Installation and Operation Manual

Confidential & Proprietary 43/57 Alliance-TR
5.1. HROU
The figure below shows the level of the system link of Alliance-TR DAS (BIU-ODU-HROU). This section
describes HROU-related devices. When receiving downlink signals from each band through the R-Optic
module, the HRDU filters the signals and amplifies them with the high power amplifier.
Figure 6.1 – Level Diagram
1) LED Indicator
Turn on power to the HROU and then check the LED indicators at the front of each HROU. The table below
shows normal and abnormal cases depending on the status of each module.
Unit
LED
Description
RCPU
ON
Green: Power is supplied.
LD
Green: Laser Diode is normal.
Red: Laser Diode is abnormal.
PD
Green: Photo Diode is normal.
Red: Photo Diode is abnormal; check optical cables.
WL
Green flicker: transmitting/receiving data with BIU
ALM
Green: HROU system is normal.
Red: HROU system is abnormal; check the alarm.
RPSU
AC Status
Green: Power is supplied.
Red: Power is not supplied.