Simrad HS80/MX575C, User Manual

Page: 5 / 55

4 |
Introduction | HS80/MX575C User Manual
Introduction
Overview
The HS80 GPS Compass and the MX575C DGPS Compass are based upon a new generation
GPS engine technology.
Figure 1-1: HS80/MX575C side view
¼ Note:
When referring to both the HS80 GPS Compass and the MX575C DGPS Compass this
manual uses the term HS80/MX575C. When referring to either product, this manual uses
either HS80 or MX575C, respectively.
The HS/80/MX575C is a complete GPS compass and positioning system in a single enclosure
that requires only one power/data cable connection. With its NMEA 2000/NMEA 0183 support
and ease of installation, the HS80/MX575C is the perfect solution for marine applications.
The HS80/MX575C is an integrated system that houses the following:
-
New GPS engine technology
-
Dual GPS antennas
-
DGPS beacon module and H-field beacon antenna (MX575C only)
-
Power supply
-
Single axis gyro
-
Tilt sensor on each axis (X and Y axes)
The gyro and tilt sensors are present to improve system performance and to provide backup
heading information in the event that a GPS heading is not available due to signal blockage.
¼ Note:
The HS80 GPS Compass is identical to the MX575C DGPS Compass with the exception
that it does not contain a DGPS beacon receiver and H-field antenna. If you purchased the
HS80 GPS Compass, disregard the sections of this manual that discuss the beacon signal,
receiver operation, and implications to installation relating to the beacon signal.
The new GPS engine technology supports multiple RF front ends - enabling tighter coupling
of measurements from separate antennas for use in heading-based products. Users will
achieve excellent accuracy and stability due to the more accurate code phase measurements,
improved multipath mitigation, and fewer components.
The HS80/MX575C GPS antennas are separated by 50 cm between their phase centers,
resulting in +/- 0.5° RMS heading performance. The HS80/MX575C provides heading and
positioning updates of up to 20 Hz and delivers positioning accuracy of +/- 1.0 m 95% of
the time when using differential GPS corrections from beacon (MX575C only) or from Space
Based Augmentation Systems (SBAS).
The HS80/MX575C also features the GPS’ exclusive COAST™ technology that enables the
GPS receivers to utilize old differential GPS correction data for 40 minutes or more without
significantly affecting the positioning quality. The HS80/MX575C is less likely to be affected
by differential signal outages due to signal blockages, weak signals, or interference when
using COAST.
1