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1-2
1.2 Turning On and Off the
Power
The DD-80 takes about two minutes to find
position when turned on for the very first time.
Other times it takes about 20 seconds.
Note: The GPS provides highly accurate po-
sition information. However, position should
always be check against other aids to naviga-
tion to confirm reliability, for the safety of
vessel and crew.
Turning on the power
Press the [POWER] key.
The unit tests the PROGRAM MEMORY,
SRAM and battery for proper operation and
shows the results on the display. "BEACON
RCVR INSTALLED" appears at the bottom
of the display. The unit starts up with the last
used display mode and that mode is indicated
at the bottom of the display.
PROGRAM MEMORY = OK
SRAM = OK
Internal Battery = OK
BEACON RCVR INSTALLED*
DATA #3 : LOG PULSE OUTPUT
GPS receiving
condition
Several seconds
later
A
234°
345°
DGPS 3D
34° 23.456´ N 135° 45.678´ E
BRG
RNG
123
12.3
SPD
nm
kt
CSE
[01]
30
40
20
50
H
2nm
GPS receiving
condition
Several seconds
later
A
WGS84
Figure 1-2 Appearance of display when
turning on the power
When turning on the power the following oc-
curs:
20 seconds after turning on the power, accu-
rate position (in latitude and longitude) ap-
pears on the display.
If position could not be found, "NO FIX" ap-
pears at the GPS receiver condition window.
When PDOP value exceeds 6 in the 3D mode
or HDOP value exceeds 4 in the 2D mode,
"DOP" appears to indicate abnormal fixing
and the position indication could not be up-
dated.
When the satellite signal is being received nor-
mally, one of the indications shown in Table
1-1 appears depending on equipment setting
and GPS receiver state.
Table 1-1 GPS receiver indication
tnempiuqE
gnittes
etatsreviecerSPG
noitacidni
D2)lamron(D2SPG
D3)lamron(D3SPG
laitnereffiD
D2
)lamron(D2SPGD
laitnereffiD
D3
)lamron(D3SPGD