COBHAM EXPLORER 8100 - Page 98

BUC installation
98-145510-E Chapter 7: Service and maintenance 7-17
7.5.3 Electrical specifications for BUC
The electrical specifications for BUC installation are the same on EXPLORER 8100 as on the
EXPLORER 8120.
BUC connectors
When you connect the installed BUC to the antenna pedestal you may use the BUC TX (N-
connector) alone or the BUC M&C (GCT C3 connector) together with the BUC TX
connector. For details on the BUC connectors, see page 4-9.
Use the BUC M&C connector if:
• Your BUC requires a BUC M&C connection.
• Your system requires more power than the BUC TX connector alone supports (See
specifications in the following section).
1
Electrical specifications for installation of 3rd party BUCs
• Maximum current using the N-connector: 6.3 A (derated)
• Maximum current using the BUC M&C (GTC C3) connector: 12 A (derated)
• Minimum unloaded supply voltage: 47 V
• Cable harness resistance: 0.4 Ohm @ 10 m cable.
Note: Output power will be lower for cables with higher resistance.
Power available at BUC M&C connector for BUC (average/peak):
Power available at BUC TX connector (N-connector) for BUC (average/peak):
1. If you are using the BUC TX connector alone, DC power is provided together with the RF
signal on the same connector. If you are using the BUC M&C connector, the BUC TX
connector provides only the RF signal and the BUC M&C connector provides the DC power
for the BUC.
ACU type
ACU input voltage
range
BUC M & C output power, Ave./Peak
-25° to 50° 50° to 55°
1000 W ACU 110 V to 264 V 505 W / 615 W 475 W / 475 W
90 V to 110 V 505 W / 590 W 450 W / 450 W
500W ACU 90V to 264V 90W
Table 7-20: Power available on BUC M&C (GTC C3 connector)
ACU type
ACU input voltage
range
BUC TX output power, Ave./Peak.
55°
1000 W ACU 90 V to 264 V 188 W / 264 W
500 W ACU 90 V to 264 V 90 W
Table 7-21: Power available on BUC TX (N-connector)