Manual Part 5

CD U-F
Table 2 Power Consumption and Heat Generation
Max. Power Consump tion Max. Heat Generation
70 W 70 W
4 Function Description
This section describes the functions of the TX and RX parts of the CDU-F.
CPU
MR
CDU bus
DC in
Pfin1 Pfin2
TX2-2
TX2-1
TX1-2
TX1-1
Prin1 Prin2
CNU
FC
TXLP
TXBP-DPX
MCU
RXBP-DPX
RXBP
TX/RX
RX
Pr1out
Pr2out
Pf1out
Pf2out
DC
CXU
RX2
RX1
TXin
LNA
Power supply supervision
P007451B
TX2-1+TX2-2
TX1-1+TX1-2
Figure 1 B lock Diagra m of CDU-F
4.1 TX Part Description
A CDU-F has four filter cavities grouped internally two and two. The two filters
form a combiner for two TX si gnals and can be comb ined with a Combining
Netwo rk Unit (CNU) into a com biner for four signals, or can be connected to
another CDU-F to form a combining network for six signals.
The combined signals are fed through a lowpass TX filter to a dup lex filter.
The duplex filter allows the use of a single antenna both for transmitting and
receiving. The duplex filter is connected d irectly to the antenna connector on
top of the CDU-F.
All necessary connections for the TX combining network are made on the front
of the C DU-F with the CNU.
4 (6)
E
N/LZT 720 0237 Uen R3A