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Outdoor Module User Manual

1. asth 0 0 10 0 2 AZ Low speed threshold astp 0 000 90 000 2 AZ Step delta atar 180 000 180 000 Az target value atot 0 32000 msec AZ Motor timeout atsz r o S AZ tracking step size axmd PARALLEL SEQUENTIAL Axes control mode bavg 1 25 samples Level averaging bcfr 1000 000 40000 000 MHz Beacon RX frequency bcip aaa bbb ccc ddd Beacon RX IP address bcof 200 00 0 00 dBm Beacon RX OV level bcsc 5 0000 5 0000 V dB Beacon RX voltage scale bcty SATNMS VOLTAGE Beacon RX type blev r o 4 4 dBm Beacon level brip r o H dB Beacon level ripple btrh 999 00 100 00 dBm Level threshold caps r o 00 FF Software capabilities 1 coty NONE Compass type 2 decl 90 000 90 000 Antenna declination dele 0 99 Delete target diaa 0 0 100 0 m AZ Antenna diameter diae 0 0 100 0 m EL Antenna diameter eabw r o i EL antenna 3dB beamwidth eamp r o EL Amplitude ecal 360 000 360 000 2 EL Calibration offset eclc 2 Calculate offset from El value C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 41 61 SatService Gesellschaft f r Kommunikationssysteme mbH ecoe 1 o see below EL model coefficients ehys 0 000 2 000 R EL Pointing hysteresis einv NORMAL INVERTED EL Sense invert ejtr r o 0 EL Peaking jitter em
2. C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 15 61 CON16 Limit Switches SatService Gesellschaft f r Kommunikationssysteme mbH The limit switch inputs internally are connected to the external 24V GND rails The switches are connected directly to the input pairs without any external ground or supply cabling The ACU treats a closed contact as OK contacts have to be opened to indicate the limit reached condition 24V EXT Example for wiring the limit switches EY CON16 Pin 1 3 5 7 9 11 CON1 Pin 1 3 5 A 7 a CON16 Pin 2 4 6 8 10 12 CON1 Pin 2 4 6 GND EXT Please note that the left right azimuth and polarization limit switches have to be swapped when the antenna is operated at the southern hemisphere pin signal description type 1 AZ High azimuth right limit view from behind antenna IN 2 GNDEXT IN 3 AZ Low azimuth left limit view from behind antenna IN 4 GNDEXT IN 5 El High upper limit Elevation IN 6 GNDEXT IN 7 ElLow lower limit Elevation IN 8 GNDEXT IN 9 Pol High polarization right limit view from behind antenna IN 10 GND EXT IN 11 Pol Low polarization left limit view from behind antenna IN 12 GND EXT IN CON17 Alarm Circuits The alarm stop switch inputs internally are connected to the external 24V GND rails The switches are connected directly to the input pairs withou
3. pin signal description type 1 AUX5OUTC OUT 2 AUX5 OUTE OUT 3 AUX 6 OUT C OUT 4 AUX6OUTE OUT 5 AUX 7 OUT C OUT 6 AUX7 OUTE OUT 7 AUX 8 OUT C optional heartbeat signal OUT 8 AUX 8 OUT E optional heartbeat signal OUT The AUX 8 output may be configured to act as a heartbeat output If enabled the output switches every C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 9 61 SatService Gesellschaft f r Kommunikationssysteme mbH 1000 ms between on off If using this signal for an external watchdog circuit be aware the in adaptive tracking mode delays of some seconds are possible while the acu calculates the orbital model CONS Spare Outputs 1 4 CONS provides another four opto isolated spare outputs for the ACU These inputs are reserved for customized versions of the ACU software they normally are not used There is no cabling required pin signal description type 1 AUX1OUTC OUT 2 AUX1OUTE OUT 3 AUX 2 OUT C OUT 4 AUX2OUTE OUT 5 AUX 3 OUT C OUT 6 AUX 3 OUT E OUT 7 AUX4OUTC OUT 8 AUX40UT E OUT CON6 Beacon Receiver The ACU preferably is used together with the sat nms LBRX beacon receiver With the sat nms LBRX the ACU talks though TCP IP no additional cabling is required in this case At CON6 the ACU provides an analog interface to third party beacon receivers
4. pin signal description type 1 Beacon Level beacon level signal 0 10V IN 2 GND 3 PRESET 1 C beacon receiver preset activation OUT 4 PRESET 1E OUT 5 PRESET 2 C beacon receiver preset activation OUT 6 PRESET 2 E OUT 7 PRESET 3 C beacon receiver preset activation OUT 8 PRESET 3 E OUT 9 PRESET 4 C beacon receiver preset activation OUT 10 PRESET 4 E OUT CON7 Inclinometer The ACU provides two ADC inputs to read the angle information from ratiometric inclinometers like the Schaevitz AccuStar The standard ACU software reads this information and displays it at the Test page of the software but it does not include the nick roll angles into the displayed antenna pointing pin signal description type 1 9V roll reference output 9VDC OUT 2 VRAT X roll measurement input IN 3 GND roll ground 4 9V nick reference output 9VDC OUT 5 VRAT Y nick measurement input IN 6 GND nick ground CONS Serial Interfaces The ACU owns two serial interfaces The first is reserved to poll a GPS receiver in order to get the antenna C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 10 61 SatService Gesellschaft f r Kommunikationssysteme mbH geodetic location automatically Any NMEA standard GPS receiver providing a RS232 interface may be connected here The second interface is used to control the ACU from remote where the TCP IP remote c
5. The checksum byte is calculated using an algorithm as implemented by the following formula sum 32 62 bytefi 22 modulo 95 i l This protocol type is known as MOD95 or Miteq protocol The ACU also packs its reply in a protocol frame as described above Incomplete frames checksum errors or address mismatches let the ACU ignore the message The time between the characters of a message must be less than 5 seconds or the ACU will treat the message as incomplete If the ACU is set to the device address NONE it uses a simple line protocol instead of the framed protocol described above Messages sent to the ACU have to be terminated with a carriage return character ASCII 13 the ACU terminates replies with a CR LF pair ASCII 13 10 There is no echo for characters entered hence this protocol easily may be used for computer based remote control This setting is also used for allowing communication to an optional frontpanel display and keyboard if implemented If TERM is selected the serial interface is used to allow communication between the ACU and a sat nms Handheld This function is not available at ACU RMU and ACU19 Version 7 4 Parameter list The table below shows the complete list of M amp C parameters the ACU knows in alphabetical order For each parameter the valid range and a short description is given C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 39 61 SatService Gesellschaft f r Kommuni
6. In cases where the ACU seems to be too optimistic about the quality of the step track results the maximum model on one or both axes may be limited to a more simple and more noise resistant model Specially inclined orbit satellites which are located close to the longitude of the antenna s geodetic location may require this limitation for the azimuth axis With such a satellite the elevation may move several degrees while the azimuth shows almost no motion Please refer to chapter 8 3 Steptrack 8 4 Adaptive Tracking and 8 5 Program Tracking for more detailed informations about the tracking algorithms Tracking Parameters Page Example C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 28 61 SatService Gesellschaft f r Kommunikationssysteme mbH Tracking mode OFF CLEAR MEMORY Tracking step size 15 Tracking cycle time 180 sec Measurement delay 1500 msec Recovery delay 4000 msec Level averaging 5 samples Level threshold 75 00 dBm Smoothing interval 6h Peak jitter threshold 0 AZ Maximum model type LARGE EL Maximum model type LARGE 5 5 Test Page The page Test displays the electrical logical level of all inputs and outputs of the ACU This helps you to install the ACU or to identify a malfunction of peripheral components Below some information how to interpret the values in this page are given Electrical 1 O Levels The electrical state of an input or output is indicated by the HI LO
7. 3 GND resolver SIN IN 4 COS _ resolver COS IN 5 GND resolver COS IN 6 REF _ drive signal to resolver OUT 7 GND drive signal to resolver OUT 8 GND The ACU resolver interface is designed for resolvers with an impedance of 100 Ohms or more and transfer factor 0 5 The interface applies 4Veff 2000Hz to the resolver drive coil It expects 2Veff at the sine cosine inputs at the maximum positions When connecting a resolver to the ACU please consider the following e Use a shielded twisted pair cable e Connect the cable shield either to pin 1 8 at the ACU or to the ground at the resolver housing Never connect the shield at both ends this will introduce a ground loop and cause a significant degradation of the resolver s accuracy CON18 CON19 CON20 SSI Positional Encoder Interface Below the pinout of a SSI type positional encoder interface board is shown The ACU is available with resolver SSI or analog position sensor interfaces You have to select type of interface when you order the ACU The SSI positional encoder may be powered from the ACU internal power supply 5V and 24V clamps are provided at the connector To avoid ground loops the cable shield should be connected either to pin 1 at the ACU or to the ground at the encoder housing never at both ends pin signal description type 1 GND 2 SSI Data SSI data IN 3 SSI Data SSI data IN 4 SSI
8. voltage never should reach the physical limit of 0V 10V under normal conditions Clamping the level voltage probably will misslead the tracking 8 3 3 Smoothing The peak positions found by the step track may jitter due to noise Specially if an almost stable positioned satellite is tracked with a relatively small antenna this jitter may be more than the real movement of the satellite To stabilize the tracking in such situations the sat nms ACU provides a smoothing function which lets you reduce the pointing jitter The smoothing function is based in the fact that most satellites specially that ones which are on a stable orbit position require the antenna to follow a small amplitude sine function with 24 hours cycle time in order to track the satellite optimally If you activate smoothing by setting the smoothing time to a non zero value all peak positions of the last n hours get averaged by a sine function which matches the measured peaks at the best After each step track cycle the antenna gets moved to the smoothed position rather than to the recently evaluated peak position The usage of the smoothing function is recommended when tracking satellites where the antenna pointing oscillates less than 25 of the antenna s 3dB beamwidth For tracking inclined orbit satellites the usage of smoothing may be problematic as such satellites may require an significant position oscillation at 12 hours cycle time sin 2wt The smoothing function u
9. ACU has the tracking module installed of up to 99 satellites Managing these memories is done with the Targets page The page displays a table with all pointings actually stored By clicking the icons in the table settings may be stored recalled or deleted Go If a memory location has stored a pointing the table shows a blue arrow in the Go column of the table Clicking to this arrow recalls the settings stored for that target and moves the antenna to the stored pointing The ACU displays a confirmation dialog before it actually recalls the target memory Only if you click to Submit in this dialog the antenna moves to the stored location Save For each memory location the table shows a floppy disk icon in the Save column Clicking to this icon saves the actual pointing and tracking parameters if applicable to the selected memory location Again there is a confirmation dialog page before the data actually is saved Delete Analogous to the Save icon the table shows an eraser icon in the Delete column The icons only are shown for the memory locations which are in use Clicking to the eraser icon clears the selected memory location after a confirmation inquiry Numeric The table contains an additional row at the bottom labeled Numeric orbit position Clicking to orbit the blue arrow icon in this row opens a dialog where you are requested to enter the orbit C 2014 SatService GmbH www satnms com AC
10. ACU knows two axes control modes The PARALLEL mode treats the azimuth elevation axes independently If a new pointing is commanded both motors are activated in parallel the antenna moves to the new location in the shortest possible time In SEQUENTIAL mode the ACU does not move the elevation axis while the azimuth motor is running The antenna movement is done sequentially First azimuth then elevation You should prefer the PARALLEL mode unless special conditions require a sequential antenna movement The performance of the ACU in terms of pointing speed and wind load compensation will be much better in PARALLEL mode Date F time By changing this value you can set the internal clock of the ACU The clock is set as soon you click to the Submit button in the data entry dialog The most precise method to set the time is to enter a time one or two minutes ahead and click to Submit when this time is reached RS485 address With this parameter you select the device address used control the ACU through a serial interface See chapter 7 3 The RS232 remote control interface for more information about this At ACU RMU and ACU19 this parameter has to be set to NONE If you use a sat nms Handheld this parameter has to be set to TERM The Handheld function is not implemented in ACU RMU and ACU19 Version C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 30 61 SatService Gesellschaft f r Kommunikat
11. Be aware that the clock in the ACU must be set precisely to make the feature work as expected 8 5 2 File Format The program txt file is a plain text file containing a three or four column table Empty lines are ignored comments starting with a as well The numbers in the table are parsed as floating point numbers which only may consist of decimal digits one decimal point ans an optional leading if negative The columns must be separated by an arbitrary number of space or tabulator characters They have the following meanings 1 time stamp The time stamp must be a Julian date with the time of day coded as a fraction of a day Example The Julian date for the common base of most computer clocks 1970 01 01 00 00 00 is 2440587 5 C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 59 61 SatService Gesellschaft f r Kommunikationssysteme mbH 2 azimuth The azimuth angle in degrees angle 3 elevation The elevation angle in degrees angle 4 polarization The polarization angle in degrees This column is optional no polarization pointing is angle commanded if this column is missing Memory space is very limited in the ACU ODM The file size is limited to 64 Kbytes being equivalent to about 12 days of AZ EL data in 10 minutes intervals 8 6 Faults and Tracking There are different faults which could occur during operation Please also refer to chapter Operation Below is a
12. C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 18 61 SatService Gesellschaft f r Kommunikationssysteme mbH configure the ACU the following equipment is required e The sat nms ACU ODM itself e a 24V DC power supply e A Computer running a Microsoft Windows operating system equipped with CD ROM drive and Ethernet network card e ACAT5 crossover network cable or an Ethernet hub and standard network cables to connect the ACU and the computer e The CD ROM shipping with the sat nms ACU ODM Setting the ACU s IP parameters now is easily done within a few minutes 1 First install a network cable between the ACU and your computer If you have a crossover cable available this is very easy simply put the cable into the network connectors of computer and ACU Without a crossover cable you need to connect both the computer and the ACU to the same network hub using two standard network cables It is essential that the computer and the ACU are connected to the same network segment the configuration program is not able to find the ACU through routers or network switches 2 Now power on your computer and connect the ACU to the 24V DC power supply 3 Insert the CD ROM into the computer s drive and inspect it s contents through the My Computer icon on your desktop Double click to the ChipTool exe program in the ChipTool directory 4 When the ChipTool program is running the program shows a list containing at least o
13. Distribution CON12 provides eight clamps to the GND EXT rail It has been included to simplify the external cabling pin signal description type ND EXT ND EXT ND EXT ND EXT ND EXT ND EXT ND EXT OND Us RP w n m QAIA IA IAA Qs AQs a ND EXT CON15 Polarization Motor Driver All signals for motor control are provided as free floating opto coupler inputs outputs This gives a maximum of flexibility to adapt the cabling to the motor driver units They probably will combine one end of the control inputs to a common potential The ACU is capable to control motor drivers with different polarity concepts C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 14 61 SatService Gesellschaft f r Kommunikationssysteme mbH Example for wiring the motor drive signals v Pin 1 3 5 7 9 11 i i IN GND EXT E Pin 13 QUT Example for wiring the motor status a 2 signals 2K2 Je y i CON10 13 15 k i OUT 24V EXT 2 GND EXT i The ACU knows two different configuration modes to control a motor driver They are called DIR START and DUAL START In DIR START mode the FWD signal switches the motor on off the REV signal controls the motor direction This is the configuration many frequency inverters use In DUAL START mode the FWD signal switches the motor on in forwa
14. Handheld www satnms com 5 STOP Emergency STOP stops all Motors immediately it has to be released by pushing the button RE SET Releases the motor lock that was set by pushing the STOP button REDRAW Back to start screen POL Turns the polarisation counterclockwise CCW STEP Selects the step size small steps x keypress x is the value that was set on the setup SIZE screen large steps 10 x keypress continuous mode the antenna moves as long until the button is pushed or a limit switch or limit value is reached POL Turns the polarisation clockwise CW 4 Moves the antenna up EL de Moves the antenna to the left AZ HALT Stops the antenna movement only in continuous mode Moves the antenna to the right AZ 1 Moves the antenna down EL C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 36 61 SatService Gesellschaft f r Kommunikationssysteme mbH 6 Frontpanel operation The sat nms ACU ODM and ACU ODU do not provide frontpanel operation For these units we provide an optional handheld for local controlling and monitoring without a laptop Please refer to chapter 5 7 Handheld Terminal for more informations C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 37 61 SatService Gesellschaft f r Kommunikationssysteme mbH 7 Remote Control The sat nms ACU may be controlled remotely by a monitoring and contr
