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3. ADJUSTMENTS
3.1 Installation Check
After installing the system it is a good idea to
check it for proper installation, following the
checklist provided below.
❒ Cable gland is facing toward the stern.
❒ Four fixing bolts securing the antenna unit
are securely tightened.
❒ The signal cable is waterproofed at the base
of the antenna unit.
❒ The antenna cable is securely retained
against the mast or mounting and is free of
interference from running rigging.
❒ The cable gland on the deck or bulkhead is
waterproofed, if provided.
❒ Connectors of external equipment are
securely plugged into the radar display unit.
❒ The power connections to the battery are of
correct polarity.
3.2 Exchanging Display
Unit of Previous Model
When exchanging the display unit of the
MODEL 1712 with that of the MODEL 1622 or
1621/1621 MARK-2, it is necessary to select
the appropriate display setting. This should be
done with the radar in stand-by.
1. Press % and & together for about 10
seconds to show the display shown in
Figure 20.
NAV DATA (NMEA 0183)
GLL BWR BWC GLC GTD
RMA RMB RMC VTG MTW
DBT DBS DPT GGA
PROGRAM NO
03591620XX
SEL MENU
BY KEY
MAIN
DEMO
▲
▲
/
MODEL 1712 1622 1621/M2
DISPLAY
1
2
Figure 20 Maintenance menu
2. Select MODEL by %.
3. Select 1622 or 1621/M2 by
.
4. Press the [MENU] key to close the menu.
3.3 Adjustments
Do the following in order to adjust the radar.
1) Adjustment of picture
1. Press the [POWER] key on the display unit.
The display should light. In approximately
one minute, ST-BY appears at the screen
center.
2. When ST-BY appears press the [TX] key.
The radar will start transmitting, and you
will probably see some targets, even
though the radar is not yet properly
adjusted.
3. Adjust the GAIN to display a small amount
of noise on the screen.
4. Press the [–] key several times to select
the minimum range. Adjust the STC to
display nearby radar targets clearly on the
screen. Too much STC action will eliminate
small targets, and too little STC action will
cause the screen to be so full of targets
and noise that it is hard to determine which
target is which as compared to visual
sightings.