XIII
5.13 Simulation
(Checking the ATA according to a Pseudo Target) ·····················5-42
6. TRUE AND FALSE ECHOES ON DISPLAY
6.1 Radar Line-of-sight Range ·······························································6-1
6.2 Strength of Reflection from Target ··················································6-3
6.3 Sea Clutters ·······················································································6-3
6.4 False Echoes ·····················································································6-3
6.5 Display of Radar Transponder ·························································6-6
7. MAINTENANCE
7.1 Routine Maintenance ········································································7-1
7.1.1 Cleaning ........................................................................................................................... 7-1
7.1.1.1 Cleaning of the Radar ..................................................................................... 7-1
7.1.1.2 Cleaning of the ATA ...................................................................................... 7-1
7.2 Maintenance of Each Unit·································································7-2
7.2.1 Scanner Unit NKE-1055 ／ 1056 .................................................................................... 7-2
7.2.2 Display Unit NCD-3901-2 .............................................................................................. 7-4
8. COUNTERMEASURES FOR TROUBLE
AND ADJUSTMENT
8.1 Function Check ·················································································8-1
8.1.1 Function Check ................................................................................................................ 8-1
8.1.2 Testing Functions with Menu .......................................................................................... 8-1
8.1.2.1 Memory Test .................................................................................................. 8-2
8.1.2.2 Key Switch Test ............................................................................................. 8-3
8.1.2.3 Sensor Test ..................................................................................................... 8-4
8.1.2.4 Line Test ......................................................................................................... 8-4
8.1.2.5 ATA Status ..................................................................................................... 8-5
8.1.2.6 ROM Version ................................................................................................. 8-5
8.1.2.7 Error Logging ................................................................................................. 8-6
8.1.2.8 Magnetron Current, Running and Transmission Time ................................... 8-7
8.2 Failure Check ·····················································································8-8
8.3 Troubleshooting ··············································································8-10
8.3.1 Troubleshooting for the Radar ...................................................................................... 8-10
8.3.2 ATA Traubleshooting .................................................................................................... 8-12
8.4 Replacement of Major Parts ···························································8-14
8.5 Adjustment and Setting ··································································8-19
8.5.1 NSK Unit Adjustment ................................................................................................... 8-19
8.5.2 Adjustment and Setting at Installation .......................................................................... 8-22
8.5.2.1 Adjusting Tuning .......................................................................................... 8-22
8.5.2.2 Adjusting Bearing ......................................................................................... 8-23
8.5.2.3 Adjusting Range ........................................................................................... 8-24
8.5.2.4 Setting Antenna Height ................................................................................ 8-25
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