TB9400 Installation and Operation Manual
Description
15
© Tait International Limited November 2019
1.3
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 25
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 different 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 provides a brief description of the available 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. The position of a module in the subrack is defined by the socket
on the subrack interconnect board to which the module is connected by the
system control bus.
