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Purdue University Experimental Set |
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This set was built by the Electric Engineering department at Purdue University. It was made in 1932 for reception of 60 line mechanical transmissions from the University's station W9XG. The Purdue engineers were probably the first to add synchronizing pulses to their transmissions, short ones at the beginning of each line, and long ones at the start of each frame. These pulses were added to the video information at a signal level higher than the level of black (called "blacker than black"), and could be extracted by the electronic receiver. The 1932 Purdue set is among the first electronic TV receivers. In order to test how far TV pictures could be reliably received, the set was taken in a car all over the state of Indiana, and into adjacent states. A generator supplied power for the receiver. It was determined that good pictures could be seen up to about 250 miles away from the transmitter.
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