User's Manual

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This chapter describes operation of SMDR-NH124. It deals with procedures and operations for
normal system operation after installation. It also describes operations per unit and interworking
methods.
6.1 HROU Operation
The figure below shows the level of the system link of Alliance DAS (BIU-ODU-HROU). This
section describes HROU-related information. HROU receives various signals through optical
modules. The signals are filtered only for corresponding signal band from a corresponding RDU
module and amplified with a High Power Amplifier. RDU’s output power is radiated through
antenna port of enclosure. HMRU can drop up to 3ARUs using RF cables
BIU ODU
TX
-20dBm~+10dBm
Composite power
RX
0dBm
Composite power
-7 ~ - 8 d B m / B a n d
Composite power
-7~-12dBm/Band
Composite power
λ:1310nm
λ:1550nm
Max 5dBo
MRU ARU1 ARU2 ARU3
TX Composite power/ Band
700PS : +44.5dBm
700LTE : +44.5dBm
800PS : +44.5dBm
900I+PA : +44.5dBm
850C : +44.5dBm
1900P : +44.5dBm
AWS-1 : +44.5dBm
RX Input power
-5 0 d B m / B a n d
Figure 6.1 – Level diagram
6.1.1 HROU Operation
HROU is in one-body enclosure type. And this can be installed on a wall basically.
HMRU can expand HARU up to 3. HMRU transmit/receives signal from ODU or OEU
and transmits TX signal to HARU, receive RX signals from HARU.
HMRU can support optical loss up to 10dBo for DOU with 1 optical port, and up to
5dBo for DOU with 4optical ports. According to optical loss, HMRU compensates
optical loss based on internal calculation formula. Per band, it can control output power
and ALC function, AGC function and shutdown function.
HMRU and HARU provide antenna port each band.
The following show operational procedures after installation of HROU.