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Calian SatService sat-nms ACU-19V, Руководство пользователя

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Calian SatService sat-nms ACU-19V Скачать руководство пользователя страница 54

Remark for operation in the northern/southern hemisphere:

Look 'through the antenna' to the satellite for the correct orientation of left/right, up/down and
clock/counterclockwise.

axis

northern hemisphere

southern

hemisphere

azimuth

FWD moves the antenna to the right, the position sensor must
increasing the measured value. FWD moves the antenna
'westward'

The center direction to the satellite orbit is 180°. Turning angles are between 0 to 360° | FWD
moves the antenna to the right, the position sensor must increasing the measured value. FWD
moves the antenna 'eastward' The center direction to the satellite orbit is 0°. Turning angles are
between -180 to +180° | | elevation | FWD moves the antenna up, the position sensor must
increasing the measured value. Turning angles are between 0 to 90° | FWD moves the antenna
up, the position sensor must increasing the measured value. Turning angles are between 0 to
90° | | polarization | FWD turns the feed clockwise, the position sensor must increasing the
measured value. Turning angles are between -180 to 180° | FWD turns the feed clockwise, the
position sensor must increasing the measured value. Turning angles are between -180 to 180° |

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 beacon level values of all steps in the cycle, the ACU calculates the peak position by
aligning the approximated antenna pattern to the measured points.

(C) 2022, SatService GmbH

www.satnms.com

ACU-19V-UM-2209 Page 53/64

Содержание SatService sat-nms ACU-19V

Страница 1: ...ACU 19V User Manual Version 5 0 002 Copyright SatService Gesellschaft f r Kommunikationssysteme mbH Hardstrasse 9 D 78256 Steisslingen satnms support satservicegmbh de www satnms com www satservicegm...

Страница 2: ...the IP Address 15 4 3 2 Angle detectors 16 4 3 3 Driver Interface 16 4 3 4 Pointing Tracking 16 4 3 5 Backup of ACU settings 17 5 Operation 18 5 1 The Web based User Interface 19 5 2 Antenna Pointing...

Страница 3: ...55 8 3 3 Smoothing 56 8 3 4 Steptrack Parameters 57 8 4 Adaptive Tracking 58 8 4 1 The sat nms Adaptive Tracking Algorithm 60 8 4 2 The Tracking Memory 61 8 4 3 Adaptive Tracking Parameters 62 8 5 Pro...

Страница 4: ...l which is used to predict the antenna position This reduces the step track failures and provides continuous operation in case of a beacon receive failure In the Program Tracking Mode the antenna foll...

Страница 5: ...4 3 Adaptive Tracking Parameters 8 5 Program Tracking 8 5 1 Practical Usage 8 5 2 File Format 8 6 Faults and Tracking 9 Specifications 1 Introduction The sat nms Antenna Control Unit is an antenna co...

Страница 6: ...Supported position sensors are separate hardware interface modules for each axis Resolver Interface The resolver interface module contains a resolver to digital chip which does the decoding of the res...

Страница 7: ...ters The interaction with a beacon receiver is described as well Knowing about the theory regarding this functions helps to find the best parameter settings for a given application Specifications At t...

Страница 8: ...ith an optional air ventilation avoid direct contact with jets of water normal rain is no problem 3 The sat nms ACU19V The sat nms ACU19V is an advanced automatic tracking antenna controller It can be...

Страница 9: ...drive Interface This interface commands the external driver unit to move the antenna in 3 axis Please refer to chapter Interfaces to the antenna Pin descriptions for more detailed informations 3 4 An...

Страница 10: ...tion The sat nms ACU19V is completely integrated into a 1RU 19inch case with standard mounting holes The case of the sat nms ACU19V is not strong enough to carry the complete unit only on the front mo...

Страница 11: ...ult IN 15 El FLT El Fault IN 16 E Stop E Stop IN 17 Com FLT Az El Fault Common IN 18 Sum Lim Sum Limit IN 19 E Stop E Stop IN 21 Az HSP Azimuth high Sp Cmd OUT 22 El HSP Elevation high Sp Cmd OUT 23 D...

Страница 12: ...standard at the connector To avoid ground loops the cable shield should be connected either to pin xxx at the ACU or to the ground at the encoder housing never at both ends The power supply outputs ar...

Страница 13: ...ance 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 res...

Страница 14: ...implemented yet and is reserved for further expansions J11 LAN Connector Connector Type RJ45 male J11 is the Ethernet 10Base T RJ45 connector Use a standard network cable to connect the sat nms ACU RM...

Страница 15: ...ly and the Ethernet network 5 Start up the system and set the parameters as described below 6 As last step enable the drive interface and start them up as described below 4 3 1 Setting the IP Address...

Страница 16: ...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 I...

Страница 17: ...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 if nothing collides 6 Set the soft limits to...

Страница 18: ...7 Right click 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...

Страница 19: ...f a web page you want to see type in the IP address of the sat nms ACU 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...

Страница 20: ...nded value do not cause the motors to be driven in this mode Standby mode can be used for maintenance purposes or to move the antenne by actuating the frequency inverters directly by hardware circuits...

Страница 21: ...splayed 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 a...

