6. Maintenance & Check 55 
 
 
 Executing Line Monitor        
・Make LINE MONITOR a yellow display, press   or the [ENT] key, and the following menu is displayed. 
 
 
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・Make the monitor item a yellow display, press   or the [ENT] key, and the input/output data of the serial 
port is displayed, and input data is displayed in the upper part of the screen, and output data is displayed 
under the screen. 
・When the [CLR] key is pressed, it returns to the maintenance menu. 
 
 Displaying RX Monitor       
・Make RX MONITOR a yellow display, press   or the [ENT] key, and a present situation of the receiver is 
displayed. 
LEVEL  :Detection level of sea bottom (maximum value within the range from sea bottom detection 
position to the lower side) 
RANGE  :Range of sea bottom tracking 
GAIN  :Gain setting value 
・When the [CLR] key is pressed, it returns to the maintenance menu. 
 
 Displaying System No.        
・Make SYSTEM No. a yellow display, press   or the [ENT] key, and the program version is displayed. 
**/**/****  :  Date 
Ver.  **.**  :  Version 
・When the [CLR] key is pressed, it returns to the maintenance menu. 
 
 
 
 
 
 
 
NAV/DEPTH  :  Navigation data/Depth output 
ALR  :ALR Input/Output 
PRINTER  :Printer port