EXPRESS DAS
Installation and Operations Manual
126
EXPRESS DAS Installation and Operations Manual – Version 2.2 November 2013
Optical Expansion Unit (OEU) –
The unit in the SOLiD DAS topology that expands a DAS to include
multiple buildings and structures using only one strand of fiber.
Optical Fiber –
A thin, glass or plastic thread that carries information in the form of light
:
a fiber- optic
thread.
Radio Frequency (RF) –
Electromagnetic wave frequencies used for communications signals, including
radio, television broadcasting, cell phone, and satellite transmissions.
Received Signal Strength Indication
– the ratio of pilot power to total power for each sector.
EC/Io –
The Ec/I0 is the energy per chip per interference density measured on the pilot channel; it is
effectively the signal strength of the pilot channel.
Main Remote Unit (MRU)
– The unit in the SOLiD DAS topology that amplifies each of the signals
individually, and then sends the signals to the antennas via coax.
SAW filtering
– Surface Acoustic Wave filtering cleans up the RF signal, overcomes the thermal noise,
and allows for properly filtered signals to be transported over the optical medium.
SNMP
– (Simple Network Management Protocol) is an Internet-standard protocol for managing devices
on IP networks.
Remote Drive Unit (RDU) –
Filters and high amplifies DOWNLINK (Tx) signals; Filters and amplifies
UPLINK( Rx) signals.
Voltage Standing Wave Ratio
– The ratio between the maximum standing wave amplitude and the
minimum standing wave value.
Wavelength Division Multiplexing
(WDM) – In fiber optic communications, wavelength-division
multiplexing is a technology that multiplexes a number of optical carrier signals onto a single optical fiber
by using different wavelengths of laser light.
Содержание EXPRESS Single-Carrier DAS
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