15. collection of all this faults There are the following cases for a fault of one axis TIMEOUT and FAULT are releasable during a tracking cycle A STOPPED fault have to be released with the RESET button e Jump Values of angle encoder 5 in azimuth and elevation or 10 in polarisation STOPPED e Antenna moves 5sec into the wrong position STOPPED e Motor timeout occur because of no antenna movement within the entered time TIMEOUT e Motor fault input triggered for example from frequency converter FAULT There are the following cases for a STOPPED fault of all axes together which have to be released with the RESET button e Trigger emergency stop input e Click the STOP button on the web interface All faults are released by clicking the RESET button on the web interface or by sending the remote command mrst 0 The RESET button activates the MOTOR RESET outputs of all three axes for a quarter second and delete the fault flags All target angles are set to the actual value to suppress an immediate movement of the antenna If a TIMEOUT or FAULT occur during a tracking cycle in one axis and the cycle is canceled the ACU will retry after 2min again according to the setting of Retry after motor fault NEVER ONCE FOREVER The retry is a RESET which activates the MOTOR RESET outputs of all three axes for a quarter second and delete the fault flags All target angles are set to the actual value to suppress an immedia
16. commonly used ephemeris data sets for geostationary satellites Chapter 8 5 0 Program Tracking describes this tracking mode more detailed CLEAR MEMORY Clicking to this mark clear the tracking memory You should do this when you start to track a new satellite Clearing the tracking memory about half an hour after tracking started significantly improves the quality of the first C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 26 61 SatService Gesellschaft f r Kommunikationssysteme mbH adaptive tracking model which will be evaluated after 6 hours of tracking This is because the model does not get disturbed by the first search steps the antenna does until the optimal pointing to the satellite is found Tracking step size The tracking step size is a very important parameter for the performance of the tracking It defines the size of every depointing step the ACU makes in order to find out where the optimal antenna pointing is Setting too high values will cause significant signal degradations during the step track cycle because the antenna moves a too large amount away from the satellite Setting the value too small will let the beacon level jitter mask the level differences caused by the test steps the antenna will not track the satellite properly The step size is specified as a percentage of the antenna s half 3dB beamwidth The ACU calculates the beamwidth from the antenna diameter and the beacon freque
17. coupler input and output low and high speed selectable M amp C Interface Specification Ethernet interface for M amp C and user interface 10 Base T Via http GET requests RS232 RS422 M amp C Interface Mini Combicon MCV1 Summary fault indication Relay contact Mini Combicon MCV1 Electrical and Mechanical Specification Environmental Conditions Supply Voltage 22V to 28V unregulated DC 500mA Temperature range Humidity 5 to 40 C up to 90 non condensation DIN rail module 425x105x60mm C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 61 61
18. if nothing collides 7 Set the soft limits to the desired values e g 1 before the hardware limit switch is activated C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 20 61 SatService Gesellschaft f r Kommunikationssysteme mbH 4 3 5 Pointing Tracking Now the setup of all interfaces to the antenna is done By this everything is prepared to configure the ACU to the desired operation mode to save targets and finally to set the sat nms ACU ODM into service In chapter 5 Operation you find a detailed description of the pointing and tracking parameters To use the function pointing by stating an orbit position you have to configure the Location parameters on the setup page to the geodetic location of your antenna Take care to type in position with enough accuracy 0 001 For further informations please refer to chapter 5 6 Setup for location parameters and 5 3 Target Memory for using this pointing function 4 3 6 Backup of ACU settings The last step that is recommended to be done is the backup of ACU settings By this way an easy replacement of the ACU ODM could be performed The following step by step description shows how to do this 1 Open the chiptool 2 Right click to the desired unit A drop down list will open choose FTP 3 A small window like shown on the following picture will be opened Please double check the displayed IP you might adjust it in the drop down list here Connect servic
19. label displayed with the signal HI means that current is flowing through the optocoupler for this input or output LO means that no current flows As some signals are defined to be true when a switch is opened the electrical level of the signal not necessarily describes the logical level of this signal too Logical 1 O Levels The logical level of an input or output is described by it s color Green means this signal is inactive OK or false Read means the signal is active or true Toggling output levels manually The Test page also lets you toggle the actual state of each output signal simply by clicking to the underlined HI LO mark of the signal If you do this you should consider the following e The ACU sets the motor driver outputs eight times a second for each axis having the motor driver type set to DIR START or DUAL START This immediately will overwrite any change you make If you want to test if the motor driver outputs command the motor driver as expected switch the motor driver type for this axis to NONE at the Setup page before you set the outputs manually e The Test page is re read by the Web browser about once a second Some browsers seem to ignore mouse clicks occasionally due to the screen refresh Adaptive tracking coefficients In adaptive tracking mode the ACU displays the coefficients of the actual model in two lines at the bottom of the text page The number of coefficients displayed depends on the
20. least significant bit bit number 7 the most significant bit in this number no name description 0 APEAKFLT azimuth peaking fault 1 EPEAKFLT elevation peaking fault 2 MODELFLT model match fault 3 JITTRFLT __ jitter fault 4 not used 5 not used 6 not used 7 not used Tracking coefficients on acoe ecoe In adaptive tracking mode the acoe ecoe commands may be used to read the coefficients of the actual model The coefficients are returned as a comma separated list of numbers in scientific notation The number o f coefficients returned depends on the size of the model SMALL a0 a1 a2 1 MEDIUM a0 a1 a2 a3 a4 2 LARGE a0 al a2 a3 a4 a5 3 If the beacon signal drops below it s theshold the antenna movement is calculated from these coefficients using the formulas shown below Amai Agt A COS wt a sin et 1 nedium Ag 4 cos wt asin wt a cos 2 wt a sin 2 wt 2 Furge dot a COS wt a sin wt azcos 2 wt a sin 2 wt Hast 3 7 5 One line read via TCP IP For compatibility with the sat nms power sensor the ACU also may be polled for an automated monitoring C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 47 61 SatService Gesellschaft f r Kommunikationssysteme mbH by the requesting the position document with aHTTP GET command Assuming the ACU listens to the IP address 10 0 0 1 the complete URL f
21. more susceptible it is to noise For practical usage there have to be used varying models depending on the amount and quality of the recorded steptrack data Models The ACU uses three different mathematical models to describe the movement of the antenna while it tracks the satellite All models are based on sinusoidal functions with a cycle time on an sidereal day The models called SMALL MEDIUM and LARGE differ in their complexity C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 55 61 SatService Gesellschaft f r Kommunikationssysteme mbH MEDIUM ee LARGE The SMALL model the simplest one emulates the true antenna movement with a plain sine function There are only three parameters with this model the nominal antenna pointing and the amplitude phase values of the superposed sine This model is very stable gives reliable results even with only a few measured step track peaks Unfortunately the SMALL model does not fit optimally for all satellites The MEDIUM model superposes a second sine wave with the double frequency two cycles for one sidereal day The model matches very good for almost all stationary satellites It however requires more and also more precisely measured data points to give reliable results The MEDIUM model is fully compatible to the SMALL one this means that also satellites for which the antenna must follow a plain sine function may be tracked with the MEDIUM model The a
22. must be cabled as follows FWD moves the antenna to the west to the right on the northern hemisphere The evaluation routines in the software which compute the antenna pointing for a given satellite location require the movement direction in this way The AZ RESERV reflects the motor stopped state of the axis ON signals the OK state the signal turns off in case of a motor fault timeout or if the emergency stop signal is received Depending on the reason of the motor stop a motor reset command may be neccessary to release the axis from this state pin signal DUAL START DIR START type 1 AZ FWD E ON motor on right ON motor on OUT 2 AZFWDC OFF motor off OUT 3 AZREVE ON motor on left ON direction left OUT 4 AZREVC OFF direction right OUT 5 AZ SPD1E ON slow ON slow OUT 6 JAZSPDIC OUT 7 AZ SPD2E ON fast ON fast OUT 8 AZSPD2C OUT 9 AZ RES E reset driver reset driver OUT C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 12 61 10 AZRESC OUT 11 AZ RESERV E axis stopped axis stopped OUT 12 AZ RESERV C OUT 13 AZ FAULT K driver fault driver fault IN 14 AZFAULTA IN CON11 24V EXT Distribution SatService Gesellschaft f r Kommunikationssysteme mbH CON11 provides four clamps to the 24V EXT rail It has been included to simplify the external cabling pi
23. step move use following commands command description 1 Azimuth large step left l Azimuth small step left r Azimuth small step right rr Azimuth large step right dd Elevation large step down d small step down u small step up uu large step up c Polarisation clockwise step cc Polarisation counter clockwise step 6 Use the time parameter to read the actual time used by the ACU Use the stim parameter to set the time 7 This parameter reports the description name and pointing angles for a given target number tdsc 12 e g is interpreted by the ACU as a request to report the target description for target no 12 The reply to this command is something like tdsc ASTRA 19 2 167 335 43 412 15 455 8 ACU variants without tracking support only accept NONE for this parameter Bit definitions in ibit input bits and flags The ibit value is returned as a 32 bit hexadecimal number The bit number 0 means the least significant bit bit number 31 the most significant bit in this number no name description 0 IN_PLHLM polarization hi limit 1 IN_PLLLM polarization lo limit 2 IN_PLFLT polarization motor fault 3 IN_HBFLT antenna hub fault 4 IN_AUX1 reserved 5 IN_AUX2 reserved 6 IN_AUX3 reserved 7 IN_AUX4 reserved 8 IN_AZHLM azimuth hi limit 9 IN_AZLLM azimuth lo limit 10 IN_AZFLT azimuth motor fault 11
24. the ACU uses a smaller less complex model than with a completely filled tracking memory A amplitude The amplitude of the antenna movement in this axis expressed as a percentage of the full 3dB beamwidth J jitter The jitter of the antenna movement in this axis expressed as a percentage of the full 3dB beamwidth B beamwidth The 3dB beamwidth as calculated by the ACU from the antenna diameter in this axis and the beacon receive frequency This is the full beamwidth the angle between both 3dB points in the antenna pattern S step size The absolute step size used by the step track in this axis Time The actual time of the ACU s internal clock GPS State The actual state of an external GPS receiver connected to the ACU if applicable Antenna Pointing Page Example Azimuth Elevation Polarization 219 089 27 471 70 049 Target value 219 080 Target value 27 461 Target value 70 082 Target name SES4 22 W RX 11451M003 Tracking mode ADAPTIVE SLEEPING sleep 317s fill 111 1h age 0 0h Beacon level 82 54 dBm var 0 00 dB Temperature 36 8 C ACU Faults Tracking Faults AZ Tracking State M SMALL A 11 J 1 B 0 496 S 0 056 EL Tracking State M SMALL A 15 J 2 B 0 496 S 0 050 Time 2012 11 27 12 42 37 GPS State DISABLED 5 3 Target Memory The page Targets gives access to the ACU s target memory The ACU is capable to remember the pointing and tracking parameters if the
25. ticks 00000000 FFFFFFFF equivalent to the full range of the encoder 0 360 with single turn encoders The pre scale offset must be adjusted to avoid any 7FFFFFF to 8000000 overflow within the used range of the encoder The value is added to the encoder reading neglecting an overfly eventually occurring Thus the offset implements a 360 turnaround automatically The pre scale offset may be computed and set manually or by assistance of the ACU s automatic calibration function as described below Post scale The post scale calibration offset is added to the position value before the angle value is offset displayed but after the scaling is applied The post scale offset is defined in degrees of AZ EL POL The ACU provides a function to calculate and set both the pre scale and the post scale offset from a known pointing C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 31 61 SatService Gesellschaft f r Kommunikationssysteme mbH 1 Set the calibration scale gear ratio for the axis this calibration parameter is described with the next paragraph 2 Set the soft limits of the axis to preliminary values In most cases this needs not to be very accurate the ACU needs this information to calculate the pre scale offset to shift the encoder overflow outside the used range 3 Optimize the satellite pointing for the reception from a satellite for which the azimuth and elevation values are known 4 Click
26. to the calc label beside the calibration offset Enter the known pointing angle for the satellite and click to submit 6 The ACU calculates and sets the calibration offsets to a value so thatthe actual pointing is displayed as the angle you entered gl For the azimuth axis there is another offset which also is taken into account the Antenna course This value is provided for mobile applications where a compass reading has to be included into the azimuth value Calibration Normally the ACU assumes that the full range of a position sensor corresponds 360 If you scale are using a multiturn position sensor or if the position sensor is mounted to the shaft of a gear rather than to the antenna axis directly the position sensor reading must be scaled The displayed angle is computed as follows displayed value raw reading pre scale offs scale pos scale offs Mathematically a scale value of 1 0 disables the scaling Beside this the ACU also accepts the special value 0 to disable scaling at all If you set 1 0 the ACU performs the scaling with this factor With the value 0 the scaling is skipped completely including the conversion of the reading to floating point This ensures that the full accuracy is retained in cases where no scaling is necessary Sense With this parameter you easily can reverse the sense of a position sensor The sense should invert be as follows e Azimuth The antenna looks more to the west fo
27. ACU ODM UM 1411 Page 6 61 SatService Gesellschaft f r Kommunikationssysteme mbH 3 The sat nms ACU ODM The sat nms Antenna Control Unit Outdoor Module is an antenna controller positioner with optional satellite tracking support It may be operated as a stand alone unit or in conjunction of the sat nms ACU IDU a PC based indoor unit which offers extended tracking capabilities and a full featured visualization interface The ACU ODM is designed as a closed compact module prepared for mounting on a 35mm DIN rail Below the top viw and connector layout of the ACU outdoor module is shown Except the network connector which is a standard 10 Base T Ethernet socket all connectors are Phoenix Contact Combicon plugs clamps CON17 CON16 CONI5 CON14 CON13 CON12 CON11 CON10 CON20 CON19 CON18 Stop Alarm Limit Switches Polarization Motor GND Extern Elevation Motor GND 24V AZ Motor Azimut Elevation Polarization sat nms ACU ODM ACU RES ACU RES ACU RES CON1 LAN con2 CON3 CONS CONS CONG con CONS CONS AUXIN 24V Extern AUX OUT AUX OUT Beacon RX Inclinometer RS232 422 fuse 24V E sts Inside the ACU consists of a main board and two or three interface boards with the circuitry for the position sensors These boards are different for each type of position sensor Actually interfaces for three types of position encoders are available with the sat nms ACU an e resolvers e SSI digital posit
28. CLK SSI clock OUT 5 SSI CLK SSI clock OUT 6 C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 17 61 SatService Gesellschaft f r Kommunikationssysteme mbH 7 5V encoder power supply 8 24V encoder power supply CON18 CON19 CON20 Analog Angle Sensor Interface Below the pinout of an analog type positional sensor interface board is shown The ACU is available with resolver SSI or analog position sensor interfaces You have to select type of interface when you order the ACU pin signal description type 1 AGND analog ground OUT 2 INPUT A D converter input IN 3 REF reference voltage OUT 4 AGND analog ground OUT 5 15V opt optional DC out OUT 6 15V opt optional DC out OUT vi 9V opt optional DC out OUT 8 GND digital ground OUT 4 2 3 Power Supply Cabling The ACU uses opto coupler interfaces to the motor drivers limit switches etc This permits to use a complete separate power supply with a separate ground for these circuits To simplify the cabling of these circuits the ACU distributes the external 24V and GND lines through a separate set of clamps 4 3 Start up This chapter describes how to install and start up the sat nms ACU ODM It is a step by step description without detailed description If you need more detailed description for e g some parameter settings please refer to chapter 5 Operation all of the p
