Description
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2.4.5
Functional description of the main sub-assemblies
2.4.5.1
Synchronisation board
The synchronisation board performs the following functions:
• 3V3L and 3V3 power supply,
• distribution of the power supplies on the connectors for the fans and the duplexer(s),
• 6.4 MHz reference pilot,
• clocks and synchro signals for the 3G PA-TRX and the slave IDR IDO 3G,
• management of the following 4 external alarms:
- convertor module (PWR):
X
fan unit alarm,
X
combined AC, DC and temperature alarm,
- duplexer module(s) (DX1, DX2):
X
LNA alarm,
X
TX alarm,
X
SWR alarm,
X
duplexer presence indicator,
- fan 1 and 2 (FAN),
• internal alarm management,
- synchro board temperature (internal ambient air),
- synchro board power supply,
- pilot and clocks,
• IDR IDO 3G master/slave configuration,
• supervision by LED of:
- slave configuration (EXT LED),
- voltage presence (PWR LED),
- fan unit alarm ( LED),
- SYNC alarm (SYNC LED).
