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Calian SatService Sat-nms User Manual

Radiometer controller
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sat-nms RMC
Radiometer Controller
User Manual
Version 1.7 / 2011-02-20
© Copyright
SatService Gesellschaft für Kommunikatiosnsysteme mbH
Hardstrasse 9
D-78256 Steisslingen
www.satnms.com
www.satservicegmbh.de
Tel +49 7738 99791-10
Fax +49 7738 99791-99

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  • Page 1 sat-nms RMC Radiometer Controller User Manual Version 1.7 / 2011-02-20 © Copyright SatService Gesellschaft für Kommunikatiosnsysteme mbH Hardstrasse 9 D-78256 Steisslingen www.satnms.com www.satservicegmbh.de Tel +49 7738 99791-10 Fax +49 7738 99791-99...

  • Page 2: Table Of Contents

    Table Of Contents Table Of Contents ..........................1 Introduction ............................2 Installation ............................2.1 Safety Instructions ........................2.2 Setting the IP Address ........................2.3 Connecting the RMC ........................2.3.1 Connector Layout ........................2.3.2 RMC Pin Descriptions ......................2.3.3 Power Supply Cabling ......................2.3.4 Mechanical Installation ......................
  • Page 3 6.1 sat-nms RMC ..........................6.2 sat-nms RMD ..........................(C) 2020, SatService GmbH www.satnms.com RMC-UM-2002 Page 2/47...
  • Page 4 (C) 2020, SatService GmbH www.satnms.com RMC-UM-2002 Page 3/47...

  • Page 5: Introduction

    1 Introduction T he sat-nms Radiometer Controller (RMC) is a controller for radiometers. It is not only for use as core module for new radiometers in any frequency band, but also to upgrade existing radiometers. It was developed by SatService GmbH including a highly linear sat-nms Radiometer Detector (RMD) for the detection of the noise signal in any IF band between 50 and 2000MHz.

  • Page 6: Safety Instructions

    2 Installation This chapter describes how to install the sat-nms Radiometer Controller (RMC). You find a guide how to connect, configure and mechanically mount the RMC below. Before you start, please first read the Safety Instructions chapter below. It contains some important recommendations to prevent damage from the RMC.

  • Page 7: Setting The Ip Address

    In case of a failure do not open the sat-nms RMC enclosure, you will lose warranty. Call SatService GmbH for an RMA number. Observe normal safety precautions when operating, servicing, and troubleshooting this equipment. Take standard safety precautions with hand and/or power tools. 2.2 Setting the IP Address Before you can operate the RMC, you need to set the RMC’s IP address.

  • Page 8: Connecting The Rmc

    the list, the configuration program has found other devices in this network segment which use the same technology. 6. Now type CTRL+I to open the IP configuration window of the program. In this form enter the RMC serial number, it's new IP address and network mask. If the RMC later shall be operated through a router, enter the address of the router on the gateway field, otherwise leave this field blanc.