29. CU you want to control The ACU shows a web page consisting of a navigation bar at the left side of the browser window and the actual antenna pointing in the main part of the window The readings automatically refresh once a second The refresh rate may be adjusted on the setup page from software version 2 1 007 or higher The navigation bar at the left contains a couple buttons which build the ACU s main menu Pointing Pointing This button switches back to the main page you already see when you connect B Target to the ACU This page displays the actual antenna pointing together with some status information You also use this page to move the antenna to a certain pointing given as amp Tracking azimuth elevation values Q Test soup Target By clicking to this button you switch to the Target page where you can store and recall the antenna pointing for up to eight satellites WO Help Tracking sat nms ACUs with the tracking option installed offer the tracking mode and San one tracking fine tune parameters on this page br Test By clicking to this button you switch to the Test page The Test page shows the vals low level I O signals of the ACU It helps you to install the ACU or to identify a malfunction of peripheral components og Setup This button switches to the Setup page which lets you inspect or change less STOP RESET common parameters which usually are set only once to adapt the ACU to it s work
30. IN_EMERG emergency stop C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 45 61 12 IN_ELHLM elevation hi limit 13 IN_ELLLM elevation lo limit 14 IN_ELFLT elevation motor fault 15 IN_COPEN cabinet open 16 AZMOV azimuth moving 17 ELMOV elevation moving 18 PLMOV polarization moving 19 MOVING moving summary bit 20 AZTOT azimuth timeout 21 ELTOT elevation timeout 22 PLTOT polarization timeout 23 TIMEOUT timeout summary bit 24 TRKPEAK peaking in progress 25 LOWBEAC low beacon signal 26 BCRXFLT beacon receiver fault 27 LIMIT limit switch summary 28 AZSTOP azimuth stopped 29 ELSTOP elevation stopped 30 PLSTOP polarization stopped 31 GPSFLT GPS receiver fault Bit definitions in obit output bits SatService Gesellschaft fiir Kommunikationssysteme mbH The obit value is returned as a 32 bit hexadecimal number The bit number 0 means the least significant bit bit number 31 the most significant bit in this number no name description 0 OUT_AZ_ FWD azimuth motor forward 1 OUT_AZ_REV azimuth motor reverse 2 OUT_AZ_SPD1 azimuth motor low speed 3 OUT_AZ_SPD2 azimuth motor hi speed 4 OUT_AZ_RESET azimuth motor driver reset 5 OUT_AZ RESERVE reserved for extended motor control 6 OUT_AUX1 not used 7 OUT_AUX2 not use
31. NMP trap Sets the SNMP community string sent with traps The default is public community SNMP This parameter decides if the SNMP traps are enabled or disabled SNMP The ACU replies to MIB II sysName requests with the text entered at this place SNMP The ACU replies to MIB II sysLocation requests with the text entered at this place system location SNMP The ACU replies to MIB II sysContact requests with the text entered at this place system contact MIB File click here to download the MIB file SNMP trap Enter up to 4 trap destination IP addresses dotted quad notation to make the ACU sending IP 1 4 traps by UDP to these hosts Setting the parameter to 0 0 0 0 disables the trap generation Access Control User Here you can define the password for the user login Default password is user When you password are logged in as user you can command the antenna pointing set the tracking parameters if applicable and store recall targets You can t modify the setup parameters or issue low level commands on the test page while logged in as user Admin Here you can define the password for the admin login Default password is admin When password you are logged in as admin you have full access to all parameters of the ACU including the setup and the tweaks on the test page C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 34 61 Genera
32. ODM UM 1411 Page 53 61 SatService Gesellschaft f r Kommunikationssysteme mbH e At the sat nms LBRX the ACU s IP address must be set as the UDP destination address The setting VOLTAGE is used with any other type of beacon receiver or with a sat nms LBRX beacon receiver which has no TCP IP connection to the ACU When operating in SATNMS mode the ACU will automatically determine the beacon frequency from the sat nms beacon receiver Also the beacon receiver s background activities like frequency tracking and noise reference measurements get synchronized to the step track sequence in this mode These features are not available in the VOLTAGE operating mode Beacon RX IP address You need to enter the beacon receiver s IP address in dotted quad notation here if the receiver tape is set to SATNMS Beacon RX voltage scale These parameters define the slope and offset of the beacon level voltage The Beacon RX OV level values must be set to match settings of the beacon receiver With the sat nms LBRX beacon receiver you can set these parameters there as well chapter 8 3 2 ACU And Beacon Receiver explains how to find the best settings for this The parameters in the table below are to be set individually for each satellite They are set at the Tracking page and stored with each target memory Beacon RX frequency This parameter is only of interest if a third party beacon receiver is used The beaco
33. SatService Gesellschaft f r Kommunikationssysteme mbH IP configuration by serial number or MAC ID Serial number or MAC ID 003056806914 Chip IP configuration Help IP Address 192 168 2 81 J Close Network mask 255 255 255 0 Gateway 192 168 2254 Interface 2 Index jo Use DHCP Configure default ethemet interface Now the IP configuration of the ACU is completed You may finally want to test if the ACU is reachable now Start your web browser and type the ACU s IP address into the URL field of the browser The ACU should reply with it s main page provided that the ACU and your computer are configured for the same subnet 4 3 2 Limit switches Connect the limit switches to the sat nms ACU ODM as described in chapter 4 2 2 Pin description 1 Apply 24V DC to the ACU ODM Take care that the motor drivers are not powered up yet The sat nms ACU ODM should be reachable via Ethernet now 2 Check the function and correlation of all limit switches manually On the sat nms ACU ODM main webpage a limit fault is shown as soon it occurs On the test page every single limit switch is displayed For more detailed informations see chapter 5 Operation 4 3 3 Angle detectors Connect the angle detectors to the sat nms ACU ODM as described in chapter 4 2 2 Pin description 1 Configure the desired type of detector on the setup page 2 Set the soft limits to the expected values at first it is ok
34. The contents of the tracking memory must be erased when the ACU starts to track a new satellite This is done in the following situations C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 57 61 SatService Gesellschaft f r Kommunikationssysteme mbH e Astored position target is recalled e The ACU is switched off e CLEAR MEMORY is chosen at the tracking parameters page If a new antenna position is entered by setting the azimuth elevation angles explicitly the ACU does not know the new position is a manually optimized one for the current satellite or the position of another satellite The tracking memory is not erased in this situation If the new position belongs to a new satellite the tracking memory must be erased manually by clicking to CLEAR MEMORY at the tracking parameters page Beside this it is recommended to perform a CLEAR MEMORY about half an hour after tracking a satellite starts the first time This erases the first search steps to the satellite s position and significantly improves the quality of the first adaptive model which will be calculated 6 hours later Saving the memory contents The ACU provides one persistent memory location where the tracking memory may by saved into on an operators request This may be useful to track another satellite for a couple of hours and then to return to the first satellite If the tracking memory has been saved before the antenna has been moved to the se
35. U ODM UM 1411 Page 25 61 SatService Gesellschaft f r Kommunikationssysteme mbH position position of a satellite you want the antenna to point to After you pressed Submit in this dialog the ACU computes the antenna pointing for the orbit position you entered and immediately moves the antenna to the calculated position To make this function work satisfactory it is necessary to have the geodetic location of the antenna entered at the Setup page with a sufficient accuracy The first target location labeled adaptive tracking memory is reserved for special purposes If you store to this target location this saves the tracking parameters and the tracking memory as well When this memory location is recalled later on the parameters and the memory contents are restored This may be useful to track another satellite for a couple of hours and then to return to the first satellite If the tracking memory has been saved before the antenna has been moved to the second satellite it may be restored after the antenna returned to the old position You should not use the first target location for general purposes in order to keep it available for the short time storage described above Targets Page Example Target Go Save Delete 0 ADAPTIVE TRACKING MEMORY El 1 19 2 E 1G 11698_8 166 029 34 152 9 131 E P 2 8 E AB2 11703982 202 275 32 979 12 300 gt E P 3 Intelsat 901 18 214 430 29 924 30 152 gt El P 19 8 E AB2 Track
36. URL http 10 0 0 1 rmt levl C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 38 61 SatService Gesellschaft f r Kommunikationssysteme mbH Will let the ACU reply the actual beacon level in a one line text document levl 52 31 This way all parameters may be queried or set you may use your favorite web browser to try out the remote control of the ACU manually 7 3 The RS232 remote control interface Beside the network interface the ACU also provides an RS232 serial port which can be used to control the device remotely Depending on the device address set the ACU either runs framed protocol with start stop characters and checksum or it provides a dumb terminal interface The RS232 interface always operates at 9600 baud no parity 8 data bits one stop bit This interface is not yet implemented in the ACU19 and ACU RMU At these versions you have to select NONE to enable the function of optional frontpanel display and keyboard If another setting is selected an optional frontpanel and keyboard has no function If an address A G is selected the ACU expects each message it receives to be packed into a frame as described below char example description 1 start character always 2 A device address A G 3 l first character of the message body e message body v l n 1 last character of the message body n end character always n 1 checksum
37. adjusted on the setup page from software version 2 1 007 or higher The table below describes the information shown by this page Parameter Description Name Azimuth The bold printed figures show the actual antenna pointing angles as read from the position Elevation sensors If the polarization axis is not controlled by the ACU is displayed in the Polarization polarization field Xx target Below the measured angles the ACU displays the target values of the antenna pointing The value target values are the angles which have been commanded to the ACU You may click to a target angle in order to change the pointing manually The ACU display a dialog page where you can enter the new pointing angle If you click to the SUBMIT button in this dialog page the antenna immediately moves to the new position To go back to the main page without changing the pointing click to the Back button of your Web browser Axis state Below the target values for each axis there is a field reserved which contains some state flags information for this axis While the motor is running MOVING is displayed at this place If the motor has been stopped due to a fault or an emergency stop request a red label STOPPED is displayed Finally if the ACU recognizes the activation of a limit switch the orange colored label LIMIT is displayed in this field Target name The name of the satellite the antenna is pointing to Click to
38. antenna following the path described in the file This way of tracking has a couple of advantages e There is no beacon receiver needed e Even very low elevation satellites may be tracked e Also objects which are not in a geostationary orbit may be tracked for a couple of hours provided that the object of interest does not move to fast The main disadvantage of program tracking is that prediction calculations for stationary satellites always are only valid for a couple of days then a new file must be calculated and loaded to the ACU 8 5 1 Practical Usage To use the program tracking facility of the ACU follow the step by step instructions below 1 Create a program txt file with the antenna pointings you want to track SatService GmbH offers a PC Software for this purpose which calculates the antenna pointing from commonly used ephemeris data sets for geostationary satellites You also may create the file by your own means The file format is described in chapter 8 5 2 File Format 2 Set the tracking interval parameter to a value significantly below the intervals between the position entries in the file Setting it to 60 seconds will work with most applications 3 Switch the tracking mode to PROGRAM The antenna will move as defined in the program txt file The ACU polls the file every tracking interval seconds and moves the antenna if it finds a table entry which is time stamped within the next tracking interval
39. arameters are described here Before you start please first read the Safety Instructions chapter It contains some important recommendations to prevent damage from the ACU Then we strongly recommend to do a first setup of the ACU on a lab desk before installing it at it s final location This is mainly for the following reason To setup the ACU s IP parameters the PC used for configuring and the ACU must either be connected to the same Ethernet hub or must be connected directly with a crossover cable The initialization program does not work through routers or intelligent network switches Hence the typical sequence of tasks when putting an sat nms ACU outdoor module into operation is as follows Read the chapter Safety Instructions Set the ACU s IP address Mechanically mount the ACU Connect the ACU to the antenna position encoders limit switches and motor drivers Finally connect the UPS power supply and the Ethernet network Start up the system and set the parameters as described below As last step connect the power supply of the motors and start them up as described below PUN On 4 3 1 Setting the IP Address Before you can operate the sat nms ACU ODM you need to set the ACU s IP address There is a special configuration program on the documentation CD shipping with the ACU for this purpose We recommend to configure the ACU s TCP IP settings before you install the sat nms ACU ODM at it s final place To
40. at the Setup page To ensure that the motor stands still when the target position is reached twice the resolution step size of the position sensor encoder must be set Common values are bit resolution angular resolution recommended hysteresis 13 bit 0 044 0 090 16 bit 0 005 0 012 17 bit 0 003 0 006 If the motor control loop still oscillates with the recommended hysteresis values this is due to the off carriage of the antenna drive Either turn down the motor speed at the motor driver unit or enlarge the hysteresis value in this case Motor drive signals The sat nms ACU ODM the core module provides a number of output signals to control a motor driver unit These signals they are available for all three axes are FWD Depending on the motor driver type configured this signal generally switches the motor on for both directions or for the forward direction only REV Depending on the motor driver type configured this signal reverses the motor direction or it activates the motor in reverse direction SPD1 This signal is active while the ACU wants to run the motor slowly SPD2 This signal is active while the ACU wants to run the motor fast RESET The ACU activates this signal for 800 msecs if the operator clicks RESET The signal may be cabled to an input of the motor driver which resets latching faults FAULT The ACU monitors this signal all the time The signal is lo
41. ax 0 000 90 000 2 EL Upper limit emdt r o character string EL Model type emin 0 000 90 000 2 EL Lower limit emmx SMALL MEDIUM LARGE EL Maximum model type emot DUAL START DIR START NONE EL Motor driver type epos r o 0 000 90 000 E EL Pointing eraw r o 00000000 FFFFFFFF EL raw pointing esca 0 000000 100000 000000 EL Calibration scale esen SSI 13B SSI 13G SSI 17B SSI 17G SSI 18B SSI 18G SSI 19B EL Position SSI 19G SSI 20B SSI 20G SSI 24B SSI 24G RESOLVER sensor type VOLTAGE NONE esth 0 0 10 0 2 EL Low speed threshold estp 0 000 90 000 g EL Step delta etar 0 000 90 000 g El target value etot 0 32000 msec EL Motor timeout etsz r o R EL tracking step size goto 0 99 Goto target gpty NONE GPS receiver type 3 ibit 00000000 FFFFFFFF Input bits described below icty NONE Inclinometer type 4 jtrh 0 100 Peak jitter threshold mdly 0 9999 msec Measurement delay mstp 0 1 1 stops all motors C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 42 61 SatService Gesellschaft f r Kommunikationssysteme mbH STOP at the Web UI 0 releases the stop RESET at the Web UD nick r o 90 0 90 0 E Nick angle niko 90 0 90 0 2 Nick offset note character string Note obit 00000000 FFFFFFFF Output bits described below orbt 180 000 180 000 E Orbit positi
