Satellite antenna simple manual pole shaft seat, Satellite Antenna
Keywords: satellite antenna simple manual polar shaper production
Simple manual polar shaft
Using the manual pole axis antenna to achieve multi-star fast conversion and reception, it is undoubtedly a new way to explore the "Star Sky". It not only enables you to understand the principle of extreme axis antennas, but also feel the fun of hand debugging, but also make you appreciate more, more exciting TV programs, what is half-time, why not?
The so-called polar axis antenna is fixed to the LNB of the antenna, which is mounted on a rotating shaft, which is substantially parallel to the bottom of the earth, and is called a polar shaft due to the axis of the North and the north-north poles. .
When the polar axis was first applied to an astronomical telescope. When observed, the astronomical telescope was rotated from the opposite direction of the extreme axis to the opposite direction of the earth, and the position movement of the sky in the observatory due to the rotation of the earth was canceled. Be
The main axis of the ordinary satellite antenna is perpendicular to the ground, the structure is relatively simple, and three parameters of the azimuth, elevation and polarization angles are used when positioning antenna. When changing the star, these three parameters are also re-adjusted, it is very inconvenient. After the axis of the antenna is changed to the polar shaft, the antenna will automatically follow the polar axis rotation, the azimuth, elevation and polarization angles, and only one adjustment parameter, that is, the angle of the pole axis. It can be believed that the three parameters of the azimuth, elevation angle and polarization angle of ordinary antennas are due to the rotation of these antennas, and the additional parameters caused by the shaft are parallel to the ground axis. Once the rotation axis points to the correct, the additional parameters will disappear. NS.
One of the key factors for making the success of the polar axis antenna is to change the axis of rotation of the antenna to adjust the tilt shaft to adapt to the need to adjust to the Earth's self-turning parallel in different latitude regions. And the polar axis antenna produced, only needs to target the user, so, as long as the polar shaft is found, the rotating shaft of the satellite antenna is fixed in the polar axis direction. The key factor in the extreme axis antenna is in that the polar shaft drive, the control and positioning device, and the star friends can try to make a manual pole axis antenna, which does not drive, control and positioning means, as long as the rotating shaft is adjusted to the basically and the ground is parallel, Directly rotate the antenna directly, the champion is very fast, fast and convenient.
In order to avoid the cumbersome azimuth, the calculation and measurement of the elevation angle, the characteristic of this extreme shaft seat is fixed to the column of the top end as a slope shape, and as long as the ramp tilt angle on the column is adjusted, the polarization angle is adjusted carefully, and it is very successful. .
First, you should use a column-type satellite antenna because it is not easy to secure when the site satellite antenna is rotated. It must be used to select the genuine column satellite antenna, cut off the base of the column, play a diameter of 2CM small hole at the appropriate position below the column, then in the position of the small hole, weld a nut, requiring the inner diameter of the nut to be slightly smaller than the small hole One point, in the column, insert an iron pipe that is inserted, with a screw as a top wire, used to secure the iron tube in the column. At the head of the column, the soldering of two oblique iron, the oblique iron and the column is in the inner Mongolia area of the north latitude 42 ', about 120' angles with the column (the angle is too small, easy to cause the center of heart), It is triangular, causing the three-footed trend, so that the inclines are in the northern, the inclines and horizontal angles, which is approximately equal to the local latitude, which, the angle of rotation and the ground is 90 'minus the local latitude, rotation shaft and the north and south The two poles of the connecting (ground) are basically parallel.
At the bottom of the pot surface of the column satellite antenna, there is a tie rod that adjusts the angle of the pot. This tie rod is cut off from the middle, lengthening a steel bar, making the original column in the vertical plane, vertical The pot face is parallel to the original column. That is, the point to the LNB is vertical and the rotating axis. After fixing, the pot surface is fixed to the triangular bracket. When the bevel of the triangle is in the north, turn the pot face toward the south, adjust the length of the iron pipe in the original column, so that the LNB is in the Earth's synchronization satellite on the equator Track, when the LNB of the satellite antenna points to the oriental or Western, the point of LNB is in the horizontal direction. Next, you can take a closer look! After finding the satellite, turn the satellite antenna, then make fine, after all adjust, turn the bottom of the tripod to fix each other with the top 8 wire, press prison.
It can be said that the key to the success of this manual pointer is to find the direction of the polar axis. Once the adjustment is fixed, all other angles are not adjusted. The antenna will automatically adjust the elevation angle and polarization angle as your rotation.
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