| 摘要 |
PURPOSE:To allow a single image screen enlarged display of distance divisions of the specified range and routine display of other range, by retarding a reading- out speed of a video memory synchronized with a PPI sweep. CONSTITUTION:A sweep signal from a PPI sweep generating unit 100 is applied to a memory controlling unit 112 also and from video memories 106, 108 switched alternatedly through the unit 112, a video signal is read out in synchronization with the PPI sweep and supplied to a CRT102. On the other hand, this reading-out speed is retarded by the controlling unit responding dynamically to the specified range input unit 113 and on a single image screen by the CRT 102 distance division enlarged display E of the specified range D and routine display C of other range are represented. |
