Standard Transmit Power AIS Class B B921

The B921 is a 2W CSTDMA Class B AIS transceiver, delivering em-trak's advanced performance and reliability through next-gen technology. Small and durable, this trusted transceiver processes all AIS transmissions in real-time, even at range limit, so you always have the complete picture and the time to respond.
em-trak's intelligent connectivity means the B921 can be connected to any chart-plotter and comes equipped with integrated GPS technology and best-in-class, ultra low power consumption. Installation is also simplified with our unique FLEXI-FIT® bracket system to have you up and running in no time at all.
Certified AIS Class B – 2W CSTDMA.
Global Certification – USCG / FCC / Canada / Europe.
SRT-AIS™ transceiver engine for superlative proven performance.
FLEXI-FIT™ bracket system for easy, convenient and secure installation.
Integrated high-performance GPS receiver & antenna (external antenna optional).
Ruggedized – protected from vibration, shock and extreme temperatures.
Small and lightweight.
Ultra-low power consumption – best in class.
Automated health and performance monitoring.
Enhanced RF screening to protect against electromagnetic interference.
Built-in power surge protection.
This transceiver must me configured prior to use download configuration software.
https://em-trak.com/installation/
PHYSICAL AND ENVIRONMENTAL SPECIFICATION :
Size : 150 mm W x 115 mm H x 45 mm D.
Operating temperature :  -25°C to +55°C
Ingress protection :  IPx6 and IPx7
ELECTRICAL SPECIFICATION :
Supply voltage : 12V or 24V DC
Supply voltage range :  9.6V – 31.2V DC
Average current :  (at 12V) – 135mA
Peak current :  2A
Galvanic isolation :  NMEA 0183 inputs only, NMEA 2000, VHF antenna port
CONNECTORS : 
VHF antenna :  SO-239.
GNSS : TNC.
Power/NMEA 0183/silent mode : 12 way circular multipole.
NMEA 2000 : 5 way Micro-C connector.
USB : USB Micro-B.
DATA INTERFACES : 
NMEA 0183 :  2 x bi-directional ports.
NMEA 2000 : NMEA 2000 Ed 3.101, LEN=1.
STANDARDS COMPLIANCE :
AIS standards :  IEC 62287-1 Ed. 3.  ITU-R M.1371.5.
Product safety standards :  EN60950-1 2006 +A11:2009 +A1:2010 +A12:2011 +A2:2013 EN62311:2008.
Environmental standards :  IEC 60945 Ed. 4.
Serial data interface standards :  IEC 61162-1 Ed 5.0.  IEC 61162-2 Ed 1.0.
NMEA 2000 :  NMEA 2000 Ed 3.101
GNSS performance standards :  IEC 61108-1 Ed 2.0. IEC 61108-02 Ed 1.0.
GNSS :
Systems supported :  GPS, GLONASS, BeiDou, Galileo (two of any combination, three including GPS, Galileo).
Channels : 72 Internal/external antenna – Internal or optional external antenna
VHF TRANSCEIVER : 
VDL access scheme : CSTDMA.
Operating frequency : 156.025MHz – 162.025MHz.
Channel bandwidth : 25kHz.
Receivers/transmitters :  2 x receivers, 1 x transmitter.
AIS receiver sensitivity (20% PER) :  -111dBm.
AIS transmitter power :  2W (+33dBm).