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ProfiTracker XL
      CONTENTS:   capacities/functions | special technical features | system description | technical data | news     

For communication companies, broadcasting centres, meteorological stations, press- and multimedia editorial offices, research institutes and educational establishments, VSAT, SNG, radio relay transmissions.

When prospective customers learn about this new antenna positioner, they suppose a tuned, high scale copy of our longstanding product â€Profi Tracker CLâ€. This is only partly true. The new â€ProfiTracker XLâ€, however, can do more: Our objectives for the new design were

  1. to position absolutely exacter
  2. to remain precise and rigid within a wider range of wind speed
  3. to increase the guaranteed wind exposure-survivability
  4. a higher static load capacity
  5. to integrate all features and capacities in one single model
We largely succeeded in combining our ambitions in this product.

A system, which consists of an extern and intern unit:
Photo 193 Photo 194




What do the capacities of the new product look like?

  • Exceptionally easy and fast installation, and yet a highly accurate alignment due to the utilization of one motor each for the angle of altitude (elevation) and for the horizontal rotation (azimuth), combined with a high speed positioning computer
  • Full equipment: The system includes an external unit (rotor) and an internal unit (operating panel with power supply)
  • Safe for antennas up to 3.7 m in diameter
  • Given this maximum size, the antenna still allows for 180 km/h wind speed!
  • Stylish appearance due to distinctive industrial design
  • High degree of operating convenience achieved by pre-programming all geostationary satellites currently existing â€around the globeâ€! Thus the rotor system is †subject to the physical limits - instantaneously applicable on all continents, no matter whether you are south or north of the equator!
  • Name and position of each pre-programmed satellite are displayed.
  • Safe for the future, with 400 SAT-memory places, which can be individually changed, re-allocated or deleted by the operator.
  • It can be predetermined for each satellite, whether, once the satellite has been dialled-up, one â€Autofocusâ€-run is to be performed automatically or, e.g. at inclining satellites, a permanent â€auto-tracking†runs or only one single positioning is done.
  • Best information and feed-back during programming and everyday-operation via a well-lit 40 digits-plain-text-display.
  • All programming and adjustment operations can be remote-controlled from the location of the receiver and the control unit!
  • Sophisticated electronics allow for best and most accurate adjustment to any existing system (see advanced programme list).
  • All data and settings are secured for years against electrical power outage by a long-life backup battery
  • Important data and settings are password-protected
  • Besides AUTO-FOCUS and AUTO-TRACKING there is SUPER-SEARCH making life much easier
  • Particularly suitable when using several LNBs, (C-, Ku-, S-Band und Yagi-antennas) having each its own feed. The optimal focal point of each Feed for both axes can be memorized individually!
  • With hardware-extension, clock inclusive of calendar and astronomical sun-tracking-program to prevent the risk of LNB-burnout or LNB-melting, when the formation "sun-satellite-parabolic-antenna in one line" appears. This system permanently compares the current position of the sun to the AZ- and EL-angles of the target- satellite. If there is any danger the LNB could be destroyed by direct centric sun-radiation, the system raises an alarm. The user can determine by pre-programming, how many minutes before the event a notification should be delivered, whether the position will be automatically quit for a short period after a set time, or whether the transmission shall not be interrupted and the position be kept continuously.
  • The wind-sensor-interface is provided to connect a pulse-giving wind-anemometer to the 4-wire-interface. After having entered â€pulse per time unit†of the wind-sensor and after reaching the wind-speed-threshold preset by the user, the system automatically turns to a preset, more streamlined position. The delay time in this position in this position is programmable as well.
  • Fully automatic operation, due to automatic start-up in case of power failure
  • Typical range of application: Communication companies, broadcasting centres, meteorological stations, press- and multimedia editorial offices, research institutes and educational establishments, offshore oil rigs, VSAT, SNG, radio relay transmissions and many others.

Photo 206 This photo shows the ProfiTracker XL
with a 3.10 m antenna(L-band) used
by EADS Astrium, one of the installers
of the Europe owned Satellite Navigation
System "GALILEO".
Photo 211 Here the XL-positioner carrying a 3.1 m
microwave antenna, on a lattice tower
in 150 m height (Belgium).

