6.1 Selftest
6-5
6.1.7 FELCOM 12
The status monitor shows the system status.
If the [C/N] indicates OK and the value is stable, the system works normally. If NG is
indicated, check is made on the coaxial cable connector, antenna unit, and
communication control unit in that order.
Fig. 6.1.5 FELCOM 12 Status screen
If C/N value is unstable, faulty contact is suspected. Observe Lissajous’ figure between
TP4 and TP5 on the CPU board. Gently applying an impact to the board and connector,
check whether the figure changes or not.
Fig. 6.1.6 BPSK resurge waveform
Note) When replacing the CPU board (16P0148), remove U11 (EEROM) from
the old board and use it on the new boar. The forward/return ID of the vessel is
stored on the EEROM.
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