antonio.[18] KCWX also re-broadcasts on a digital translator in Austin on VHF channel 8.[19][20]