Страница 22: ...is 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 para...

Страница 23: ...na 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 addi...

Страница 24: ...robably 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 seco...

Страница 25: ...mplitudes 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 d...

Страница 26: ...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 comm...

Страница 27: ...age 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 Desc...

Страница 28: ...rent 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 clic...

Страница 29: ...ation scale Normally the ACU assumes that the full range of a position sensor corresponds 360 If you are using a multiturn position sensor or if the position sensor is mounted to the shaft of a gear r...

Страница 30: ...the ACU from running the antenna to the limit position under normal conditions Beacon Receiver Parameter Name Description Beacon RX type Selects the source of the beacon level the ACU shall use Availa...

Страница 31: ...re 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...

Страница 32: ...the password for the user login Default password is user When you are logged in as user you can command the antenna pointing set the tracking parameters if applicable and store recall targets You can...

Страница 33: ...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 Ha...

Страница 34: ...ize small steps x keypress x is the value that was set on the setup screen large steps 10 x keypress continuous mode the antenna moves as long until the button is pushed or a limit switch or limit val...

Страница 35: ...e Keys The front panel keyboard provides beside the numeric keys four arrow keys and two keys named ENTER and CLEAR Some keys have a second meaning The first meaning of the keys remains constant throu...

Страница 36: ...shows the actual target name and the three axes angles The lower line shows the selected tracking mode depending on tracking mode the size of the tracking memory and the model data or nothing and the...

Страница 37: ...cted target After a target recall the display returns to the main menu Press to return to the default display or wait about a 1 minute for automatically return 6 4 Step move The antenna can be moved o...

Страница 38: ...rface 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...

Страница 39: ...nly 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 thro...

Страница 40: ...e 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 pr...

Страница 41: ...e alon 180 000 180 000 E Antenna longitude amax 3600 000 3600 000 AZ Upper limit amdt r o character string AZ Model type amin 3600 000 3600 000 AZ Lower limit ammx SMALL MEDIUM LARGE AZ Maximum model...

Страница 42: ...samples Level averaging bcfr 1000 000 40000 000 MHz Beacon RX frequency bcip aaa bbb ccc ddd Beacon RX IP address bclc Calculate level offset bcof 200 00 0 00 dBm Beacon RX 0V level bcsc 5 0000 5 0000...

Страница 43: ...from El value ecoe r o see below EL model coefficients ehys 0 000 2 000 EL Pointing hysteresis einv NORMAL INVERTED EL Sense invert ejtr r o 0 EL Peaking jitter emax 3600 000 3600 000 EL Upper limit...

Страница 44: ...t etsz r o EL tracking step size goto 0 99 Goto target gper r o GPS error status gpsa r o GPS satellites gpty NONE GPS receiver type 3 ibit 00000000 FFFFFFFF Input bits described below icty NONE Incli...

Страница 45: ...ower limit pmot DUAL START DIR START NONE PO Motor driver type pofs PO Pre scale offset ppos r o 90 000 90 000 PO Pointing praw r o 00000000 FFFFFFFF PO raw pointing psca 0 000000 100000 000000 PO Cal...

Страница 46: ...r string Software version tage r o h Tracking model age tcyc 1 1638 sec Tracking cycle time tdly 100 9999 msec Recovery delay tdsc 0 99 character string Target description 7 temp r o C Temperature tfl...

Страница 47: ...is parameter 5 for single step move use following commands command description ll Azimuth large step left l Azimuth small step left r Azimuth small step right rr Azimuth large step right dd Elevation...

Страница 48: ...AUX4 reserved 8 IN_AZHLM azimuth hi limit 9 IN_AZLLM azimuth lo limit 10 IN_AZFLT azimuth motor fault 11 IN_EMERG emergency stop 12 IN_ELHLM elevation hi limit 13 IN_ELLLM elevation lo limit 14 IN_ELF...

Страница 49: ...OUT_AZ_RESERVE reserved for extended motor control 6 OUT_AUX1 not used 7 OUT_AUX2 not used 8 OUT_EL_FWD elevation motor forward 9 OUT_EL_REV elevation motor reverse 10 OUT_EL_SPD1 elevation motor low...

Страница 50: ...icant 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 fa...

Страница 51: ...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...

Страница 52: ...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 an...

Страница 53: ...orward 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...

Страница 54: ...he measured value Turning angles are between 180 to 180 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 pa...

Страница 55: ...ne 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...

Страница 56: ...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 headro...

Страница 57: ...same subnet 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 At the sat nms LBRX...

Страница 58: ...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 Trackingmode The tr...

Страница 59: ...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 more susceptible it is to noise For practical usag...

Страница 60: ...s half 3dB beam width to evaluate this measure The ACU presents this figure as a percentage value The ACU selects the adaptive tracking model following a scheme as illustrated in the diagram above Be...

Страница 61: ...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 Trac...

Страница 62: ...ored 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 wi...

Страница 63: ...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...

Страница 64: ...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 Jump Values of angle encoder 5 in azimut...

Страница 65: ...the specified tracking accuracy The influence of antenna structure thermal error is not considered System Interfaces Az El angle detectors DSub25 female Pl angle detectors DSub9 female Drive Interface...

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