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List of terms
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DMS-MTX DualMode Metrocell Cell Site Description
FDMA
Frequency Division Multiple Access. A frequency assignment arrangement
whereby all users share the total frequency allotment and each frequency is
assigned to a given user at access on a multiple user access basis.
Filter
A frequency selective device which is tuned to pass some frequencies and
attenuate others. Common filter types include high-pass, low pass, band-pass,
and notch filters
FM
Frequency Modulation. A modulation technique that causes the frequency of the
carrier to vary above and below its resting frequency; the rate of which is
determined by the frequency of the modulating signal and the deviation of which
is determined by the magnitude of the modulating signal.
Forward path
The path from cell site to cellular subscriber.
HSMO
High Stability Master Oscillator. A unit that provides a highly stable 4.8 MHz
reference for synchronizing the Transmit Receive Unit (TRU).
ICP
Intelligent Cellular Peripheral. A switch site peripheral that provides an interface
between the cell site and the switch. The ICP also oversees the operations of the
cell site.
ICRM
Integrated Cellular Remote Module. A cell site peripheral that serves as an
interface between the Intelligent Cellular Peripheral (ICP) and the radio
transmission subsystems. The ICRM is designed to support both analog and
digital Radio Frequency (RF) equipment.
IM
Intermodulation. A type of interaction between signals in a nonlinear medium
which produces phantom signals at sum and difference frequencies. These
phantom signals may interfere with reception of legitimate signals occupying the
frequencies upon which they happen to fall.
Isolation
The attenuation (expressed in dB) between any two signal or radiation points.
LCR
Locating Channel Receiver. A radio receiver which is frequency agile and is used
to measure and report the received signal strength, in dBm, of a channel.
Loss
A magnitude of attenuation, expressed in dB, for a given path between any two
points.