User's Manual

Intelibs, Inc. Proprietary and Confidential Page 6

1 Introduction

Radio Hub Unit (RHU) is a part of the Hybrid Distributed Antenna Systems (HDAS) to provide RF link

solution between RF Source and Remote Unit (RU). This RHU receives RF signal from antenna or wireline

and this unit filters, amplifies and converts RF signal into optic signal and transmits to RU through single

mode fiber. RHU is built on a small form factor with four antenna ports for 850MHz, 1900MHz and two

GPS antenna ports with the following features:

 Support for a multi frequency band, multi-technology and multi-carrier

 Wide band sub-channel selection by digital filter

 Antenna isolation detection and oscillation protection function

 Low Power consumption that can be operated by PoE or small AC/DC converter

 20dBm Up Link composite power per band

 SNMP based remote management support

 Provide signal to remote unit (RU) site as far as 10Km distance via single mode fiber

 Optic fiber sharing between different carriers

 AGC (Auto Gain Control), ALC (Auto Level Limit Control) and ADS function

 Compact and high capacity with scalable design

 Ruggedized enclosure with more outdoor temperature compliance

 GPS signal support and transmission with path redundancy function

Hybrid DAS RHU is comprised of the following subsystems:

 FHU (Fiber Hub Unit): Interface unit between RHU and Remote Units, Convert O/E, compensate loss

and convert E/O. this unit has optic input port and optic output port.

 SRU (Small power Remote Unit): Small power (23dBm per band) remote unit for indoor

 HRU (High power Remote Unit): High power (30 ~ 43dBm per band) remote unit for outdoor

 MU (Master Unit): Element management server

As illustrated in Figure 2-2, Hybrid DAS network is comprised of RHU, FHU and SRU/HRU. RHU provides

RUs can transmit signal to coverage area. An optic cable can be shared between different carriers and

different band.