Satel SATELLINE-2ASxE User Manual
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Satel SATELLINE-2ASxE User Manual

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SATELLINE-2ASxE
RADIO MODEM
User Guide
Versio 2.0

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Summary of Contents for Satel SATELLINE-2ASxE

  • Page 1 SATELLINE-2ASxE RADIO MODEM User Guide Versio 2.0...

  • Page 2: Important Notice

    User Guide, Version 2.0 IMPORTANT NOTICE All rights to this manual are owned solely by SATEL OY (referred to in this user guide as SATEL). All rights reserved. The copying of this manual (without the written permission from the owner) by...

  • Page 3: Restrictions On Use

    SATELLINE-2ASxE (370…470 MHz) is allowed to be used in the following countries, either on licence free channels or on channels where the operation requires a licence. More detailed information is available at the local frequency management authority.

  • Page 4: Product Conformity

    User Guide, Version 2.0 PRODUCT CONFORMITY Hereby, SATEL Oy declares that SATELLINE-2ASxE radio modem is in compliance with the essential requirements (radio performance, electromagnetic compatibility and electrical safety) and other relevant provisions of Directive 1999/5/EC. Therefore the equipment is labelled with the following CE-marking.

  • Page 5: Table Of Contents

    TABLE OF CONTENTS IMPORTANT NOTICE......................1 RESTRICTIONS ON USE....................2 PRODUCT CONFORMITY ....................3 TABLE OF CONTENTS ......................4 SATELLINE-2ASxE Radio Data Modem .................6 1.1 Radio data modem ....................6 1.2 RS-232 pin connections ...................8 1.3 Technical specifications....................9 Transmission with the Radio Modem .................10 2.1 Transmission ......................10 2.2 Reception ......................11...
  • Page 6 SATELLINE-2ASxE User Guide, Version 2.0 7.2. Setting the radio frequency .................25 7.2.2 Setting the channel spacing ................25 7.2.3 Setting the data interface properties ..............26 7.2.4 Setting the addresses..................27 7.2.5 Setting the receiver status ................28 7.2.6 Setting the repeater function................28 7.2.7 Setting the SL-command function..............28 7.2.8 Setting the RTS line functions .................29...

  • Page 7: Satelline-2Asxe Radio Data Modem

    The operation of SATELLINE-2ASxE is similar to a cable although data transmission is half duplex. When planning a radio data modem installation it is important to take into account the slight delays of the radio modems and possible radio interference.
  • Page 8 Due to the incorporation of unique synthesizing techniques the SATELLINE-2ASxE is also suitable for systems with several base stations using different channels. The mobile substations can easily change the frequency for communication with the different base stations.

  • Page 9: Rs-232 Pin Connections

    SATELLINE-2ASxE User Guide, Version 2.0 1.2 RS-232 pin connections Signal Direction Level Description RS-232 Data Terminal Ready Operates as an ON/OFF switch RS-232 Carrier Detect Indicates a signal on the radio channel exceeding the sesitivity level of the modem (also interference signal)

  • Page 10: Technical Specifications

    SATELLINE-2ASxE User Guide, Version 2.0 1.3 Technical specifications The equipment complies with the ETS 300 113 and ETS 300 279 specifications TRANSCEIVER Frequency Range 370...470 MHz Channel Spacing 12.5 kHz/20 kHz or 25 kHz Number of Channels 160/100 or 80 Frequency Stability <...

  • Page 11: Transmission With The Radio Modem

    2 Transmission with the Radio Modem 2.1 Transmission The SATELLINE-2ASxE is ready to transmit data within 300 ms after the supply voltage is switched on and the DTR line is in the "ON" state. There are three different methods of initiating data transmission: 1.

  • Page 12: Reception

    The radio modem sets the CTS line when it is ready to accept data for transmission. 2.2 Reception The SATELLINE-2ASxE is ready to receive data within 300 ms after the power supply is switched on and the DTR line is in the "ON" state.

  • Page 13: Rssi Signal

    SATELLINE-2ASxE User Guide, Version 2.0 2.2.1 RSSI signal Received Signal Strength Indicator, RSSI, (D connector pin 5) can be used for the approximate determination of the radio signal strength on the current channel. In the following figure is the typical RSSI voltage (V) as a function of the signal level (dBm). In practise signal level exceeds –25dBm only if the distance to a transmitting modem is less than 10...

  • Page 14: Basic Connection Between Two Radio Modems

    In order to create a connection between two terminals transmitting and receiving data the radio modems should be programmed and wired as described below. In this case there is no external protocol in use. Basic setup of the programming menu ****** SATEL OY Salo, Finland tel: +358-2-7777800 ****** SATELLINE-2ASxE SW Version 1.00 Center Frequency 468.0000 MHz...

  • Page 15: Asynchronous Data Transmission And Data Speed

    SATELLINE-2ASxE User Guide, Version 2.0 3 Asynchronous Data Transmission and Data Speed If the character length or data speed is incorrectly set, errors will appear in transmission. At reception they appear as "error characters" or as incorrect operation of the modem.

