A system description showing the benefits of this rotor.
The azimuth and elevation rotor system consists of an external antenna rotor EPR 203 and the indoor control unit EPS103. There are no additional parts needed between the mast mount and the dish.
The external rotor directs the parabolic dish fully automatically and microprocessor-controlled to one of the 345 pre-programmed satellite orbit positions. For this purpose two separate (!) 24 V motors are installed in a weather-proof cast aluminum housing of the external rotor assembly. They actuate the parabolic antenna in the desired direction horizontally in the azimuth and vertically in the elevation direction via reduction gears with high precision and less than 0.2° repetition accuracy.
Due to two absolutely independently working drive motors, there is from now on no need for any polarmount alignment any more, no time consuming calibration of declination and elevation, north-south axis a.s.o. The problems of many popular polar mounts to accurately approach the extreme west or east are things of the past. Any alignment can be made out of the living rooms armchair!
The aforementioned azimuth/elevation rotor system turns the parabolic dish antenna throughout a 180° azimuth range, which is wider than the theoretical and practical line of sight to the satellite orbit. The elevation range of the system is 40°. It remains to the user, where he uses this elevation range. In Europe you will mostly use the elevation span from 0 to 40°, near the equator this will be from 50 to 90°. Because the system carries out all operations with utmost silence contrary to some noisy actuator motors, it can be used at night without waking up neighbours, as it could be assumed from such a high-quality system.
The only adjustment of the external rotator unit is the approximate directional north alignment of the aluminum housing. "Approximate" means that all corrections are performed by a microprocessor inside the indoor control unit. This takes us to the technical details of the operating and control unit. It serves as a simultaneous control and computer center and can thus be described as the heart of the system. The heart itself is a fast 16-bit microcomputer and offers technicians among the users a real eldorado of programming opportunities. Just when mounting it, the system recognizes incorrect or missing wiring. E. g. the control panel includes electronic blocking- and overload-protection, spin-watch and additional non-coded text information.
Let us emphasize those points which are of prime interest to the system operator and user. There is the memory for example. Its latest version has stored all actual satellite orbit locations with all data and names. For instance there is the memory, the latest version incorporates 345 pre-programmed geostationary satellites (all around the globe!) with names and all further data, as well as the opportunity of self-programming 400 satellite positions.
To realize an easy and trouble-free reception from the satellite data stored in the computer memory, only one additional data entry is required and this data is the last unknown the computer cannot know: The geographic coordinates of the antenna location! After entering these data in the processor by means of keypad and operating instructions, it will calculate all required azimuth and elevation angles between the antenna location and the satellite locations within the geostationary orbit.
After this calculation you have to choose any good receivable satellite and tune your sat-receiver to the corresponding channel. Then you will see, mostly, "nothing" on your TV-set. Due to mechanical errors the antenna "looks" more or less aside the satellite. For such a rotor this is no problem: start "Super Search" by pushing a button. Now the rotor starts to turn around in concentric/helical and increasing circles to look around in the sky, beginning from the calculated AZ- and EL-angles. You can start or stop this procedure by pushing the button. Did you find "the right one", you may start the autofocussing or try to find out the best reception settings by pushing the buttons UP/DOWN/EAST/WEST. All out of your armchair.
This correction causes the control panel to re-calculate the positions of other pre-programmed satellites. Immediately you can switch over to any other wanted satellite and the rotor will find it with good reception quality. If you have connected the AGC field-strength signal to the control panel before and adjusted it, this function will focus the chosen satellite to an optimum that you can not afford by hand. If you like, you can freely optimize every satellite signal by hand or auto-focus and store it.
Installation is easy and simple. What about every day use? Via the front buttons you can switch to all satellites sequentially. Or take the number-pad for direct-access to the satellite-number. After that enjoy the remote-comfort of a polarmount-set with the perfect precision of the 2-axis rotor.
If one or another satellite cannot be adequately received due to a slanted position of the antenna mast as a result of improper concrete casting, the computer program allows to individually correct azimuth and elevation of all satellite locations! For this purpose four keys of the keypad which is concealed by a cover plate are available for UP/DOWN and EAST/WEST adjustment to align the parabolic antenna under all circumstances to those angles which provide optimum reception. Of course all of these new values can be stored in the memory, so the entries must be made only once.
But this is not the end of operating convenience, rather the beginning, e. g. entering a new satellite orbit location which is desired, but not yet stored in the memory. To do this, you select a sub program and the computer asks you which storage space you want to use. After selecting the desired space, you just enter the satellite location's degree of longitude in the orbit and perfect reception of this satellite is guaranteed. Because of its advances design, the computer is capable of performing calculations with persistent accuracy of all antenna locations, regardless if they are East or West of the Greenwich Zero Meridian. The computer can be used of course, to compile a table of angles for all pre-programmed satellite positions after entering the desired grid coordinates for large cities. Thus you can use your rotor computer for calculating the angles, under which the individual satellites can be received at each receiving station on the earth. But it does even more: It tells you, if the satellites are within the present range of vision or already hidden behind the horizon.
To minimize fuel consumption older satellites are "inclined" in higher amplitudes. More than 50 % of all satellites are already in "inclination orbit". And their percentage is growing steadily. Permanent reception with greater antennas is not possible all over the time. One big advantage of this rotor system is the tracking of such satellites: Even before the TV viewer will recognize any loss of picture quality, the antenna will follow the satellites position automatically, quickly and perfectly. This system is superior to all sat-receivers with integrated 2-axis-control too!
One of the most outstanding performance features of the system is its ability to cope with high wind speeds. Proved by finite elements calculation for material and shape of the load carrying parts. On the first look you recognize the high durability and stiffness of the aluminum die cast. But what's going on inside? Here some infos for the technicians, how the rotor is constructed: