When we are almost in the street, the picture begins to flicker. The TV set is now about 120 feet from the wireless base station that has been transmitting high-definition television signals wirelessly from a PC the whole time.

"At the San Mateo Marriott, we borrowed the maid's cart and went down the hall with it. We went 200 feet, through six rooms and three external walls" before the signal got a little weak and caused the picture to get pixilated, he said. "Often, people want me to unplug the TV to make sure it isn't power line networking."

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