  • Page 9: Rmc Pin Descriptions

    2.3.2 RMC Pin Descriptions CON1 I2C/Key Interrupt CON1 is the connector to the on-board I2C-Bus and a Key Interrupt input. This port is to connect an external Handheld. Actually this connector is not used and cabling is not required. pin signal description type Power supply OUT...
  • Page 10 TEMP 9 in TEMP 10 out RX 2 noise source TEMP 10 in TEMP 11 out RX 2 peltier-block TEMP 11 in TEMP 12 out RX 2 cold-load TEMP 12 in in CON4 Temperature Monitor CON4 provides four inputs for NTC-Temperature-Sensors. Connect only the temperature-sensor which belongs to the described measurement point.
  • Page 11 TEMP 16 in CON9 Temperature Monitor CON9 provides four inputs for NTC-Temperature-Sensors. Connect only the temperature-sensor which belongs to the described measurement point. This is necessary for a correct function of the RMC. If you don’t need a measurement point, leave it open. pin signal description type...
  • Page 12 Jumper for configuration of serial interface There is one jumper to select between RS4xx and RS232 interface driver. Put the jumper to position RS-232 (right) to select the RS232 interface. The second jumper switches between the RS422 4-wire mode and RS485 2-wire mode. To select RS485 2-wire mode put the jumper to position RS-485 (right).
  • Page 13 CON19 Redundant Power Supply CON19 is to connect a redundant power supply for the RMC and for the external devices. For a redundant power supply system you have to connect four power supplies. pin signal description type Red. Redundant power supply for the RMC and the position encoders +24V Red.
  • Page 14 SSI CLK+ SSI clock+ SSI CLK- SSI clock- OUT- encoder power supply OUT +24V encoder power supply IN CON14 Elevation Motor Controls All signals for motor control are provided as free floating optocoupler 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.
  • Page 15 Example for wiring the motor drive signals Example for wiring the motor status signals pin signal description type AZ FWD C Motor forward OUT+ AZ FWD C OUT- AZ REV C Motor rewind OUT+ AZ REV E OUT- AZ RESERVE C Reserve OUT+ AZ RESERVE E OUT-...
  • Page 16 Example for wiring a waveguide switch CON23 Waveguide-switch RX1 At CON15 the RMC provides a connection for a waveguide switch related to RX 1. pin signal description type POS A Position A COM POS POS B Position B IND A Indication Pos A IN COM POS IND B...
  • Page 17 BLW REFL E BLW REFL C Blower for reflector HEAT REFL E HEAT REFL C Heater for reflector HEAT HORN E HEAT HORN C Heater for horn antenna CON17 RX-Control CON17 provide some outputs to control the components in a radiometer receiver (circulator, noise-diode, LO).

  • Page 18: Power Supply Cabling

    EL HIGH Upper limit Elevation GND EXT AZ LOW Azimuth left limit (view from behind antenna) GND EXT AZ HIGH Azimuth right limit (view from behind antenna) IN GND EXT MNL CTRL Manual Control feedback GND EXT CON25 Pressure Pump CON25 provides a input and a output to connect a pressure pump.

  • Page 19: Rmd Pin Descriptions

    Below the connector layout of the sat-nms RMD is shown. For the IF inputs, external filters and for the dc outputs are all connectors SMA. This provides a maximum resistance against interferer. The detector is shown from top view. In this position you can read the label correct. Connector Layout 2.4.2 RMD Pin Descriptions...

  • Page 20: Power Supply

    X10 is the input connector for the IF Channel 2. description type X10 IF input channel 2; DC blocked ; 50Ohm SMA female connector OUT X9, X8 External Filter Channel 2 X9 and X8 are connectors for an external filter. There is a 70MHz IF filter on-board. If you don’t use this frequency, you can connect an external filter.
  • Page 21 provided on the documentation CD or direct at SatService GmbH. The tool formats the compact flash card with simple text files, for each day one and filled with zeros. The name format of the files is: yyyymmdd.txt. Insight the files the format for every line is: 20090814121723 11.7 15.2 19.6 or generally yyyymmddhhmmss channel1 channel2 channel3.

  • Page 22: Operation

    3 Operation T he sat-nms radiometer is designed to be controlled over a network link using a standard web browser. This means in practice, that the user interface to the radiometer appears in your browser window after you type in the radiometer's IP address in the address field of the browser program. Operating the radiometer is mostly self-explanatory.

  • Page 23: Operational Parameters

    available. If there is no motor control installed for this axis, the value entered at the settings page is displayed here. MOVING is displayed beside the reading if the motor is on. HI-LIMIT signals that the antenna is at the hi (upper/right) limit. LO-LIMIT signals that the antenna is at the low (left) limit.
  • Page 24 note, that the radiometer takes no readings while the antenna is moving. Important Remark: Even if the radiometer has no motorized azimuth adjustment, you should enter the antenna azimuth direction here as precise as possible. The sun outage detection depends on this value.

