| 摘要 |
<p>PURPOSE:To eliminate operation for manual receiver gain reduction and facilitate operation and to guarantee the certainty of a landing guidance by composing the radar device of a variable attenuator which controls the gain of a received input signal from an antenna, a high-low attenuation quantity setting means which sets its attenuation quantity to a preset value, and an azimuth attenuation quantity setting means. CONSTITUTION:The high-low attenuation quantity setter 4, the azimuth attenua tion quantity setter 5, a data selector 6, and a DA converter 7 are parts regard ing this method directly. This device is put in operation by inputting a radar trigger, an angle signal, and a clock to a gate generator 41 and outputting an angle which is set previously surrounding a corner reflector for a landing point and a switching signal for a distance range. An attenuation quantity setter 42 is a digital switch for setting the gain of a reception system in a normal operations state and an attenuation quantity setter 43 sends its output by similar operation even to an azimuth display system which is a digital switch for reducing the gain of the reception switch so as to display the corner reflec tor; and a signal required for timing matching is selected and outputted to an attenuator 1 through a converter 7.</p> |
