(2) Pull out the D-sub connector from radar process unit as shown in the following photograph. 
 
 
 
 
When JRC's VDR is used, by connecting it to TB4303(13,14)ARPATX± of terminal board circuit 
CDC-1397
A located in the display unit (radar process unit), it is possible to use the online maintenance 
function. 
 
Setting of display unit. 
1)  P
ress and hold [RADAR MENU] key. 
Th
e Code Input menu will appear. 
 
2)  Press the [0] key, and put the cursor on the    ENT    button, and press the [ENT] key. 
The Serviceman Menu will appear. 
 
3)  Open 
the Remote Maintenance menu by performing the following menu operation. 
 2. Installation Menu 
  →  5. COM Port Setting   
    → 4. TX Port  
  → 9. Next  
  →  5. Remote Maintenance   
 
4)  Select the send port. 
 3. ARPA . 
3-37