The system can be deployed for geostationary, also inclining*** geostationary satellites, as well as for orbiting ones (LEOs). Features are:

  • 90° elevation span
  • 360° azimuth-rotation angle
  • 19â€-rack-type control unit
  • 400 programme places, 340 of which are already preset with current satellites
  • solid state relay
    • for material-saving permanent-focussing/-tracking
    • no contact-burnout, due to mechanical contactless switching
    • less noise due to absence of switching or cut-off sparks
    • silent control unit, because no parts are moving
    • cultivated two-speed-operation, because semi-conductors can be switched on and off in high-frequency
    • more accurate, because static switches enable the user to drive different speeds
    • improved tracking behaviour, because the positions can be targeted more precisely by â€starting†and â€stopping†at reduced speed
  • â€True†soft start and soft-stop is achieved by using the integrated â€SERVOâ€-function
  • With time-consuming logic: in some positioning phases both of the motors are running simultaneously!
  • With Receiver-interface* (image G) for connection and remote control via receiver/ sat-tuner with motor-controlled approach, adjustable transfer speed (1 to 99 pulses/sec), via 4 wires only (motor 5 to 60 V, pulse = 50 V, 100 mA max.)
  • Simultaneous signal transmission, while both motors are active!
  • With analogue input (AGC)
    • For field-strength dependant positioning-optimisation** – the working range of the AGC-signal supports adaptation to the receiver as well in amplitude/slope as in zero-point value (max. 12 V – signal-Î min. 0.1 V pos. & neg.)
    • To optimize performance for stable sat-positions
    • For geostationary, but locally inclining satellites

The searching- and tracking-behaviour (AUTO-FOCUS/- TRACKING) can be influenced in a motor-protecting way by selecting the max permissible deviation, by setting the time of the next searching cycle, by determining the searching amplitudes as well as the searching algorithm. Field strength data are taken from the AGC-output of the receiver/ Sat-tuner/ modem (but also from other linear systems), so that C-, S- and Ku-band-systems can be used. The measured analogue signals are converted into one 8-bit Word (0 – 255). The read-in clock rate/- resolution is 250 Hz! The relative field strength is permanently displayed on the control unit. A long time before one gets aware of any degradation of quality, the optimization of the field strength is performed automatically, fast and with high precision. (The AGC-connecting cable to the receiver is included in delivery.)

Of course you can search a satellite manually with such a system in a perfect way: Looking at the display, watching the AZ- and EL-angle – right/left – up/down. You may think â€Nothing can be easierâ€. – You are wrong! It gets even more perfect – with â€SUPERSEARCHâ€: During installation, you now dial up a satellite as usual. Due to mechanical mounting errors, you will – more or less – miss the satellite. Now SUPER-SEARCH flashes into action. Starting from the calculated AZ- and EL-angles, the rotor will now concentrically scan the sky by widening circles, always in line with the apex angle of your antenna. In this process you may possibly find satellites which have not been selected. Therefore this key enables the searching movements to be stopped and to be restarted. As soon as the right satellite is recognized, you may start the auto-focussing or optimize manually.

The controller respectively the system offer receiver pulse synchronization, motor sensor monitoring, motor emergency operation, focussing via RS 232-interface, park-position, direct angle selection and more (for more details, see table â€Enhanced Programme-Functionsâ€).

*  =  Receiver-Interface: The 4 wires, normally routed from the sat-receiver to the linear actuator motor on the roof, are connected to the terminals at the rear panel of our control unit. Afterwards, the satellites can be selected arbitrarily, individually and directly using the remote-control of the sat-receiver – as with an actuator, yet much more accurately and from â€horizon to horizonâ€, even at the ends of the â€Clark Beltâ€!
**  =  The autofocus-operation requires a very rigid mechanical connection between the antenna and the rotor. It must be possible to correlate any signal measured by the satellite receiver exactly with a specific antenna direction (thus direction of the rotor). AGC-signals shall only indicate true field-strength dependant changes, without time-shift, without image content fluctuations, and they must be free of â€spikeâ€-influences.
***  =  To save fuel, older satellites areâ€inclined†in higher amplitudes: More than 50 % of all satellites are already in the â€inclination-orbitâ€. And their number will be growing! Therefore a non-stop reception is not always possible with bigger antennas. One of the major capacities of this rotor-system is the â€tracking†of such satellites: Even before the TV-spectators get aware of any degradation of the image quality, the antenna will follow the satellites†position automatically, fast and perfectly!

