Wikipedia
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).