  • Page 25: Presets

    Averaging The base integration time of the radiometer front end is one second. The radiometer is time capable to apply an additional averaging to the readings which is configured here. The averaging is a simple FIR filter of the specified length (e.g. 5 seconds averaging time means that the displayed reading is the average of the last five values).
  • Page 26 Channel 1/2/3 Calibration Constants These calibration constants appear three times for each radiometer channel separately. Parameter Description Name Noise The basic calibration factor, calibrates the pulse count to atmospheric temperature correction calculation. The noise correction factor usually is determined by a cold-load calibration. The cold-load calibration procedure built into the radiometer's software sets this value automatically when operator accepts the calibration result.

  • Page 27: Tip Curve Calibration

    load The I-factor of the PI closed loop temperature control. loop factor Temp. If the target / actual values of the control loop differ by more than this limit, a reference load diff. fault temperature control fault is signaled. limit Tip Curve Calibration The settings in this section define the parameters of a tip curve calibration / verification.

  • Page 28: Cold-Load Calibration

    The radiometer always measures / calibrates all available channels in parallel. When the tip curve calibration has finished, the program shows a table with the measurement results instead of the normal readings page. The table shows for each channel the following parameters: Slope The slope of the linear regression function calculated from the measured points.
  • Page 29 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 radiometer.
  • Page 30 Position With this parameter you set the type of position sensor the radiometer shall read for this axis. sensor Known sensor types are: type SSI-13B (13 bit binary) SSI-13G (13 bit gray code) SSI-17B (17 bit binary) SSI-17G (17 bit gray code) NONE Setting the sensor type to NONE disables any motor control for this axis.
  • Page 31 User Defines the user password (default 'user'), which is required to change any parameters Password from the Settings page. An empty password disables the password prompting. Administrator Defines the administrator password (default 'admin'), which is required to change any Password configuration or calibration settings.

  • Page 32: Remote Control

    4 Remote Control The sat-nms radiometer may be controlled remotely by a monitoring and control application either through the TCP/IP interface or through a serial RS232 interface. Both communication methods use the same commands and parameters, however, there are different frames around each message depending communication method used.

  • Page 33: The Rs232 Remote Control Interface

    This way all parameters may be queried or set, you may use your favourite web browser to try out the remote control of the radiometer manually. 4.3 The RS232 remote control interface Beside the network interface, the radiometer also provides an RS232 serial port which can be used to control the device remotely.
  • Page 34 alp1 #.### Feed weight factor (a) alp2 #.### Feed weight factor (a) alp3 #.### Feed weight factor (a) amax #.### ° AZ Upper limit amin #.### ° AZ Lower limit apos r/o #.### ° AZ Pointing asca #.###### AZ Calibration scale asen SENS_OPTIONS AZ Position sensor type...
  • Page 35 lw22 #.### W/G & coupler loss (L_wg2) lw23 #.### W/G & coupler loss (L_wg2) lw31 #.### Waveguide loss (L_wg3) lw32 #.### Waveguide loss (L_wg3) lw33 #.### Waveguide loss (L_wg3) lw41 #.### Waveguide loss (L_wg4) lw42 #.### Waveguide loss (L_wg4) lw43 #.### Waveguide loss (L_wg4) lw51...
  • Page 36 tcc1 r/o #.#### T/C result correlation tcc2 r/o #.#### T/C result correlation tcc3 r/o #.#### T/C result correlation tcdy T/C measurement delay tcma ° T/C maximum elevation tcmi ° T/C minimum elevation tcnm T/C number of steps tcrv Start/stop/accept tip curve tcsk Cosmic temperature tflt...
  • Page 37 tct2 NO,YES T/C result accept tct3 NO,YES T/C result accept tcl1 r/o #.#### T/C corr. feed loss (L_h) tcl2 r/o #.#### T/C corr. feed loss (L_h) tcl3 r/o #.#### T/C corr. feed loss (L_h) ccld Start/stop/accept C/L calib clav C/L samples to average clt1 C/L channel 1 nominal temp.