42. beacon level drops below this value the ACU raises a fault signal Steptrack is inhibited while the beacon level is too low the antenna position freezes Recovery delay After the the ACU has done the tracking steps for the elevation axis it waits some time before it starts tracking the azimuth axis This is to let the beacon level settle after the final position has been found A typical value for this parameter is 4000 msec Measurement delay During a steptrack cycle the ACU positions the antenna to a certain offset and then measures the level Between the moment when the antenna reached commanded position and the beacon level measurement the ACU waits some time to let the beacon level settle The optimal delay value depends on the beacon receiver s averaging post detector filter setting and is a quite critical for the steptrack performance If the delay is too short the beacon voltage does not reach its final value the steptrack does not properly recognize if the signal gor better or worse after a test step If the delay is too long the impact of fluctuation to the measures level grows and may cover the small level difference caused by the test step With the sat nms LBRX beacon receiver best results are achieved if the receiver is set to 0 5 Hz post detector filter bandwidth and a measurement delay of 1500 msec Smoothing interval This parameter controls the smoothing function Setting it to zero disables smoothing A detailed desc
43. beacon receiver Applicable only in SATNMS mode RX IP address Beacon The scale factor for the analog beacon level input The value must match the scaling of the RX beacon level signal voltage scale Beacon The beacon level which is displayed if the ACU recognizes OV beacon level input RX OV level Location Parameter Description Name GPS Defines the type of GPS receiver the ACU uses to read its geodetic location receiver type NONE tells the ACU that no GPS receiver is connected The geodetic position of the Antenna has to be entered manually The ACU synchronized its internal clock to the CMOS clock chip on the board NMEA tells the ACU to expect messages from a NMEA GPS receiver connected to the serial interface at CON8 pins 1 3 The ACU automatically sets the antenna s geodetic location to the values received and synchronizes the clock to the GPS timestamps If no NMEA messages are received the ACU states a fault Antenna The Antenna course is an additional offset which is included into the azimuth calibration It is course used for mobile antennas to set the orientation of the antenna without recalibrating it For stationary antennas this value always should be set to 180 Antenna The geodetic longitude of the antenna For a precise orbit to pointing calculation this value longitude should be entered with 0 001 accuracy Antenna The geodetic latitude of the antenna For a precise orbit to p
44. ble to connect the ACU to an Ethernet hub If you want to connect your computer and the ACU directly without using a hub you need a crossover cable for this with swapped RX TX lines pin signal description type 1 TX default Ethernet cabling 10Base T OUT 2 TX OUT 3 RX IN C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 8 61 SatService Gesellschaft f r Kommunikationssysteme mbH RX IN o NIJA CON2 Spare Inputs CON2 provides four opto isolated spare inputs for the ACU These inputs are reserved for customized versions of the ACU software they normally are not used There is no cabling required pin signal description type 1 AUXIINA IN 2 AUX1LINK IN 3 AUX2 INA IN 4 AUX2INK IN 5 AUX2INA IN 6 AUX2INK IN 7 AUX2INA IN 8 AUX2INK IN CONS 24V EXT Distribution CON3 provides eight clamps to the 24V EXT rail It has been included to simplify the external cabling pin signal description type 24V_EXT 24V_EXT 24V_EXT 24V_EXT 24V_EXT 24V_EXT 24V_EXT 24V_EXT DOIN DU P w N m CON4 Spare Outputs 5 8 CON4 provides four opto isolated spare outputs for the ACU These inputs are reserved for customized versions of the ACU software they normally are not used There is no cabling required
45. cond satellite it may be restored after the antenna returned to the old position To use this feature store the ACU settings to the target location 0 Target memory page This saves the tracking parameters and the tracking memory as well When this memory location is recalled later on the parameters and the memory contents are restored With this function you should keep in mind that the tracking memory contents becomes useless after about 24 hours 8 4 3 Adaptive Tracking Parameters The behaviour of the adaptive is adjustable with a couple of parameters First adaptive tracking also is a step track algorithm The parameters described in chapter 8 3 4 Steptrack Parameters therefore apply to the adaptive tracking as well The parameters concerning the adaptive tracking in particular are discussed in the table below All parameter described here are to be set at the Tracking page AZ Maximum model type These settings let you limit the adaptive model to a simpler one the ACU EL Maximum model type would choose by itself The maximum model type can be set individually for each axis Normally you will set both axes to LARGE which leaves the model selection fully to the ACU s internal selection algorithms In cases where the ACU seems to be too optimistic about the quality of the step track results the maximum model on one or both axes may be limited toa more simple and more noise resistant model Specially inclined orbit satel
46. d 8 OUT_EL_FWD elevation motor forward 9 OUT_EL_REV elevation motor reverse 10 OUT_EL_SPD1 elevation motor low speed 11 OUT_EL_SPD2 elevation motor hi speed 12 OUT_EL_RESET elevation motor driver reset 13 OUT_EL_ RESERVE reserved for extended motor control 14 OUT_AUX3 not used 15 OUT_AUX4 not used 16 OUT_POL_FWD polarization motor forward 17 OUT_POL_REV polarization motor reverse 18 OUT_POL_SPD1 polarization motor low speed C 2014 SatService GmbH wwWw satnms com ACU ODM UM 1411 Page 46 61 SatService Gesellschaft f r Kommunikationssysteme mbH 19 OUT_POL_SPD2 polarization motor hi speed 20 OUT_POL_RESET polarization motor driver reset 21 OUT_POL_RESERVE reserved for extended motor control 22 OUT_AUX5 not used 23 OUT_AUX6 not used 24 OUT_SUMMARY summary fault relay 1 OK 25 OUT_TRACKING tracking fault relay 1 OK 26 OUT_BCPR1 reserved for beacon receiver frequency select 27 OUT_BCPR2 reserved for beacon receiver frequency select 28 OUT_BCPR3 reserved for beacon receiver frequency select 29 OUT_BCPR4 reserved for beacon receiver frequency select 30 OUT_AUX7 not used 31 OUT_AUX8 not used The meaning of the FWD REV motor control outputs depend on the motor control mode set for this axis Bit definitions in tflt tracking faults The tflt value is returned as a 8 bit hexadecimal number The bit number 0 means the
47. e Password M Save User and Password Representation Type Binary Image C ASCII I Use passive mode 4 Login with username service and password service 5 Now you see on the right side the file system of the ACU like shown on the following picture On the left side you see the computers file system C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 21 61 SatService Gesellschaft f r Kommunikationssysteme mbH gt CHIPTOOL FTP Client aja Eile view Connection EBBOAB S an Drive C van Ciitest A HOME 4 Filename E DIRECTORY 30 05 2011 15 2 amp DIRECTORY 30 12 1899 00 0 IMAGES DIRECTORY 01 01 2006 00 0 ACUODM MIB 32756 20 05 2011 12 4 25 05 2011 15 4 HELP HTM 23092 01 01 2006 00 0 INDEX HTM 396 01 01 2006 00 0 info htm 617 20 05 2011 12 4 KEYS GIF 3752 01 01 2006 00 0 NAVBAR HTM 2547 01 01 2006 00 0 NAVBARBG GIF 268 01 01 2006 00 0 STOP GIF 347 01 01 2006 00 0 target txt 241 01 01 2006 00 0 target 0 txt 245 24 05 2011 14 0 target 1 txt 240 01 01 2006 00 0 target2 txt 214 25 05 2011 09 3 target28 txt 241 25 05 2011 09 4 target3 txt 214 25 05 2011 09 4 TB ERASE GIF 190 01 01 2006 00 0 TB GO GIF 70 01 01 2006 00 0 TB SATEL GIF 108 01 01 2006 00 0 TB SAVE GIF 143 01 01 2006 00 0 Connected to 192 168 2 77 6 Browse on the left side to the desired location to which you like to save the backup 7 Right clic
48. e step size is specified as a percentage of the antenna s half 3dB beamwidth The ACU calculates the beamwidth from the antenna diameter and the beacon frequency Expressing the step size in this relative way keeps the value in the same range regardless of the type of antenna The recommended value for this parameter is 15 20 You may want to start with 20 and try to reduce down to 15 if the signal degradation during tracking becomes too high The tracking step size is a common parameter for both axes If both axes behave differently you can tweak the antenna diameter settings in the setup Specifying a larger diameter makes the ACU using a smaller step size for this axis If the tracking step seems to be completely out of range you should check if the beacon frequency is set properly The frequency must be the true receive frequency at the antenna entered in MHz not an L band frequency or other IF Tracking mode The tracking mode parameter switches the steptrack on or off With the C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 54 61 SatService Gesellschaft f r Kommunikationssysteme mbH operation modes STEP and ADAPTIVE the ACU performs steptrack Level averaging When measuring the beacon level the ACU takes a number of samples and averages them The standard value of 5 samples normally should not be changed Larger values will slow down the ACU execution cycle Level threshold If the
49. eacon level values of all steps in the cycle the ACU calculates the peak position by aligning the approximated antenna pattern to the measured points v pairs of position beacon level values recorded during the Step track cycle the peak position P y evaluated by a least squares calculation antenna pattern approximated by a parabola This method minimizes the impact of noise and measurement errors to the evaluated peak position The benefit is that the size of depointing steps can be reduced to a very small value A tracking cycle consists of 2 4 tests steps With each step the antenna is moved a certain angle increment the beacon level is measured before and after the movement The angle increment is an adjustable value expressed as a percentage of the antenna s 3dB beamwidth A typical value is 15 of the half beamwidth C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 51 61 SatService Gesellschaft f r Kommunikationssysteme mbH START Do one step in direction A WORSE Po another step in direction A DONE Do a last step in direction A DONE y Do two steps in direction B WORSE Y DONE Do another step in direction B pa DONE Do a last step in direction B l DONE The diagram above shows the sequence of steps the tracking algorithm performs in one cycle on one axis It starts with a depointing step in one direction A If this
50. emory un ae iaa 57 C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 1 61 SatService Gesellschaft f r Kommunikationssysteme mbH 8 4 3 Adaptive Tracking Parameters sm ni serceto t isi a on nn nn on non none nen rn nennen a n esse ns 58 829 Program LrackIO CHERAERTETEFERTIENEFETRTEFENERETEFEFTERTETEFERTTSTEFETSTETENEFLTERTTITFTETETERTERTERFTSTETLVERTTEREFTERTETEFERTERTERRTEN 59 8 5 1 Practical US a ge ss sa nen er air Rn UNE Sook Sus NNN ook 59 8 52 File Form t an RAE 59 8 6 P ults and Tracking iia anna nalen alae 60 9 Specifications C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 2 61 SatService Gesellschaft f r Kommunikationssysteme mbH C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 3 61 SatService Gesellschaft f r Kommunikationssysteme mbH 1 Introduction The sat nms Antenna Control Unit is an antenna controller positioner with optional satellite tracking support It may be operated as a standalone unit or in conjunction of the sat nms ACU IDU a PC based indoor unit which offers extended tracking capabilities and a full featured visualization interface The sat nms ACU is available as e sat nms ACU ODM only the core module integrated in a compact case prepared for mounting on a 35mm DIN rail e sat nms ACU ODU complete antenna controller system for AC or DC Motors integrated in an outdoor cabinet that could be mounted directly to the antenna By mount
51. esis described below This lets you move the antenna the smallest possible step when you click to an arrow button For special applications however it might be helpful to set the step delta to a much greater value Position With this parameter you set the type of position sensor the ACU shall read for this axis sensor Principally the ACU is capableto read SSI RESOLVER and ANALOG type position type sensors The selected sensor type must match the type of interface board installed in your ACU It is not possible to switch from SSI to RESOLVER or vice versa without changing the interface module When selecting a SSI type position encoder also the number of bits and the encoding scheme must be selected For the position sensor type parameter these values are combined to one name E g SSI 13G means 13 bit Graycode SSI sensor SSI 24B means 24 bit binary encoded SSI sensor Beside the SSI xxX RESOLVER and ANALOG selections this parameter offers the choice NONE which tells the ACU not to read a position encoder at all With this selection you can tellthe ACU if the polarization is not to be controlled by the ACU If you are using multiturn SSI encoders you will have to scale the reading See Calibration scale below Pre scale The pre scale calibration offset is added to the raw position encoder reading before scaling is offset applied The pre scale offset is defined as an 8 digit hexadecimal value in normalized position encoder
52. ffset PO Pointing hysteresis PO Low speed threshold PO Upper limit Beacon RX IP address Beacon RX O level Antenna longitude Antenna latitude Antenna abs altitude Inclinometer type Roll offset SNMP system name SNMP system location SNMP system contact MIB File SNMP trap IP 2 SNMP trap IP 4 Admin password 2011 05 16 12 30 56 ERM 0 020 DIR START 4000 msec 180 000 0 025 20 Default SatService GmbH ACUODM MIB 192 168 2 14 9 0 0 0 RRRRAR SatService Gesellschaft f r Kommunikationssysteme mbH The antenna may be moved by means of the optional handheld controller The Handheld function is not yet available at ACU RMU and ACU19 Version Startup Set parameter RS485 address on the ACUs Setup page to TERM This enables communication between the ACU and the sat nms handheld Connect the Handheld with the provided cable Handheld 9pol DSUB Power supply ACU Cabinet 15pol DSUB After connecting the Handheld push the Redraw button once The start up screen that shows the installed software version is displayed for a few seconds After that the menu for controlling the antenna is displayed automatically Operation C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 35 61 SatService Gesellschaft f r Kommunikationssysteme mbH Fi START STOP RESET REDRAW POL STEP POL CCW SIZE cw de csi gt y sat nms ACU
53. get MeMory A A chest 25 5 4 Tracking Parameters cornada dida 26 DD Test A neh E AN E E 29 A TN 30 3 1 Handheld Terminal timado aan 35 6 Frontpanel operation nee nenne lebe so Rip een 37 7 Remote Control ei eke heh WAAR nl BR I 37 7 1 General command syntax 222 28 el eben babu ead tk case GU a lIn a 38 1 2 The TCP IP remote control interface nee bedetoeg hee ccd i tina dona dodo sedecousstedeess deduces ins 38 7 3 The RS232 remote control interface oooococononononononononononononononononononononononononononononononenononeninenenos 39 7A Parameter listillo 39 7 3 Ode line read via TOPP a unerkannt ende 47 8 Theory of Operation ti eee bo a eilig 49 Sl Angles Measurement aaae E E EE a OE A E E klauen O OEE Shaun 49 8 2 Pointing Motor Control misil 222 a aa eat a da a ln 50 SiS SE Prack oea Aa O NO 51 8 3 1 The sat nms Steptrack Algorithm ooococccncncnnnnnnnnnnnnnnnonnnnnnnnnnnnnnnnnnnnnnnnnnnnnonnnnnnnonnnnnnnnnnnnnnnos 51 8 3 2 ACU and Beacon Receiver cet ena aus ee aa aO ae A EE R a EE aeaa iiaiai 52 SID Smoothing view eed eh eee ee E A a eh A EES 53 8 3 4 Steptrack Parameters AN edesin bods ood seie ee e ine eiee Trie eani 53 8 4 Adaptive Tracking a eriet treema 140 Suoasspehfnasshenn Sesarengdesn lb une as apehrent hatt lasdeveusscateuedscbebeosestuendaseee 55 8 4 1 The sat nms Adaptive Tracking Algorithm 00ooooonononononononononononononononononononononononono nono no nonnnnnnnnnos 55 3 42 The Tracking M
54. he encoders so external power supplies may be omitted in most cases RESOLVER Many existing antennas are equipped with resolvers The resolver interface module permits to re use these ready mounted and cabled sensors when an old antenna controller is to be replaced by a sat nms ACU The resolver interface board is optimized for the use with 2V type resolvers which are very common The interface board drives the resolver with 4Veff 2000Hz and expects 2Veff at the sin cos inputs The resolver interface has 16 bit binary resolution ANALOG For small antennas with reduced accuracy requirements using analog angle to voltage sensors in fact precision potentiometers is an inexpensive alternative The analog sensor interface board may be set up for several voltages to connect to the commonly used sensor types The analog interface board uses a 16 bit precision ADC with a temperature compensated voltage reference Angle calibration Analogous to the modular position interface hardware concept the ACU software uses configurable drivers to read the different types of position interfaces From the user s point of view the ACU accepts and displays pointing angles as floating point numbers with 0 001 resolution Internally the software treats angles as 32 bit integer numbers where the full 32 bit range corresponds to 360 This is equivalent to a resolution of 0 000000084 When the software calculates the pointing angles from the