b.  SPECIAL TECHNICAL FEATURES back to the beginning


Photo 13


For communication with an external computer, the system is supplied with a serial two-way «RS 232 C data-interface» (data stream: 8 bit / no parity/ 1 stop-bit / 50 to 9900 baud with hardware-handshake). Can be used to advantage for: Alignment to and tracking of nonâ€geostationary objects, such as stars (astronomy), space stations (ISS), amateur radio- satellites (OSCAR) and for low-flying LEO-satellites, respectively those with elliptical orbits.
Direction-defining data are transmitted to the rotor-control via a «RS 232 C data-interface». This works in the opposite direction, too: You may at any time recall information about the rotorâ€s operating status from the computer. The intelligent interface also allows for operation via telephone-modem. Built-in filters make it possible to operate several rotors at a single interface.
Also suitable for field-strength depending alignment to and tracking of measuring signals, e. g. meteorological probes (weather balloons), radio direction finding of locating movable transmitters. The measuring directions and the field strengths are permanently transmitted to the external computer via data-interface!


  • Rotate azimuth motor to 134.56°   –   "AZ = 134.56 [CR]"   or
  • enter elevation-position into the computer   –   "EL = ? [CR]"
  • The instruction word â€FOCUS†triggers an automatic focussing-run.
  • The instruction â€RESULT†arranges for an automatic read-out of operational and performance data after each auto-focussing, e. g. AZ- and EL-angle with the belonging strength of the analogue signal. The automatic read-out can transferred to a computer (as a protocol, for instance), but also directly on a printer! These data can be stored in a file on a computerâ€s hard drive and they are immediately available to be used with commercially available spreadsheet programmes or databases, therefore they can be displayed graphically without a special programme.
    This data string additionally contains date and time. See a sample of this data string here:
    Row-No.; day; date; time of day; tracking-channel; AZ-angle; EL-angle; AZ-motor-pulse; EL-motor-pulse; level of the analogue channel 1; 2; 4 formatted as follows:
    00000 Mon 11.12.98 15:23:44 01 00000 00000 00000 00000 00000 00000 00000
    There are more instructions available!
This interface is needed
  • for PC-communication or
  • for a GPS-receiver or
  • for the integrated or extern web-server

Only one function can be used at the same time.


This function is used for automatic takeover of the global latitudes and longitudes (coordinates) from a GPS-navigator /receiver via the serial interface to the arithmetic and logic unit of the computer. In this case it is not necessary to manually enter the location of the system.

The NMEA183-protocol can be read and used.

An appropriate GPS-receiver can be found at 'COMPLETIONS'




For the activation of a commercial polarizer (dipole- or wave-guide-polarizer) with pulse-width control. This extension can be used to save the individually adjustable polarizer position for each single satellite position. When selecting the same satellite later on, the corresponding polarizer angle will be approached automatically.
Connection: Plus, ground and pulse-width




Integrated web-server, making EGIS-antenna-positioners controllable by means of a computer network. A choice of satellite- (A) or terrestrial- resp. waveguide positions (B) will be made available to all clients for selection and approach via Internet or Intranet. Programs, memory, logs and anything 'soft' are stored undetachably on flash memory. Any Internet browser (i. e. MS Internet Explorer, Mozilla, Apple Safari and so on) can be used platform-independant to select and approach satellites as well as positions from the net. Of course a simple hierarchy of programmable authorisations is already implemented, which will control the number of users selectively. The use becomes transparent by a log working automatically in the background.

Caution: The control devices (Profi Tracker) requires a RS232 interface (option: pos. b1 !)

An entire satellite, a specific transponder or a defined frequency can be selected via the integrated spectrum-analyzer in order to generate the AGC-signal.

