Introduction; Purpose; The Node Am4 Repeater - CommScope Node AM4 Manual

2. Introduction

2. Introduction

2.1. Purpose

Wireless communication systems provide a two-way information transfer (voice and data)
between a base station and multiple mobiles within a given area.
Repeaters are used to extend the transmission range if weak signal transmissions occur
within the coverage area due to indoor applications, topological conditions or distance
from the transmitter. In the downlink path, the repeater picks up the signal from a donor
antenna of an existing cell, amplifies and re-transmits it into the required dark spot. In the
uplink direction, the repeater receives signals from mobile stations present in its coverage
area and re-transmits the signals to the corresponding base station.
In the downlink (DL), the Node AM4 picks up signals coming from the base station, filters
them, amplifies them, and retransmits them to the mobile. In the uplink (UL), it picks up
signals from the mobile, filters them, amplifies them, and retransmits them to the base
station. The Node AM4 constantly monitors the quality of the signals passing through it.

2.2. The Node AM4 Repeater


Note: The denomination "Node AM4" says that this RF repeater is equipped with
slots for 4 RF cards / dummy cards.
 Universal multi-band, multi-service repeater for mobile applications.
 A coverage solution and a universal choice for selective transmission of interleaved
sub-bands for amplification of GSM, EDGE, TDMA, CDMA, WCDMA, HSPA, HSPA+,
and LTE signals within multiple frequency bands.
 Supports up to 4 frequency bands (with single-band RF cards only) or currently up to
7-8 frequency bands (with dual-band RF cards) in a single chassis with fully integrated
multi-band combiner and modem for remote monitoring and control.
 Software-based repeater platform enables on-the-fly filter changes and development
of new features and capabilities without expensive hardware upgrades.
 Channel and band selective automatic gain/ power control for mobile multi-operator
and public safety applications.
 Available in both medium and high power classes (for dual-band RF cards, medium
power class only) to enhance coverage in trains and ferry applications.
 Automatic Frequency Allocation enable self-acting repeater reconfigurations based on
received GPS position.
 Intuitive auto setup and help screens for easy system configuration, minimizing setup
time and reliance on expensive and bulky test equipment.
MF0121ACP_uc.docx Manual for Node AM4 Page 17