Satel SATELLINE-1AS User Manual
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Satel SATELLINE-1AS User Manual

Satel SATELLINE-1AS User Manual

Radio data modem
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SATELLINE-1AS and SATELLINE-2AS
Radio Data Modem
USER GUIDE

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Summary of Contents for Satel SATELLINE-1AS

  • Page 1 SATELLINE-1AS and SATELLINE-2AS Radio Data Modem USER GUIDE...

  • Page 2: Table Of Contents

    6.2.1 RF cables 6.2.2 Interface cables 7 Check List Appendices 1. The timing diagram of RS-232 interface of SATELLINE-1AS and SATELLINE-2AS radio modems 2. Selecting of radio channel of SATELLINE-2AS 3. Table of selectable radio channels 4. SATELLINE-1AS/2AS RSSI curve...

  • Page 3: Satelline-1As And Satelline-2As Radio Data Modems

    RSSI Fig. 1. SATELLINE-1AS radio modem The SATELLINE-1AS radio data modem is comprised of a 450 MHz transmitter, receiver and a modem board, housed in a compact resistant aluminium casing. It has an RS-232 interface that allows easy connection to a variety of data networks.

  • Page 4: Rs232 Pin Connections

    Transferring text to displays w For use with Global Positioning System (GPS) With two SATELLINE-1AS/-2AS radio data modems it is easy to make up point to point connections. The power level of the transmitter is 0,5 W. It is possible to reach distances from 2 to 30 km depending on topographical conditions and antenna locations.
  • Page 5 SATELLINE-1AS and SATELLINE-2AS Operation description of the lines pin by pin: DTR operates as an ON/OFF switch of the modem "0" (0 V...-12 V) "1" (+5 V...+12V) CD indicates a signal on the radio channel exceeding the level of sensitivity of the modem (it can record radio interferece signal).

  • Page 6: Technical Specifications

    SATELLINE-1AS and SATELLINE-2AS Technical Specifications SATELLINE-1AS Satelline-1AS complies with the following international standards: CEPT T/R 20-04 (radio standard) and the model m2 also with prETS 300 683 (EMC standard) TRANSMITTER Frequency Range 400...470 MHz Channel Separation 25 kHz Frequency Stability <...
  • Page 7 SATELLINE-1AS and SATELLINE-2AS GENERAL Operating Voltage + 10...+ 13 Vdc Current Consumption When DTR is "0": 0.4 mA When DTR is "1": Receiving: 55 mA Transmitting: 330 mA Antenna Connector TNC, 50 ohm, female Size H x W x D...

  • Page 8: Asynchronous Data Transmission

    SATELLINE-1AS and SATELLINE-2AS GENERAL Operating Voltage + 10...+ 14 Vdc Current Consumption When DTR is "0": 2,8 mA When DTR is "1": Receiving: 90 mA Transmitting: 600 mA Antenna Connector TNC, 50 ohm, female Size H x W x D...

  • Page 9: Effects Of Character Length On Transmission

    SATELLINE-1AS and SATELLINE-2AS (DTE) and its own clock signal by adding one stop bit if required. The radio data modem transfers parity bits as they are received. Effects of character lenght on transmission The transmitted data character can be either 10 or 11 bits, the length of these characters is determined by hard wiring on the modem board.

  • Page 10: Reception

    SATELLINE-1AS and SATELLINE-2AS Reception The radio modem is ready to receive data when the supply voltage is switched on and the DTR line is in the "ON" state. Equipment connected to the radio data modem receives information about the incoming data by detecting the change in state of the RD line.

  • Page 11: Polling

    - natural obstacles - interferences caused by radio frequencies The transmitter power of the base model of SATELLINE-1AS/2AS is 0.5 W and sensitivity of receiver more than -108 dBm. Thus in a flat area and in free space with a 1/4 wave antenna (antenna amplifcation 1dBi) and an antenna height of 1 m communications from 3 km to 4 km can be achieved.

  • Page 12: Radio Field Strength

    A communications network can also be built with a combination of cables and radio data modems. The SATELLINE-1AS/2AS radio data modem operates in the 450 MHz band where interference caused by human beings is insignificant. Long distance interferences need not to be taken into account even in special weather conditions.

  • Page 13: Installation

    SATELLINE-1AS and SATELLINE-2AS However, the reflected waves will suffer a loss in power once they travel over a certain distance, this means that they combine with the direct radio waves and interact in either weakening or strenghtening the signal respectively. In reality attenuation can even occur at 40 dB which is very sharp and the effect on the 450 MHz frequency is about 35 cm difference.

  • Page 14: Rs-232 Interface

    SATELLINE-1AS and SATELLINE-2AS RS-232 Interface The radio modem is connected to terminal via RS-232 interface. A typical connection where all handshaking lines are used is according to the figure below. Radio modem 9-PIN D-CONNECTOR 25-PIN D-CONNECTOR SGND SGND SGND FUSE 630 mA slow...