55. if you do this approximately later on you need to type in here the exact values 3 Check the rotational direction of the resolvers If possible do this by turning the resolver axis directly otherwise you have to move the antenna by hand Maybe you have to invert the rotational direction on the setup page 4 Set the offset of the angle detectors to the desired values by using the calc function If you need more detailed information please refer to chapter 5 6 Setup 4 3 4 Motors Before you connect the motors to the sat nms ACU ODM take care that the motor drivers are not powered up yet 1 Connect the motor drivers to the sat nms ACU ODM as described in chapter 4 2 2 2 Press the STOP button on the sat nms ACU ODMs website By this you can be sure that no motor movement will occur by switching on the motor drivers 3 Turn on power supply for the motor drivers they have to run now 4 If you use frequency inverters as motor drivers set now the motor parameters to the frequency inverters as written in their documentation 5 Check the motor rotating directions if necessary change it by interchanging 2 phase wires of the motor cable 3phase motor or interchange and cable DC motor 6 Drive the antenna in every direction AZ EL and if available POL until the limit switches stop the motor movement to ensure that the limit switches work well ATTENTION While doing this test it is absolutely necessary to be very mindful to check
56. iguration many frequency inverters use In DUAL START mode the FWD signal switches the motor on in forward direction REV activates the motor in reverse direction This configuration mode is convenient to control a motor with relays The movement direction for the azimuth drive must be cabled as follows FWD moves the antenna to the west to the right on the northern hemisphere The evaluation routines in the software which compute the antenna pointing for a given satellite location require the movement direction in this way The EL RESERV reflects the motor stopped state of the axis ON signals the OK state the signal turns off in case of a motor fault timeout or if the emergency stop signal is received Depending on the reason of the motor stop a motor reset command may be neccessary to release the axis from this state pin signal DUAL START DIR START type 1 EL FWD E ON motor on right ON motor on OUT 2 EL FWD C OFF motor off OUT 3 EL REV E ON motor on left ON direction left OUT 4 ELREVC OFF direction right OUT 5 EL SPD1 E ON slow ON slow OUT 6 ELSPD1C OUT 7 ELSPD2E ON fast ON fast OUT 8 EL SPD2 C OUT 9 EL RES E reset driver reset driver OUT 10 ELRES C OUT 11 EL RESERV E axis stopped axis stopped OUT 12 EL RESERV C OUT 13 EL FAULT K driver fault driver fault IN 14 ELFAULTA IN CON14 GND EXT
57. iliary output 7 LO EL motor fault HI Auxiliary output Lo Auxiliary output 8 HI Cabinet door open HI Flags Analog AZ moving LO Temperature S00 SG EL moving LO Beacon level 82 53 dBm POL moving LO Nick 81 2 Roll 90 0 AZ motor timeout LO AZ raw pointing 1D1A0000 EL motor timeout LO EL raw pointing 84660000 POL motor timeout LO POL raw pointing E3840000 AZ coefficients EL coefficients 5 6 Setup 2 19094E 02 1 21731E 02 2 26467E 02 2 75028E 01 4 54165E 02 2 37250E 02 The page Setup contains the ACU s installation parameters The page displays a table with the parameters actually set Each parameter value is a hyper link to a separate page which lets you change this parameter This parameter change page shows the actual parameter setting either in an entry field or in a drop down box You may change the parameter to the desired value and then click to the Submit button to pass the changed value to the ACU ODM The ACU automatically returns to the setup page when the parameter has been changed To cancel a parameter modification you already started either use the Back button of you web browser or click to the Setup button on navigation bar Both returns to the setup page without changing the parameter you edited The table below lists the settings provided by this page General This section of the setup page contains some general setup parameters Parameter Name Description Axes control mode The
58. ing 202 266 32 960 25 000 b 2 Numeric orbit position 5 4 Tracking Parameters sat nms ACUs with the tracking function installed give access to the tracking mode and the fine tune parameter which lets you adapt the tracking to the individual requirements of the antenna and the satellite you are tracking to ACUs without tracking function show an empty page at this place Tracking mode The tracking mode parameter selects the tracking method the ACU actually uses Possible selection are OFF No tracking is performed STEP Step track mode In regular intervals the antenna performs small search steps to optimize the pointing Chapter 8 3 0 Step Track gives more information about this mode ADAPTIVE The adaptive tracking mode works the same way as step track but it additionally is capable to predict the satellite s position when the beacon reception fails It computes mathematical models of the satellites motion from the step track results recorded over a certain time Details about this tracking mode are given in chapter 8 4 0 Adaptive Tracking PROGRAM The program tracking mode is different from the modes above The ACU moves the antenna along a path which is described in a data file No beacon reception is required for this You have to create such a data file and copy it with FTP to the ACU before you can use this mode SatService GmbH provides a PC software which lets you easily create data files for program track from
59. ing environment Ji Info After a mouse click to this button the ACU outdoor module shows a table with information like the serial number of the device or the revision ID and compilation date of the software Help Clicking to this button shows the on line version of this user manual Step Move Clicking to the buttons in this area moves the antenna a small step to the indicated direction For azimuth and elevation small step and large step buttons are provided A small step is the angle defined with the XX step delta parameters at the Setup page a large step is ten times this value With the polarization axis steps always are 1 STOP Clicking to the STOP button immediately stops all motors The ACU indicates a fault A click to the RESET button releases this fault RESET The RESET button lets the ACU acknowledge any motor diver faults by activating the reset circuit to the motor drivers for 800 msec All faults internally latched by the ACU are cleared and the target pointing values are set to the values actually read from the position sensors 5 2 Antenna Pointing C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 23 61 SatService Gesellschaft f r Kommunikationssysteme mbH The Pointing page is the main page of the ACU user interface which shows the actual antenna pointing and some status information The Pointing page automatically refreshes once a second The refresh rate may be
60. ing a sat nms LBRX beacon receiver into this cabinet you have a complete antenna tracking system in a compact cabinet directly at your antenna e sat nms ACU RMU complete antenna controller system for AC Motors integrated in a 6RU 19inch rack mount case for indoor use e sat nms ACU19 complete antenna controller system for DC Motors integrated in a 1RU 19inch rack mount case for indoor use For detailed description please refer to the sat nms documentation CD or www satnms com doc Main benefits of the sat nms ACU are e The ACU outdoor unit is able to act as a standalone antenna control and tracking system without an indoor unit required e The ACU provides an Ethernet interface using the TCP IP and HTTP Internet protocols It can be controlled using any PC providing an Ethernet interface and a web browser like the Microsoft Internet Explorer The ACU runs a web server which acts as a user interface to the antenna controller e The ACU is prepared to read the receive level of a sat nms beacon receiver through the TCP IP interface e The flexible interface design of the ACU enables it to control most types of motor driving antennas for geostationary satellites Supported motor controllers are configurable in the field e Power relays This simple solution is suitable for antennas using 2 speed AC motors e Frequency inverters Speed and acceleration ramps are programmed into the inverter module with this solution e Servo controller
61. inting Motor Control describes the way the ACU performs the antenna pointing and how it controls the motors Chapter 8 3 Steptrack describes the step track method used by sat nms ACUs providing this function Chapter 8 4 Adaptive Tracking describes the adaptive orbit prediction tracking method used by sat nms ACUs providing this function Chapter 8 5 Program Tracking describes the program file tracking capability built into the sat nms ACU 8 1 Angle Measurement The sat nms ACU provides exchangeable interfaces for several types of position sensors Position sensor interfaces may be selected individually for each axis This gives a maximum of flexibility for application where the sat nms ACU replaces an existing antenna controller Position sensor types Actually there are three types of position sensor interfaces available for the ACU The interfaces principally are field replaceable however changing interface boards inside the ACU should be done by skilled personnel only ESD protection must be followed when handling the ACU boards The ACU is capable to interface to the following types of positional sensors SSI SSI type digital position encoders are the first choice for antennas which are setup from scratch They are precise reliable and provide a standardized interface The ACU supports types from 13 to 24 bit resolution both gray coded and binary variants The ACU provides 5V and 24V supply voltages 200mA max for t
62. ion encoders e analog voltage based sensors You have to decide at date of order which interfaces you need The sat nms ACU ODM is powered by 2 different power supplies e 24V ACU for ACU internal use especially for the core processor e 24V EXT for external signals e g limit switches drive signals etc By this a maximal reliability of the sat nms ACU ODM is ensured C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 7 61 SatService Gesellschaft f r Kommunikationssysteme mbH 4 Installation The following chapter describes how to install the ACU ODM mechanically and electrically Additional a detailed start up procedure is given in this chapter 4 1 Mechanical installation The ACU enclosure is DIN rail mountable Hence simply snap the module on to the rail to fix it For plain wall mount fix a 450 mm piece of DIN rail at the wall with at least four screws and lock the ACU on this 4 2 Interfaces to the Antenna Pin descriptions ATTENTION Electrical installation shall be carried out only by qualified personnel who are instructed and aware of hazards of electrical shocks The sat nms ACU provides a lot of input output signals They all are described in the following chapters Many applications do not require all ports of the ACU to be cabled For a minimum antenna control functionality however you should connect the following to the ACU A computer via Ethernet so you can configure the ACU through it s Web in
63. ionssysteme mbH Watchdog The AUX 8 output may be configured to act as a heartbeat output If enabled the output pulse on switches every 1000 ms between on off If using this signal for an external watchdog circuit AUX8 be aware that in adaptive tracking mode delays of some seconds are possible while the acu calculates the orbital model Display With this parameter you select the refresh rate of the ACU s main window This parameter is refresh available from software version 2 1 007 or higher Note The ACU s pointing page by default shows the title Antenna pointing By entering a different text here you can make the ACU show a customized title Azimuth Elevation Polarization The Azimuth Elevation Polarization sections contains the parameters which are specific to the individual axis They are the same for each axis Parameter Description Name Antenna Set this parameter to the dish diameter Units with the tracking function installed use this diameter value to estimate some tracking parameters With offset antennas the diameter settings are different for the azimuth elevation axes This lets the ACU calculate suitable tracking step sizes individually for each axis Step delta This parameter defines size of a step the antenna moves when you click to the arrow buttons on the ACU main page If you are using the arrow buttons to fine tune the antenna pointing manually the best value is the pointing hyster
64. jitter threshold If the jitter value of at least one axis exceeds this threshold the ACU raises an model fault If this happens three consecutive times the ACU resets the models of both axes Adaptive tracking will be possible not until 6 hours after this happens During adaptive tracking the ACU evaluates for each axis a figure called jitter The jitter value describes standard deviation of the measured peak positions with respect to the positions calculated from the currently selected model The figure is also expressed as a percentage of the antenna s beamwidth low values indicate that the model ideally describes the antenna s path High values indicate that s something wrong The step track results may be to noisy at low amplitudes or the model does not fit at all This may be the case if a satellite gets repositioned in the orbit A typical threshold value is 20 this will detect very early that a model does not fit to describe the satellite s motion If this value causes false alarms too often you may want to raise the threshold to 50 Setting it to 0 switches the threshold monitoring completely off 8 5 Program Tracking Program tracking is a tracking method which lets the antenna follow a path which usually has been calculated by an extern software This software produces a list of time stamp antenna pointing records The list is copied to the ACU and the ACU is switched to PROGRAM track mode The ACU now moves the
65. k the app dat file and choose copy in the drop down list The file will immediately be copied to the location shown on the left side If you have saved targets you might backup them in the same way They are named targetXX txt XX represents the number of the target 8 To copy a backup file to the ACU browse on the left side if the window to the desired app dat file and copy this file to the ACU in the same way right click gt copy 9 After copying an app dat file to the ACU you have to reboot the unit power off By next starting up the new app dat file will be used C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 22 61 SatService Gesellschaft f r Kommunikationssysteme mbH 5 Operation The sat nms ACU outdoor module is designed to be controlled over a network link using a standard web browser This means in practice that the user interface to the ACU appears in your browser window after you type in the ACU s IP address in the address field of the browser program Operating the ACU is mostly self explanatory 5 1 The Web based User Interface After having connected the ACU to a power supply and set the ACU s IP address you can access the ACU s user interface To do this start your favorite web browser program Internet Explorer Netscape Navigator Opera or what else program you prefer At the address field where you normally enter the URL of a web page you want to see type in the IP address of the sat nms A
66. kationssysteme mbH name range unit description aabw r o Q AZ antenna 3dB beamwidth aalt 0 8000 m Antenna abs altitude aamp r o AZ Amplitude acal 360 000 360 000 2 AZ Calibration offset aclc 2 Calculate offset from Az value acoe r o see below AZ model coefficients acou 180 000 180 000 5 Antenna course addr ABCDEFGNONE RS485 address ahys 0 000 2 000 2 AZ Pointing hysteresis ainv NORMAL INVERTED AZ Sense invert ajtr r o AZ Peaking jitter alat 0 000 90 000 N Antenna latitude alon 180 000 180 000 E Antenna longitude amax 180 000 360 000 j AZ Upper limit amdt r o character string AZ Model type amin 0 000 180 000 2 AZ Lower limit ammx SMALL MEDIUM LARGE AZ Maximum model type amnt AZ OVER EL POLAR Antenna mount type amot DUAL START DIR START NONE AZ Motor driver type apos r o 180 000 180 000 2 AZ Pointing araw r o 00000000 FFFFFFFF AZ raw pointing asca 0 000000 100000 000000 AZ Calibration scale asen SSI 13B SSI 13G SSI 17B SSI 17G SSI 18B SSI 18G SSI 19B AZ Position SSI 19G SSI 20B SSI 20G SSI 24B SSI 24G RESOLVER sensor type VOLTAGE NONE C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 40 61 SatService Gesellschaft f r Kommunikationssysteme mbH
67. l Note 3 7m Antenna Display refresh 1sec Axes control mode PARALLEL Azimuth AZ Antenna diameter 37m AZ Position sensor type RESOLVER AZ Sense invert NORMAL AZ Pre scale offset FESCE38F calc AZ Calibration scale 0 000000 AZ Lower limit 148 000 Elevation EL Antenna diameter 37m EL Position sensor type RESOLVER EL Sense invert INVERTED EL Pre scale offset AF29E38F calc EL Calibration scale 0 000000 EL Lower limit 8 000 Polarization PO Position sensor type RESOLVER PO Sense invert NORMAL PO Pre scale offset 00000000 calc PO Calibration scale 0 000000 PO Lower limit 50 000 Beacon Receiver Beacon RX type SATNMS Beacon RX voltage scale n a Beacon RX frequency 11450 529 MHz Location GPS receiver type NONE Antenna course 180 000 Orientation Compass type NONE Nick offset n a SHMP Control SNMP read community public SNMP write community private SNMP trap community public SNMP traps ENABLED SNMP trap IP 1 192 168 218 SNMP trap IP 3 0 0 0 0 Access Control User password s Setup Page Example 5 7 Handheld Terminal Date time RS485 address Az step delta AZ Motor driver type AZ Motor timeout AZ Post scale offset AZ Pointing hysteresis AZ Low speed threshold AZ Upper limit El step delta EL Motor driver type EL Motor timeout EL Post scale offset EL Pointing hysteresis EL Low speed threshold EL Upper limit PO Motor driver type PO Motor timeout PO Post scale o
