ICOM RD-200 User Manual

q Horse band (HAS-40)............................................... 2
w Extention pipe (2273 pipe)......................................... 1
e DGPS receiver......................................................... 1
INSTRUCTION MANUAL
DIFFERENTIAL GPS BEACON RECEIVER
RD-200
Thank you for purchasing the RD-200 DIFFEREN­TIAL GPS BEACON RECEIVER. Connecting this
DPGS beacon receiver to the Icom navigation sys­tems, will permit the GPS to pinpoint the ship loca­tion more accurately. Please read these instructions thoroughly before installing and operating the RD-
200.
SUPPLIED ACCESSORIES
The Differential GPS (DGPS) is a system where the GPS po­sitioning precision is advanced, and can be utilized efficiently for coastal maneuvers or other times where high precision positioning is vital. In order for the DGPS to be put into prac­tice, a reference station has to be established in close prox­imity, and a Differential responding GPS ship navigation system (sold separately) is to be installed. The reference station (generally a radio beacon station al­ready established) may assign true or arbitrary position read­ings due to false calculations of coordinates received from the GPS receiver and coordinates that have been previously received at the reference station. In this case, correct posi­tional data is produced and this data (RTCM SC-104) is sent out from the beacon transmitter.
For the operators, the position correction data is received at the Differential GPS beacon receiver and then transferred to the ship’s navigation system. By receiving this new and cor­rect positioning data the ship’s GPS navigation system will not only decrease the number of accidental errors, but will also improve the positioning precision. With the reference station and the remote receiver in close proximity precision is at a high level, but by increasing this distance the error count will increase. For the DGPS to coor­dinate correctly a distance of 100 to 200 miles is the most accurate range limit.
(In reference with RTCM: Radio Technology
Commission for Maritime Services).
WHAT IS DIFFERENTIAL GPS ?
q
e
w
GPS Receiver
DGPS beacon station
Position corrections
Reference station
GPS receiver
Beacon receiver
Satellite
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DGPS
18.0 m
CLR
SET
SET
CANC
H
0
10
20
30
40
ADJ SEL
GPS 34°18.000N 135°01.000E
USING DGPS ON OFF BEACON FREQUENCY
283.5KHZ AUTO BEACON BAUD RATE 100 200
OPERATION
The DPGS is a newly established system intended to improve the positioning precision of the GPS. (Optional RD-200 is required).
This chapter describes how to correct the positioning data using DGPS data, select the beacon station, and set the baud rate. When you activate the marine plotter (e.g. Icom FP-561) either of two screens will be displayed. The Plotter screen or the Sounder screen. All functions are able to be accessed and activated from these two screens.
(1) Using the DGPS
(2) Setting the beacon
frequency and baud rate
DGPS
18.0 m
CLR
SET
SET
CANC
SEL
H
0
10
20
30
40
GPS 34°18.000N 135°01.000E
USING DGPS ON OFF BEACON FREQUENCY
283.5KHZ AUTO BEACON BAUD RATE 100 200
To set the beacon frequency and baud rate (transmission speed), proceed as follows.
q Press the [MENU] key.
The Main Menu screen will appear.
w Select Positioning Menu screen using the [UP] or [DOWN] key and press the
[SET] key.
The Positioning Menu screen will appear.
e Select DGPS using the [UP] or [DOWN] key and press the [SET] key.
The DGPS setting screen will appear.
r Select Beacon Frequency using the [UP] or [DOWN] key and press the [SET]
key.
AUTO (default) will turn yellow.
t Select the frequency eld using the [LEFT] key. (See NOTE) y Set the frequency using the [UP] or [DOWN] key and press the [SET] key.
Set the frequency of the beacon station nearest to the current ship position. (Refer to the supplied Beacon Station Lists.)
u When the frequency fields have been set, select beacon baud rate using the
[UP] or [DOWN] key and press the [SET] key.
The selected item turns blue.
i Select 100 or 200 using the [LEFT] or [RIGHT] key and then press the [SET]
key. The beacon baud rate will be set as you selected.
If the Frequency of the beacon station has been set manually the baud rate of the beacon station must also be entered manually. (See NOTE)
o When you finish setting the beacon frequency and baud rate, press the [MENU]
key. You will return to the previous screen.
Using the DPGS data allows correction of the positioning data received by the built-in GSP receiver.
q Press the [MENU] key.
The Main Menu screen will appear.
w Select Positioning Menu using the [UP] or [DOWN] key and press the [SET]
key.
The positioning screen will appear.
e Select DGPS using the [UP] or [DOWN] key and press the [SET] key.
The DGPS setting screen will appear.
r Select Using DGPS using the [UP] or [DOWN] key and press the [SET] key.
The selected item turns blue.
t Select ON using the [LEFT] key and press the [SET] key. (default: OFF)
The selection is now saved.
y When you nish setting, press the [MENU] key.
You will return to the previous screen.
NOTE: Generally when setting the beacon frequency please select the ”AUTO option (as in step t). This will automatically select the highest (closest) signal intensity to the ship's present position. If the system fails to synchronize with this beacon station for one minute, it automatically starts to search for the highest signal in­tensity, again. In cases where the beacon frequency has been manually selected after referral to the supplied BEACON STA- TION LIST, ensure the corresponding baud rate is also entered. If both the beacon frequency and the baud rate are not correctly entered the position correction signal will not be received.
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