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Displaying Position
1. Press the [MENU] key.
2. Press [▲] or [▼] to display "MONITOR
L/L?"
3. Press the [ENT] key. Position in latitude
and longitude appears. L/L ERROR ap-
pears when there is no L/L data.
35°45N 135°25E
Figure 10 Sample latitude and
longitude display
4. Press the [MENU] key.
Station Scan Time Out
You may set the time in minutes the receiver
waits (in the AUTO L/L mode) before re-
scanning for nearest reference station, when
the station currently selected becomes un-
acceptable (LOCK LED off). The default
setting is 10 minutes.
1. Press [RESET] while pressing and hold-
ing down [MENU]. Release [MENU]
when the display shows "SELF TEST?"
2. Press [▲] or [▼] to display "SET L
SCAN TIME?"
3. Press the [ENT] key.
4. Press [▲] or [▼] to set time.
5. Press the [ENT] key followed by the
[MENU] key.
Displaying Signal Strength and
Signal-to-Noise Ratio
Signal strength displays a numeric represen-
tation of field strength of the received sig-
nal on the selected frequency. The higher the
number the stronger the received signal.If a
noise appears at reception band width,the
number becomes bigger.
Signal-to-noise (S/N) ratio displays the ra-
tio between the desired signal and unwanted
noise on the selected frequency. The higher
the S/N ratio the better the quality of the sig-
nal.
When the ship is in the sy\ervice area of a
beacon station,this number should fbe be-
tween 20 and 22.If not,chack as follows.
• Check the grounding.
• Check the radar beam interference.
• Check the noise of power generator of the
ship.
1. Press the [MENU] key.
2. Press [▲] or [▼] to display "MONITOR
SS/SN?"
3. Press the [ENT] key. Signal strength and
S/N ratio appear. DATA ERROR appears
when no data is received from the DSP.
SS=0XX SN=0XX
Signal
strength
S/N ratio
Figure 11 Sample signal strength
and S/N ratio displays
4. Press the [MENU] key.
Remote Control
The GR-80 can be controlled remotely via
the serial I/O port by the GPS receiver con-
nected.
1. Press the [MENU] key.
2. Press [▲] or [▼] to display "SET RE-
MOTE?"
3. Press the [ENT] key.
4. Press [▲] or [▼] to select REMOTE ON
or REMOTE OFF.
5. Press the [ENT] key followed by the
[MENU] key.