SEACOM Solutions for Coast Radio Systems Productggpresentation R a d i o a a S y s t e m s
System Concept Schnoor Seacom Communication (SSC) The Schnoor SEACOM VHF radio system was developed to be used as a universal base station radio unit at coasts and inland waterways. The system s modular structure allows a customer specific adaption to local restrictions and needs. Digital Control Centre This system enables the user to operate with multiple transmitter/receiver-units locally and/or remotely. Existing equipment like information- or control-units of the user can be integrated in this concept via interface-modules. It is also possible to operate in a parallel mode with several control-units and/or direct connections to the control centre. Monitoring System Intercom Station SEACOM Professional Basestation Duplexer ISFU (ISDN) Keyboard+ Mouse Client Control Unit IPFU (IEEE802.3) ADIF (E1) ANFU (4-wire) Transmitter-/ Receiver Control Unit SEST Transmitter Receiver Interface User Touch Screen Operator Unit Fig. 1 System Structure of a digital control centre with SEACOM Professional Basestation and duplexer 2
SEACOM Professional Base Station The stationary radio units are built up as system components and fit in 19 racks. These system components fulfill the requirements according to ETSI-standard EN301929-1 for stationary maritime radio units and guarantee reliable operations, even in long term stress operation. This reliability is, for example, ensured by the reinforced cooling areas. This enables operation under normal, non-climatized conditions. Because the antenna switching unit is separated, this unit can be used for several modes like simplex, duplex or semiduplex and repeater functions. Fig. 2 SEACOM Professional Basestation Digital Selective Calling (DSC) For use as DSC radios, the SEACOM Professional base stations do not require an external DSC modem. A version of the IPFU IP interface unit is available which includes an optional DSC coding and decoding module. DSC coding and decoding is more robust than typical software solutions and provides superior performance even for weak signals and long messages. DSC information is then transported via the IP interface as packet data in a SIP protocol. For systems which use other interface cards such as an E1 card, the optional DSC module can still be installed in the SEACOM radio without an IP interface and therefore without the need for an external modem. Fig. 3 IP Interface, digital (IPFU) 3
SEACOM System Components - choice of options IP Interface, digital (IPFU) The IPFU is an interface card based on the IP-protocol and can be connected to an ethernet system. The audio communication is done by VoIP with synchronous transmission of data for control and configuration. ISDN Radio Interface Connection (ISFU) Line interface for digital transmission paths, connects via ISDN basic rate dial up access. Radio Station Interface, analogue (ANFU) Line interface for dedicated analogue transmission paths, connects via 4-wire analog line. Analogue-Digital Interface (ADIF) Line interface for digital transmission paths, connects via E1. Versions to connect mulitple radio via a single E1 are available. 4
Standard Operator Unit (SPAN) Analog 4wire UP 0 E1 Digital (S 0) VoIP Touch Screen Operator Unit (TSBG-NIF) Touch Screen Operator Unit (TSBG) Breakout Card for measuring proposes (MTBF, optional) The MTBF card is implemented in the system for measuring all incoming and outgoing AF-signals. Also all system parameters like output power or VSWR will be measured and displayed. 5
Simulcast systems SEACOM VHF radio systems are also available as simulcast systems (also called single frequency networks). This is advantageous where optimized radio coverage can only be achieved with a number of base stations. At the same time, simulcast systems do not require ship s crews to switch channels (besides the fact that as little frequency resources as necessary are used). For systems using E1 connections to the radio base stations, the ADIF cards provide fully automated runtime alignment. This alignment meets the requirements of simulcast systems. Simulcast systems pose two additional technical requirements over non-simulcast installations: - highest frequency stability of the base station transmitters. Transmitter carrier frequencies must be highly stable but also adjustable with a minimal variation. - Modulation at base station radios must also be synchronized by achieving equal transport time of modulation signals to the different base stations. Various types of solutions are available for SEA- COM