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6. INITIAL SETTINGS
14
DGPS Operation checking
1. Press MENU ESC and 7.
2. Press
several times to display the following.
MENU:Escape
Jan 21 2006 23:59’59" U
:STATION MESSAGE
DGPS INTEGRITY STATUS
ID: 274
Bit Rate: 200 bps
Sig Strength: 83 dB
Health: 0
Freq: 323.0 kHz
SNR: 21 dB
DGPS DATA: Good
BEACON STATION:
Good
D3D 100m
SAFE
Signal to noise ratio
Beacon signal status*
Reference station status*
DGPS signal strength
This value is between 1 and 84.
The higher the value, the stronger the signal.
If a noise appears at reception bandwidth,
the value becomes bigger.
This value is between 1 to 22. The higher
the value, the better the reception of
beacon signal. When this value is less
than 20, the error is included in the
correction data. In this time, position
fixing is done by using past position data.
When the ship is in the service area of a
beacon station, this value should be 21 or
22. If not, check as follows.
• Check the grounding.
• Check the radar beam interference.
• Check the noise of power generator of
the ship.
*It is necessary that GPS is working properly.
When GPS is malfunctioning though DGPS is normal,
the message "No Good" may be shown.
Input/Output Setting
The GP-150 can output navigation information to external equipment. For example, it can
output position data to a radar or echo sounder for display on their display screen. You can
convert a Loran Plotter to a GPS Plotter with position data from the GP-150.
Before selecting data to output, confirm what data the external equipment requires. Output
necessary data only. Outputting unnecessary data can cause receiving problems at the
external equipment.
Talker
All data transmitted by marine electronics equipment is prefixed with a two-character code
which tells external equipment what equipment is transmitting data. This two-character code
is called the talker. The GP-150 contains the talkers GP, LC and DE.
Because GPS is a relatively new system some early model equipments do not recognize
the GP talker name. In this case transmit data using a conventional talker, which equipment
recognizes, such as Loran C.