| 摘要 |
PURPOSE:To measure the azimuths of electronic azimuth lines for a radar and the distance between the electronic azimuth lines speedily through simple operation by displaying a circle showing a distance scale and electronic azimuth lines contacting it on a plane position display device. CONSTITUTION:An electronic azimuth line (EBL) or reception azimuth is applied from an EBL generator 21 through an EBL/PPI signal switch 11, a sweep amplifier 13 which is controlled by a variable scale (VRM) generator 31 and an offset voltage generator 33 generating an offset voltage for determining a display position where the EBL of a straight line contacting VRM leaves from the center of the plane position display device, a deflecting yoke 14, etc., to deflect the electron beam of a CRT15. A video signal, on the other hand, is supplied to the CRT15 through a video amplifier 41 controlled by the generator 31 to display a VRM301 as a circle, an EMB401 running in the center, and EBMs 402 and 403 contacting the circle on the CRT at the same time, thereby measuring the azimuth and distance speedily through the simple operation. |
