M/A-Com P5100 Series, Installation Manual

Page: 68 / 100

MM102225V1, Rev. B
67
TERM ACRONYM OR
ALIAS
DEFINITION
InterModulation
Rejection IMR The reject to the production, in a nonlinear element of a
system, of frequencies corresponding to the sum and
difference frequencies of the fundamentals and harmonics
thereof that are transmitted through the element.
ISM Controller
(BackHaul
Router) Control unit used to process data from the tower-top-
mounted Industrial, Scientific, and Medical (ISM)
transceiver.
(ISM is a license-free RF communications band; 2.4 GHz
and 5.8 GHz.)
Lightning
Arrester Protective device that provides a low impedance path to
ground for surge protection against dangerous voltages such
as lightning.
Low Noise
Amplifier LNA See Tower Top Amplifier.
Multicoupler Device to amplify and separate signals, used for single-
antenna sites.
Reception Signal
Splitter RX Splitter Passive device used with multiple receivers.
Network Access
Server
Cisco Router TCP/IP internetworking router connecting base site to the
OpenSky Network.
Device used initially: Cisco Router, Model 3600
Noise and
InterModulation
Cascade Analysis
System NIMCAS Program used to predict the expected difference in 20 dB
quieting measurements for terminated and feedline
connected results.
PolyPhaser
®
Producer of lightning arrester devices for surge protection.
Radio Frequency RF That portion of the electromagnetic energy spectrum used
for radio signal transmission and reception.
Receive;
Reception RX The action or process of selecting and decoding transmitted
RF signals using particular frequencies to reconstruct the
information transmitted.
Site Access
Server SAS
Tower-Top
Amplifier Low
Noise Amplifier TTA or TTLNA Used with receive only antenna installations (TX/RX
Systems, Inc.).
Transmit;
Transmission TX The action or process of coding information in the form of
RF signals, using particular frequencies to make it available
for reception.
TX/RX Hybrid
Power Divider An amplifier installed in conjunction with a Tower Top Amp
to feed additional receivers.