Manual Part 5

CD U-J
3 Pow er Consumption and Heat Generation
Table 2 Power Consumption and Heat Generation
Max Power Consumption Max Heat Generation
30 W 30 W
4 Function Description
This section describes the functions of the TX and RX parts of the CDU-J.
TXLP
DPX
MCU
TXLP
DPX
MR
Filter unit 1
Filter unit 2
Tx 1
Rx 1
Rx 2
Tx 2
TX/RX 1
CDU Bus
DC in
TX/RX 2
MCU
P007449C
Figure 1 B lock Diagra m of CDU-J
4.1 TX Part Description
A CDU-J consists of two identical TX c hains – the top and bottom parts in
the Figure 1 on page 4.
The TX part contai ns a lo wpass filter and a duplex filter. The lowp ass filter
(TXLP ) suppresses spurio us emissions from the transmitter on frequencies
higher th an the TX band. The duplex filter (D PX) enables the use of a single
antenna for both transmitting and receiving.
There is a Measurement Coupler Unit (MCU) between the DPX and antenna
conne ctor. The MCU samples forward and reflected signals and distribute s
them to the Measurement Rec eiver (MR) for antenna return loss monitoring.
4 (6)
E
N/LZT 720 0469 Uen R1A