Details in pdf-format:

    A. Satellite version
    B. Terrestrial resp. microwave version


The user of the system can change the azimuth rotation range to the »360° endless»- mode. This alteration also activates a revolution counter with programmable limiting of revolutions (to avoid cable rupture). In each direction of rotation, this limitation is adjustable between 1 and 99 revolutions.


Control centres and technical control stations in studios, antenna head-end stations, telecommunication and satellite communication offices often require operation and control via 19â€-rack-mount equipment. Therefore the control of the system has been integrated into a 19â€-rack housing with 3 U x 290 mm, front-panel anodised in aluminium colour. Besides an increased HF-density, the device provides plug-in connections and an illuminated two line display, as well as a front safety lock (2 keys) to lock certain operating functions, which protects the system against unauthorized use.
LEDs are displaying driving directions and other operating states.



Photo 174


This device provides an AGC analogue signal for a manual and automatic field strength-related alignment of antennas. It was designed for the â€locating†as well as for the â€tracking†of satellites, but also of other â€mobile†HF-signals.

With the integrated spectrum-analyser, you can selectively use the whole satellite, a certain transponder or a special frequency to produce the AGC-signal.

more details in PDF format



(Hardware- and firmware-modification)

The GPS extension for the antenna-positioner provides local position detection and subsequent angle calculation of all geostationary satellites which are visible from this position.
Receiver and GPS-antenna are integrated into a common housing and mounted to the back of the controller. If necessary, the GPS satellite signals can be transferred to the control system also externally via an included cable of 5 m in length.
The automatic read-in process of the lat/lon-data has to be actuated manually.
The power supply for the GPS extension is taken from the controlling device.


Photo 152


An anemometer is used to measure the locally appearing wind speeds. The 4-wire-interface on the control unit is able to read and to evaluate the signals from the anemometer.


  • Three- cup system
  • Ring of cups - outer diameter: 120 mm
  • Diameter of the cups: 40 mm
  • Installation height: 70 mm
  • Material: ABS
  • Pulse generator system: magnet/ reed-switch
  • Pulse-rate: 60 km/h = 16.8 m/sec = 47 Hz
  • Suitable to be mounted on a mast or on top of it

Please note: The 4-wire-interface can either be used to connect satellite receivers or to connect wind sensors.


Photo 168

4. PC-Software for 'GEOs' 'SatPicker I'

A PC-software-programme available on CD in English language to dial up geostationary satellites via RS 232-C interface and an EGIS-antenna-positioner.
All current â€GEOs†are preinstalled within the programme. To improve clarity, satellites can be chosen – by clicking – from the complete list, be inserted in a list of preferred satellites and be saved there afterwards. Another clicking †and the desired satellite is defined. A bi-axial fine adjustment is also possible. These data are also non-volatile saved in the PC. The â€Clark belt†will be visualized within a desk window and the position of the current satellite will be displayed in a graphical format.
The programme is particularly suitable for journalists, correspondents and editing offices in publishing houses, broadcasting centres and translation agencies, but also for educational establishments and public authorities. Detailed operating instructions included.

Click here to see a screenshot of the programme.

System requirements: PC with hard drive with a minimum of 5 MB free storage place minimum, Windows 95/98/Me/NT/2000/XP/Vista/7, CD-drive, mouse and serial interface


Photo 169

5. PC-Software for 'LEOs' 'SatPCI'

A PC-software-programme, available on CD with detailed description (in German and English language). To dial up predominantly orbiting satellites and approach/ operation of the rotor via RS 232 C-interface. The programme provides Kepler-data for about 300 satellites – â€Geos†as well as â€Leos†– and space stations (e. g. ISS). Current data can be loaded in NASA format. Lots of graphics & info like orbit data, orbit curves, calculated shadings, viewing angles and others more.

System requirements: PC with harddisk with a minimum of 5O MB free storage space, Windows 95/98/Me/NT/2000/XP/Vista/7, CD-drive, mouse and serial interface

c.  SYSTEM DESCRIPTION back to the beginning

A system description, outlining the vast scope of this rotor.

The azimuth-elevation-antenna-positioning-system consists of the external rotor unit EPR-XL and the internal operating unit EPS-XL.