  • Page 15: Mounting The Antenna

    "0" when possible. In this case the current consumption is approx. 0.2 mA (SATELLINE-1AS and -1ASl) or 3 mA (SATELLINE-2AS and -2ASx). In mobile use the radio modem is required to have a direct connection to the main vehicle battery in order to avoid additional interference.
  • Page 16 SATELLINE-1AS and SATELLINE-2AS The metal-free zone around small antennas should be at least 1/2 m and big antennas >5 m. The metal-free zone should be > 10 m around a relay antenna combination. This means that, if a large network of radio modems is to be installed the best place for the antenna is at the highest point of the building or even the use a radio mast.
  • Page 17 SATELLINE-1AS and SATELLINE-2AS Vertical polarized systems (antenna elements are in vertical position) are often used in radio systems. In a system between a base station and sub-stations the vertical polarization is generally recommendable. The antenna of the radio modem can not be mounted on the same level with the other sub-station antennas in the same building.

  • Page 18: Equipment

    SATELLINE-1AS and SATELLINE-2AS Equipment The connection of antennas to radio modems Recommended antenna types are as follows: 6.1.1 Hand portable equipment 1/4 wave antenna (wave length on 450 MHz is about 70 cm) Helix antenna The antennas are mounted directly on to the antenna connector (TNC) at the top of the radio modem.

  • Page 19: Cables

    SATELLINE-1AS and SATELLINE-2AS Cables NOTE ! Please check, that the contact area of cable connectors is gold plated and that the connectors used are reliable. Ageing connectors of poor quality oxidate easily and cause malfunction of the system. 6.2.1 RF cables If the antenna cable is shorter than 5 m a good quality 50 ohm RF cable can be used (e.g.

  • Page 20: Check List

    SATELLINE-1AS and SATELLINE-2AS Check List When installing and configuring a radio data modem following points should be considered: Before connecting the RS-232 interface to equipment always check that the operating voltage is switched off. Consider the exact location of the equipment for optimum results...
  • Page 21 SATELLINE-1AS and SATELLINE-2AS APPENDIX 1. The timing diagram of RS-232 interface of SATELINE-1AS and SATELLINE-2AS radio modems. RTS/CTS handshaking must be used in data speeds 2400 bit/s and 4800 bit/s. The timing of the data transfer is the SENDING DTR / pin 1...
  • Page 22 SATELLINE-1AS and SATELLINE-2AS The delays in data transfer between two SATELLINE-1AS or SATELLINE-2AS radio modems will become clear in the following diagram. It also includes the CD line - in the receiving mode - of a third radio modem. RTS1 CTS1 20...25ms...

  • Page 23: Selecting Of Radio Channel Of Satelline-2As

    SATELLINE-1AS and SATELLINE-2AS APPENDIX 2. Selecting of radio channel of SATELLINE-2AS Due to the synthesized radio there is a possibility to change the frequency of Satelline-2AS radio modem. A fixed band of sixteen adjacent channels spaced by 25 kHz has been set to the hardware of the modem at the factory.

  • Page 24: Table Of Selectable Radio Channels

    Table of Selectable Radio Channels Channel Frequency Range (software settings) (harware settings) **x.200 - **x.575 MHz **x.200 **x.225 **x.250 **x.275 **x.300 **x.325 **x.350 **x.375 **x.400 **x.425 **x.450 **x.475 **x.500 **x.525 **x.550 **x.575 **x.600 - **x.975 MHz **x.600 **x.625 **x.650 **x.675 **x.700 **x.725 **x.750 **x.775 **x.800 **x.825 **x.850 **x.875 **x.900 **x.925 **x.950 **x.975 **y.000 - **y.375 MHz **y.000 **y.025 **y.050 **y.075 **y.100 **y.125 **y.150 **y.175 **y.200 **y.225 **y.250 **y.275 **y.300 **y.325 **y.350 **y.375 **y.400 - **y.775 MHz **y.400 **y.425 **y.450 **y.475 **y.500 **y.525 **y.550 **y.575 **y.600 **y.625 **y.650 **y.675 **y.700 **y.725 **y.750 **y.775 **y.800 - **z.175 MHz **y.800 **y.825 **y.850 **y.875 **y.900 **y.925 **y.950 **y.975 **z.000 **z.025 **z.050 **z.075 **z.100 **z.125 **z.150 **z.175...
  • Page 25 SATELLINE-1AS/2AS - RSSI ANHANG 4 SATELLINE-2AS SATELLINE-1AS -120 -115 -110 -105 -100 Pin / dBm Tolerance ± 10 dBm...

This manual is also suitable for:

Satelline-2as

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