User's Manual Part 2

Frequently Asked Questions
C-2 LGCell 4.0 Installation, Operation, and Reference Manual PN 8100-40
620004-0 Rev. E
• Can the LGCell support multiband operation?
The LGCell provides a wide variety of single-band products, including the U.S.
800 MHz, European GSM 900, DCS 1800, Korean PCS 1800, U.S. PCS 1900 sys-
tems, and iDEN. You can use these systems together to provide multiband ser-
vices. In addition, LGC has dual band 800/1900, 900/1800, and 1800/1800 LGCell
systems available.
Additionally, an LGCell neutral host configuration can simultaneously support
multiple bands and protocols.
• Does the LGCell support paging applications?
Yes. The 900 MHz GSM and EGSM LGCells have been approved for paging and
two-way messaging in the U.S. and Canada. The products may be used over thier
entire operating frequency ranges for such applications.
• Can the LGCell system share the same UTP Category 5 cable with the Ethernet
network?
No. The LGCell system can use the existing unused cabling inside the building;
however, you cannot use the same cable to connect an RAU and a computer.
• What is the minimum power input to the Main Hub?
Refer to link budget calculation for the minimum acceptable power required to
provide the desired levels of RF coverage..
• What is the minimum detectable power of an RAU?
The minimum detectable power of system with 1 RAU is –114 dBm in a 30 kHz
bandwidth, –106 dBm in a 200 kHz bandwidth, and –98 dBm in a 1.25 MHz band-
width. These figures do not take into account the processing gain of different
access standards, which could decrease the minimum levels.
• What is the difference between connecting the LGCell to a roof-mounted
antenna and to a microcellular base station?
Connecting the LGCell to a roof-mounted antenna increases the coverage of the
indoor environment. Connecting the LGCell to a microcellular base station
improves both the coverage and the capacity in the building and might also provide
a private wireless office application for the customer.
• Does each Main Hub require a separate coaxial feed to the base station?
A typical RF input power per channel to the Main Hub is 0 dBm. This provides a
lot of margin (link budget margin) for interfacing with antennas through a base sta-
tion that typically has an output power of 20 dBm. Therefore, a power com-
biner/splitter might be installed between the Main Hub and the base station. This
enables one base station to connect to multiple Main Hubs.
• Can I exceed the 3 dB optical loss in the fiber?
No. Exceeding the 3 dB optical loss in the fiber will result in an unreliable link
indicated by sync alarms.