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ANTENNA TYPE
Select the antenna type connected to your display unit. Default setting is “F”.
Select the antenna type referring to the table shown below.
After selecting type, press the [ENTER] knob.
Your unit Setting
MODEL1823C-BB A
MODEL1833C-BB B
MODEL1933C-BB F
MODEL1943C-BB G
MODEL1953C-BB H
TUNING
MODEL 1953C-BB: Go to “Tuning for 1953C-BB power supply unit”, and then “Antenna
tuning”.
Other models: Go to “Antenna tuning”.
Tuning for 1953C-BB power supply unit
For MODEL1953C-BB, first tune the power supply unit to adjust the tuning point of the
tuning indicator.
1. Open the power supply unit cover.
2. On the RADAR SETUP menu, select STOP at ANTENNA ROTATION.
3. Close the menu, and then transmit the radar with the range more than 6 nm.
4. Flip the SW1 on the POWER Board upward (for tuning position).
5. Adjust R36 potentiometer clockwise so that LED CR13 lights in the highest brilliance.
Also connect a multimeter to TP5 (+) and TP (-), and then adjust R36, to show maximum voltage
on the multimeter.
6. Flip the SW1 downward (normal position, default setting).
7. Reassemble the power supply unit.
8. Go to “Antenna tuning” on the next page.
R36
POWER Board
19P1006
CR13
SW1
TP5
Upward
Downward
TP2
Power supply unit, cover removed