  • Page 38: Ftp Download

    elevation low limit switch elevation high limit switch elevation motor error azimuth moving elevation moving antenna manually controlled rain detected tip curve calibration in progress logging to CF card failed cold-load calibration in progress 4.5 FTP Download The radiometer controller stores on the compact flash card every second the measured sky temperature from each channel (see also chapter 2.5 Format Compact Flash Card).
  • Page 39 RM = ASCII(82) + ASCII(77) = (159 Modulo 96) = 63 + 32 = '_' For the three implemented Commands the Checksum Character is the following Frame Checksum Type Measured Data Houskeep Data System Status It is possible to connect to this port with a simple telnet client. To establish a connection , the following command is entered at a Command Line: telnet 192.168.2.76 2101 (You have to enter the correct IP- Adress).
  • Page 40 Antenna reflector temperature Customer specific not used Customer specific not used Customer specific not used In a 13.5GHz the Answer is: H -50.00,-50.00,-50.00,-50.00,-50.00,-50.00,-50.00,-50.00, ##.##, ##.##, ##.##, ##.##, ##.##, ##.##, ##.##, ##.##, ##.##, ##.##,-50.00,-50.00,-50.00 If no temperature sensor is present, the RMC returns the value '-50.00'. 13.5GHz Radiometer description RMC Sensor Not used...
  • Page 41 number (C) 2020, SatService GmbH www.satnms.com RMC-UM-2002 Page 40/47...

  • Page 42: Theory Of Operation

    5 Theory of Operation This section gives some background information about how the sat-nms RMC works. Chapter 5.1 Radiometer Concept describes how the sat-nms RMC measures the atmospheric attenuation and how the measurement concept works. Chapter 5.2 Radiometer Calibration describes the calibration of a radiometer with the sat-nms RMC. Chapter 5.3 Antenna Control Unit describes how the sat-nms RMC measures the antenna pointing and how...

  • Page 43: Radiometer Calibration

    With this relation in equation 5.5 we can calculate the noise power at the noise injection point. 'b' is a calibration factor for the added amount of the noise diode. (5.5) The receiver system is not ideal matched and a small amount of power is reflected by the antenna. For this equation 5.6 subtract the reflected power.

  • Page 44: Tip-Curve Calibration

    (5.16) The reflected power of the mismatched receiver is subtracted with 5.17. (5.17) The waveguides are also afflicted with ohmic losses. Equations 5.18, 5.19, 5.10 correct this influence. (5.18) (5.19) Finally the displayed value is calculated with equation 5.20. (5.20) The RMC set the factor b=1 for a calibration, so that the natural value is measured.

  • Page 45: Angle Calibration

    The sat-nms RMC provides an interface for SSI type digital position encoders. These encoders are precise, reliable and provide a standardised interface. The RMC supports types with 13bit and 17bit resolution, both, gray coded and binary variants. The RMC provides 5V and 24V supply voltages (200mA max) for the encoders, so external power supplies may be omitted in most cases.
  • Page 46 elevation FWD moves the antenna up FWD moves the antenna up Look 'through the antenna' to the sky 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.

  • Page 47: Specifications

    6 Specifications 6.1 sat-nms RMC Technical Specification bit resolution recommended hysteresis Temperature measurement 0K…308K range Radiometer type implemented Noise balancing, Noise injection Integration time constant 1s…60s Number of radiometers to be controlled simultaneously Number of frequency selectable 2 (in one of the two radiometers) Switching rate circulator 256HZ Measurement resolution...
  • Page 48 Input noise figure <10dB Coupling input to output test-port 35dB Input level measurement range -128…-118dBm/Hz Analog output voltage range 0V…5V Temperature Sensor Internal NTC-Resistor; 30k/25°C Electrical and Mechanical Specification, Environmental Conditions Supply Voltage 12…24V DC 550mA Temperature range Humidity 5° to 50° C up to 90% non condensation DIN rail module 110x74x30mm;...

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