The external unit can be placed directly onto the mast and be mounted there, - no additional parts are needed.

The microprocessor-driven external rotor unit fully automatically directs the parabolic- or Yagi-antenna to the about 350 pre-programmed satellite-orbit-positions. For this purpose, two separate 24-volt-motors have been integrated into the external rotor unit, provided with a weatherproof steel housing. Via their corresponding gears, the motors manoeuvre the parabolic antenna with high precision and a repetition accuracy of 0.1 Â° into the desired directions, i. e., into the azimuth- as well as into the elevation direction.
Due to the completely separately working drive motors, a polar mount adjustment is not required anymore and the same is true for the so far necessary, most accurate and thus very time-consuming adjustment work of declination, elevation, north-south axis etc. Also the problems of some polar mounts to approach the extreme eastern and western positions are now a thing of the past. Any alignment can now be done from the comfort of your home!

The aforementioned Azimuth-elevation rotation system rotates the antennas in an azimuth range of 360 Â°, which is bigger than the practical and theoretical visual range to the orbit of the geostationary satellites. Concerning elevation, the system manages to open an elevation window of 90 Â°. That the system is exceedingly quiet in performing all this, goes without saying for such a sophisticated system.

Two settings are required for the external rotor unit during assembly/ installation:

  • The approximate north-south-orientation of the housing – approximate, because all possibly necessary corrections can be carried out at the internal operator unit
  • The Azimuth-axis has to be aligned to the geocentre by means of a spirit-level.

This takes us to the technical details of the operating and control unit: This equipment serves as control and data processing centre, thus it represents the heart of the system. The heart itself consists of a fast 16 bit micro controler and enables the technician amongst the users to find a true eldorado of programming opportunities. Already the assembly fitter will be informed about any incorrect mounted or missing connections. The control includes e. g. an electronic blocking and overload protection, spin watch and additional non-coded text information.
Finally, we have to deal with points, which are of foremost interest for every system operator or user of the system. There is the memory, for example. Its most recent version contains 350 pre-programmed geostationary satellites (all important ones around the globe!) with names and further data as well as the possibility of self-programming up to 400 satellites.
In order to realise a comfortable and smooth reception with the satellite data stored in the computer memory, only one single data entry in the computer is required, and this data is the last unknown quantity the computer cannot know: The geographic grid coordinates of the antenna location! After entering these values into the processor by means of the keypad, it will calculate all required azimuth and elevation angles between the antenna location and the satellite positions within the geostationary orbit within the shortest delay.
After this calculation select any desired, good receivable satellite and match your receiver / sat receiver / modem to a corresponding programme place and – probably – will see nothing on your tv set. Due to mechanical mounting errors, you will â€look†– more or less – aside the satellite. But this represents no problem for this rotor: Start â€SUPER-SEARCH†by pushing a key. Starting from the calculated AZ- and EL-angles, the rotor will now concentrically/helically scan the sky by widening circles. You can stop or restart this procedure by pushing a key. As soon as the â€right†satellite is recognized, you may start the auto-focussing or, by using the keys UP/DOWN/EAST/WEST, â€drive†to optimum-reception. All this can be a achieved sitting in an armchair!

This correction causes the control unit to re-calculate the positions of all other satellites, using the now precisely captured satellite and the antenna-position already entered beforehand! Immediately afterwards you will be able to select any other satellite and the rotor will find it in good reception quality. If you have communicated the field-strength signal AGC from your radio / modem / sat receiver to the rotor control unit before and aligned it, this function will focus the selected satellite via both axes in a quality that you cannot achieve manually! Manually or via auto-focus, if necessary, you can correct and store all of them together or each of them individually.

The installation is comfortable and easy. But what about everyday operational requirements? Using the keys on the front panel of the control unit, the satellites can be selected sequentially. Or, for direct access of the satellite, one enters the satellite number into the keypad. More comfortable yet is the selection via remote control of your sat-receiver: The four wires normally leading from your receiver to the linear motor (actuator) of your antenna on the roof have to be connected with the rotor control unit. Now just programme it as usual. After that enjoy the remote-comfort of a polar mount set with the perfect precision of the two axis rotor.

