Description
2-25
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2
3
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5
2.4.3.2
Distribution
From the power supply source, the primary convertor generates the + 48 V and + 12V
regulated voltages:
• AC sources
: 100-240 V AC, 50-60 Hz voltage,
• external DC source
: 12 or 24 V DC voltage (limits 10.8 to 31.2 V DC).
2.4.3.2.1 + 12 V distribution
The primary convertor's + 12 V voltage is provided as soon as it is powered up. This
voltage is distributed on the synchronisation board.
The synchronisation board generates two 3V3 voltages with the primary convertor's 12 V:
• 3V3L to power the logical part of the synchronisation board,
• 3V3 to power the TCXO.
The 12 V voltage is also used for the different analog and radio parts of the synchronisation
board and is redistributed to the duplexers (antenna diversity option).
2.4.3.2.2 + 48 V distribution
The + 48 V is distributed to the 3G PA-TRX module and the synchronisation board.
The 3G PA-TRX
module
is equipped with a 10 A fuse (not accessible).
The synchronisation board's 48 V is only used to power the fans.
