When watching television via antenna you typically connect the equipment to a TV set. However, it is still possible to view the video from the antenna on an LCD monitor, you just need additional equipment to perform the hook-up. This is helpful if you have an extra monitor lying around the house and don't want to purchase a TV. Because there is no actual tuner installed you must use a digital to analog converter box to receive the broadcast signals.
Connect the coaxial cable running from the antenna into the "In" port on the digital to analog converter box.
Plug the RCA video end of the RCA to VGA cable into the "Video Out" port on the converter box.
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Attach the VGA end of the cable into the "VGA" port on the LCD monitor.
Power on the monitor and the converter box. The LCD screen is now able to produce the video signals from the television antenna.