Справочник Пользователя для Andrew Wireless Innovations Group RPT-MR303V-90
User’s Manual for Repeater
MR303D Varia
M0041A8B.doc
Id.-No. 153114
Page 8
26-Oct-2000
1 INTRODUCTION
Cellular telephone systems transmit signals in two directions between base stations
and mobile telephones within the signal coverage area.
and mobile telephones within the signal coverage area.
If weak signal transmissions occur within the coverage area due to indoor
applications, topological conditions or distance from the transmitter, a repeater is
used to extend transmission range. 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 them to the corresponding
base station.
applications, topological conditions or distance from the transmitter, a repeater is
used to extend transmission range. 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 them to the corresponding
base station.
1.1 The MR303D Varia
The repeater MR303D Varia is a bi-directional amplifier with adjustable RF-
bandwidth. The first and the last channel of the transmission bandwidth can be set
manually by means of rotary switches. The repeater has been designed for
applications in medium sized rooms such as suites, offices and basements. A
quality connection with a mobile phone can usually not be established in these
rooms.
bandwidth. The first and the last channel of the transmission bandwidth can be set
manually by means of rotary switches. The repeater has been designed for
applications in medium sized rooms such as suites, offices and basements. A
quality connection with a mobile phone can usually not be established in these
rooms.
The repeater is equipped with a connector for an external receiving/transmitting
antenna which provides the RF connection to the mobile. Connection to the BTS can
be established via an outdoor antenna. Other components of the D.I.C.E. COAX
system can also be connected to the repeater.
antenna which provides the RF connection to the mobile. Connection to the BTS can
be established via an outdoor antenna. Other components of the D.I.C.E. COAX
system can also be connected to the repeater.
The final amplifiers are protected by individual level limiters, which allow the mobile
unit to be operated in close proximity to the repeater. Third order intermodulation
products are kept below the CEPT limit of -36 dBm constantly, even if the repeater
receives the signals of more than one mobile unit.
unit to be operated in close proximity to the repeater. Third order intermodulation
products are kept below the CEPT limit of -36 dBm constantly, even if the repeater
receives the signals of more than one mobile unit.