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AIS
Introduction
The TCB AIS Class B receiver and transmitter unit is the culmination of six years AIS development, and the application of some of the most advanced wireless digital development skills and techniques. The result is a small, low cost, reliable, robust and high performance product suitable for a variety of applications within the AIS environment.
Features
 
Simple Design Concept
TCB's AIS Class B is an elegant single PCB solution optimising the combined application of hardware and software
 
Standard NMEA interface
As standard the TCB Class B can be connected to any NMEA compatible GPS plotter or suitably configured PC or PDA
 
Anti-Tamper
TCB's Class B is enabled to alert users and/or authorities if the unit has been either removed or tampered with once installed  (configurable option additional to the Class B specification
 
Distress Alert Transmit
Distress alert button enables the user to transmit a distress alert with the GPS position of the vessel (configurableoption additional to the Class B specification)
 
Water Resistance
Robust, coated aluminium case, to ensure the unit is able to operate in the harshest of environments. IEC60945 - Cat C.
 
Internal GPS Module
TCB's Class B includes an integral GPS module to facilitate ease of installation and use.

Physical
Dimensions: 190 x 135 x 83 mm (L x W x H)
Weight: 1450g
Power
12V DC (9.6-15.6V)
Average power consumption 6W
Power Consumption 0.5A continuous
GPS Receiver (AIS Internal)
IEC 61108-1 compliant
RTCM corrections
Electrical Interfaces
RS232 38.4kbaud bi-directional
RS422 NMEA 38.4kbaud bi-directional
Connectors
VHF Antenna connector
GPS Antenna connector
RS232/RS422/Power
Environmental
IEC 60945
Operating Temperature: -25ºC to +55ºC
VHF Transceiver
1  Transmitter x 1
2  Receiver x 2 (one time shared between AIS/DSC)
3  Frequency : 156.025 to 162.025 MHz in 25KHz steps
4  Output power:33dBm 1.5 dB
5  Channel Bandwidth: 25KHz
6  Channel Step: 25KHz
7  Modulation modes
                     25KHz GMSK (AIS, TX and RX)
                     25KHz  AFSK (DSC, RX only)
8Bit rate9600 b/s 50 ppm (GMSK)
   1200 b/s 30 ppm (FSK)
9RX SensitivitySensitivity - 107dBm 25KHz
                               Message Error Rate 20%
Co-Channel 10dB
Adjacent Channel 70dB
IMD 65dB
Blocking 84dB
 
Designed to be compliant with the following standards
1  IEC62287 FDIS
Draft IEC standard, Class B AIS
2  IEC60945 Edn 4.0
 IEC standard, environmental requirements
3  ITU-RM.1371-1
 Universal AIS Technical Characteristics
4  IEC61162-1 Edn. 2.0
 IEC standard, digital interfaces part 1
5  IEC61108-1
  IEC standard, GPS receiver equipment
6  ITU RR AP18eWRC2000
Radio Regs., Appendix 18, Table of frequencies in the VHF maritime mobile band
7  ITU R M.493-9
 Digital Selective Calling system for use in the maritime mobile service
8  ITU-R.M 825-3
        Characteristics of a transponder system using DSC for   use with VTS and ship-to-ship identification
Introduction
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