| 摘要 |
<p>PURPOSE:To improve the visibility of rader display by executing logarithmic distance scale display up to a previously set distance, and in the succeeding distance, executing an equal interval distance scale display. CONSTITUTION:A clock and a rader trigger are inputted to a counter 1. The counter 1 is reset up by the rader trigger and counted up by the successively inputted clock. The output of the counter 1 is applied to a ROM 2 and the contents of the ROM are read out. Distance scale sweeping data corresponding to sweeping having characteristics executing distance scale display expressing a near distance by a logarithmic scale and a far distance by an equal interval scale are previously stored in each X-axis deflection component and Y-axis deflection component as the contents of the ROM 2 and respective data are supplied to D/A converters 3, 4. The D/A converters 3, 4 D/A convert respective inputs and supply the converted results to sweeping amplifiers 5, 6. The D/A converters 3, 4 amplify respective inputs up to prescribed current level and send the amplified signals respectively to a CRT X-axis deflection coil and a CRT Y-axis deflection coil to display a required distance scale.</p> |
