概述：
The MX521A is a precision D/GPS positioning solution in a smart antenna.

Better than 1m (RMS) DGPS position accuracy and better than 5m (RMS) GPS accuracy
NMEA 0183 version 3.0 interface
IMO type approved (as part of an MX display system) including RAIM (receiver autonomous integrity monitoring)
Design for easy upgrade of existing MX420 installations to latest IMO standards

The IMO approved MX521A smart antenna delivers position accuracy better than 1 meter in DGPS mode, and better than 5 meter accuracy in standard GPS mode. The MX521A can be configured to use several space based augmentations systems (SBAS) such as EGNOS, WAAS and MSAS in areas outside of DGPS beacon coverage

规格：
Technical/Environmental
Mounting [S,F,B] ：1 inch - 14 TPI Pole Mount
Operating Temperature ：-30°C to +70°C
Operating Temperature Stored： -40°C to +85°C
Diameter [mm] ：182
Product Height ：102 mm 4 in
Product Weight ：0.5 kg 1.1 lbs
Power
Power Consumption ：< 3 W
Power Supply (Supply Voltage) ：10.5 to 32 VDC vDC
Reverse Polarity Protection ：Yes

Communications
Baud Rates ：4800 (default), 9600, 19200
Correction I/O Protocol ：RTCM SC-104
Data I/O Protocol： NMEA 0183 V3.0
Serial Ports： 2 duplex NMEA 0183 Ports

GPS Navigation
Frequency Range ：283.5 to 325 kHz
GPS Receiver Channels ：12
Horizontal Accuracy ：<2 m="" 2D-RMS=""> 
Pulse Log Emulation ：61 dB @ f ° +/- 400 Hz
Receiver Type ：L1, C/A code, 1.575 GHz Frequency
Satellite Reacquisition