| 摘要 |
PURPOSE:To attain ease of the setting of the direction of antenna directivity and the maintenance by displaying an azimuth angle and an elevation angle of an antenna with a spherical level. CONSTITUTION:A base 15 of the antenna is installed so as to obtain the azimuth angle in a designated reference direction while observing a compass 26. The antenna 10 is fixed while adjusting it so as to obtain a desired elevation angle by observing an elevation angle indicating scale 23 and an air bubble 21 of an indicator 18 after loosening a screw 14. A fixed screw 25 is loosen and fixed after a desired azimuth angle is obtained by using an azimuth angle indicating scale 24 and the air bubble 21 of the indicator 18. Since the elevation angle is shifted from the desired value in adjusting the zaimuth angle if a support 13 is not perpendicular, said adjustment is repeated for the correction. The adjustment in installing the antenna is made easy and the confirmation of the shift of angle due to external cause is attained easily. |
