User's Manual

Intelibs, Inc Proprietary and Confidential Page 11
11
2.3 Modules
RU system is comprised of several internal modules such as combiner, amplifier, optic module, and
filters. Figure 2-4 shows inside of RU system.
Figure 2-4 RU system’s modules
Table 2-3 RU system’s modules
Module
Picture
Description
RFMUX
Divides incoming signals into RF and modem signals, and sends divided
signals to RFBS0/RFBS1 and FSK modem.
RFBS0_AWS
Controls a TX0 path gain, filters downlink frequency band, controls the
TX0 signal’s Crest Factor, and performs the Automatic level Control
(ALC) function. Output of this module is sent to High Power Amp (HPA).
RFBS1_AWS
Controls a TX1 path gain, filters downlink frequency band, controls the
TX1 signal’s Crest Factor, and performs the Automatic level Control
(ALC) function. Output of this module is sent to High Power Amp (HPA).
AWS_SOU
Performs E/O (Electric/Optic) or O/E conversion for downlink and
uplink signals.
AWS_FSK_MODEM
Data modem for out of band communications between MHU and RU
systems. Followings are modem frequencies for downlink and uplink.
- from RU to MHU: 311 MHz
- from MHU to RU: 374 MHz
RRCOM
Combines RX0, RX1, and Modem signals, and sends combined signals
to the AWS_SOU module for E/O conversion.
RRBS0_AWS
Amplifies RX0 signal by low noise high gain amplifier, filters for desired
band frequencies, and controls uplink path gain.
RFMUX
AWS SOU
RRCOM
RRBS1_AWS
RRBS0_AWS
Back Board Ass’y
RFBS1_AWS
RFBS0_AWS
3Way UL
FEU0_AWS
Tx HPA0_AWS
AWS FSK Modem
NMS B’D
3Way DL
PSU(AC/DC)
Noise Filter
FEU1_AWS
Tx HPA1 AWS
10dB Coupler