systems depending on the transmission paths to radio base stations: In a conventional simulcast system with the radio base stations connected via 4-wire analog circuits, an equalizer is located at the central system location which makes sure that even with different transmission paths of different length to the various base station locations, modulation is synchronous on all of these locations. Fig. 6 Central controller for E1- connected simulcast network In systems with IP transmission paths to the radio base stations, the synchronization requirement cannot be achieved with a simple equalizer: Voice is transmitted in coded format over an IP network which does not offer constant transport time for data. A dedicated solution is available for the simulcast SEACOM radio system: The simulcast IPconnected base stations buffer received coded information and process them synchronized by a GPS signal received at each transmitter location and the central simulcast controller so that after decoding digitized voice in the radio base stations, modulation on the air interface is synchronous again. This SCHNOOR simulcast over IP technology supports VHF maritime simulcast networks connected via IP transmission paths. Fig. 5: Central controller for simulcast network with analog transmission paths 6
Radio cabinet SEACOM The basic version of the SEACOM system cabinet allows for the integration of up to 2 VHF radio units, including the accessory units. Additionally, it is possible to integrate an uninterruptable power supply (UPS). It is also possible to integrate additional units into this cabinet. These may also include a complete antenna combiner for connecting multiple radios to a single antenna. Schnoor also provides bigger system cabinets for the integration of max. 4 transmitter-receiverunits. The system cabinets fulfill the requirements of the operator concerning the stability against environmental conditions. Fig. 7 Basic System Cabinet with 2 VHF radio units. Fig. 8 Radio base station rack with 3 transmitters/ receivers, redundant power supplies and control equipment. 7
Technial data General data: Operation modes: Channel setting: Modulation modes: Data transmission: Antenna impedance: Temperature range (operations): duplex, simplex, semiduplex remote or local PM (G3E, G2B) FFSK / DSC acc. ITU-R M.493-2 50 ohms -20 C up to +55 C Receiver: Audio Frequency deviation: 100 Hz up to 3kHz Frequency range: 156,00MHz bis 162,025MHz Sensitivity: 0,35µV EMK (20dB SINAD) Channel spacing: 25kHz / 12,5kHz Modulation: PM (G3E Voice and G2B DSC) Adjacent channel selectivity: >70dB, >60dB @12,5 KHz Intermodulation response rejection: >85dB Supply voltage: 13,5 VDC +/ 0.1V Current consumption: 350mA RF connector: N-Norm Dimensions: Cabinet basic: Cabinet comfort: SEACOM radio unit incl. antenna interface: SEACOM radio unit excl. antenna interface: Power supply information: Transmitter Audio Frequency deviation: Nominal deviation: Frequency range: Channel spacing: Modulation: Adjacent channel power: 100 Hz up to 3kHz 3KHz at 1KHz AF and -6dBm (388mVeff) at 600 Ohm 156,00MHz bis 162,025MHz 25kHz PM (G3E Voice and G2B DSC) >80dBc @25,0KHz >70dBc @12,5KHz Supply voltage: 13,5 VDC +/ 0.1V Current consumption: 9A at 40W power RF connector: N-Norm Output power: 0.. 43/50W 22 height units plus cabinet base and top, H:1600 mm W: 800 mm D: 400 mm Weight: approx. 200 kg 40 height units plus cabinet base and top, H: 2100 mm W: 800 mm D: 600 mm Weight: approx. 340 kg H: 216 mm W: 483 mm D: 210 mm H: 132 mm W: 483 mm D: 210 mm The power supply of the SEACOM system can be built up with or without uninterruptable power supply (UPS), depending on customer needs. Standard power supply will be 230V/AC or 110V/AC. In the case of a power failure, an optional internal uninterruptable power supply takes over and guarantees continued operation. Alternatively, this redundancy can be achieved by an external UPSsystem. The power consumption of a system cabinet depends on the integrated equipment, but is at least 100 VA. The maximal power consumption (4 transmitter-receiver-units, highest load) is 800 VA. Schnoor Industrieelektronik GmbH & Co KG - Subjekt to modifications / Issue 11/2015 Schnoor Schnoor Industrieelektronik GmbH GmbH & Co. & Co. KG KG Headquarter: office: Fehmarnstraße Fehmarnstraße 6 6 24782 24782 Büdelsdorf Büdelsdorf Germany Germany Fon: (+49) 4331 34 76-0 Fax: (+49) 4331 34 76-20 E-Mail: info@schnoor-ins.com E-Mail: info@schnoor-ins.com Internet: www.schnoor-ins.com Internet: www.schnoor-ins.com Additional Offices: Berlin Düsseldorf Hamburg Munich Saarbrücken