Operation Manual

Fiber Distributed Antenna System (Fiber DAS)
3
Single mode
fiber
Single Mode Fiber has a relatively narrow diameter, through which only one mode will propagate
typically 1310nm or 1550nm. Single Mode Fiber is required for analog modulated systems such
as the Bird Fiber-DAS system.
SMA Sub-miniature version A. A Type of RF Connector.
Switch
A network switch is a computer networking device that connects devices together on a computer
network.
TETRA
Terrestrial Trunked Radio. TETRA uses Time Division Multiple Access (TDMA) with four user
channels on one radio carrier and 25 kHz spacing between carriers.
UL See “Uplink”
UMTS
Universal Mobile Telecommunications System is a system where broadband signaling and
packeted data are used. The standards are handled in the 3GPP group and the most common
type of modulation is WCDMA.
Uplink The signals that are transmitted from the terminal (phone) towards the base station.
SC-PC A type of fiber-optic connector which is not angled and should not be used with Bird Fiber-DAS
SC-UPC Ultra-polished fiber-optic connector. Not recommended with Bird Fiber-DAS
RF
Radio Frequencies, denominates the range of transversal electromagnetic waves with a
frequency from 3 kHz to 300 GHz. The upper end of the spectrum is often referred to as
microwave frequencies.
WCDMA
W-CDMA
Wideband Code Division Multiple Access is a technology employed by base station
manufacturers who make UMTS base stations. This technology is commonly used in 3G networks
and the main modulation employed in Europe.