Manual Part 5

CD U-G

Table 2 Power Consumption and Heat Generation

Max. Power Consump tion Max. Heat Generation

30 W 30 W

4 Function Description

This section describes the functions of the TX and RX parts of the CDU-G.

TXLP

DPX

MCU

TXLP

DPX

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-G

4.1 TX part description

A CDU-G consists of two identical T X chains (the top and bottom parts in the

diagra m above).

The TX part con tains a Transmitter lowpass filter (TXLP) and a Duplexer (DPX).

The TXLP sup presses spurious emissions from the transmitter on frequ encies

higher than the TX band. The DPX 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)

N/LZT 720 0236 Uen R3A