  • Page 16: Special Break Character

    BREAK character is not transmitted. 3.2 Data speed The data speed of the SATELLINE-2ASxE is 1200 - 9600 bit/s with the channel spacing of 25 kHz and 1200 - 4800 bit/s with the channel spacing of 12.5 and 20 kHz respectively.

  • Page 17: Using Addresses In Data Communication

    SATELLINE-2ASxE User Guide, Version 2.0 5 Using Addresses in Data Communication 5.1 General It is possible to use addresses in both transmission (TX) and reception (RX). An address consists of two data characters (altogether 16 bits). The addresses can either be the same in both directions or when necessary the transmission and the reception addresses can also be different.
  • Page 18 SATELLINE-2ASxE User Guide, Version 2.0 Reception: Address Data Address Data Data Fig 3 Reception addressing has been set ON Fig 4 Reception addressing has been set and either the primary or secondary RX ON, but both the primary and secondary RX...

  • Page 19: A Connection Between Two Points

    SATELLINE-2ASxE User Guide, Version 2.0 5.2 A connection between two points In connecting two points it is advisable to set both the receiving and the transmitting addresses equal in both radio modems. This is the easiest way to control the addresses and the risk of interference from other systems working in the same area is minimal.

  • Page 20: A System With One Repeater Station

    SATELLINE-2ASxE User Guide, Version 2.0 5.4 A system with one repeater station In systems with several repeater, sub and base stations it is necessary to use addresses in the radio modems especially if there is more than one repeater station. A system with only one repeater station can be built without addressing.

  • Page 21: A System With Several Repeater Stations

    SATELLINE-2ASxE User Guide, Version 2.0 5.5 A system with several repeater stations P W R P W R S UB S TATIO N BAS E STATIO N In systems with several adjacent or parallel repeater stations addresses should be used. This prevents messages from circulating around the network and ensures that only a determined radio modem receives the message.
  • Page 22 SATELLINE-2ASxE User Guide, Version 2.0 All radio modems should have RX addressing set on and TX addressing set off. The base station and substation terminals add a chain of addresses to the beginning of the data. Addressing is used in...

  • Page 23: A Repeater Chain Using Dual Addressing

    SATELLINE-2ASxE User Guide, Version 2.0 5.6 A repeater chain using dual addressing If the data terminal equipment is not able to generate a string of addresses to the beginning of the data packet, dual addressing can still be used to connect two points using several repeaters.

  • Page 24: Test Mode

    SATELLINE-2ASxE User Guide, Version 2.0 6 Test Mode Test Mode offers a possibility to test the connection between two stations by using the internal test message beacon of a radio modem. By setting the radio modem into the Test Mode it continuously transmits either a data packet or carrier depending on the selection.

  • Page 25: Programming The Satelline-2Asxe

    Mode. In the Programming Mode the settings of the serial port are always 9600 bps, N, 8, 1. In this mode the settings of SATELLINE-2ASxE can be changed in the way described in chapter 7.2. If the SL-command function is activated the radio channel and addresses can be changed without moving into the Programming Mode.

  • Page 26: Setting The Radio Frequency

    Switching the radio data modem into frequencies other than those specified in the instructions is strictly forbidden. The use of non-approved frequencies can lead to prosecution by local authorities. SATEL is not responsible for any illegal use of its radio equipment.

  • Page 27: Setting The Data Interface Properties

    SATELLINE-2ASxE User Guide, Version 2.0 7.2.3 Setting the data interface properties The data interface settings can be set in menu 3. 1) Data Speed 9600 bps 2) Character Length 10 bits Enter selection or ESC to cancel > 1 1) 1200 bps...

  • Page 28: Setting The Addresses

    SATELLINE-2ASxE User Guide, Version 2.0 7.2.4 Setting the addresses The addresses can be set in menu 4. In this example the primary transmission address is changed and activated. 1) Tx Address 1 0000 (hex) 2) Tx Address 2 0000 (hex)

  • Page 29: Setting The Receiver Status

    SATELLINE-2ASxE User Guide, Version 2.0 7.2.5 Setting the receiver status The status of the receiver can be set in menu 5. 1) Set Function ON 2) Set Function OFF Enter selection or ESC to cancel > 1 In simplex solutions data reception can be switched off at the transmitting part of the system. This prevents possible external interference from preventing the data transmission.

  • Page 30: Setting The Rts Line Functions

    SATELLINE-2ASxE User Guide, Version 2.0 7.2.8 Setting the RTS line functions The RTS line functions can be set in menu 8. 1) Set RTS-Line Functions OFF 2) TX Control 3) RD-Line Control 4) Reception Control Enter selection or ESC to cancel > 1 TX Control The RTS line activates transmission and prevents the radio modem from entering reception.

  • Page 31: Setting The Tx Start Delay

    SATELLINE-2ASxE User Guide, Version 2.0 7.2.10 Setting the TX Start delay Transmitter starting delay in milliseconds can be set in menu A. Enter a new value ? 0000 In normal operation this parameter should be set to 0. If any other value is set, the radio modem waits for a given time between the first character to be transmitted and the beginning of the actual transmission.

