JMA-9172-SA Instruction Manual > 7.SETTINGS FOR SYSTEM OPERATION > 7.2  SETTINGS
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7.2.2 Sector Blank Setting (Sector Blank)
In order not to display radar echoes, set a sector range and stop transmission in the 
bearing range. Three types of sectors can be created.
The sector blank function operates in the relative bearing with the bow as the 
benchmark.
7.2.2.1 Sector Blank Function On/Off (Sector1,2 and 3)
1) Open the Serviceman Menu.
2) Perform the following menu open procedure to open the Sector 
Blank setting menu.
   → 
3) Set the sector blank number  ,  , or   with 
which the sector blank function operates.
The system allows the use of up to three sector blank areas.
Set each sector blank area to on or off.
7.2.2.2 Sector Blank Area Creation (Make Sector 1,2,3)
1) Open the Serviceman Menu.
2) Perform the following menu open procedure to open the Sector 
Blank setting menu.
   → 
3) Select the sector blank number (  to ) for 
sector creation, and click the Make Sector  button in the menu.
The selected sector blank will be made.
   : The sector blank function of the number is operated.
   : The sector blank function of the number is stopped.