User's Manual Part 2

PN 8100-40 LGCell 4.0 Installation, Operation, and Reference Manual C-1
620004-0 Rev. E
APPENDIX C Frequently Asked Questions
• What is the LGCell Distributed Antenna System?
The LGCell Distributed Antenna System (DAS) contains multiple low-power radi-
ating elements that are deployed around indoor facilities to improve coverage and
capacity. The unique, patented architecture of the LGCell DAS provides an inex-
pensive solution to the wireless operator or wirless network manager for cover-
age/capacity upgrades and private microcell applications.
• What is twisted pair cable? Will it pick up spurious emissions?
Twisted pair (TP) cable is the standard cable that you find at the back of your com-
puter for the network hookup. TP cable is the most ubiquitous cable in any office
building. Furthermore, TP cable is inexpensive and easy to install. The twisting
nature of the cable creates a transmission line for efficient signal transfer and rejec-
tion of spurious emissions The LGCell uses a state-of-the-art common-mode rejec-
tion device that reduces pickup of spurious emissions on a TP cable by a factor of
10,000.
• Can a single LGCell simultaneously support multiple access standards (such as
1900 TDMA/CDMA/GSM)?
Yes. The LGCell is a frequency selective product. The LGCell system is transpar-
ent to the protocol that the base station and mobile unit use. You can view the
entire system with all the cables together as a frequency selective repeater with a
specified gain.
• What is the bandwidth of the LGCell?
LGCell passes selected frequencies to minimize amplification of unwanted signals.
Refer to the data specifications for the RF bandwidth of the system.
Another interpretation of bandwidth is the amount of data that the LGCell system
can transmit. The microcellular or macrocellular base station to which the LGCell
is connected limits the bandwidth or capacity of the LGCell, which is independent
of the wireless protocol and service. Total, composite output power and spurious
emissions are the only constraints that limit the number of channels that an RAU
can radiate. Furthermore, the LGCell system will not limit the data rate of the mod-
ulation transmitted through the system.