Manual Part 6

HCUHybrid Combiner Unit

for the transmitted signal. If further combining is required, the HCU must be

introduced.

The HCU can combine the already combined signal from two dTRUs into a

common output. The benefit is that it is possible to expand capacity without

increasing the number of antennas. Synthesizer hopping is supported, and

using a HCU with a CDU-G makes synthesised frequency hopping possible.

The drawback is that the output power is reduced by half.

The HCU is a passive unit that does not require power feeding.

4 Interfaces

This section describes the connectors on the HCU.

Con nectors

P011095B

TRU1 TRU2 TRU3 TRU4 TRU5 TRU6

CDU1

TX1

CDU2

TX1

CDU3

TX1

1 2 3 4 5 6

8 9

Figure 2 HCU Connectors

The connectors are shown in the table below.

Table 2 HCU Connectors

Position Function

Connects to

1 TX1 in dTRU 1

2 TX1+TX2 out CDU-G 1:TX1

3 TX2 in dTRU 2

4 TX1 in dTRU 3

5 TX1+TX2 out CDU-G 2:TX1

6 TX2 in dTRU 4

7 TX1 in dTRU 5

8 TX1+TX2 out CDU-G 3:TX1

9 TX2 in dTRU 6

4 (6)

N/LZT 720 0449 Uen R2A