The operating convenience does not end here   for you, it has just started! There is for example the entry of a new desired satellite orbit location, not yet stored in the memory. To do this, you select a sub-program and the computer asks you, which memory location you want to use. After selecting the desired memory location, you just enter the satellite locationâ€s degree of longitude in the orbit and perfect reception of this satellite is guaranteed as well. Due to its advanced design, the computer is able to perform calculation of persistent accuracy of all antenna locations, regardless whether they are East or West of the Greenwich Zero Meridian or of the equator. 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 save fuel, older satellites are â€inclined†in higher amplitudes: More than 50 % of all satellites are already in the â€inclination orbitâ€. And their number will be growing! Therefore a non-stop reception is not always possible with bigger antennas. One of the major capacities of this rotor-system is the â€tracking†of such satellites: Even before the TV spectators get aware of any degradation of the image quality, the antenna will follow the satellites†position automatically, fast and perfectly!

One of the most outstanding performance features of the system is its ability to cope with high wind loads. Proved by static approval certificate! The high durability and stiffness of the rotorâ€s steel construction can be recognised at first sight.

Here some other special features of the system:

  • True angle indications for azimuth and elevation
  • Electronic gear backlash compensation
  • Motor lag compensation
  • Selectable positioning tolerances
  • Determination of slow-motion phases
  • Determination of vernier-step graduation
  • Determination of motor delay time prior to new positioning
  • Automatic system test
  • Password for system entries and many other interesting features!

For further information please refer to the detailed installation and operating manual (in German or English language) which is supplied with each azimuth/elevation system.

   ProfiTracker XL picture gallery   

d.  TECHNICAL DATA back to the beginning

Line voltage 220/110 V AC (12 V/24 V DC available)
Power consumption max. 600 VA
Data indication LCD display
Programmable memory up to 400 satellite orbit positions and names
Motor power supply 24 V DC for azimuth and elevation motor
Internal resolution: azimuth 0.01°/pulse
elevation 0.01°/pulse
Pulse reading frequency max. 500 Hz
Analogue sampling rate/
approx. 250 Hz
Dimensions (W × H × D) 484 × 132 × 290 mm
Weight approx. 6 kg
Shipping carton (W × H × D) 62 × 40 × 21 cm
Temperature limits: operational –5 °C to +40 °C
survive & storage –15 °C to +60 °C

Special features 2 separate motors for azimuth and elevation
Motor operating voltage 24 V DC
Motor power max. 100 Watt
Pulse transmitting rate max. 400 Hz
â€Control device to rotor†cable: Logic 10 × 0.6 mm2 shielded (telephone cable has proven successful!)
Motor 4 × 1.5 mm2 (for motor power-supply)
For lengths of more than 20 m a cable of 2.5 mm2 is required, etc.
Control mechanism worm gear
Load transmission pinion gear
Max. azimuth tracking range 360° (endless)
Max. elevation range 90°
Reproduction accuracy for partial load operational range 0.1°
Tracking speed: azimuth approx. 2°/s     ( Other speeds are to be agreed whith the customer )
elevation approx. 1°/s     ( Other speeds are to be agreed whith the customer )
Usable carrying capacity 500 kg (exceeding 400 kg a counter balance could be needed)
Cabinet steel welded construction with weather-proof surface protection
Dimensions: diameter approx. 750 mm
height approx. 750 mm
Click here to see a dimension sketching!
Weight approx. 300 kg
Shipping carton (W × D × H) on Europallet 140 × 80 × 80 cm
Dimension of mechanical connections: antenna mounting surface see sketching
mast mounting surface see sketching
Max. permissible antenna diameter 3.7 m
Max. wind speeds 100 km/h during operation,
180 km/h for 3.7 m antenna (strength proof by static approval certificate!)
Temperatures limits: operational –25 °C to +65 °C
survive & storage –30 °C to +65 °C

Prices on request

Open Animation clip:Animation clip of ProfiTracker XL (1 MB)

Download-Link: Data sheet of ProfiTracker XL (4.3 MB)

      CONTENTS:   capacities/functions | special technical features | system description | technical data | news     

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