TB9400/TN9275 Installation and Operation
Description
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© Tait International Limited
May 2023
1.4
Modules
The base station consists of a subrack with up to two transmit/receive
channels, or up to four receive-only channels.
The single PMU (power management unit) supplies and manages power to
the whole subrack (refer to
“Theory of Operation” on page 31
and one PA (power amplifier) are needed for each transmit/receive channel.
There is also a front panel with user controls and fans. The modules are
interconnected at the front of the subrack. External connections to the
modules are located at the rear.
Modules come in variants depending, for example, on the RF band or the
supply voltage.
Each module is inserted into the 4U subrack from the front, and is secured
at the front with a metal clamp. Both clamp and module are easily removed
for rapid module replacement. The modules are secured laterally with
plastic guides that clip into the top and bottom of the subrack. These guides
can be easily repositioned to change the configuration of a subrack. The
heavier modules are also secured laterally by metal tabs at the rear of the
subrack.
The following sections provide brief descriptions of the base station
modules.
Subrack
The 4U subrack is made of passivated steel and is designed to fit into a
standard 19 inch rack or cabinet. The subrack is fitted with an interconnect
board that connects the system control bus and power to the modules and
front panel. A module’s position in the subrack is defined by the associated
interconnect board socket, which connects the module to the system
control bus.