68. lites which are located close to the longitude of the antenna s geodetic location may require this limitation for the azimuth axis With such a satellite the elevation may move several degrees while the azimuth shows almost no motion Level threshold If the beacon level falls below this threshold value the ACU does not perform a step track cycle If the level falls below the threshold during the steptrack cycle the cycle gets aborted If the ADAPTIVE tracking is enabled and there is enough data in the tracking memory the ACU computes a mathematical model from the stored data and predicts the antenna pointing position from the extrapolation of the model If the tracking mode is set to STEP the ACU leaves the antenna where it is if the beacon level drops below the limit Adjusting the threshold level that adaptive tracking is switched as expected must be done carefully and may require some iterations specially if the beacon is received with a low C N A good starting value for the threshold is 10 dB below the nominal receive level or 2 dB above the noise floor the beacon receiver sees with a depointed antenna whatever value is higher To turn off the monitoring of the beacon level this in fact inhibits the adaptive tracking simply set the threshold the a very low value e g 99 dBm C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 58 61 SatService Gesellschaft f r Kommunikationssysteme mbH Peak
69. mplitude of the double frequency sine simply is near zero in such a case Finally the LARGE model adds a linear movement to the components of the MEDIUM model This is required to track significantly inclined satellites over a period of several days Such satellites tend to drift in their position the linear movement component can compensate this effect for a couple of days The LARGE model is the most demanding one concerning the step track data it is based on Model selection The ACU normally by itself selects the adaptive tracking model for each axis individually The decision which model will be used in case of a beacon drop out is made based on the amount and quality of the data in the tracking memory The quality of the recorded data mainly depends on the amplitude of the antenna movement If the satellite moves only a small amount in 24 hours the uncertainty of the step track peaks is quite high compared to this amplitude The ACU compares the movement amplitude to the antenna s half 3dB beam width to evaluate this measure The ACU presents this figure as a percentage value amplitude wo o 1 204 6 12 18 24 30 36 42 48 hours memory depth The ACU selects the adaptive tracking model following a scheme as illustrated in the diagram above Below 6 hours data in the tracking memory there is no adaptive tracking possible at all With at least 6 hours of data and 18 valid samples the ACU uses the SMALL model If the movement am
70. n signal description type 1 24V EXT 2 24V EXT 3 24V EXT 4 24V EXT CON12 GND EXT Distribution CON12 provides four clamps to the GND EXT rail It has been included to simplify the external cabling pin signal description type 1 GND EXT 2 GND EXT 3 GND EXT 4 GND EXT CON13 Elevation Motor Driver All signals for motor control are provided as free floating opto coupler inputs outputs This gives a maximum of flexibility to adapt the cabling to the motor driver units They probably will combine one end of the control inputs to a common potential The ACU is capable to control motor drivers with different polarity concepts E 24 EXT B Example for wiring the motor drive i signals _ Pin 2 4 6 8 10 12 i m i i y gt CON10 13 15 i Pin 13 5 7 9 11 F N GND EXT E H 1 Pin 13 QUT Example for wiring the motor status j a y signals E Y CON10 13 15 zei E i 1 pace I i 24V EXT i I GNO EXT C 2014 SatService GmbH wwWw satnms com ACU ODM UM 1411 Page 13 61 SatService Gesellschaft f r Kommunikationssysteme mbH The ACU knows two different configuration modes to control a motor driver They are called DIR START and DUAL START In DIR START mode the FWD signal switches the motor on off the REV signal controls the motor direction This is the conf
71. n frequency you must enter the frequency received by the antenna MHz not the IF frequency seen by the receiver is used by the ACU to calculate the antenna s beamwidth and an approximated beam pattern With the sat nms LBRX beacon receiver the ACU automatically reads the frequency from the receiver Tracking cycle time The cycle time specifies how often the ACU shall perform a step track cycle The value is to be entered in seconds In fact the parameter does not specify a cycle time but the sleep time between two tracking cycles This means the true cycle time is the time the ACU needs to perform one step track cycle plus the time entered here 300 seconds 5 minutes is a good starting value for this parameter Inclined orbit satellites probably will require a shorter cycle time very stable satellites can be perfectly tracked with one step track cycle every 15 minutes 900 seconds Tracking step size The tracking step size is a very important parameter for the performance of the tracking It defines the size of every depointing step the ACU makes in order to find out where the optimal antenna pointing is Setting too high values will cause significant signal degradations during the step track cycle because the antenna moves a too large amount away from the satellite Setting the value too small will let the beacon level jitter mask the level differences caused by the test steps the antenna will not track the satellite properly Th
72. ncy Expressing the step size in this relative way keeps the value in the same range regardless of the type of antenna The recommended value for this parameter is 15 20 You may want to start with 20 and try to reduce down to 15 if the signal degradation during tracking becomes too high The tracking step size is a common parameter for both axes If both axes behave differently you can tweak the antenna diameter settings in the setup Specifying a larger diameter makes the ACU using a smaller step size for this axis If the tracking step seems to be completely out of range you should check if the beacon frequency is set properly The frequency must be the true receive frequency at the antenna entered in MHz not an L band frequency or other IF Tracking cycle time The cycle time specifies how often the ACU shall perform a step track cycle The value is to be entered in seconds In fact the parameter does not specify a cycle time but the sleep time between two tracking cycles This means the true cycle time is the time the ACU needs to perform one step track cycle plus the time entered here 300 seconds 5 minutes is a good starting value for this parameter Inclined orbit satellites probably will require a shorter cycle time very stable satellites can be perfectly tracked with one step track cycle every 15 minutes 900 seconds The maximum cycle time accepted by the ACU is 1638 seconds Measurement delay During a steptrack cycle
73. ne entry describing the actual network parameters of the sat nms ACU ODM 2 ECHIPTOOL 151 x Eile Flash CHIP Tools Info Scan for IPC CHIPs atthe network Men Nome CL COMA CUT Gateway Frans 0 fra fite 004DE3 ACU No 192 168 288 255 255 255 0 192 168 2 254 C13 003056904DE3 20 ETH OOSFSE O_FEP No 192 168 2 70 255 255 255 0 192 168 2254 5SC13 003056805F9E 2 0 ETH x 012490 BENRX No 192 168 2 72 255 255 255 0 192 168 2 254 l Collect Mode Help amp Cont Halted Sorted by Snr Open popup menu with right mouseclick at table rows 5 The serial number of the core module shown in the first column of the list If the list stays empty the ACU is not connected properly If there are more entries in the list the configuration program has found other devices in this network segment which use the same technology 6 Now open with a right click the sub menu IP configuration to open the IP configuration window of the program In this form the ACU s MAC address is shown on top below you find the fields to configure the new IP address and network mask If the ACU later shall be operated through a router enter the address of the router on the gateway field otherwise leave this field blank Be sure that the DHCP mark is unchecked the other values have to be set as shown on the picture Finally click to the Yes button to set the new parameters at the ACU C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 19 61
74. ns helps to find the best parameter settings for a given application e Specifications At the end of the document the specifications applicable to the sat nms ACU are summarized in this chapter Support and Assistance If you need any assistance regarding our ACU don t hesitate to contact us We would be pleased to help you by answering your questions SatService GmbH phone 49 7738 9700 3 or 4 Hardstrasse 9 fax 49 7738 97005 78256 Steisslingen www satnms com Germany satnms support satservicegmbh de Version 4 3 2012 11 08 C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 5 61 SatService Gesellschaft f r Kommunikationssysteme mbH 2 Safety Instructions Safety The mains shall only be connected provided with a protective earth wire Any interruption of the protective wire inside or outside the sat nms ACU is likely to make the unit dangerous Intentional interruption is prohibited The unit described in this manual is designed to be used by properly trained personnel only Adjustment maintenance and repair of the exposed equipment shall be carried out only by qualified personnel who are aware of hazards involved Refer servicing to qualified personnel To prevent electrical shock do not remove covers For the correct and safe use of the instrument it is essential that both operating and servicing personnel follow generally accepted safety procedures in addition to the safety precau
75. ntenna s beamwidth low values indicate that the model ideally describes the antenna s path High values indicate that s something wrong The step track results may be to noisy at low amplitudes or the model does not fit at all This may be the case if a satellite gets repositioned in the orbit You may set a threshold value for the jitter The ACU raises a fault if at least one axis exceeds the threshold value If this happens three consecutive times the models gets reset all data in the tracking memory gets marked invalid 8 4 2 The Tracking Memory In the tracking memory the ACU records all steptrack peak positions The tracking memory is used as a data source for the adaptive tracking and for the smoothing function as well Each record contains a time stamp the azimuth elevation values and the beacon level measured after the peaking The tracking memory has a fixed size 1000 entries Once 1000 records are stored the memory works in a first in first out manner How many days of tracking data fits into the memory depends on the tracking interval The diagram below shows the memory depth vs the tracking interval Tracking memory depth days a 1 1 1 1 1 1 1 B 2 4 6 8 18 12 14 Tracking interval minutes The tracking memory is volatile it is erased when the ACU gets reset or switched off Saving the tracking memory in regular intervals to the ACU s flash memory would damage the flash memory quite quickly Memory reset
76. ointing calculation this value latitude should be entered with 0 001 accuracy Antenna The absolute altitude over sea of the antenna location abs altitude Orientation Parameter Name Description Compass type Applicable only for car mobile variants of the ACU Inclinometer type Applicable only for car mobile variants of the ACU Nick offset Applicable only for car mobile variants of the ACU Roll offset Applicable only for car mobile variants of the ACU C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 33 61 SatService Gesellschaft f r Kommunikationssysteme mbH SNMP Control From Software version 2 1 007 or higher the sat nms ACU contains an SNMP agent listening at UDP port 161 The SNMP agent provides a common subset of the MIB II system interface parameters and gives full access to the remote control capabilities of the sat nms ACU with a number of MIB objects placed in the private enterprises tree The actual MIB file defining the ACU s private MIB may be downloaded from the ACU itself by FTP user service password service The file ACUODM MIB contains all necessary information Parameter Description Name SNMP Sets the SNMP community string expected for read access The default is public read community SNMP Sets the SNMP community string expected for write access The default is public write community S
77. ol application either through the TCP IP interface or through a serial RS232 interface RS232 not yet implemented in ACU19 and ACU RMU Both communication methods use the same commands and parameters However there are different frames around each message depending communication method used Controlling the device from the web interface the TCP IP remote control interface or via the serial interface is completely equal commands may sent to any interface at any time the ACU will use the parameter it receives last 7 1 General command syntax The ACU knows a number of parameters each identified by a parameter name To set a certain parameter to a new value a message name value has to be sent to the ACU The ACU interprets this command checks the range of value sets the internal parameter and then answers name value The value in the reply is the value actually recognized by the ACU For instance if the requested value was out of range the replied and internally used value is limited to the applicable minimum or maximum To read a parameter from the ACU instead of a new parameter value a question mark is sent name The ACU replies the actual value in a complete message name value A complete list of the parameter the ACU knows is shown later in this document in chapter Parameter list Below some common rules applying to the remote control message syntax are summarized e Parameter names always are of lower case letter
78. on pcal 360 000 360 000 g PO Calibration offset pelc gt Calculate offset from Pol value pent 0 65535 Peak count phys 0 000 10 000 2 PO Pointing hysteresis pinv NORMAL INVERTED PO Sense invert pmax 0 000 180 000 2 PO Upper limit pmin 180 000 0 000 S PO Lower limit pmot DUAL START DIR START NONE PO Motor driver type ppos r o 90 000 90 000 j PO Pointing praw r o 00000000 FFFFFFFF PO raw pointing psca 0 000000 100000 000000 PO Calibration scale psen SSI 13B SSI 13G SSI 17B SSI 17G SSI 18B SSI 18G SSI 19B PO Position SSI 19G SSI 20B SSI 20G SSI 24B SSI 24G RESOLVER sensor type VOLTAGE NONE psth 0 0 10 0 2 PO Low speed threshold pstp 0 000 90 000 PO Step delta ptar 90 000 90 000 2 Pol target value ptot 0 32000 msec PO Motor timeout pwda character string E Admin password pwdu character string User password C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 43 61 SatService Gesellschaft f r Kommunikationssysteme mbH roll r o 90 0 90 0 2 Roll angle rolo 90 0 90 0 2 Roll offset save 0 99 Save target scnt r o 0 65535 Save count slee r o 0 65535 sec Sleep time up to the next tracking action smth 0 6 h Smoothing interval smo r o character string Device serial no step command Step move 5 stim charac
79. ontrol is not usable This interface may be configured to work as a RS232 or RS422 interface by jumpers inside the ACU pin signal description type 1 RS232 0 TX RS232 for GPS receiver OUT 2 RS232 0 RX IN 3 GND 4 RS232 1 TX RS232 for remote control OUT 5 RS232 1 RX IN 6 GND 7 RS422 TX RS422 for remote control OUT 8 RS422 TX OUT 9 RS422 RX IN 10 RS422 RX IN The ACU is factory preset to use the RS422 interface in 4 wire configuration To change the interface configuration set the jumpers on the ACU main board above CON8 according to the illustration below e JP1 selects between the RS232 and the RS422 interface driver Put the jumper to position 1 2 left to select the RS232 interface e JP2 switches between the RS422 4 wire mode and RS485 2 wire mode To select RS485 2 wire mode put the jumper to position 1 2 left Use the TX data lines CON8 Pins 7 8 in this mode e JP4 and JP5 activate 100 Ohms termination resistors between the RS422 data lines The lines are terminated if the jumper is set CONS Power Supply At CONS the power supply for the ACU itself pins 1 2 and for the external switches must be connected Also see chapter 4 2 3 Power Supply Cabling for the concept of separate intern extern power supplies the ACU uses pin signal description type 1 24V ACU power supply for the ACU and the 2 GND ACU posi
80. or the request is http 10 0 0 1 point fmt txt The fmt txt parameter forces the power sensor to reply a one line text document rather than the HTML coded page which is normally displayed by the web browser The ACU answers a text plain type document which consists of one line As shown in the example below the line consists of a set of keyword value pairs separated by amp characters Within each pair keyword and value are separated by the character apos 174 688 amp epos 31 456 amp ppos 34 5 amp atar 174 700 amp etar 31 500 amp ptar 34 5 amp blev 64 33 amp temp 63 5 amp o0bit FFFF0000 amp ibit FFFF0000 amp The format does not use fixed column widths for the values however the precision of floating point values is always as shown in the example An application which parses this string should not rely on the order of the values in the line Future version of the ACU may provide additional values which not necessarily will appear at the end of the line A description of the parameters is given in the chapter Parameter list above C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 48 61 SatService Gesellschaft f r Kommunikationssysteme mbH 8 Theory of Operation This section gives some background information about how the ACU works Chapter 8 1 Angle Measurement describes how the ACU measures the antenna pointing and how it calculates the angles displayed at the user interface Chapter 8 2 Po
81. ough an Ethernet cable Usually an Ethernet hub is used to connect the ACU the LBRX and the C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 52 61 SatService Gesellschaft f r Kommunikationssysteme mbH controlling computer With a sat nms LBRX beacon receiver some additional features are available for the tracking e The beacon receiver sends the actual level as UDP packets over the LAN The ACU ODM receives this value without any accuracy degrading due to cascaded digital to analog analog to digital conversions e The ACU reads the beacon frequency from the LBRX at the start of each tracking cycle The value read from the receiver overwrites the value set by the operator and is used to calculate the antenna s beamwidth e The ACU informs the sat nms LBRX when a tracking cycle starts and when it ends The LBRX suspends any background activities like noise reference measurements or frequency tracking This ensures that the beacon receiver recognizes level differences without a delay during the tracking cycle For a well functioning step track with a third party receiver it is important to adjust the voltage level range to the scale and offset provided by the beacon receiver If at the beacon receiver these values may be adjusted too a preferable scale is 0 5V dB for 20dB usable range The offset should be adjusted that the receive level at clear sky conditions leave a headroom of 3dB at the top end of the range The analog
