Raymarine GPS navigation Operation Manual page 69

3.10.5.2 Differential Beacon Operation
Ordinarily the Raytheon DGPS Beacon receiver works automatically to find
and track the radiobeacon providing differential GPS corrections in your
area. When the beacon is being received, "DGPS" is displayed in the message
area at the bottom of the various display modes.
The Beacon receiver is capable of operation in a [ t+mrtoN CORR
Manual Tuning mode via the NAV 398 menu. To
access the DGPS menus, the DGPS beacon receiver
must be connected, receiving a beacon signal, and
providing correction signals to the GPS sensor. The
message
"NO "
CONNECT
DGPS BEACON SELECT
menus will appear.
is the first screen. The "A" indi-
cates the receiver is operating in
the automatic mode. The fre-
quency of the beacon is dis-
played.
Each beacon operates at an as-
signed frequency. Usually bea-
cons operating in the same area
are assigned different frequen-
cies, so they are easily identified.
The baud rate of the data transmission is displayed. Although the baud rate
can range between 50 to 300 baud, most beacons are currently transmitting
at 100 baud.
The third item on the screen is "RSSI". The RSSI is the signal strength of
the received signal.
If thelJsoftkey is pressed you can set the frequency steps the beacon
receiver should use in its' search mode. The selections are 1 Khz or 500 Hz
steps. Although a few beacons operate at XXX.5 Khz intervals, most
beacons operate at XXX Khz. So, setting this to 1Khz will provide a faster
search and acquisition of the beacon in AUTO mode.
OPERATION 3-56
will not appear and when the
display
F R E Q U E N C Y
PREVIOUS I)
BEACON STATUS A
AUTO.
206 KHZ
B A U D RATE
100 mull
5 6
T H E N P R E S S E N T E R