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In April of 1931 von Ardenne had made a flying spot film scanner. It produced a 60 line picture, using a horizontal scan rate of 1500 Hz. and a vertical scan rate of 25 Hz. An 8000 volt power supply was used on the CRT. Here is the receiver used in the system.
A block diagram. Notice that the scanner is connected directly to the monitor CRT. The signal was not broadcast.
Here is a block diagram of a scanner with sync pulses added to the video, for possible broadcast. |
