| 摘要 |
An arrangement for displacing a marker on the picture screen of a display device, in which, to shift the marker rapidly as well as exactly, the marker is displaced by means of a rotary pulse generator, the direction of rotation determining the direction of displacement and the speed of rotation the speed of displacement. The output pulses of the rotary pulse generator are supplied to a progressive frequency transformer which generates more output pulses per input pulse the higher the frequency of the input pulses. |
