Satellite antenna elevation measuring instrument suitable for amateur ----- Angle Measuring Instrument

Author: Tao Guang Bing With the implementation of "Village", "School School" project, satellite TV and satellite data receiving station has been popular in the vast majority of rural areas. The key to the receiving technology is "the star" of the satellite parabolic antenna. Calibrate the three major angles, azimuth and polarization angles. Experienced technicians use professionalism to calibrate the three corners of the three major corners, but it is not easy for amateurs. To this end, the purchase and self-made "earthwork", exploiting the star method, the small success, is now introduced. Be 1. First adjust the polarization angle on the high frequency head to the horizontal direction, and the "Level" of the tile work can be used. Connect the high frequency head and receiver, energize, select a set of transponder frequency input receivers for "horizontal", and adjust the receiver as a star. 2, buy a "feng shuiometer" to see Feng Shui, that is, the compass to adjust the probably direction of the azimuth. 3, homemade "elevation measuring instrument", use pine wood to do a straight wooden strip for 1.3 meters, a width of 3 cm, nailed a piece of teaching in the middle of the wood strip, and the angleomeizer and the wooden strip Point coincide. The bottom edge of the magute is coincident with the wood strip, and the wire in the bottom of the angleon is fixed to the wire that can be rotated around the bottom, and the bottom of the wire bends a hook, and the hook is hooked with a thin line to hang a lead hammer (or heavy) . In this way, a simple gauge instrument is done. When the angle is measured, the wood strip is placed on the parabolic surface, and the lead hammer naturally drives the wire to rotate, so that the wire and the cotton wire are in a straight line, and vertical with the horizontal plane. At this time, the angle between the wire and the wood bar is an elevation angle and can be read from the angleon. Adjust the oblique struts on the antenna base to make the elevation enhancement meet the requirements. Figure: α is an elevation angle. This can be explained by junior geometric theorem: one side of one angle is vertical on both sides of the other angle, and the two corners are equal or complementary, and when the two angles are acute angle, the two corners are equal. It is convenient to fix the elevation angle, and the calibration azimuth is convenient. As long as the antenna is slowly rotated in the probably direction of the azimuth, pay attention to the signal quality strip on the TV screen, you can search for a settlement table when more than 35% length. 4. After the satellite antenna calibration, the "polarization angle" of the high-frequency head is adjusted as required, so that the level is required, and the level and vertical polarization method is taken. The above-mentioned homemade elevation measuring instrument, easy to apply, simple and practical, interested, may wish to try.