82. plitude is above 30 and there are at least 12 hours with 36 valid samples of data available the ACU uses the MEDIUM model The LARGE model requires 48 hours of data with 144 valid samples and an amplitude value of 30 Beside the recorded hours of steptrack the ACU also watches the number of samples With a tracking interval of more than 15 minutes the required times may be longer than shown in the diagram C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 56 61 SatService Gesellschaft f r Kommunikationssysteme mbH The ACU provides a max model parameter for each axis You may limit the model size to a smaller one than the ACU would choose by itself The other way round it is not possible to force the ACU to use a model it has not enough data for If the tracking results are bad the ACU will not be able to calculate a model and set the model to NONE This occurs also if only one axis have bad tracking results Quality information As mentioned above the amplitude of the satellite s movement is used as a measure of the step track quality This is because the step track measurement uncertainty is an constant angle which primarily depends on the antenna size Beside the amplitude the ACU evaluates for each axis a figure called jitter The jitter value describes standard deviation of the measured peak positions with respect to the positions calculated from the model The figure is also expressed as a percentage of the a
83. r larger values e Elevation Larger values mean higher elevation e Polarization The feed turns clockwise when looking through the antenna to the satellite for increasing values When operated on the southern hemisphere the polarization sense must be set the other way round Motor The ACU knows two different configuration modes to control a motor driver They are driver type called DIR START and DUAL START In DIR START mode the FWD signal switches the motor on off the REV signal controls the motor direction This is the configuration many frequency inverters use In DUAL START mode the FWD signal switches the motor on in forward direction REV activates the motor in reverse direction This configuration mode is convenient to control a motor with relays Beside the modes DIR START and DUAL START you may set the motor driver type to NONE which prevents the ACU from controlling the motor at all Low The ACU controls a motor at two speeds If the actual position is far away from the target speed value the ACU commands the motor to use the fast speed Once the antenna comes close to threshold the target value the ACU slows down the motor The low speed threshold sets the angle deviation which lets the ACU use the fast motor speed Pointing The ACU performs the motor control as a closed loop if the angle reading and the target hysteresis value differ the motor is switched on to compensate the difference If the difference is le
84. rd direction REV activates the motor in reverse direction This configuration mode is convenient to control a motor with relays The movement direction for the polarization drive must be cabled as follows FWD moves the feed clockwise when looking through the antenna to the satellite This is valid for the northern hemisphere when operated on the southern hemisphere the motor must be cabled for the opposite direction The evaluation routines in the software which compute the antenna pointing for a given satellite location require the movement direction in this way The PL RESERV reflects the motor stopped state of the axis ON signals the OK state the signal turns off in case of a motor fault timeout or if the emergency stop signal is received Depending on the reason of the motor stop a motor reset command may be necessary to release the axis from this state pin signal DUAL START DIR START type 1 PL FWD E ON motor on right ON motor on OUT 2 PL FWD C OFF motor off OUT 3 PL REV E ON motor on left ON direction left OUT 4 PLREVC OFF direction right OUT 5 PL SPD1 E ON slow ON slow OUT 6 PLSPD1C OUT 7 PLSPD2E ON fast ON fast OUT 8 PL SPD2 C OUT 9 PL RES E reset driver reset driver OUT 10 PL RESC OUT 11 PL RESERV E axis stopped axis stopped OUT 12 PL RESERV C OUT 13 PLFAULTK driver fault driver fault IN 14 PLFAULTA IN
85. ription of this function you find at chapter 8 3 3 Smoothing 8 4 Adaptive Tracking Adaptive tracking is an extension to the standard step track method The ACU records the tracked positions over several days It computes a mathematical model from the recorded data which is used to predict the antenna position in case of a beacon receive failure The following paragraphs describe how the sat nms adaptive tracking algorithm works 8 4 1 The sat nms Adaptive Tracking Algorithm The motion of a geostationary satellite at the sky mainly is caused by an inclination of the satellite s orbit with respect to the earth s equatorial plane sometimes also by the fact that satellites decelerate in orbit The motion seen from the antenna s point of view can be described as the sum of harmonic oscillations with the frequency being multiples of the reciprocal of an sidereal day The mathematical models used by the sat nms adaptive tracking algorithm to predict the satellite s motion are finite sets of harmonic elements The coefficients of the elements are evaluated from the step track data recorded for several hours or days by means of the least square fit method The more elements are included to a model the better approximation of the true motion is possible On the other hand the number of data points used to evaluate a model is limited the measurements values are distorted due to inaccuracy and noise The more complicated a model is the
86. s If there are any faults with the ACU they are displayed in this field If there is more than one fault at a time the ACU concatenated the fault descriptions More detailed information about faults are available in chapter Faults and Tracking If one axis stops operation due to a fault the step tracking also stopps operation Possible faults are EMERGENCY Someone opened the emergency stop circuit The ACU stopped all STOP motors and stays in this state until the RESET button at the navigation bar is clicked HUB FAULT The ACU detected a hub fault condition CABINET OPEN BCRX TIMEOUT The ACU detected a cabinet open condition If the ACU reads the beacon level via TCP IP from a sat nms LBRX and the latter does not respond a BCRX TIMEOUT fault is reported Tracking Faults If the ACU has the tracking option installed any faults of the tracking module are shown in this field With tracking option this field is always empty AZ EL Tracking If the ACU has the tracking option installed and ADAPTIVE tracking is selected these give some information about the model of antenna satellite movement the ACU has C 2014 SatService GmbH WWw satnms com ACU ODM UM 1411 Page 24 61 SatService Gesellschaft f r Kommunikationssysteme mbH State calculated from the step track data M model The complexity of the model the ACU uses small medium large With a small amount of tracking data available
87. s Used for DC motors at small antennas Supported position sensors are separate hardware interface modules for each axis e Resolver Interface The resolver interface module contains a resolver to digital chip which does the decoding of the resolver sin cos signals e SSI Interface SSI is a high speed serial interface used by modern digital position encoders e DC Voltage Interface The third position encoder interface module contains an A D converter which is suited to measure the DC voltages produced by simple inductive angle encoders This application is for small antennas especially in the SNG business The paragraphs below give a short overview to the contents of the documentation A subset of this documentation is stored on the device itself the complete documentation is available on the sat nms documentation CD and at www satnms com e Safety Instructions This chapter gives an overview about the safety precautions that have to be observed during installation operation and maintenance e Unit Overview The installation chapter gives informations about the different modules that are integrated in the ACU not ACU ODM and ACU19 e Installation Start up The installation chapter guides through the installation and setup of the ACU outdoor module It describes the mechanical concept of the ACU and the assignment of the ACU s connectors It gives you informations about the starting up procedure Finally you learn in this chapter how to
88. s most of them are four characters long e Non numeric parameter values always are written in upper case e Numeric floating point values may be specified with an arbitrary precision however the device will reply only a fixed number of places The ACU recognizes a decimal point numbers must not contain any commas e There must not be any whitespace in front or after the in a message e If the command query is not of the form name value or name the ACU replies the message SYNTAX e If the message syntax is OK but contains an unknown parameter name is used the reply is UNKNOWN e Numeric parameters are cut to the limits defined for this particular parameter e Misspelled choice values cause the ACU to set the first value of the choice list e Assigning a value to a read only parameter will cause no fault however the ACU will overwrite this parameter immediately or some seconds later with the actual value 7 2 The TCP IP remote control interface Controlling the ACU through the network is done by means of HTTP GET requests Setting parameter values or querying readings or settings all is done by requesting HTTP documents from the ACU The message to the ACU thereby is coded into the URL as a CGI form parameter The ACU replies a one line document of the MIME type text plain The document name for remote control is rmt hence assuming the ACU is listening to the IP address 10 0 0 1 requesting a document with the
89. sat nms ACU ODM Antenna Control Unit Outdoor Module User Manual Version 4 3 2012 11 08 Copyright SatService Gesellschaft f r Kommunikatiosnsysteme mbH Hardstrasse 9 D 78256 Steisslingen satnms support satservicegmbh de www satnms com www satservciegmbh de Tel 49 7738 97003 Fax 49 7738 97005 SatService Gesellschaft f r Kommunikationssysteme mbH Table Of Contents Table Of E ntents un en ee ARE EL ds R 1 T Introduction enee e A En a TR E E aden tah eE dee eat eats 3 2 Safety Instr ctions z ieoa ren tenses ast e a begsacean iene des aae A a a E Ea E ATE TEOT KOSE 6 3 The satsnms A CU OD MAA a a a a a a a E E E A y A Installation en te Reel sites e e RE E e a E 7 4l Me chanic linstallation ci i ken A ER E A tees 8 4 2 Interfaces to the Antenna Pin descriptions 0ooooooocoononoconononononononononononono nono nono nono nono non nro non nro nono nnnnnnnns 8 4 2 1 Connector Layout ci LH 8 42 2 Pin descriptions 2 2 22 nn nn hee wee ai herein 8 4 2 3 Power Supply Cabling en na a ae ee eb ete si aba nn 18 O 18 4 3 1 Setting the IP Addres Sai kin 18 4 32 Limit Witches aida oda its 20 4 3 3 A gle deteci fs 428 288 2 A AAA lien 20 4 3 4 NN 20 4 3 Pointing Track A RR an ai aan 20 4 3 6 Backup of ACU settings Hr are ent od gues EE E E E EE E AREEN 21 PAO Sirino a WE EE EES EET ET E 22 5 1 Th Web based User Interface xica ia ai LEER 23 5 2 Antenna O A aed eel ee eee 23 3 3 Tar
90. sellschaft f r Kommunikationssysteme mbH Level threshold If the beacon level falls below this threshold value the ACU does not perform a step track cycle If the level falls below the threshold during the steptrack cycle the cycle gets aborted If the ADAPTIVE tracking is enabled and there is enough data in the tracking memory the ACU computes a mathematical model from the stored data and predicts the antenna pointing position from the extrapolation of the model If the tracking mode is set to STEP the ACU leaves the antenna where it is if the beacon level drops below the limit Adjusting the threshold level that adaptive tracking is switched as expected must be done carefully and may require some iterations specially if the beacon is received with a low C N A good starting value for the threshold is 10 dB below the nominal receive level or 2 dB above the noise floor the beacon receiver sees with a depointed antenna whatever value is higher To turn off the monitoring of the beacon level this in fact inhibits the adaptive tracking simply set the threshold the a very low value e g 99 dBm Smoothing interval This parameter controls the smoothing function Setting it to zero disables smoothing Smoothing lets the ACU point the antenna to positions evaluated from a simple model calculated from the step track peaks of the recent few hours A detailed description of this function you find at chapter 8 3 3 Smoothing Peak jit
91. sensor readings it includes some calibration parameters configurable at the Setup page The steps of calculating a pointing angle are as follows Get the raw value Extend left shift the value to 32 bits Reverse the sign if this option is set in the setup Apply add the pre scale offset PONE C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 49 61 SatService Gesellschaft f r Kommunikationssysteme mbH 5 Convert to degrees 6 Ifthe calibration scale is nonzero multiply by the calibration scale 7 Add the post scale calibration offset 8 For the azimuth axis add the antenna course too The angle calculated this way may exceed a full circle of 360 if the scaling ensures that there is no overflow of the encoder reading itself The value displayed as raw reading at the test page is the result of step 2 8 2 Pointing Motor Control The sat nms ACU performs the pointing motor control as a closed control loop independently for each axis If the measured position value differs from the target value the motor is activated to compensate this difference It makes no difference if a new target value has been commanded or if the antenna has moved a little bit due to a squall Hysteresis To avoid that the motor is switched forth and back all the time the ACU tolerates small differences between measured and target value within a hysteresis value This hysteresis is individually configurable for each axis
92. ses a simple sinusoidal model which does not provide this double frequency component Hence applying the smoothing function for such a satellite with more than 3 hours smoothing time may average the antenna movement path too much 8 3 4 Steptrack Parameters The behavior of the satellite step track is adjustable with a couple of parameters This permits to tune the step track performance for special preconditions arising from the antenna and also the satellite The first parameters listed below are setup parameters they are set once for an ACU installation to adapt the ACU to the antenna and the beacon receiver AZ Antenna diameter The diameter values are used by the ACU software to evaluate the antenna s EL Antenna diameter beamwidth There are separate values for both axes to handle offset antennas as well Beacon RX type With this parameter you specify which type of beacon receiver For a sat nms LBRX beacon receiver set it to SATNMS and set the receiver s IP address accordingly To make ACU and beacon receiver work together you should take care of the following e ACU and beacon receiver must be connected to the same Ethernet segment e Both devices must have assigned IP addresses in the same subnet e The LBRX beacon receiver must be configured for the correct LO frequency The displayed receive frequency must be the true RX frequency rather than the L band frequency C 2014 SatService GmbH www satnms com ACU
93. set the ACU s IP address which is a essential precondition to operate the ACU by means of a web browser C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 4 61 SatService Gesellschaft f r Kommunikationssysteme mbH e Operation The sat nms ACU is operated using a standard web browser like the Internet Explorer on MS Windows based computers The user interface design is straight forward and clearly structured Operating the ACU is mostly self explanatory Nevertheless the Operation chapter outlines the map of web pages which make up the ACU user interface and elaborately describe the meaning of each alterable parameter e Frontpanel Operation The sat nms ACU19 and the sat nms ACU RMU optionally are equipped with a frontpanel Human Machine Interface This chapter describes how to use this interface e Remote Control The ACU outdoor module provides a versatile remote control interface A monitoring amp control software may fully operate the ACU either through a TCP IP network connection or through the RS232 interface of the ACU This chapter describes the communication protocol used for remote control and lists all parameters accessible through the remote interface e Theory of Operation This chapter gives a short overview how the ACU works It also describes the different tracking algorithms and their parameters The interaction with a beacon receiver is described as well Knowing about the theory regarding this functio
94. size of the model SMALL a0 a1 a2 1 MEDIUM a0 a1 a2 a3 a4 2 LARGE a0 a1 a2 a3 a4 a5 3 If the beacon signal drops below it s theshold the antenna movement is calculated from these coefficients using the formulas shown below Amai Agt A cos wt ta sin wt 1 Q mediun Ay 4 cos wt a sin wt a cos 2 wt a sin 2 wt 2 Furge dot a COS wt a sin wt a cos 2 wt aysin 2 wt Hast 3 Hardware Test Page Example C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 29 61 SatService Gesellschaft f r Kommunikationssysteme mbH Outputs Outputs Inputs AZ motor forward Lo POL motor forward Lo POL limit switch H HI AZ motor reverse Lo POL motor reverse Lo POL limit switch L HI AZ motor speed 1 HI POL motor speed 1 Lo POL motor fault HI AZ motor speed 2 LO POL motor speed 2 LO Antenna hub fault HI AZ motor reset L POL motor reset LO Auxiliary input 1 LO AZ motor reserve HI POL motor reserve HI Auxiliary input 2 LO Auxiliary output Lo Auxiliary output 5 LO Auxiliary input 3 LO Auxiliary output Lo Auxiliary output 6 LO Auxiliary input 4 LO EL motor forward LO Summary OK HI AZ limit switch H HI EL motor reverse LO Tracking OK HI AZ limit switch L HI EL motor speed 1 H Beacon RX preset 1 LO AZ motor fault HI EL motor speed 2 LO Beacon RX preset 2 LO Emergency stop HI EL motor reset LO Beacon RX preset 3 LO EL limit switch H HI EL motor reserve HI Beacon RX preset 4 LO EL limit switch L HI Auxiliary output LO Aux
