User Manual

DRAFT RF Front End System Integration Manual
044-05082 Rev. A
2-4
March 2001
Figure 2-1 DC IN, BATT1, BATT2 Terminal Board Layout
Table 2-1 DC IN, BATT1, BATT2 Terminal Designations
Terminal Point Designation
No Polarity 27VDC
No Polarity 27VDC RTN
2-7 MHU Power, Alarm, Control, and RF Connector
2-7.1 MHU Power
The system 220VAC power is routed to the MHU via the host circuit breaker panel then to the J5
connector on the Tx module (refer to figure 1-5 for the connector location and figure 2-1 and table
2-1 for the connector pin location and designation. The 220VAC is internally routed to the fans
and the module’s rectifier (power supply) circuit that reduces the 220VAC signal to the 27VDC
needed to power the amplifier. The power supply circuit also generates the +12VDC and –8VDC
used to power the MHU internal components.
The amplifier alarm system from the MHU to the MHUI is routed by way of the common box as-
sembly. Connections on the amplifier are made through the blind mate connector. Refer to table
2-3 for a description of the alarms and controls.
Figure 2-2 220VAC Input Connector
Table 2-2 220VAC Pin Designation
Pin Designation
ALine
BLine
C Neutral
C
B
A
J5
220VAC IN