  • Page 32: Sl Commands

    SATELLINE-2ASxE User Guide, Version 2.0 7.3 SL commands If the SL-command function is activated radio channel and addresses can be changed directly from the serial port of the radio data modem without connecting pin 12 to ground. SL commands should be sent using the data speed and bit settings which are currently in use.

  • Page 33: Saving Of The Current Setup

    SATELLINE-2ASxE User Guide, Version 2.0 The channels below the centre frequency are set with the SLLxy command and the channels above the centre frequency with the SLHxy command (max ± 1MHz). The number of the channel is a decimal number 00-40, if the 25 kHz channel space is used, and 00-80, if the 12,5 kHz channel space is used.

  • Page 34: Forming The Sl Commands

    SATELLINE-2ASxE User Guide, Version 2.0 8 Forming the SL Commands When programming the radio modem with SL commands, please note that the form of the addresses is different than in the Programming Mode. In Programming Mode an address is given in hexadecimal (values between 0000 and FFFF) e.g.
  • Page 35 SATELLINE-2ASxE User Guide, Version 2.0 Example 2 Hex. address dec.values Characters 0AFF 10, 255 LF, DEL 1. You can use a hex editor to create the address 2. If you have a PC you can type some of the characters by using ALT key together with the numeric keypad.

  • Page 36: Multi Modem Data Systems

    SATELLINE-2ASxE User Guide, Version 2.0 9 Multi Modem Data Systems 9.1 Transmission sequences The data should be transferred in continuous sequences or in sequences divided into blocks. Sequences that are too short (e.g. 1 character) should not be sent because the "overhead- information"...

  • Page 37: Planning A Radio Modem Network

    The transmitter power of the base model of SATELLINE-2ASxE is 1 W and the sensitivity of the receiver better than -115 dBm. Thus in a flat area and in free space with a 1/4 wave antenna (antenna amplification 1dBi) and antenna height of 1 m communication distances of 3 to 4 km can be achieved.

  • Page 38: Radio Field Strength

    SATELLINE-2ASxE User Guide, Version 2.0 10.2 Radio field strength Radio signal strength must be good enough for successful data transfer. Where field strength is above a certain level the operational results are very good. Below this level, a few dB marginal area occurs in which errors begin to be generated by noise and interference which will eventually lead to loss of connection.

  • Page 39: Installation

    SATELLINE-2ASxE User Guide, Version 2.0 11 Installation The radio modem is to be installed with the installation accessories supplied with the radio modem: 1. By using the installation 2. By using the velcro-type 3. By mounting the radio plate, which should be...

  • Page 40: Rs-232 Interface

    SATELLINE-2ASxE User Guide, Version 2.0 11.1 RS-232 Interface The radio modem is connected to terminal via RS-232 interface. A typical connection where all handshaking lines are used should be made according to the figure below. RADIO MODEM 9-PIN D-CONNECTOR 25-PIN D-CONNECTOR...

  • Page 41: Power Supply

    SATELLINE-2ASxE User Guide, Version 2.0 11.2 Power supply The supply voltage range is 9 - 30 V. The positive pole of the power supply should be connected to D 15 connector pins 14 and 15 and the negative pole to pins 7 and 8. The DTR line at pin 1 can be used as an ON/OFF switch.
  • Page 42 SATELLINE-2ASxE User Guide, Version 2.0 When ordering antennas please note that the antennas are tuned to a certain frequency range. Simple antennas and those made of stacked yagis have a relatively wide bandwidth. The frequency range of an antenna becomes narrower the more elements there are in the antenna.
  • Page 43 RS-232 1...15 m RS-232 1 ... n pcs. Base Station SATELLINE Computer Data Terminal Example of an antenna installation: By using of directional (amplifying) antennas and by installing antennas on a high location, long distances can be reached with SATELLINE-2ASxE.

  • Page 44: Equipment

    SATELLINE-2ASxE User Guide, Version 2.0 12 Equipment 12.1 Connecting antennas to radio modems Recommended antenna types are as follows: 12.1.1 Hand portable equipment 1/4 wave antenna (wave length on 450 MHz is about 70 cm) Helix antenna The antennas are mounted directly to the antenna connector (TNC) on the top of the radio modem.

  • Page 45: Cables

    There is also an interface adapter ARS-1F with a programming switch and power supply cables available for the SATELLINE-2ASxE radio modem. The interface adapter matches the connector of the modem and provides a 9 pin (female) D connector. In addition there is a straight cable with 9 pin connectors, CRS-9.

  • Page 46: Check List

    SATELLINE-2ASxE User Guide, Version 2.0 13 Check List When installing and configuring a radio data modem the 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 47 SATELLINE-2ASxE User Guide, Version 2.0 Appendix 1 Character Map...
  • Page 48 SATELLINE-2ASxE User Guide, Version 2.0 Appendix 2 Delays and timings of the RS-232 interface with a data speed of 9600 bps MODEM 1 MODEM 2 t0 = 17 - 20 ms (typ. 18 ms) delay between TD and RD data...

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