Andrew Wireless Innovations Group MRB-LMR ユーザーズマニュアル

In the high-power option, the RF is split into four separate paths by the hybrid
combiner/splitter module and distributed to four RF PAs. In the medium-
power option, the RF is split into two separate paths and distributed to two RF
PAs.

NOTE: The multiple amplifiers provide soft-fail redundancy to maintain
minimum output power capability should one or more fail in the field.

The PA outputs are summed in a second combiner/splitter, then routed to the
mobile-side duplexer.   The duplexer routes the downlink RF output to the
coverage antenna, which transmits to handsets in the booster coverage area.

Mobile handset transmissions are received at the mobile duplexer port and
routed to the LNA input by the mobile duplexer.  The amplified LNA output
is then routed to the repeater duplexer, which is connected to the installed
repeater’s coverage antenna port.

A diversity option offers a second, identical uplink path when diversity is in
use in the donor BTS or repeater.

Control functions include PA keying, fan control, and uplink attenuation
setting.  Monitored parameters include PA output power, status, system
temperature, power supply temperature, DC output voltage and status, and
input power source (ac or dc).

Resident software can be accessed via the supplied serial interface cable with
a laptop computer and terminal-emulation software to initialize and customize
the unit during installation or to perform troubleshooting.

The booster can be remotely controlled after installation with a Mikom MR
series repeater via the I

2

C bus interface cable.

For other applications, or if remote control is not required, a pair of relay
closure outputs from the booster can be user-configured and routed to the
donor system to flag system problems after installation.