Saab R5 SUPREME AIS, Operation & Installation Manual

Page: 47 / 156

R5
SUPREME - Navigation System
CONFIGURATION
7000 118-301, A3 Page 47
frequency mode parameter is set to manual. Valid
frequencies are between 283.5 and 325 KHz, at 0.5
kHz intervals. This parameter is only available when
Tuning Mode is set to manual.
Bit Rate Mode The Bit Rate Mode parameter sets the bit rate mode to
either Automatic or Manual. In Automatic mode the R4
DGPS Navigation Sensor will automatically select the
correct bit rate to use for demodulating the radio
beacon signal. In Manual mode, the R4 DGPS
Navigation Sensor will use the specified bit rate.
This parameter is automatically set to Auto when
Tuning Mode is set to Database (Auto) since the bit
rate specified in the database will automatically be
used.
Bit Rate (bps) The Bit Rate parameter is used to set the bit rate used
for demodulation of the DGPS Beacon signal when
using the manual bit rate mode. The bit rate can be set
to one of 50, 100 or 200 bps. This parameter is only
available when Bit Rate Mode is set to manual.
Beacon Database The Beacon Database parameter is used to enable or
disable the Beacon Database. When the parameter is
set to off, the
Beacon Database view will not be
available. See section 5.11.6 for more information
about the
Beacon Database view.
4.2.5 GPS Antenna Offset
The GPS antenna offset feature can adjust the system position in Latitude and
Longitude using a preselected offset and external heading input.
This allows the GPS antenna to be located anywhere on a vessel, and still have the
position from a different reference point on the vessel.
This is feature is useful to prevent big shifts in position when a backup GNSS system
takes over from a primary GNSS system, and the two systems have a large GNSS
antenna separation.
During system setup of output port rates, it is important to set output of position
sentences with offset in order to let external systems receive offset data. See section
9.2
―Output Sentences‖.
NOTE: True heading data is required to calculate position offset. GPS antenna
offset will be zero if there is no valid heading data.