If you get the "Sorry, the file cannot be displayed. There seems to be a technical issue ..." error when trying to view an image, a workaround is to click on the cog icon in the upper right side of the media viewer, and then select "Disable Media Viewer". We are aware of the problem and are looking for a solution.


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The Tektronix 4006 is a high resolution graphics terminal. The following peripherals where available for it: 4631 hard copy unit and 4923 digital cartridge tape recorder.


Display area 7.5 wide x 5.6 in high (19.1 x 14.2 cm
Alphanumeric mode format 35 lines, 74 characters per line, 2590 characters full screen
Character set 63 characters
Character size 5 x 7 dot matrix
Vector draw time 3.6 ± .2 ms
Baud rate 75 to 4800 baud
Input power 110/240 VAC, 50 to 440 Hz, 105 Watts