User's Manual

AR Standard Repeater Overview
1-6 044-05250 Rev A
a high cover chassis. This repeater type has the ability to work with GSM (GMSK) and EDGE
(8PSK) in GSM and PCS systems. AR17xx, AR27xx, and AR37xx are EDGE compatible.
A channel selective CDMA or WCDMA repeater is used for digital code division systems in
accordance with IS-95 (CDMA 2000 – 3GPP2) for CDMA and 3GPP / UMTS for WCDMA or
J-STD-008 standard, and wideband digital code division systems. It can be equipped with two
channels in the cabinet and additional two channels in a high cover. It can be connected with
either a donor antenna or RF cable and a service antenna or RF cable.
Channel selective High Power CDMA/WCDMA repeaters are the same as the CDMA/WCDMA
repeaters but are equipped with a 6dB (typically) Booster Amplifier (BA) in the downlink path.
The BA is located in the high cover with its own PSU and reduces the number of channels to
two in the cabinet.
Band Selective (BSel) Repeater
The band selective repeater has an adjustable bandwidth and is used for analog or digital
systems such as GSM, TACS, ETACS, AMPS, DAMPS, CDMA and WCDMA. This repeater
type can be equipped with one band in the cabinet and additional one band in a high cover. It
can be connected with either a donor antenna or RF cable and a service antenna or RF cable.
Repeaters with RF / Fiber Optic Transmission
Base Station Master Unit (BMU)
A BMU is equipped with a Fiber Optic Node (FON) for optical transmission on the service side.
It has an RF port for BTS connection and can provide up to four fiber optic ports that can be
connected to Fiber Optic Repeaters (FORs) and WRHs by using WDMs and splitters. FORs
and WRHs can be fed in parallel with double or single fiber optic cables. Up to eight FORs and
WRHs can be fed if the BMU is equipped with a high cover and two FONs. The BMU is also
available as a 19" rack mounted unit called an Optical Conversion Module (OCM). Information
on the OCM is located in the Fiber Optic Equipment User Manual (044-052530).
Repeater Master Unit (RMU)
An RMU is a repeater equipped with a FON for optical transmission on the service side. The
RMU has an RF port for a donor antenna and provide up to four fiber optic ports that can be
connected to FORs and WRHs by using WDMs and splitters. FORs and WRHs can be fed in
parallel with double or single fiber optic cables. Up to eight FORs and WRHs can be fed if the
BMU is equipped with a high cover and two FONs.
Repeater with Fiber Optics / RF Transmission
A FOR is a repeater equipped with a FOU for optical transmission on the donor side. The FOR
can connect to either a service antenna or RF cable. The FOR has a fiber optic donor port and
an RF port for a service antenna (or RF cable). This unit can be connected to a BMU or RMU.
Combined Repeater
Some of the repeater types mentioned above can be combined in the same repeater chassis
and be in operation in parallel. This can be used for different systems or different operators.
One repeater part is located in the cabinet and an additional repeater part is located in a high
cover. A combined repeater can, for example, have two RF ports for donor antennas (or RF
cables) and two RF ports for service antennas (or RF cables).
Repeater Chassis Design
The repeater is housed in a cast aluminium waterproof chassis, class NEMA4 / IP65 approved
for outdoor use but is also suited for indoor installations. The chassis consists of a cabinet and
a cover attached with hinges. The cabinet contains the repeater circuitry. The cover comes as
either a low or high version. The high cover can be used as an empty cover or be equipped as
a part of the repeater or an independent repeater unit. A repeater with a high cover that is
equipped as two independent repeater units (combined repeater) can, for example, be
equipped for channel selective operation in the cabinet and band selective operation in the
cover.