JMA-9100 Instruction Manual > 7.SETTINGS FOR SYSTEM OPERATION > 7.2  SETTINGS
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4) Set the starting azimuth of the sector blank by operating the 
[EBL] dial, and left-click the   button. 
The start angle of the sector blank will be set.
5) Set the ending azimuth of the sector blank by operating the [EBL] 
dial, and left-click the   button.
The end angle of the sector blank will be set.
7.2.3 TNI Blank Setting  (TNI Blank)
Set a sector range and stop tuning operation in the bearing range.
If a structure such as the mast is close to the radar antenna, automatic tuning 
operation may become unstable. In this case, set a TNI blank in the direction of 
the structure in order to stabilize the tuning operation.
Only one type of a sector can be created. The TNI blank function operates in the 
relative bearing with the bow as the benchmark.
7.2.3.1 TNI Blank Function On/Off (Sector)
Procedures
1) Open the Serviceman Menu.
2) Perform the following menu open procedure to open the TNI 
Blank setting menu.
   → 
   → 
3) Select the item   in the menu, and turn on or off the TNI 
blank function.
7.2.3.2 TNI Blank Area Creation  (Make Sector)
Procedures
1) Open the Serviceman Menu.
 : The TNI blank function is operated.
 : The TNI blank function is stopped.
ENT
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2. Installation Menu
9. Next
2. TNI Blank
1. TNI Blank
On
Off