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JMA-9100 Instruction Manual > 3.BASIC OPERATION > 3.2  OBSERVE AND ADJUST VIDEO
3.2.6.2 Using the automatic rain / snow clutter suppression mode
The rain / snow clutter suppression in accordance with the intensity of rain / snow 
clutter is possible. Use this mode when the rain / snow clutter's intensity differs 
according to directional orientation.
Procedures
1)  Press the [RAIN] dial. Alternatively, Left-click the Rain  MAN  
button located at the lower left of the display.
The automatic rain / snow clutter suppression mode is selected, and Sea  AUTO, Rain  
AUTO  is displayed in the lower left of the radar display.
2)  Make adjustments by turning the [RAIN] dial and the [SEA] dial.
Even when the automatic rain / snow clutter suppression mode is selected, turning the 
[RAIN] dial and the [SEA] dial can make fine adjustments manually.
Cance l
1)  Press the [RAIN] dial. Alternatively, Left-click the Rain  AUTO  
button located at the lower left of the display.
The automatic rain / snow clutter suppression mode is cancelled, and Sea  AUTO, Rain  
AUTO  is changed to Sea  MAN  ,Rain  MAN  in the lower left of the radar display.
3.2.7 Reset Alarm Buzzer [ALARM ACK] 
When an audible alarm is issued, use ALARM ACK to acknowledge the alarm 
information, stop the alarm buzzing, and stop the alarm lamp flashing. (If more 
than one alarm has occurred, press the switch for each alarm indication.) The 
alarm stops buzzing, but the alarm indication does not disappear.
Procedures
1)  Press [ALARM ACK] key. Alternatively, Left-click the Alarm 
Acknowridge  button located at the lower right of the display.
The alarm will stop buzzing.
NOTE:
When the automatic rain / snow clutter suppression mode is 
selected, the automatic sea clutter suppression mode is also 
activated.
It is not possible to set only the rain / snow clutter suppression 
function to the automatic mode.