KZSD-LP, UHF analog channel 39, is an Azteca-affiliated television station located in San Diego, United States. The station is owned by the E.W. Scripps Company, and is a sister station to ABC affiliate KGTV (channel 10). The two stations share studio facilities located on Air Way in the Riverview-Webster section of San Diego; KZSD-LP maintains transmitter facilities located in the San Miguel Mountains in southwestern San Diego County.
Because KZSD does not operate a digital signal of its own and the low-powered broadcasting radius does not reach the entire San Diego–Tijuana market, the station is simulcast over KGTV's second digital subchannel in order to reach the entire market. This signal can be seen on VHF channel 10.4 (or virtual channel 10.15 via PSIP) from a transmitter on Mount Soledad in La Jolla; the unusual numbering for the mapped subchannel is in order to align it with KZSD's cable placement on Cox Communications channel 15 (PBS member station KPBS-TV, which broadcasts on UHF channel 15 over-the-air, is instead carried on cable channel 11).
The station was initially granted a license by the Federal Communications Commission on September 25, 1997 (KZSD-LP's actual sign-on date is currently unknown). San Diego is one of four markets to receive programming from both the U.S.-based Azteca network and Mexico-based TV Azteca channels that preceded the American network's launch (Del Rio, El Paso and Laredo, Texas are the others). Much of KZSD's Azteca programming can also be seen on TV Azteca-owned XHTIT-TDT (channel 7) or XHJK-TDT (channel 13), sometimes simultaneously with the U.S. network's broadcasts.
On October 3, 2011, McGraw-Hill announced that it would sell KZSD, along with its other television stations, to the E. W. Scripps Company as part of its exit from broadcasting. The deal was completed on December 30, 2011.