Sony KDL-40BX421 Operating Instructions - Page 9
Connecting the TV, Cable System or VHF/UHF Antenna System - no picture on my tv
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Getting Started Connecting the TV Cable System or VHF/UHF Antenna System You can enjoy high-definition and standard-definition digital programming (if available in your area) along with standard-definition analog programming. This TV is capable of receiving unscrambled digital programming for both cable (QAM and 8VSB) and external VHF/UHF antenna (ATSC). Cable or VHF/UHF (or VHF only) 75-ohm coaxial cable Rear of TV CABLE/ANTENNA • It is strongly recommended that you connect the CABLE/ANTENNA input using a 75-ohm coaxial cable to receive optimum picture quality. A 300-ohm twin lead cable can easily be affected by radio frequency interference, resulting in signal degradation. Cable System and VHF/UHF Antenna System Use an optional A-B RF switch (not supplied) to switch between the cable and over-the-air antenna programming, as indicated below. Cable Antenna A/B RF Switch A B Rear of TV CABLE/ANTENNA • Be sure to set the Signal Type setting to Cable or Antenna found under the Channel settings for your input signal (page 35). 9