95. ss than the hysteresis value the ACU leaves the motor switched off This prevents the antenna from oscillating around the target value Motor The ACU monitors the position readings while the motor is running If there is no change in timeout the position readings for some time the ACU assumes to motor to be blocked and switches it off This motor timeout fault must be reset by the operator to release it A timeout value 0 disables the timeout Lower The minimum target value accepted at the user interface and via remote control This limit software limit prevents the ACU from running the antenna to the limit position under normal conditions C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 32 61 SatService Gesellschaft f r Kommunikationssysteme mbH Upper The maximum target value accepted at the user interface and via remote control This limit software limit prevents the ACU from running the antenna to the limit position under normal conditions Beacon Receiver Parameter Description Name Beacon Selects the source of the beacon level the ACU shall use Available options are SATNMS and RX type VOLTAGE In SATNMS mode the ACU reads the beacon level from a sat nms beacon receiver via UDP in VOLTAGE mode the A D converter input of the ACU is read Please mention that in SATNMS mode the beacon receiver must be set to send UDP datagrams to the ACU ODM Beacon The IP address of the
96. step lets the signal level decrease the antenna makes a double step in the opposite direction It the first step leads to a better receive level the tracking algorithm adds one or two steps in the same direction For a reliable tracking operation the step size have to be big enought to rech the maximum within the 3dB bandwith within in the entered cycle time This meas for an inclient satellite you need a shorter cycle time than for a geostationary satellite 8 3 2 ACU and Beacon Receiver To perform a step track the ACU requires the actually measured beacon levelas a rate of the received signal quality and therefore the closeness of the antenna pointing to the ideal value The sat nms ACU is capable to be operated both with the sat nms LBRX beacon receiver and with third party beacon receiver products With a third party beacon receiver the ACU reads the beacon level from an analog voltage input The beacon receiver therefore must provide a dB linear output voltage preferably in the range 0 10V If the sat nms beacon receiver is used then the beacon level is sent from the beacon receiver to the ACU via UDP packets on the LAN sal nms beacon receiver ard party beacon receiver beacon level voltage beacon level via UDP packets sat nns ACU ODM sat nms ACU ODM indoor control indoor control computer computer If asat nms LBRX beacon receiver is used with the ACU it additionally gets connected to the ACU thr
97. t any external ground or supply cabling The ACU treats a closed contact as OK contacts have to be opened to activate the function noted in the table below The fault output are mechanical relays which connect _C common circuit to the _NC normally closed circuit while the ACU is powered and OK In case of a fault or a lack of power supply the relays connect the _NO circuit to the _C circuit pin signal description type 1 EMER_STOP emergency stop OK if closed IN 2 GND_EXT IN 3 ANT_HUB_FAULT alarm hub fault OK if closed IN 4 GND_EXT IN 5 SW_CAB_OPEN alarm cabinet open OK if closed IN 6 GND_EXT IN 7 ACU_FLT_NC acu alarm connected to 9 if OK RELAY 8 ACU_FLT_NO connected to 9 if there is a FAULT RELAY 9 ACU_FLT_C RELAY C 2014 SatService GmbH Wwww satnms com ACU ODM UM 1411 Page 16 61 10 TRK_FLT_NC tracking alarm connected to 12 if OK RELAY 11 TRK_FLT_NO connected to 12 if there isa FAULT RELAY 12 TRK_FLT_C RELAY CON18 CON19 CON20 Resolver Interface SatService Gesellschaft fiir Kommunikationssysteme mbH Below the pinout of a resolver type interface board is shown The ACU is available with resolver SSI or analog position sensor interfaces You have to select type of interface when you order the ACU pin signal description type 1 GND 2 SIN resolver SIN IN
98. te movement of the antenna This is also valid for tracking faults like a PEAKING FAULT If a fault stay active in one axis and don t disappear during a RESET the tracking stops the operation For example if the polarisation have a fault azimuth and elevation stop the tracking operation C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 60 61 SatService Gesellschaft f r Kommunikationssysteme mbH 9 Specifications Technical Specification Position Encoding with three different interfaces via daughter boards Resolver digital SSI and potentiometer Quantization Error Resolver 16bit 0 0055 SSI 13bit 0 044 16bit 0 0055 17bit 0 0028 19bit 0 0007 receivers selectable Analog voltage input Option Tracking Accuracy System Interfaces Display Position 0 001 resolution Interface to beacon sat nms LBRX or analog voltage input 0 to 10V Better than 5 of receive 3dB beamwidth RMS The encoder coupling and alignment error should not exceed 0 003 to achieve the specified tracking accuracy The influence of antenna structure thermal error is not considered All interfaces via Mini Combicon MCV1 5 XX G 3 5 to M amp C and ACU IDU Ethernet or RS232 to 6 drive limit switches Azimuth Elevation and Polarization Interlock and motors off switches 3 angular detectors Motor driver interface for frequency inverter DC servos etc Via opto
99. ter string Date time 6 sver r o character string Software version tage r o h Tracking model age tcyc 1 1638 sec Tracking cycle time tdly 100 9999 msec Recovery delay temp r o C Temperature tdsc 0 99 character string C Target description 7 tflt r o 00 FF Tracking fault bits described below thrs r o h Tracking memory time r o character string Date time 6 tlog 1 1 Log to tracking memory tmod OFF STEP ADAPTIVE MEMORY PROGRAM Tracking mode 8 trty NEVER ONCE FOREVER Tracking retry on fault tnam character string Target name trst 1 1 Reset tracking memory trty NEVER ONCE FOREVER Tracking retry on fault tsta r o character string Tracking state tstp 1 100 Tracking step size C 2014 SatService GmbH WWw satnms com ACU ODM UM 1411 Page 44 61 wdog OFF ON SatService Gesellschaft f r Kommunikationssysteme mbH ON Sends a heatbeat to the AUX 8 output Remarks 1 Software capabilities are summed from the following values 1 step track amp adaptive tracking included 2 polar mount antennas supported 4 memory tracking ingluded 2 ACU variants with compass support provide other choices beside NONE for this parameter 3 ACU variants with GPS support provide other choices beside NONE for this parameter 4 ACU variants with inclinometer support provide other choices beside NONE for this parameter 5 for single
100. ter threshold If the jitter value of at least one axis exceeds this threshold the ACU raises an model fault If this happens three consecutive times the ACU resets the models of both axes Adaptive tracking will be possible not until 6 hours after this happens During adaptive tracking the ACU evaluates for each axis a figure called jitter The jitter value describes standard deviation of the measured peak positions with respect to the positions calculated from the currently selected model The figure is also expressed as a percentage of the antenna s beamwidth low values indicate that the model ideally describes the antenna s path High values indicate that s something wrong The step track results may be to noisy at low amplitudes or the model does not fit at all This may be the case if a satellite gets repositioned in the orbit A typical threshold value is 20 this will detect very early that a model does not fit to describe the satellite s motion If this value causes false alarms too often you may want to raise the threshold to 50 Setting it to 0 switches the threshold monitoring completely off AZ Maximum model type These settings let you limit the adaptive model to a simpler one the ACU EL Maximum model type would choose by itself The maximum model type can be set individually for each axis Normally you will set both axes to LARGE which leaves the model selection fully to the ACU s internal selection algorithms
101. terface The power supply 24V regulated The azimuth position sensor The azimuth motor driver circuitry The elevation position sensor The elevation motor driver circuitry 4 2 1 Connector Layout Below the connector layout of the ACU outdoor module is shown Except the network connector which is a standard 10 Base T Ethernet socket allconnectors are Phoenix Contact mini Combicon plugs clamps which are delivered together with the sat nms ACU ODM Pin 1 of each connector is the rightmost if you look at the screws of the connector and the plugs are directed to you CON17 CON16 CON15 CON14 CON13 CON12 CON11 CON10 CON20 CON19 CON18 Stop Alarm Limit Switches Polarization Motor GND Extern Elevation Motor GND 24V AZ Motor Azimut Elevation Polarization sat nms ACU ODM ACU RES f ACU RES ACU RES CON1 4 LAN con2 CON3 CON4 CONS CON6 CONT CONS CONS AUXIN 24V Extern AUX OUT AUX OUT Beacon RX Inclinometer RS232 422 fuse 24V DJ A Inside the ACU consists of a main board and two or three interface boards with the circuitry for the position sensors These boards are different for each type of position sensor Actually interfaces for three types of position encoders are available with the sat nms ACU SE e resolvers e SSI digital position encoders e analog voltage based sensors 4 2 2 Pin descriptions CON1 LAN Connector CON1 is the Ethernet 10Base T RJ45 connector Use a standard network ca
102. the ACU positions the antenna to a certain offset and then measures the level Between the moment when the antenna reached commanded position and the beacon level measurement the ACU waits some time to let the beacon level settle The optimal delay value depends on the beacon receiver s averaging post detector filter setting and is a quite critical for the steptrack performance If the delay is too short the beacon voltage does not reach its final value the steptrack does not properly recognize if the signal goes better or worse after a test step If the delay is too long the impact of fluctuation to the measures level grows and may cover the small level difference caused by the test step With the sat nms LBRX beacon receiver best results are achieved if the receiver is set to 0 5 Hz post detector filter bandwidth and a measurement delay of 1500 msec Recovery delay After the ACU has done the tracking steps for the elevation axis it waits some time before it starts tracking the azimuth axis This is to let the beacon level settle after the final position has been found A typical value for this parameter is 4000 msec Level averaging When measuring the beacon level the ACU takes a number of samples and averages them The standard value of 5 samples normally should not be changed Larger values will slow down the ACU execution cycle C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 27 61 SatService Ge
103. the name to get a dialog page where you can change the name The name is stored together with a satellite s pointing at the target memory page If you change the target pointing values the target name is set to unknown by the ACU Hence you first should adjust the antenna pointing then enter the satellite s name Tracking mode sat nms ACUs with the tracking option installed display the actual tracking mode state in this field ACUs without tracking show OFF all the time In STEP and ADAPTIVE tracking modes this field shows what the tracking actually is doing and some information about the tracking data in memory fill tells how many hours of step track data for calculating a model the ACU actually has in memory This data may be used in ADAPTIVE mode to predict the satellite movement in case of a beacon failure The smoothing which may be applied to the step track also relies on this data age means the age of the most recent successful tracking step In other words this describes how many hours ago the beacon was lost in case of a beacon failure Beacon level This field shows the beacon level as read from the beacon receiver Depending on the source defined at the Setup page this either is the beacon level reported by a sat nms LBRX beacon receiver via TCP IP of the level derived from the ACU s analog input Temperature The actual temperature inside the ACU enclosure This value is for information only ACU Fault
104. tional encoders 3 24V EXT power supply for motor drivers and C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 11 61 SatService Gesellschaft f r Kommunikationssysteme mbH 4 GND EXT external switches CON10 Azimuth Motor Driver All signals for motor control are provided as free floating opto coupler inputs outputs This gives a maximum of flexibility to adapt the cabling to the motor driver units They probably will combine one end of the control inputs to a common potential The ACU is capable to control motor drivers with different polarity concepts Example for wiring the motor drive signals 24V EXT Pin 2 4 6 8 10 12 CON10 13 15 Pin 1 3 5 7 9 11 GND EXT gt Pin 13 Example for wiring the motor status RH signals x NE y CON10 13 15 Ed 24V EXT 2 GNO EXT The ACU knows two different configuration modes to control a motor driver They are called DIR START and DUAL START In DIR START mode the FWD signal switches the motor on off the REV signal controls the motor direction This is the configuration many frequency inverters use In DUAL START mode the FWD signal switches the motor on in forward direction REV activates the motor in reverse direction This configuration mode is convenient to control a motor with relays The movement direction for the azimuth drive
105. tions specified in this manual Whenever it is likely that safety protection is impaired the unit must be made in operative and secured against unintended operation The appropriate servicing authority must be informed For example safety is likely to be impaired if the unit fails to perform the intended measurements or shows visible damage Ensure that the cabinet is proper connected to the protective earth conductor The circuit breaker that fuses the mains for the sat nms ACU has to switch off all phases AND the neutral wire as well WARNINGS e The outside of the equipment may be cleaned using a lightly dampened cloth Do not use any cleaning liquids containing alcohol methylated spirit or ammonia etc Follow standard Electrostatic Discharge ESD procedures when handling the Unit Apply the appropriate voltage according to the attached schematic In case of switching off all the circuit breakers is still voltage available at the mains terminals Only use shielded cable to connect the AZ and EL Motor The other components in the cabinet might be jammed through the harmonic waves the frequency inverters inject into the motor wires e Use only double shielded twisted pair cables e g CAT7 Ethernet cable to connect the resolvers to the sat nms ACU e Only ACU ODU If the Unit is equipped with an optional air ventilation avoid direct contact with jets of water normal rain is no problem C 2014 SatService GmbH www satnms com
106. ves the antenna to the left westward westward elevation FWD moves the antenna up FWD moves the antenna up polarization FWD turns the feed clockwise FWD turns the feed counterclockwise Look through the antenna to the satellite for the correct orientation of the left right clockwise directions The sense of the position sensors must set that the sensors give increasing values while the antenna moves FWD 8 3 Steptrack sat nms ACUs having the ACU ODM Software Upgrade Step Track installed are capable to track a satellite s position The following paragraph describes how the sat nms steptrack algorithm works Beside plain step track this option includes the so called adaptive tracking and a file program tracking facility as well While step track and adaptive tracking require a beacon receiver to be connected to the ACU the file program tracking works without any beacon measurement 8 3 1 The sat nms Steptrack Algorithm The principle of satellite step tracking is quite simple For each axis move the antenna a small amount away from the satellite move it a small amount to the other site and finally point the antenna to that position where the signal is the strongest The sat nms ACU uses an optimized variant of this method which lets the tracking find the best pointing peak with a minimum amount of depointing Within one step track cycle on one axis the ACU does several very small steps Using the position and b
107. w active i e the ACU expects current flowing through the optocoupler while the driver is OK if the circuit is opened the ACU signals a fault and stops the motor If the motor driver does not provide a fault signal the clamps of the FAULT input must be wired to 0V 24V otherwise the ACU will not move the motor The ACU knows two different configuration modes to control a motor driver They are called DIR START and DUAL START In DIR START mode the FWD signal switches the motor on off the REV signal controls the motor direction This is the configuration many frequency inverters use In DUAL START mode the FWD signal switches the motor on in forward direction REV activates the motor in reverse direction This configuration mode is convenient to control a motor with relays The speed select signal SP1 and SPD2 actually are the same signal but with different logical polarity For most motor drivers it is sufficient to connect one of these two signals select the one which matches the polarity the motor driver expects C 2014 SatService GmbH www satnms com ACU ODM UM 1411 Page 50 61 SatService Gesellschaft f r Kommunikationssysteme mbH Very important is how the direction of movement is wired The proper direction depends on if the antenna is operated on the northern or on the southern hemisphere axis northern hemisphere southern hemisphere azimuth FWD moves the antenna to the right FWD mo

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