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Radar Operation Manual Page 15
12. Move the ShuttlePoint knob down to highlight MBS and adjust to 000 by moving the
ShuttlePoint knob to the right.
13. Move the ShuttlePoint knob down to highlight
TX TRIGGER DELAY and adjust moving
the ShuttlePoint knob to the right to a point that the center looks as a solid circle as
shown in the diagram below.
14. To save the TX Trigger Delay setting, move the ShuttlePoint knob down to
Done and
press [ENT].
098
Figure 3.1.0c - Adjusting Trigger Delay
MBS (Main Bang Suppression) Adjustment
(ONLY FOR MDS-9 DOME & MDS-10-4/MDS-10-5 OPEN ARRAY ANTENNAS)
The MBS is used to remove the echo closest to the vessel as shown in the right image in
figure 3.1.0c. If Main Bang appears at the screen center (it looks like a as a circular dot)
suppress it as follows:
1. Transmit on a long range about ten minutes.
2. Press [MENU]. Move the ShuttlePoint knob to highlight
TUNING and press [ENT].
3. Move the ShuttlePoint knob to highlight
TX TRIGGER DELAY and press [ENT].
4. Move the ShuttlePoint knob to highlight
GAIN and press [ENT]. Adjust the Gain in such
a way that the circular dot is clearly displayed.
5. Move the ShuttlePoint knob to highlight
MBS and press [ENT]. Increase the MBS value
until the circular dot is completely erased from the screen. Do not increase the MBS
more than the value required to completely erase the main bang it otherwise you run the
risk to suppress also target echoes.
3.1.1 Automatic Tune (NOT NECESSARY AT FIRST INSTALLATION)
The Tune control is used to tune the receiver in the Radar antenna for maximum target
returns on the display.
The Radar comes from the factory already tuned so this operation
is not necessary at first installation. In general Radar tuning may be necessary if the Radar
antenna was serviced.
Automatic Tune
In Automatic Tune mode, the Radar tunes itself automatically on all range scales. It is
recommended to execute the Tune function in Automatic mode. This generally ensures that
the Radar receiver is always tuned to receive the maximum signal.
After the Radar Antenna is installed (or has been on the vessel for a year or longer) perform
the Automatic Tune procedure, which adjusts the receiver Gain to show targets on all
ranges.