User's Manual

Intelibs, Inc Proprietary and Confidential Page 8
8
2 Product Description
Remote Unit for AWS is a part of the Distributed Antenna System (DAS) to clear RF shadows, to fill
coverage gaps existing among the adjacent cells and to enhance the quality of service of extending
coverage of 2100M AWS.
As shown in Figure 2-1, RU is a compact platform with the natural heat convection. As unified form
factor, RU services multiple technologies on a single platform with 2100MHz AWS band operating
frequencies. It can be mounted on the wall or 19” rack. Variety of the service antenna can be used from
short monopole antenna (e.g. rubber ducky antenna) to indoor multi-band ceiling Omni antenna (or
panel antenna).
Figure 2-1 RU system
2.1 Network configuration
RF signal from a carrier on the 2100MHz AWS band are fed to MHU and directed to fiber optic cable, to
transmit RF signals to remote RU system. MHU can have up to 6 connections with RU systems by
installing DOU cards. A fiber optic cable can be shared between different carriers by cascading optic
connection between MHU systems. Each frequency band signals have their own wavelengths in a single
fiber. Table 2-1 describes those wavelength assignments. Maximum allowed optic loss between MHU
and RU system is 10 dBo.
Table 2-1 Optic wavelength of each frequency band
Frequency band Downlink Wavelength Uplink Wavelength
2100MHz AWS
1,310 nm
1,550 nm
Cascading 2nd Carrier 1,350 nm 1,510 nm
RU systems with different operating frequency band can be interconnected via RF cables feed from RU-
AWS system. Typical MHU-RU network diagram is depicted in figure 2-2.