User's Manual

Page 17 of 25
Figure 5 IRCU, PCU and Antenna System Connection Diagram
5.3 Mapping of IRCU RET port to Phase Shifter & Scanning Mode
Comba existing IRCU products can satisfy 1 to 8 RET phase shifter control. All control and
driver chip are integrated into single IRCU module whereby the usage of IRCU can be further
categorized. The relative specifications are as shown in Table 11. It may be noted that
Comba R&D, with the current technical skills, is able to rapidly develop a series of new IRCU
module containing higher number of driving control unit, so as to meet the requirement of
in-built RCU electrical tilt antenna with higher number of frequency bands supported.
Parameter
Product
No. of Motor
Driving Control
Unit
Suitable RET Antenna
Installation Manner
IRCU-302
3
1 to 3 freq band build-in
RCU RET Antenna
Plug and play
IRCU-C414
4
1 to 4 freq band build-in
RCU RET Antenna
Plug and play
IRCU-502
5
4 to 5 freq band build-in
RCU RET Antenna
Plug and play
IRCU-602
6
6 freq band build-in RCU
RET Antenna
Plug and play
IRCU-C814
8
5 to 8 freq band build-in
RCU RET Antenna
Plug and play
Table 11 IRCU in relation to Antenna Suitability
PCU-H002
Antenna
PCU
Antenna Antenna
BTS
AISG TMA
SBTSBT
SBT
(a) (b)
(c)