Table of Contents Introduction .................................................................................................................................................. 3 1. Radio Modem MR400 ............................................................................................................................. 4 Radio Part MR400 ......................................................................................................................................... 5 Modem Part ...............
Introduction This operator manual serves as the primary document for familiarising users with the parameters of the radio modem, its properties, modifications and with the parameters of interfaces. In order to master all the functions of the radio modem and the MORSE system you should refer to other documents. Figure 1.
1. Radio Modem MR400 (MR300, MR160) MR 400, MR300 and MR160 are conceptually new radio modems designed for transmitting data in the VHF and UHF bands. The radio modem uses 4-state FSK modulation providing for a maximum signalling rate of 21.68 kbit/s. The radio modem is of modular design with one to four standard RS232 ports (an RS422 or RS485 port can be used in place of two of them) available to the user.
2. Description of Functions Radio Part MR400 The architecture of MR400 (MR300, MR160) radio modems resolves most of the requirements placed on a top quality user friendly radio modem with a very short switching time between receiving and transmitting. Frequency synthesis enables software selection of an arbitrary channel from the given frequency range. The operation of the radio part is controlled and diagnosed by the microcontroller.
3. MR 400 Connectors Antenna The antenna connector is of the N type, female, impedance 50 Ohm. The antenna cable must be fitted with an appropriate mate. We recommend using the RG213 50 Ohm cable. The H1000 cable should be used when the length of the antenna feeder exceeds 25 m. Important CAUTION. The radio modem should be powered only when the antenna (or artifical load) is connected. Otherwise it could lead to damage to the radio part of the modem.
Ethernet Connector RJ-45 for Ethernet 10BaseT and 100BaseT corresponds to the EIA TIA T568B standard. Informative LED diodes indicate: Tx – output from CU Rx – input to CU 100 – if lit the 100BaseT LINK network is indicated – indicates correctly connected F.D. link – indicates full duplex operation. A “straight” cable is needed for connecting to the Ethernet network via the hub (repeater) or switch-hub (router). A “crossed” cable is mostly used when just two devices are connected “back-to-back”. E.g.
passed to this terminal about the method of supply; level TTL0 – 230 V AC supply, TTL1 – battery supply. If the radio modem is supplied in another manner the method of supply is deduced according to the voltage (the value from which the supply is considered as supply from a battery can be set in SW).
Figure 3.2.
4. Table of Technical Parameters Table 4.1. Table of technical parameters TYPE Frequency range EU USA MR400: 380 – 470 MHz 406 – 412 MHz, 421 – 512 MHz MR300: 290 – 380 MHz MR160: 136 – 180 MHz Channel spacing 25 kHz or 12.5 kHz Method of setting the working frequency Software in the range 3.2 MHz MTBF (mean time between failures) 60 000 hours Switching time transmitting/receiving < 1.5 ms Operating range of temperature -25 to +55 °C Nominal supply voltage 13.8 V Supply voltage range 10.8 to 15.
5. Dimensional Diagram Figure 5.1.
6. Labelling Radio Modems Figure 6.1.
7. Conditions for MR400 Operation Radio modem installation and maintenence Radio modems MR400 (MR300, MR160) shall always be installed by personell who have been trained by RACOM or by an authorised representative of RACOM. Information contained in the documentation, including this manual, can not fully substitute the training required. MR400 as such does not require any regular maintenance when properly installed.
Conditions of Liability for Defects and Instructions for Safe Operation of Equipment. Please read these safety instructions carefully before using the product: • In order to comply with FCC's RF exposure limits for General Population/Uncontrolled Exposure, the antenna used for this device must be fixed-mounted on outdoor permanent structures and must not be co-located or operating in conjunction with any other antenna or transmitter.
Declaration of Conformity RACOM s. r. o. hereby declares that its radio modem MR400 (MR300, MR160) product complies with the basic requirements and other respective measures of regulation 1999/5/EC. This equipment therefore bears the CE marking. The warning exclamation mark in the circle marks the radio modem as class 2 equipment denoting radio equipment with possible limitations or with requirements on authorisation to use radio equipment in certain countries.
Limitations of Use. The MR400 radio modem has been developed for the frequency range 380 – 512 MHz. Specific Specific subranges are approved to be used in each country or region. A radio modem user must keep in mind that this radio device cannot be operated without the permission of the respective local radio spectrum administrator who provides a specific frequency for use and issues the appropriate permission for this.
DISCLAIMER: RACOM s. r. o. (hereinafter referred to as RACOM) is the exclusive owner of all rights to this operator manual. All rights reserved. Any duplication of this manual in any way, shape or form, or translation to any other language (without the prior written consent of the owner of the rights) is strictly forbidden.